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train · 466k rows

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683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.7.3.4.2 Procedure	a) The SS produces a static wanted signal and a static interfering signal at the same time. The amplitude of the wanted signal is set to 4 dB above the reference sensitivity level. b) The unwanted signal is a C.W. signal (Standard test signal IO) of frequency FB. It is applied in turn on the subset of frequencies calculated in step c) in the overall range 100 kHz to 12,75 GHz, where FB is an integer multiple of 200 kHz. However, frequencies in the range FR ±600 kHz are excluded. NOTE: Allowance must be made for possible spurious signals arising from the SS. These are particularly likely at sub harmonic frequencies nFB where n = 2, 3, 4, 5, etc. c) The frequencies at which the test is performed (adjusted to an integer multiple of 200 kHz channels most closely approximating the absolute frequency of the calculated blocking signal frequency) are the combined frequencies from i), ii) and iii) below:- i) The total frequency range formed by:- R-GSM 900 the frequencies between Flo + (IF1 + IF2 + ... + IFn + 19,5 MHz) and Flo - (IF1 + IF2 + ... + IFn + 19,5 MHz). ER-GSM 900 the frequencies between Flo + (IF1 + IF2 + ... + IFn + 21,0 MHz) and Flo - (IF1 + IF2 + ... + IFn + 21,0 MHz). And the frequencies +100 MHz and -100 MHz from the edge of the relevant receive band.Measurements are made at 200 kHz intervals. ii) The three frequencies IF1, IF1 + 200 kHz, IF1 - 200 kHz. iii) The frequencies: mFlo + IF1; mFlo - IF1; mFR; where m is all positive integers greater than or equal to 2 such that either sum lies in the range 100 kHz to 12,75 GHz. The frequencies in step ii) and iii) lying in the range of frequencies defined by step i) above need not be repeated. Where: Flo - local oscillator applied to first receiver mixer IF1 ... IFn - are the n intermediate frequencies Flo, IF1, IF2 ... IFn - shall be declared by the manufacturer in the PIXIT statement 3GPP TS 51.010-1 annex 3. d) The level of the unwanted signal is set according to table 14-28b. Table 14-28b: Level of unwanted signals for R-GSM or ER-GSM 900 MS R-GSM 900 ER-GSM 900 Small MS Other MS Small MS Other MS FREQUENCY LEVEL IN dBVemf( ) LEVEL IN dBVemf( ) FR ±600 kHz to FR ±800 kHz 70 75 70 75 FR ±800 kHz to FR ±1,6 MHz 70 80 70 80 FR ±1,6 MHz to FR ±3 MHz 80 90 80 90 915 MHz to FR - 3 MHz 90 90 90 90 FR + 3 MHz to 980 MHz 90 90 90 90 1 785 MHz to FR - 3 MHz - - - - FR + 3 MHz to 1 920 MHz - - - - 835 MHz to < 876 MHz 113 113 - - 835 MHz to < 873 MHz - - 113 113 876 MHz to 880 MHz 106 113 - - 873 MHz to 880 MHz - - 106 113 880 MHz to 915 MHz 106 108 - - 880 MHz to 912 MHz - - 106 108 912 MHz to 915 MHz - - 99 101 > 980 MHz to 1 000 MHz 113 113 113 113 100 kHz to < 835 MHz 90 90 90 90 > 1 000 MHz to 12,75 GHz 90 90 90 90 NOTE: These values differ from 3GPP TS 05.05 because of practical generator limits in the SS. e) The SS compares the data of the signal that it sends to the MS with the signal which is looped back from the receiver after demodulation and decoding, and checks the frame erasure indication. The SS tests the RBER compliance for the bits of class II, by examining sequences of at least the minimum number of samples of consecutive bits of class II, where bits are taken only from those frames for which no bad frame indication was given. The number of error events is recorded. If a failure is indicated it is noted and counted towards the allowed exemption totals. In the case of failures discovered at the predicted frequencies at steps f ii), iii) or iv) the test is repeated on the adjacent channels ±200 kHz away. If either of these two frequencies fail then the next channel 200 kHz beyond is also tested. This process is repeated until all channels constituting the group of failures is known.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.7.3.5 Test requirements	The error rate measured in this test shall not exceed the test limit error rate values given in table 14-29b. This shall apply under normal test voltage and ambient temperature, and with the interfering signal at any frequency in the range specified. Table 14-29b: Limits for blocking Channel Type of measurement Test limit error rate % Minimum number of samples TCH/FS Class II RBER 2,439 8 200 The following exceptions are allowed: R-GSM 900 or ER-GSM: A maximum of six failures in the frequency band 915 MHz to 980 MHz (which, if grouped, shall not exceed three 200 kHz channels per group). A maximum of 24 failures in the combined bands 100 kHz to 915 MHz and 980 MHz to 12,75 GHz (which, if below FR and grouped, shall not exceed three 200 kHz channels per group). If the number of failures do not exceed the maximum allowed figures stated above, the test of 14.7.3.4 is repeated at the frequencies at which the failures occurred. The level of the unwanted signal is set to 70 dBVemf( ) and the performance requirement is once again that that stated in the table above. The number Error rate measured in this test shall not exceed the test limit error rate values given in table 14-29b. No failures are allowed at this lower unwanted signal level.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.7.4 Blocking and spurious response - control channels for MS supporting the R-GSM or ER-GSM 900 band
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.7.4.1 Definition	Blocking is a measure of the ability of the receiver to receive a modulated wanted input signal in the presence of an unwanted input signal, on frequencies other than those of the spurious responses or the adjacent channels, without exceeding a given degradation.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.7.4.2 Conformance requirement	1. The blocking characteristics of the receiver are specified separately for in-band and out-of-band performance as identified in 3GPP TS 05.05 subclause 5.1. The reference sensitivity performance as specified in table 1 of 3GPP TS 05.05 shall be met when the following signals are simultaneously input to the receiver: - a useful signal at frequency f0, 3 dB above the reference sensitivity level as specified in 3GPP TS 05.05 subclause 6.2; - a continuous, static sine wave signal at a level as in the table of 3GPP TS 05.05 subclause 5.1 and at a frequency (f) which is an integer multiple of 200 kHz. With the following exceptions, called spurious response frequencies:- a) R-GSM or ER-GSM: in band, for a maximum of six occurrences (which if grouped shall not exceed three contiguous occurrences per group); b) out of band, for a maximum of 24 occurrences (which if below f0 and grouped shall not exceed three contiguous occurrences per group). Where the above performance shall be met when the continuous sine wave signal (f) is set to a level of 70 dBµV (emf) (i.e. -43 dBm). 3GPP TS 05.05, subclause 5.1.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.7.4.3 Test purpose	1. To verify that the in band blocking performance is met without exceeding the total number of allowed in band spurious responses. An allowance is made for the statistical significance of the test. 2. To verify that at selected out of band frequencies, the out of band blocking performance is met without exceeding the total number of allowed out of band spurious responses. An allowance is made for the statistical significance of the test. NOTE: Not all of the possible out of band frequencies are tested as this results in excessive test time. However, the total number of out of band spurious responses, specified in 3GPP TS 05.05, are allowed to ensure a fair test of the MS.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.7.4.4 Method of test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.7.4.4.1 Initial conditions	A call is set up according to the generic call set up procedure, except the BCCH frequency list shall be empty, on a TCH with an arbitrary ARFCN in the range supported by the MS. The power control level is set to maximum power. The ARFCN of the BCCH shall be the same - or at an offset of +/- 2 channels, than that of the ARFCN for the TCH. The SS transmits Standard Test Signal C1 on the traffic channel. (TCH frequency FR).
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.7.4.4.2 Procedure	a) The SS sends a Layer 3 message which does not require a Layer 3 response from the MS. Due to interfering signals, the MS may not be able to acknowledge the Layer 2 frame. Frame erasures are indicated by repeated L2 frames. b) The SS is set to produce a TUhigh wanted signal and a static interfering signal at the same time. The SS sets the amplitude of the wanted signal to 4 dB above the reference sensitivity level. c) The unwanted signal is a C.W. signal (Standard test signal IO) of frequency FB. It is applied in turn on the subset of frequencies calculated at step f) in the overall range 100 kHz to 12,75 GHz, where FB is an integer multiple of 200 kHz. However, frequencies in the range FR ±600 kHz are excluded. NOTE: Allowance must be made for possible spurious signals arising from the SS. These are particularly likely at sub harmonic frequencies nFB where n = 2, 3, 4, 5, etc. d) The frequencies at which the test is performed (adjusted to an integer multiple of 200 kHz channels most closely approximating the absolute frequency of the calculated blocking signal frequency) are the combined frequencies from i), ii) and iii) which follow: i) The total frequency range formed by:- R-GSM 900 the frequencies between Flo + (IF1 + IF2 + ... + IFn + 19,5 MHz) and Flo - (IF1 + IF2 + ... + IFn + 19,5 MHz) - ER-GSM 900 the frequencies between Flo + (IF1 + IF2 + ... + IFn + 21,0 MHz) and Flo - (IF1 + IF2 + ... + IFn + 21,0 MHz) and the frequencies +100 MHz and -100 MHz from the edge of the relevant receive band. Measurement are made at 200 kHz intervals. ii) The three frequencies IF1, IF1 + 200 kHz, IF1 - 200 kHz. iii) The frequencies: mFlo + IF1; mFlo - IF1; mFR; where m is all positive integers greater than or equal to 2 such that either sum lies in the range 100 kHz to 12,75 GHz. The frequencies in step ii) and iii) lying in the range of frequencies defined by step i) above need not be repeated. Where: Flo - local oscillator applied to first receiver mixer IF1 ... IFn - are the n intermediate frequencies Flo, IF1, IF2 ... IFn - shall be declared by the manufacturer in the PIXIT statement 3GPP TS 51.010-1 annex 3. e) The level of the unwanted signal is set according to table 14-30b. Table 14-30b: Level of unwanted signals R-GSM 900 ER-GSM 900 Small MS Other MS Small MS Other MS FREQUENCY LEVEL IN dBVemf( ) LEVEL IN dBVemf( ) FR ±600 kHz to FR ±800 kHz 70 75 70 75 FR ±800 kHz to FR ±1,6 MHz 70 80 70 80 FR ±1,6 MHz to FR ±3 MHz 80 90 80 90 915 MHz to FR - 3 MHz 90 90 90 90 FR + 3 MHz to 980 MHz 90 90 90 90 1 785 MHz to FR - 3 MHz - - - - FR + 3 MHz to 1 920 MHz - - - - 835 MHz to < 876 MHz 113 113 - - 835 MHz to < 873 MHz - - 113 113 876 MHz to 880 MHz 106 113 - - 873 MHz to 880 MHz - - 106 113 880 MHz to 915 MHz 106 108 - - 880 MHz to 912 MHz - - 106 108 912 MHz to 915 MHz - - 99 101 > 980 MHz to 1 000 MHz 113 113 113 113 100 kHz to < 835 MHz 90 90 90 90 > 1 000 MHz to 12,75 GHz 90 90 90 90 NOTE: These values differ from 3GPP TS 05.05 because of practical generator limits in the SS. f) The SS determines the number of frame erasure events during at least the minimum number of samples. If a failure is indicated, it is noted and counted towards the allowed exemption total. In the case of failures discovered at the predicted frequencies at steps f ii), iii) or iv) the test is repeated on the adjacent channels ±200 kHz away. If either of these two frequencies fail then the next channel 200 kHz beyond is also be tested. This process is repeated until all channels constituting the group of failures is known.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.7.4.5 Test requirements	The error rate measured in this test shall not exceed the test limit error rate given in table 14-31b. This shall apply under normal test voltage and ambient temperature, and with the interfering signal at any frequency in the range specified. Table 14-31b: Limits for blocking GSM 900 DCS 1 800 Channel Type of measurement Test limit error rate Minimum No. of samples Test limit error rate Minimum No. of samples FACCH/F FER 8,961 6 696 4,368 13 736 The following exceptions are allowed: R-GSM or ER-GSM: A maximum of six failures in the band 915 MHz to 980 MHz (which, if grouped, shall not exceed three 200 kHz channels per group). A maximum of 24 in the combined bands 100 kHz to 915 MHz and 980 MHz to 12,75 GHz (which, if below FR and grouped, shall not exceed three 200 kHz channels per group). If the number of failures do not exceed the maximum allowed figures stated above, the test of 14.7.4.4 is repeated at the frequencies at which the failures occurred. The level of the unwanted signal is set to 70 dBVemf( ) and the performance requirement is once again that stated above. The number of Error Events recorded in this test shall not exceed the test limit error rate values given above, when using the maximum number of samples. No failures are allowed at this lower unwanted signal level.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8 AM suppression
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.1 AM suppression - speech channels
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.1.1 Definition	AM suppression is a measure of the ability of the receiver to receive a modulated wanted input signal in the presence of an unwanted TDMA modulated interferer.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.1.2 Conformance requirement	The reference sensitivity performance as specified in table 1 shall be met when the following signals are simultaneously input to the receiver: - a useful signal at frequency f0, 3 dB above the reference sensitivity level as specified in 3GPP TS 05.05 subclause 5.2. - a single frequency (f), in the relevant receive band, \|f - f0\| > 6MHz, which is an integer multiple of 200 kHz, a GSM TDMA signal modulated by any 148-bits subsequence of the 511-bits pseudo random bit sequence, defined in ITU-T Recommendation O.153 fascicle IV.4, at a level as defined in the table below. The interferer shall have one timeslot active and the frequency shall be at least 2 channels separated from any identified spurious responses. The transmitted bursts shall be synchronized to but, delayed in time between 61 and 86 bit periods relative to the bursts of the wanted signal. 3GPP TS 05.05, subclause 5.2. MS type Signal level GSM 400 -31 dBm GSM 700 -31 dBm GSM 850 -31 dBm GSM 900 -31 dBm DCS 1 800 -29 / -31 dBm (note) PCS 1 900 -31 dBm NOTE: The –31 dBm level shall apply to DCS 1 800 class 1 and class 2 MS meeting the –102 dBm reference sensitivity level requirement according to 3GPP TS 05.05, subclause 6.2. 3GPP TS 45.05 subclause 2: For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.1.3 Test purpose	To verify that the AM suppression performance of the MS meets the conformance requirement with an allowance for the statistical significance of the test.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.1.4 Method of test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.1.4.1 Initial conditions	A call is set up according to the generic call set up procedure, on a TCH/FS with an ARFCN in the mid ARFCN range. The power control level is set to maximum power. The SS transmits standard Test Signal C1 on the traffic channel (TCH frequency FR). The SS commands the MS to create traffic channel loop back signalling erased frames. This test is performed after test 14.7.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.1.4.2 Procedure	a) The SS produces a static wanted signal with an amplitude 4 dB above reference sensitivity level. b) The SS produces an interfering signal as described below: - static fading profile; - at an in band frequency greater than 6 MHz separated from FR and separated by at least two ARFCNs from any spurious responses. NOTE: Spurious responses are identified by test cases 14.7.1 and 14.7.2. - at a level as described in table 14-32. - GSM TDMA modulated by random data with one timeslot active. - synchronized to, but delayed between 61 and 86 bit periods to the bursts of the wanted signal. Table 14-32: Interferer signal level MS type Signal level (dBVemf) GSM 400 82 GSM 700 82 T-GSM 810 82 GSM 850 82 GSM 900 82 DCS 1 800 82/84 PCS 1 900 82 NOTE: The 82 dBVemf (i.e. -31 dBm) level shall apply to DCS 1 800 class 1 and class 2 MS meeting the ‑102 dBm reference sensitivity level requirement according to 3GPP TS 05.05, subclause 6.2. c) The SS compares the data of the signal that it sends to the MS with the signal which is looped back from the receiver after demodulation and decoding, and checks the frame erasure indication. d) The SS tests the RBER compliance of class II bits by examining at least the minimum number of samples of consecutive bits. Bits only taken from those frames which do not signal frame erasure. The number of error events is recorded.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.1.5 Test requirements	The error rates measured in this test shall not exceed the test limit error rate values given in table 14.27. Table 14-33: Limits for AM suppression Channel Propagation conditions Type of measurement Test limit error rate % Minimum No. of samples TCH/FS Class II Static RBER 2,439 8 200
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.2 AM suppression - control channels
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.2.1 Definition	AM suppression is a measure of the ability of the receiver to receive a modulated wanted input signal in the presence of an unwanted TDMA modulated interferer.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.2.2 Conformance requirement	The reference sensitivity performance as specified in table 1 shall be met when the following signals are simultaneously input to the receiver: - a useful signal at frequency f0, 3 dB above the reference sensitivity level as specified in 3GPP TS 05.05 subclause 5.2. - a single frequency (f), in the relevant receive band, \|f - f0\| > 6MHz, which is an integer multiple of 200 kHz, a GSM TDMA signal modulated by any 148-bits subsequence of the 511-bits pseudo random bit sequence, defined in ITU-T Recommendation O.153 fascicle IV.4, at a level as defined in the table below. The interferer shall have one timeslot active and the frequency shall be at least 2 channels separated from any identified spurious responses. The transmitted bursts shall be synchronized to but, delayed in time between 61 and 86 bit periods relative to the bursts of the wanted signal. 3GPP TS 05.05, subclause 5.2. MS type Signal level GSM 400 -31 dBm GSM 700 -31 dBm GSM 850 -31 dBm GSM 900 -31 dBm DCS 1 800 -29 / -31 dBm (note) PCS 1 900 -31 dBm NOTE: The –31 dBm level shall apply to DCS 1 800 class 1 and class 2 MS meeting the –102 dBm reference sensitivity level requirement according to 3GPP TS 05.05, subclause 6.2. 3GPP TS 45.05 subclause 2: For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.2.3 Test purpose	To verify that the AM suppression performance of the MS meets the conformance requirement with an allowance for the statistical significance of the test.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.2.4 Method of test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.2.4.1 Initial conditions	A call is set up according to the generic call set up procedure, on a TCH with an ARFCN in the mid ARFCN range. The power control level is set to maximum power. The SS transmits standard Test Signal C1 on the traffic channel (TCH frequency FR). This test is performed after test 14.7.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.2.4.2 Procedure	a) The SS produces a TUhigh wanted signal with an amplitude 4 dB above reference sensitivity level. b) The SS produces an interfering signal as described below: - static fading profile; - t an in band frequency greater than 6 MHz separated from FR and separated by at least two ARFCNs from any spurious responses. NOTE: Spurious responses are identified by test cases 14.7.1 and 14.7.2. - at a level as described in table 14-34. - GSM TDMA modulated by random data with one timeslot active. - synchronized to, but delayed between 61 and 86 bit periods to the bursts of the wanted signal. Table 14-34: Interferer signal level MS type Signal level (dBVemf) GSM 400 82 GSM 700 82 T-GSM 810 82 GSM 850 82 GSM 900 82 DCS 1 800 82/84 PCS 1 900 82 NOTE: The 82 dBVemf (i.e. –31 dBm) level shall apply to DCS 1 800 class 1 and class 2 MS meeting the –102 dBm reference sensitivity level requirement according to 3GPP TS 05.05, subclause 6.2. c) The SS sends the status message. Due to interfering signals, the MS may not be able acknowledge the Layer 2 frame. Frame erasures are indicated by repeated L2 frames. d) The SS determines the number of frame erasure events during at least the minimum number of samples. If a failure is indicated, it is noted and counted towards the allowed exemption total.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.2.5 Test requirements	The error rates measured in this test shall not exceed the test limit error rate values given in table 14.35. Table 14-35: Limits for AM suppression GSM 400, GSM 700, T-GSM 810, GSM 850 and GSM 900 DCS 1 800 and PCS 1 900 Channel Propagation conditions Type of measurement Test limit error rate % Minimum No. of max-samples Test limit error rate % Min No. of max-samples FACCH/F TUhigh/No FH FER 8,961 6 696 4,368 13 736
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.3 AM suppression - packet channels
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.3.1 Definition	AM suppression is a measure of the ability of the receiver to receive a modulated wanted input signal in the presence of an unwanted TDMA modulated interferer.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.3.2 Conformance requirement	The reference sensitivity performance as specified in tables 1, 1a, 1c and 1e, adjusted by the correction factors of table 6.2-4, shall be met when the following signals are simultaneously input to the receiver. - A useful signal, modulated with the relevant supported modulation (GMSK or 8-PSK) and symbol rate, at frequency fo, 3 dB above the reference sensitivity level or input level for reference performance, whichever applicable, as specified in sub clause 6.2 - A single frequency (f), in the relevant receive band, \|f - f0\| > 6MHz, which is an integer multiple of 200 kHz, a GSM TDMA signal modulated by any 148-bits subsequence of the 511-bits pseudo random bit sequence, defined in ITU-T Recommendation O.153 fascicle IV.4, at a level as defined in the table below. The interferer shall have one timeslot active and the frequency shall be at least 2 channels separated from any identified spurious responses. The transmitted bursts shall be synchronized to but, delayed in time between 61 and 86 bit periods relative to the bursts of the wanted signal. MS type Signal level GSM 400 -31 dBm GSM 700 -31 dBm GSM 850 -31 dBm GSM 900 -31 dBm DCS 1 800 -29 / -31 dBm (note) PCS 1 900 -31 dBm NOTE: The –31 dBm level shall apply to DCS 1 800 class 1 and class 2 MS meeting the –102 dBm reference sensitivity level requirement according to 3GPP TS 45.005, subclause 6.2. 3GPP TS 45.005, subclause 5.2 The block error rate (BLER) performance for PDTCH/MCS5 to 9 shall not exceed 10 % or 30 % depending on Coding Schemes. The block error rate (BLER) performance for USF/MCS5 shall not exceed 1 %. For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists. 3GPP TS 45.005 subclause 6.2
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.3.3 Test purpose	To verify that the AM suppression performance of the MS meets the conformance requirements with an allowance for the statistical significance of the test.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.3.4 Method of test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.3.4.1 Initial conditions	For 8-PSK modulation a downlink TBF is set up according to the generic procedure specified in clause 50 for packet switched with an ARFCN in the Mid ARFCN range, power control level set to maximum. The power control parameter ALPHA (α) is set to 0. The MCS is set to MCS-5 and the SS shall transmit on the maximum number of receive timeslots. For the USF BLER parts of the test case the test mode defined in GSM Rec. 4.14 (para 5.4) will be used for uplink TBF. If the MS is capable of both: Mode (a) transmitting pseudo-random data sequence in RLC data blocks Mode (b) transmitting looped-back RLC data blocks then Mode (a) will be used. If Mode (b) is used then the SS sends the pseudo-random data sequence specified for Mode (a) on the downlink for loopback on the uplink. The SS transmits EGPRS RLC data blocks containing random data. This test is performed after test 14.18.5.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.3.4.2 Procedure	a) The SS produces a static wanted signal with an amplitude 4 dB above reference sensitivity level according 3GPP 45.005 table 1c. b) The SS produces an interfering signal as described below: - static fading profile; - at an in band frequency greater than 6 MHz separated from FR and separated by at least two ARFCNs from any spurious responses. NOTE: Spurious responses are identified by test case 14.18.5. - at a level as described in table 14.8.3-1. - GSM TDMA modulated by random data with one timeslot active. - synchronized to, but delayed between 61 and 86 bit periods to the bursts of the wanted signal. Table 14.8.3-1: Interferer signal level MS type Signal level (dBVemf) GSM 400 82 GSM 700 82 T-GSM 810 82 GSM 850 82 GSM 900 82 DCS 1 800 82/84 PCS 1 900 82 NOTE: The 82 dBVemf (i.e. -31 dBm) level shall apply to DCS 1 800 class 1 and class 2 MS meeting the ‑102 dBm reference sensitivity level requirement according to 3GPP TS 05.05, subclause 6.2. c) The SS counts the number of blocks transmitted with current coding scheme and the number of these blocks not acknowledged based on the content of the Ack/Nack Description information element (see 04.60, 12.3) in the Packet Downlink Ack/Nack as sent from the MS to the SS on the PACCH. d) The SS sets the value of the USF/MCS-5 according 3GPP 45.005 table 1c. e) The SS counts the number of times the USF is allocated to the MS, and the number of times the MS does not transmit while being allocated the uplink. NOTE: Due to the error rates related to the USF, the MS is likely to occasionally miss its USF for transmitting the Packet Downlink Ack/Nack. As this requirement is not verified in this part of the test, the SS then again assigns uplink resources so the MS can sent this message.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.8.3.5 Test requirements	The error rates measured in this test shall not exceed the test limit error rate values given in table 14.8.3-2. Table 14.8.3-2: Limits for AM suppression Channel Propagation conditions Type of measurement Test limit error rate % Minimum No. of samples MCS-5 Static BLER 10 2000 USF/MCS-5 Static BLER 1 20 000
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.9 Paging performance at high input levels
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.9.1 Definition	The paging performance at high input levels is the signal level at the MS receiver input at which a certain FER for the PCH must be achieved.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.9.2 Conformance requirement	The paging performance at high input levels requirements of 3GPP TS 05.05 subclause 6.5 a) for PCH under static propagation conditions shall be met from 20 dB above reference sensitivity level up to -15 dBm for GSM 400, GSM 700, GSM 850 and GSM 900 and -23 dBm for DCS 1 800 and PCS 1 900. 3GPP TS 45.05 subclause 2: For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.9.3 Test purpose	To verify that the MS does not exceed the conformance requirement with an allowance for the statistical significance of the test.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.9.4 Method of test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.9.4.1 Initial conditions	System Simulator: 1 cell, Tx-Integer = 3, MAX RETRANS is set to minimum. The CCCH is combined with SDCCH. BS_PA_MFRMS = 9 to achieve worst case sleep mode (DRX). The signal level at the receiver input is set to: GSM 400: -15 dBm; GSM 700: -15 dBm; GSM 850: -15 dBm; T-GSM 810: -15 dBm; GSM 900: -15 dBm; DCS 1800: -23 dBm; PCS 1 900: -23 dBm. Mobile Station: The MS has a valid TMSI. It is "idle updated". The MS should have been powered up immediately before running the test, i.e. if a Location update is necessary the MS must be switched off and on again.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.9.4.2 Procedure	The MS is paged and the SS starts timer T3113. If a CHANNEL REQUEST is received before expiry of T3113 the SS sends an IMMEDIATE ASSIGNMENT REJECT. The sequence is performed 4 times. Between two consecutive executions the SS must wait for an amount of time which is enough to guarantee that the MS is in service (listening to its paging subchannel).
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.9.5 Test requirements	If the MS answers all pagings with a CHANNEL REQUEST the requirements are met. NOTE: The probability for a good MS to fail this test is less than 1 %.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10 Performance of the Codec Mode Request Generation for Adaptive Multi-Rate Codecs
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.1 Performance of the Codec Mode Request Generation – TCH/AFS
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.1.1 Definition	When a traffic channel supporting an Adaptive Multi-Rate speech codec is activated, the Codec Mode Request is sent by MS in band every other speech frame to indicate to the Network the recommended codec mode of the ACS to use on the downlink.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.1.2 Conformance Requirement	For TULow channel conditions with ideal frequency hopping without DTX activated, the MS shall produce Codec Mode Requests with the following accuracy: Requirement 1: When a carrier to interferer ratio 4 dB higher than a defined upper threshold is applied to the antenna connector, the MS shall request a higher mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. Requirement 2: When a carrier to interferer ratio 4 dB lower than a defined lower threshold is applied to the antenna connector, the MS shall request a lower mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. If required, the above test levels shall be reduced by the fixed normalization factor defined in sub-clause 3.3.1 of TS 45.009 to account for potential improved receiver performances. NOTE: Ideal frequency hopping assumes perfect decorrelation between bursts. For the propagation profile TU3, this is not easily achievable due to the high number of hopping frequencies required. Therefore, performance tests should be performed under ideal frequency hopping conditions for the following propagation profiles: TU50 for GSM900 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700. 3GPP TS 45.05 subclause 2: For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.1.3 Test Purpose	1. To verify that the MS does not exceed conformance requirement 1 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 2. To verify that the MS does not exceed conformance requirement 2 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 3. To implicitly verify the correct implementation of the AMR Thresholds and Hysteresis parameters received in either an ASSIGNMENT COMMAND or MODE MODIFY procedure, or through an AMR_CONFIG_REQ or THRESH_REQ message carried in a RATSCCH. NOTE: This would normally be performed as a signalling test, however due to the complex layer 1 requirements it is verified here. Any future modification or Change Request on this section should take into account this additional test objective.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.1.4 Method of Test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.1.4.1 Initial conditions	A call is set up according to the generic call set up procedure on a TCH/AFS with a hopping pattern in the Mid ARFCN range and covering at least 10 frequencies not exceeding 5 MHz. DTX shall not be activated. Power control level shall be set to maximum power. The initial configuration indicates the use of the 12.2 mode of AMR only. The SS transmits Standard Test Signal C1 on the traffic channel. In addition to the wanted signal, the SS produces an independent, uncorrelated interfering signal, Standard Test Signal I1 (unwanted signal). - The unwanted signal is continuous and has no fixed relationship with the bit transitions of the wanted signal. Initially, the unwanted signal is switched off. - The fading characteristic of the wanted and the interfering signal is TUHigh. NOTE 1: The fading characteristics shall be TU50 for GSM900, T-GSM 810 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700. Specific PICS Statements: - PIXIT Statements: - AMR C/I normalization factor.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.1.4.2 Procedure	INITIAL CONFIG: 1a) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AFS in kbit/s CODEC_MODE_4 10,2 CODEC_MODE_3 7.4 CODEC_MODE_2 6,7 CODEC_MODE_1 5,15 With Initial Codec Mode unspecified, thus the default ICM rule being used and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_4 Thr1d = 17.5 dB +  CODEC_MODE_3 Thr2d = 14.5 dB Thr1u = 19.5 dB CODEC_MODE_2 Thr3d = 12.5 dB Thr2u = 16.5 dB CODEC_MODE_1   Thr3u = 14.5 dB The SS uses the expected Initial Codec Mode (default rule) after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode (default rule). 1b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AFS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 12.5 dB +  CODEC_MODE_2 Thr2d = 6.5 dB Thr1u = 14.5 dB CODEC_MODE_1   Thr2u = 8.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms. 1c) The downlink radio environment is altered so that the carrier to interference ratio is reduced to 4 dB below the highest of the downwards thresholds Thr1d. The SS increments the counter for ‘C/I decreases below thresholds’. 1d) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1e) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 1f) The downlink radio environment is altered so that the carrier to interference ratio is reduced to 4 dB below the lowest of the downwards thresholds Thr2d. The SS increments the counter for ‘C/I decreases below thresholds’. 1g) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 4.75 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1h) The SS switches the downlink codec mode to 4.75 kbit/s and waits for 0.5s. 1i) The downlink radio environment is altered so that the carrier to interference ratio is increased to 4 dB above the lowest of the upwards thresholds Thr2u. The SS increments the counter for ‘C/I increases above thresholds’. 1j) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1k) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 1l) The downlink radio environment is altered so that the carrier to interference ratio is increased to 4 dB above the highest of the upwards thresholds Thr1u. The SS increments the counter for ‘C/I increases above thresholds’. 1m) The SS checks the CMR received by the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 12.2 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1n) The SS switches the downlink codec mode to 12.2 kbit/s and waits for 0.5s. 1o) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 2: 2a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AFS in kbit/s CODEC_MODE_4 10,2 CODEC_MODE_3 7.4 CODEC_MODE_2 6,7 CODEC_MODE_1 5,15 With the Initial Codec Mode set to any mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_4 Thr1d = 17.5 dB +  CODEC_MODE_3 Thr2d = 14.5 dB Thr1u = 19.5 dB CODEC_MODE_2 Thr3d = 12.5 dB Thr2u = 16.5 dB CODEC_MODE_1   Thr3u = 14.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. 2b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AFS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 11.5 dB +  CODEC_MODE_2 Thr2d = 5.5 dB Thr1u = 13.5 dB CODEC_MODE_1   Thr2u = 7.5 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode. The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 2c) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 3: 3a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the AMR 7.95 kbit/s mode only: The SS switches the downlink codec to the 7.95 mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested codec. The SS waits for the MS to change the uplink codec to the expected codec, 12 frames after receiving the ACK_OK message. 3b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AFS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 18.5 dB +  CODEC_MODE_2 Thr2d = 10.5 dB Thr1u = 20.5 dB CODEC_MODE_1   Thr2u = 12.5 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. 3c) The SS then sends a THRESH_REQ through a RATSCCH message commanding the MS to modify the Thresholds and Hysteresis to the following values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 13.5 dB +  CODEC_MODE_2 Thr2d = 7.5 dB Thr1u = 15.5 dB CODEC_MODE_1   Thr2u = 9.5 dB The SS waits 12 frames after receiving the ACK_OK message. 3d) The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 3e) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 4: 4a) The unwanted signal is removed. The SS uses a Channel Mode Modify procedure commanding the MS to use the AMR 10.2 kbit/s mode only: The SS waits for the MS to change the uplink codec to the 10.2 kbit/s mode. 4b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AFS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 12.5 dB +  CODEC_MODE_2 Thr2d = 6.5 dB Thr1u = 14.5 dB CODEC_MODE_1   Thr2u = 8.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 4c) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. NOTE: The core specifications state that an MS shall respond to a change of C/I within 200ms. The core specifications place no bounds on magnitude or rate of change of C/I. For this test the magnitude of change is bounded by THRESH and HYST selection, and the rate of change is bounded by the 500ms wait periods. These bounds are selected to ensure an MS implementation is not adversely biased by this test. Maximum/Minimum Duration of Test Maximum/minimum: 54 minutes (GSM850, GSM900, DCS1800, PCS1900).
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.1.5 Test requirements	The requirement and minimum set of samples shall not exceed the values given in the following table for each set of thresholds. Event Maximum allowed error rate Minimum No. of samples C/I increases over Thresholds 11% 2000 C/I decreases below Thresholds 11% 2000 NOTE: The maximum allowed error rates for the C/I thresholds are derived from the average of the C/I event counters in Step 1 to Step 4 of the method of test.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.2 Performance of the Codec Mode Request Generation – TCH/AHS
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.2.1 Definition	When a traffic channel supporting an Adaptive Multi-Rate speech codec is activated, the Codec Mode Request is sent by MS in band every other speech frame to indicate to the Network the recommended codec mode of the ACS to use on the downlink.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.2.2 Conformance Requirement	For TULow channel conditions with ideal frequency hopping without DTX activated, the MS shall produce Codec Mode Requests with the following accuracy: Requirement 1: When a carrier to interferer ratio 4 dB higher than a defined upper threshold is applied to the antenna connector, the MS shall request a higher mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. Requirement 2: When a carrier to interferer ratio 4 dB lower than a defined lower threshold is applied to the antenna connector, the MS shall request a lower mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. If required, the above test levels shall be reduced by the fixed normalization factor defined in sub-clause 3.3.1 of TS 45.009 to account for potential improved receiver performances. NOTE: Ideal frequency hopping assumes perfect decorrelation between bursts. For the propagation profile TU3, this is not easily achievable due to the high number of hopping frequencies required. Therefore, performance tests should be performed under ideal frequency hopping conditions for the following propagation profiles: TU50 for GSM900 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700. 3GPP TS 45.05 subclause 2: For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.2.3 Test Purpose	1. To verify that the MS does not exceed conformance requirement 1 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 2. To verify that the MS does not exceed conformance requirement 2 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 3. To implicitly verify the correct implementation of the AMR Thresholds and Hysteresis parameters received in ether an ASSIGNMENT COMMAND or MODE MODIFY procedure, or through an AMR_CONFIG_REQ or and in a AMR_CONFIG_REQ message carried in a RATSCCH. NOTE: This would normally be performed as a signalling test, however due to the complex layer 1 requirements it is verified here. Any future modification or Change Request on this section should take into account this additional test objective.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.2.4 Method of Test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.2.4.1 Initial conditions	A call is set up according to the generic call set up procedure on a TCH/AHS with a hopping pattern in the Mid ARFCN range and covering at least 10 frequencies not exceeding 5 MHz. DTX shall not be activated. Power control level shall be set to maximum power. The initial configuration indicates the use of the 7.95 mode of AMR only. The SS transmits Standard Test Signal C1 on the traffic channel. In addition to the wanted signal, the SS produces an independent, uncorrelated interfering signal, Standard Test Signal I1 (unwanted signal). - The unwanted signal is continuous and has no fixed relationship with the bit transitions of the wanted signal. Initially, the unwanted signal is switched off. - The fading characteristic of the wanted and the interfering signal is TUHigh. NOTE 1: The fading characteristics shall be TU50 for GSM900, T-GSM 810 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700. Specific PICS Statements: - PIXIT Statements: - AMR C/I normalization factor.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.2.4.2 Procedure	INITIAL CONFIG: 1a) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AHS in kbit/s CODEC_MODE_4 7.4 CODEC_MODE_3 6.7 CODEC_MODE_2 5.15 CODEC_MODE_1 4.75 With Initial Codec Mode unspecified, thus the default ICM rule being used and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_4 Thr1d = 17.5 dB +  CODEC_MODE_3 Thr2d = 14.5 dB Thr1u = 19.5 dB CODEC_MODE_2 Thr3d = 12.5 dB Thr2u = 16.5 dB CODEC_MODE_1   Thr3u = 14.5 dB The SS uses the expected Initial Codec Mode (default rule) after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode (default rule). 1b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AHS in kbit/s CODEC_MODE_3 7.95 CODEC_MODE_2 6.7 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 7.95 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 14.0 dB +  CODEC_MODE_2 Thr2d = 10.0 dB Thr1u = 16.0 dB CODEC_MODE_1   Thr2u = 12.0 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 7.95 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 1 second. 1c) The downlink radio environment is altered so that the carrier to interference ratio is reduced to 4 dB below the highest of the downwards thresholds Thr1d. The SS increments the counter for ‘C/I decreases below thresholds’. 1d) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.7 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1e) The SS switches the downlink codec mode to 6.7 kbit/s and waits for 0.5s. 1f) The downlink radio environment is altered so that the carrier to interference ratio is reduced to 4 dB below the lowest of the downwards thresholds Thr2d. The SS increments the counter for ‘C/I decreases below thresholds’. 1g) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 4.75 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1h) The SS switches the downlink codec mode to 4.75 kbit/s and waits for 0.5s. 1i) The downlink radio environment is altered so that the carrier to interference ratio is increased to 4 dB above the lowest of the upwards thresholds Thr2u. The SS increments the counter for ‘C/I increases above thresholds’. 1j) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.7 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1k) The SS switches the downlink codec mode to 6.7 kbit/s and waits for 0.5s. 1l) The downlink radio environment is altered so that the carrier to interference ratio is increased to 4 dB above the highest of the upwards thresholds Thr1u. The SS increments the counter for ‘C/I increases above thresholds’. 1m) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 7.95 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1n) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 1o) The SS repeat steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases samples have been recorded. STEP 2: 2a) The unwanted signal is removed. The SS then send an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AHS in kbit/s CODEC_MODE_4 7.4 CODEC_MODE_3 6.7 CODEC_MODE_2 5.15 CODEC_MODE_1 4.75 With the Initial Codec Mode set to any mode. and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_4 Thr1d = 17.5 dB +  CODEC_MODE_3 Thr2d = 14.5 dB Thr1u = 19.5 dB CODEC_MODE_2 Thr3d = 12.5 dB Thr2u = 16.5 dB CODEC_MODE_1   Thr3u = 14.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. 2b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AHS in kbit/s CODEC_MODE_3 7.95 CODEC_MODE_2 6.7 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 7.95 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 13.0 dB +  CODEC_MODE_2 Thr2d = 9 dB Thr1u = 15.0 dB CODEC_MODE_1   Thr2u = 11.0 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode. The SS waits until the MS indicates in the CMR that the 7.95 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 2c) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 3: 3a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the AMR 6.7 kbit/s mode only: The SS switches the downlink codec to the 6.7 mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested codec. The SS waits for the MS to change the uplink codec to the expected codec, 12 frames after receiving the ACK_OK message. 3b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AHS in kbit/s CODEC_MODE_3 7.95 CODEC_MODE_2 6.7 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 7.95 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 18.5 dB +  CODEC_MODE_2 Thr2d = 10.5 dB Thr1u = 20.5 dB CODEC_MODE_1   Thr2u = 12.5 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode The SS waits until the MS indicates in the CMR that the 7.95 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. 3c) The SS then sends a THRESH_REQ through a RATSCCH message commanding the MS to modify the Thresholds and Hysteresis to the following values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 15.0 dB +  CODEC_MODE_2 Thr2d = 11.0 dB Thr1u = 17.0 dB CODEC_MODE_1   Thr2u = 13.0 dB The SS waits 12 frames after receiving the ACK_OK message. 3d) The SS waits until the MS indicates in the CMR that the 7.95 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 3e) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 4: 4a) The unwanted signal is removed. The SS uses a Channel Mode Modify procedure commanding the MS to use the AMR 5.15 kbit/s mode only: The SS waits for the MS to change the uplink codec to the 5.15 kbit/s mode. 4b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AHS in kbit/s CODEC_MODE_3 7.95 CODEC_MODE_2 6.7 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 7.95 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 14.0 dB +  CODEC_MODE_2 Thr2d = 10.0 dB Thr1u = 16.0 dB CODEC_MODE_1   Thr2u = 12.0 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 7.95 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 4c) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. NOTE: The core specifications state that an MS shall respond to a change of C/I within 200ms. The core specifications place no bounds on magnitude or rate of change of C/I. For this test the magnitude of change is bounded by THRESH and HYST selection, and the rate of change is bounded by the 500ms wait periods. These bounds are selected to ensure an MS implementation is not adversely biased by this test. Maximum/Minimum Duration of Test Maximum/minimum: 54 minutes (GSM850, GSM900, DCS1800, PCS1900).
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.2.5 Test requirements	The requirement and minimum set of samples shall not exceed the values given in the following table for each set of thresholds. Event Maximum allowed error rate Minimum No. of samples C/I increases over Thresholds 11% 2000 C/I decreases below Thresholds 11% 2000 NOTE: The maximum allowed error rates for the C/I thresholds are derived from the average of the C/I event counters in Step 1 to Step 4 of the method of test.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.3 Performance of the Codec Mode Request Generation – TCH/AFS - improved RX
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.3.1 Definition	When a traffic channel supporting an Adaptive Multi-Rate speech codec is activated, the Codec Mode Request is sent by MS in band every other speech frame to indicate to the Network the recommended codec mode of the ACS to use on the downlink.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.3.2 Conformance Requirement	For TULow channel conditions with ideal frequency hopping without DTX activated, the MS shall produce Codec Mode Requests with the following accuracy: Requirement 1: When a carrier to interferer ratio 4 dB higher than a defined upper threshold is applied to the antenna connector, the MS shall request a higher mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. Requirement 2: When a carrier to interferer ratio 4 dB lower than a defined lower threshold is applied to the antenna connector, the MS shall request a lower mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. The above test levels shall be reduced by the normalization factor defined in sub-clause 3.3.1 of TS 45.009 to account for improved receiver performances, specified in 14.10.3.4.1 below. NOTE: Ideal frequency hopping assumes perfect decorrelation between bursts. For the propagation profile TU3, this is not easily achievable due to the high number of hopping frequencies required. Therefore, performance tests should be performed under ideal frequency hopping conditions for the following propagation profiles: TU50 for GSM900 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700. 3GPP TS 45.05 subclause 2: For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.3.3 Test Purpose	1. To verify that the MS does not exceed conformance requirement 1 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 2. To verify that the MS does not exceed conformance requirement 2 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 3. To implicitly verify the correct implementation of the AMR Thresholds and Hysteresis parameters received in either an ASSIGNMENT COMMAND or MODE MODIFY procedure, or through an AMR_CONFIG_REQ or THRESH_REQ message carried in a RATSCCH. NOTE: This would normally be performed as a signalling test, however due to the complex layer 1 requirements it is verified here. Any future modification or Change Request on this section should take into account this additional test objective. NOTE: The C/I values used throughout this test have been carefully selected to ensure no values above 16dB are signalled, low C/I values will not conflict with the synchronisation requirements in TS 45.010, and also to ensure the C/I values are shared between upward and downward applications. Any future modification or Change Request on this section should take into account these aspects.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.3.4 Method of Test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.3.4.1 Initial conditions	A call is set up according to the generic call set up procedure on a TCH/AFS with a hopping pattern in the Mid ARFCN range and covering at least 10 frequencies not exceeding 5 MHz. DTX shall not be activated. Power control level shall be set to maximum power. The initial configuration indicates the use of the 12.2 mode of AMR only. The SS transmits Standard Test Signal C1 on the traffic channel. In addition to the wanted signal, the SS produces an independent, uncorrelated interfering signal, Standard Test Signal I1 (unwanted signal). - The unwanted signal is continuous and has no fixed relationship with the bit transitions of the wanted signal. Initially, the unwanted signal is switched off. - The fading characteristic of the wanted and the interfering signal is TUHigh. NOTE 1: The fading characteristics shall be TU50 for GSM900, T-GSM 810 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700. Specific PICS Statements: - PIXIT Statements: - AMR C/I normalization factors (AFS DARP) as follows: Required additional information PIXIT CI_NORM_AFS_DARP_2dB CI_NORM_AFS_DARP_3dB CI_NORM_AFS_DARP_4dB CI_NORM_AFS_DARP_6dB CI_NORM_AFS_DARP_8dB CI_NORM_AFS_DARP_10dB CI_NORM_AFS_DARP_11dB CI_NORM_AFS_DARP_12dB CI_NORM_AFS_DARP_14dB CI_NORM_AFS_DARP_17dB CI_NORM_AFS_DARP_19dB CI_NORM_AFS_DARP_20dB
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.3.4.2 Procedure	INITIAL CONFIG: 1a) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AFS in kbit/s CODEC_MODE_4 10,2 CODEC_MODE_3 7.4 CODEC_MODE_2 6,7 CODEC_MODE_1 5,15 With Initial Codec Mode unspecified, thus the default ICM rule being used and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_4 Thr1d = 17.5 dB +  CODEC_MODE_3 Thr2d = 14.5 dB Thr1u = 19.5 dB CODEC_MODE_2 Thr3d = 12.5 dB Thr2u = 16.5 dB CODEC_MODE_1   Thr3u = 14.5 dB The SS uses the expected Initial Codec Mode (default rule) after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode (default rule). 1b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AFS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 15.0 dB +  CODEC_MODE_2 Thr2d = 6.0 dB Thr1u = 15.0 dB CODEC_MODE_1   Thr2u = 6.0 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set Thr1u + 4dB - CI_NORM_AFS_DARP_19dB. The SS waits 500ms. 1c) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr1d – 4dB - CI_NORM_AFS_DARP_11dB. The SS increments the counter for ‘C/I decreases below thresholds’. 1d) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1e) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 1f) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr2d – 4dB - CI_NORM_AFS_DARP_2dB. The SS increments the counter for ‘C/I decreases below thresholds’. 1g) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 4.75 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1h) The SS switches the downlink codec mode to 4.75 kbit/s and waits for 0.5s. 1i) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr2u + 4dB - CI_NORM_AFS_DARP_10dB. The SS increments the counter for ‘C/I increases above thresholds’. 1j) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1k) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 1l) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr1u + 4dB - CI_NORM_AFS_DARP_19dB. The SS increments the counter for ‘C/I increases above thresholds’. 1m) The SS checks the CMR received by the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 12.2 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1n) The SS switches the downlink codec mode to 12.2 kbit/s and waits for 0.5s. 1o) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 2: 2a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AFS in kbit/s CODEC_MODE_4 10,2 CODEC_MODE_3 7.4 CODEC_MODE_2 6,7 CODEC_MODE_1 5,15 With the Initial Codec Mode set to any mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_4 Thr1d = 17.5 dB +  CODEC_MODE_3 Thr2d = 14.5 dB Thr1u = 19.5 dB CODEC_MODE_2 Thr3d = 12.5 dB Thr2u = 16.5 dB CODEC_MODE_1   Thr3u = 14.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. 2b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AFS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 12.0 dB +  CODEC_MODE_2 Thr2d = 8.0 dB Thr1u = 13.0 dB CODEC_MODE_1   Thr2u = 8.0 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode. The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to Thr1u + 4dB - CI_NORM_AFS_DARP_17dB. The SS waits 500ms 2c) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr1d – 4dB - CI_NORM_AFS_DARP_8dB. The SS increments the counter for ‘C/I decreases below thresholds’. 2d) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 2e) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 2f) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr2d – 4dB - CI_NORM_AFS_DARP_4dB. The SS increments the counter for ‘C/I decreases below thresholds’. 2g) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 4.75 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 2h) The SS switches the downlink codec mode to 4.75 kbit/s and waits for 0.5s. 2i) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr2u + 4dB - CI_NORM_AFS_DARP_12dB. The SS increments the counter for ‘C/I increases above thresholds’. 2j) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 2k) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 2l) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr1u + 4dB - CI_NORM_AFS_DARP_17dB. The SS increments the counter for ‘C/I increases above thresholds’. 2m) The SS checks the CMR received by the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 12.2 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 2n) The SS switches the downlink codec mode to 12.2 kbit/s and waits for 0.5s. 2o) The SS repeats steps 2c) to 2n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 3: 3a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the AMR 7.95 kbit/s mode only: The SS switches the downlink codec to the 7.95 mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested codec. The SS waits for the MS to change the uplink codec to the expected codec, 12 frames after receiving the ACK_OK message. 3b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AFS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 18.5 dB +  CODEC_MODE_2 Thr2d = 10.5 dB Thr1u = 20.5 dB CODEC_MODE_1   Thr2u = 12.5 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. 3c) The SS then sends a THRESH_REQ through a RATSCCH message commanding the MS to modify the Thresholds and Hysteresis to the following values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 14.0 dB +  CODEC_MODE_2 Thr2d = 10.0 dB Thr1u = 16.0 dB CODEC_MODE_1   Thr2u = 10.0 dB The SS waits 12 frames after receiving the ACK_OK message. 3d) The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to Thr1u + 4dB - CI_NORM_AFS_DARP_20dB. The SS waits 500ms 3e) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr1d – 4dB - CI_NORM_AFS_DARP_10dB. The SS increments the counter for ‘C/I decreases below thresholds’. 3f) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 3g) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 3h) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr2d – 4dB - CI_NORM_AFS_DARP_6dB. The SS increments the counter for ‘C/I decreases below thresholds’. 3i) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 4.75 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 3j) The SS switches the downlink codec mode to 4.75 kbit/s and waits for 0.5s. 3k) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr2u + 4dB - CI_NORM_AFS_DARP_14dB. The SS increments the counter for ‘C/I increases above thresholds’. 3l) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 3m) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 3n) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr1u + 4dB - CI_NORM_AFS_DARP_20dB. The SS increments the counter for ‘C/I increases above thresholds’. 3o) The SS checks the CMR received by the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 12.2 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 3p) The SS switches the downlink codec mode to 12.2 kbit/s and waits for 0.5s. 3q) The SS repeats steps 3e) to 3p) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 4: 4a) The unwanted signal is removed. The SS uses a Channel Mode Modify procedure commanding the MS to use the AMR 10.2 kbit/s mode only: The SS waits for the MS to change the uplink codec to the 10.2 kbit/s mode. 4b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AFS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 16.0 dB +  CODEC_MODE_2 Thr2d = 7.0 dB Thr1u = 16.0 dB CODEC_MODE_1   Thr2u = 7.0 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to Thr1u + 4dB - CI_NORM_AFS_DARP_20dB. The SS waits 500ms 4c) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr1d – 4dB - CI_NORM_AFS_DARP_12dB. The SS increments the counter for ‘C/I decreases below thresholds’. 4d) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 4e) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 4f) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr2d – 4dB - CI_NORM_AFS_DARP_3dB. The SS increments the counter for ‘C/I decreases below thresholds’. 4g) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 4.75 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 4h) The SS switches the downlink codec mode to 4.75 kbit/s and waits for 0.5s. 4i) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr2u + 4dB - CI_NORM_AFS_DARP_11dB. The SS increments the counter for ‘C/I increases above thresholds’. 4j) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 4k) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 4l) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr1u + 4dB - CI_NORM_AFS_DARP_20dB. The SS increments the counter for ‘C/I increases above thresholds’. 4m) The SS checks the CMR received by the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 12.2 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 4n) The SS switches the downlink codec mode to 12.2 kbit/s and waits for 0.5s. 4o) The SS repeats steps 4c) to 4n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. NOTE: The core specifications state that an MS shall respond to a change of C/I within 200ms. The core specifications place no bounds on magnitude or rate of change of C/I. For this test the magnitude of change is bounded by THRESH and HYST selection, and the rate of change is bounded by the 500ms wait periods. These bounds are selected to ensure an MS implementation is not adversely biased by this test. Maximum/Minimum Duration of Test Maximum/minimum: 54 minutes (GSM850, GSM900, DCS1800, PCS1900).
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.3.5 Test requirements	The requirement and minimum set of samples shall not exceed the values given in the following table for each set of thresholds. Event Maximum allowed error rate Minimum No. of samples C/I increases over Thresholds 11% 2000 C/I decreases below Thresholds 11% 2000 NOTE: The maximum allowed error rates for the C/I thresholds are derived from the average of the C/I event counters in Step 1 to Step 4 of the method of test.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.4 Performance of the Codec Mode Request Generation – TCH/AHS – improved RX
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.4.1 Definition	When a traffic channel supporting an Adaptive Multi-Rate speech codec is activated, the Codec Mode Request is sent by MS in band every other speech frame to indicate to the Network the recommended codec mode of the ACS to use on the downlink.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.4.2 Conformance Requirement	For TULow channel conditions with ideal frequency hopping without DTX activated, the MS shall produce Codec Mode Requests with the following accuracy: Requirement 1: When a carrier to interferer ratio 4 dB higher than a defined upper threshold is applied to the antenna connector, the MS shall request a higher mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. Requirement 2: When a carrier to interferer ratio 4 dB lower than a defined lower threshold is applied to the antenna connector, the MS shall request a lower mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. The above test levels shall be reduced by the normalization factor defined in sub-clause 3.3.1 of TS 45.009 to account for improved receiver performances, specified in 14.10.3.4.1 below. NOTE: Ideal frequency hopping assumes perfect decorrelation between bursts. For the propagation profile TU3, this is not easily achievable due to the high number of hopping frequencies required. Therefore, performance tests should be performed under ideal frequency hopping conditions for the following propagation profiles: TU50 for GSM900 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700. 3GPP TS 45.05 subclause 2: For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.4.3 Test Purpose	1. To verify that the MS does not exceed conformance requirement 1 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 2. To verify that the MS does not exceed conformance requirement 2 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 3. To implicitly verify the correct implementation of the AMR Thresholds and Hysteresis parameters received in ether an ASSIGNMENT COMMAND or MODE MODIFY procedure, or through an AMR_CONFIG_REQ or and in a AMR_CONFIG_REQ message carried in a RATSCCH. NOTE: This would normally be performed as a signalling test, however due to the complex layer 1 requirements it is verified here. Any future modification or Change Request on this section should take into account this additional test objective. NOTE: The C/I values used throughout this test have been carefully selected to ensure no values above 16dB are signalled, low C/I values will not conflict with the synchronisation requirements in TS 45.010, and also to ensure the C/I values are shared between upward and downward applications. Any future modification or Change Request on this section should take into account these aspects.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.4.4 Method of Test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.4.4.1 Initial conditions	A call is set up according to the generic call set up procedure on a TCH/AHS with a hopping pattern in the Mid ARFCN range and covering at least 10 frequencies not exceeding 5 MHz. DTX shall not be activated. Power control level shall be set to maximum power. The initial configuration indicates the use of the 7.95 mode of AMR only. The SS transmits Standard Test Signal C1 on the traffic channel. In addition to the wanted signal, the SS produces an independent, uncorrelated interfering signal, Standard Test Signal I1 (unwanted signal). - The unwanted signal is continuous and has no fixed relationship with the bit transitions of the wanted signal. Initially, the unwanted signal is switched off. - The fading characteristic of the wanted and the interfering signal is TUHigh. NOTE 1: The fading characteristics shall be TU50 for GSM900, T-GSM 810 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700. Specific PICS Statements: - PIXIT Statements: - AMR C/I normalization factors (AHS DARP) as follows: Required additional information PIXIT CI_NORM_AHS_DARP_4dB CI_NORM_AHS_DARP_6dB CI_NORM_AHS_DARP_7dB CI_NORM_AHS_DARP_10dB CI_NORM_AHS_DARP_12dB CI_NORM_AHS_DARP_13dB CI_NORM_AHS_DARP_16dB CI_NORM_AHS_DARP_17dB CI_NORM_AHS_DARP_20dB CI_NORM_AHS_DARP_21dB
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.4.4.2 Procedure	INITIAL CONFIG: 1a) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AHS in kbit/s CODEC_MODE_4 7.4 CODEC_MODE_3 6.7 CODEC_MODE_2 5.15 CODEC_MODE_1 4.75 With Initial Codec Mode unspecified, thus the default ICM rule being used and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_4 Thr1d = 17.5 dB +  CODEC_MODE_3 Thr2d = 14.5 dB Thr1u = 19.5 dB CODEC_MODE_2 Thr3d = 12.5 dB Thr2u = 16.5 dB CODEC_MODE_1   Thr3u = 14.5 dB The SS uses the expected Initial Codec Mode (default rule) after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode (default rule). 1b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AHS in kbit/s CODEC_MODE_3 7.95 CODEC_MODE_2 6.7 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 7.95 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 14.0 dB +  CODEC_MODE_2 Thr2d = 8.0 dB Thr1u = 16.0 dB CODEC_MODE_1   Thr2u = 9.0 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 7.95 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to Thr1u + 4dB - CI_NORM_AHS_DARP_20dB. The SS waits 1 second. 1c) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr1d – 4dB - CI_NORM_AHS_DARP_10dB. The SS increments the counter for ‘C/I decreases below thresholds’. 1d) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.7 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1e) The SS switches the downlink codec mode to 6.7 kbit/s and waits for 0.5s. 1f) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr2d - 4dB - CI_NORM_AHS_DARP_4dB. The SS increments the counter for ‘C/I decreases below thresholds’. 1g) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 4.75 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1h) The SS switches the downlink codec mode to 4.75 kbit/s and waits for 0.5s. 1i) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr2u + 4dB - CI_NORM_AHS_DARP_13dB. The SS increments the counter for ‘C/I increases above thresholds’. 1j) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.7 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1k) The SS switches the downlink codec mode to 6.7 kbit/s and waits for 0.5s. 1l) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr1u + 4dB - CI_NORM_AHS_DARP_20dB. The SS increments the counter for ‘C/I increases above thresholds’. 1m) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 7.95 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1n) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 1o) The SS repeat steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases samples have been recorded. STEP 2: 2a) The unwanted signal is removed. The SS then send an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AHS in kbit/s CODEC_MODE_4 7.4 CODEC_MODE_3 6.7 CODEC_MODE_2 5.15 CODEC_MODE_1 4.75 With the Initial Codec Mode set to any mode. and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_4 Thr1d = 17.5 dB +  CODEC_MODE_3 Thr2d = 14.5 dB Thr1u = 19.5 dB CODEC_MODE_2 Thr3d = 12.5 dB Thr2u = 16.5 dB CODEC_MODE_1   Thr3u = 14.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. 2b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AHS in kbit/s CODEC_MODE_3 7.95 CODEC_MODE_2 6.7 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 7.95 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 14.0 dB +  CODEC_MODE_2 Thr2d = 8 dB Thr1u = 16.0 dB CODEC_MODE_1   Thr2u = 8.0 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode. The SS waits until the MS indicates in the CMR that the 7.95 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to Thr1u + 4dB - CI_NORM_AHS_DARP_20dB. The SS waits 500ms 2c) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr1d – 4dB - CI_NORM_AHS_DARP_10dB. The SS increments the counter for ‘C/I decreases below thresholds’. 2d) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.7 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 2e) The SS switches the downlink codec mode to 6.7 kbit/s and waits for 0.5s. 2f) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr2d - 4dB - CI_NORM_AHS_DARP_4dB. The SS increments the counter for ‘C/I decreases below thresholds’. 2g) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 4.75 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 2h) The SS switches the downlink codec mode to 4.75 kbit/s and waits for 0.5s. 2i) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr2u + 4dB - CI_NORM_AHS_DARP_12dB. The SS increments the counter for ‘C/I increases above thresholds’. 2j) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.7 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 2k) The SS switches the downlink codec mode to 6.7 kbit/s and waits for 0.5s. 2l) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr1u + 4dB - CI_NORM_AHS_DARP_20dB. The SS increments the counter for ‘C/I increases above thresholds’. 2m) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 7.95 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 2n) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 2o) The SS repeats steps 2c) to 2n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 3: 3a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the AMR 6.7 kbit/s mode only: The SS switches the downlink codec to the 6.7 mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested codec. The SS waits for the MS to change the uplink codec to the expected codec, 12 frames after receiving the ACK_OK message. 3b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode TCH/AHS in kbit/s CODEC_MODE_3 7.95 CODEC_MODE_2 6.7 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 7.95 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 18.5 dB +  CODEC_MODE_2 Thr2d = 10.5 dB Thr1u = 20.5 dB CODEC_MODE_1   Thr2u = 12.5 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode The SS waits until the MS indicates in the CMR that the 7.95 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. 3c) The SS then sends a THRESH_REQ through a RATSCCH message commanding the MS to modify the Thresholds and Hysteresis to the following values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 16.0 dB +  CODEC_MODE_2 Thr2d = 11.0 dB Thr1u = 17.0 dB CODEC_MODE_1   Thr2u = 13.0 dB The SS waits 12 frames after receiving the ACK_OK message. 3d) The SS waits until the MS indicates in the CMR that the 7.95 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to Thr1u + 4dB - CI_NORM_AHS_DARP_21dB. The SS waits 500ms 3e) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr1d – 4dB - CI_NORM_AHS_DARP_12dB. The SS increments the counter for ‘C/I decreases below thresholds’. 3f) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.7 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 3g) The SS switches the downlink codec mode to 6.7 kbit/s and waits for 0.5s. 3h) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr2d - 4dB - CI_NORM_AHS_DARP_7dB. The SS increments the counter for ‘C/I decreases below thresholds’. 3i) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 4.75 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 3j) The SS switches the downlink codec mode to 4.75 kbit/s and waits for 0.5s. 3k) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr2u + 4dB - CI_NORM_AHS_DARP_17dB. The SS increments the counter for ‘C/I increases above thresholds’. 3l) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.7 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 3m) The SS switches the downlink codec mode to 6.7 kbit/s and waits for 0.5s. 3n) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr1u + 4dB - CI_NORM_AHS_DARP_21dB. The SS increments the counter for ‘C/I increases above thresholds’. 3o) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 7.95 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 3p) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 3q) The SS repeats steps 3e) to 3p) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 4: 4a) The unwanted signal is removed. The SS uses a Channel Mode Modify procedure commanding the MS to use the AMR 5.15 kbit/s mode only: The SS waits for the MS to change the uplink codec to the 5.15 kbit/s mode. 4b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode TCH/AHS in kbit/s CODEC_MODE_3 7.95 CODEC_MODE_2 6.7 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 7.95 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 17.0 dB +  CODEC_MODE_2 Thr2d = 10.0 dB Thr1u = 17.0 dB CODEC_MODE_1   Thr2u = 12.0 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 7.95 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to Thr1u + 4dB - CI_NORM_AHS_DARP_21dB. The SS waits 500ms 4c) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr1d – 4dB - CI_NORM_AHS_DARP_13dB. The SS increments the counter for ‘C/I decreases below thresholds’. 4d) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.7 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 4e) The SS switches the downlink codec mode to 6.7 kbit/s and waits for 0.5s. 4f) The downlink radio environment is altered so that the carrier to interference ratio is reduced to Thr2d - 4dB - CI_NORM_AHS_DARP_6dB. The SS increments the counter for ‘C/I decreases below thresholds’. 4g) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 4.75 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 4h) The SS switches the downlink codec mode to 4.75 kbit/s and waits for 0.5s. 4i) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr2u + 4dB - CI_NORM_AHS_DARP_16dB. The SS increments the counter for ‘C/I increases above thresholds’. 4j) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.7 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 4k) The SS switches the downlink codec mode to 6.7 kbit/s and waits for 0.5s. 4l) The downlink radio environment is altered so that the carrier to interference ratio is increased to Thr1u + 4dB - CI_NORM_AHS_DARP_21dB. The SS increments the counter for ‘C/I increases above thresholds’. 4m) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 7.95 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 4n) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 4o) The SS repeats steps 4c) to 4n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. NOTE: The core specifications state that an MS shall respond to a change of C/I within 200ms. The core specifications place no bounds on magnitude or rate of change of C/I. For this test the magnitude of change is bounded by THRESH and HYST selection, and the rate of change is bounded by the 500ms wait periods. These bounds are selected to ensure an MS implementation is not adversely biased by this test. Maximum/Minimum Duration of Test Maximum/minimum: 54 minutes (GSM850, GSM900, DCS1800, PCS1900).
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.4.5 Test requirements	The requirement and minimum set of samples shall not exceed the values given in the following table for each set of thresholds. Event Maximum allowed error rate Minimum No. of samples C/I increases over Thresholds 11% 2000 C/I decreases below Thresholds 11% 2000 NOTE: The maximum allowed error rates for the C/I thresholds are derived from the average of the C/I event counters in Step 1 to Step 4 of the method of test.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.5 Performance of the Codec Mode Request Generation – O-TCH/AHS
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.5.1 Definition	When a traffic channel supporting an Adaptive Multi-Rate speech codec is activated, the Codec Mode Request is sent by MS in band every other speech frame to indicate to the Network the recommended codec mode of the ACS to use on the downlink.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.5.2 Conformance Requirement	For TULow channel conditions with ideal frequency hopping without DTX activated, the MS shall produce Codec Mode Requests with the following accuracy: Requirement 1: When a carrier to interferer ratio 4 dB higher than a defined upper threshold is applied to the antenna connector, the MS shall request a higher mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. Requirement 2: When a carrier to interferer ratio 4 dB lower than a defined lower threshold is applied to the antenna connector, the MS shall request a lower mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. If required, the above test levels shall be reduced by the fixed normalization factor defined in sub-clause 3.3.1 of TS 45.009 to account for potential improved receiver performances. NOTE: Ideal frequency hopping assumes perfect decorrelation between bursts. For the propagation profile TU3, this is not easily achievable due to the high number of hopping frequencies required. Therefore, performance tests should be performed under ideal frequency hopping conditions for the following propagation profiles: TU50 for GSM900 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700. 3GPP TS 45.05 subclause 2: For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.5.3 Test Purpose	1. To verify that the MS does not exceed conformance requirement 1 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 2. To verify that the MS does not exceed conformance requirement 2 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 3. To implicitly verify the correct implementation of the AMR Thresholds and Hysteresis parameters received in either an ASSIGNMENT COMMAND or MODE MODIFY procedure, or through an AMR_CONFIG_REQ or THRESH_REQ message carried in a RATSCCH. NOTE: This would normally be performed as a signalling test, however due to the complex layer 1 requirements it is verified here. Any future modification or Change Request on this section should take into account this additional test objective.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.5.4 Method of Test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.5.4.1 Initial conditions	A call is set up according to the generic call set up procedure on a O-TCH/AHS with a hopping pattern in the Mid ARFCN range and covering at least 10 frequencies not exceeding 5 MHz. DTX shall not be activated. Power control level shall be set to maximum power. The initial configuration indicates the use of the 12.2 mode of AMR only. The SS transmits Standard Test Signal C1 on the traffic channel. In addition to the wanted signal, the SS produces an independent, uncorrelated interfering signal, Standard Test Signal I1 (unwanted signal). - The unwanted signal is continuous and has no fixed relationship with the bit transitions of the wanted signal. Initially, the unwanted signal is switched off. - The fading characteristic of the wanted and the interfering signal is TUHigh. NOTE 1: The fading characteristics shall be TU50 for GSM900, T-GSM 810 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700. Specific PICS Statements: - PIXIT Statements: - AMR C/I normalization factor.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.5.4.2 Procedure	INITIAL CONFIG: 1a) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode O-TCH/AHS in kbit/s CODEC_MODE_4 10,2 CODEC_MODE_3 7.4 CODEC_MODE_2 6,7 CODEC_MODE_1 5,15 With Initial Codec Mode unspecified, thus the default ICM rule being used and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_4 Thr1d = 17.5 dB +  CODEC_MODE_3 Thr2d = 14.5 dB Thr1u = 19.5 dB CODEC_MODE_2 Thr3d = 12.5 dB Thr2u = 16.5 dB CODEC_MODE_1   Thr3u = 14.5 dB The SS uses the expected Initial Codec Mode (default rule) after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode (default rule). 1b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode O-TCH/AHS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 12.5 dB +  CODEC_MODE_2 Thr2d = 6.5 dB Thr1u = 14.5 dB CODEC_MODE_1   Thr2u = 8.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms. 1c) The downlink radio environment is altered so that the carrier to interference ratio is reduced to 4 dB below the highest of the downwards thresholds Thr1d. The SS increments the counter for ‘C/I decreases below thresholds’. 1d) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1e) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 1f) The downlink radio environment is altered so that the carrier to interference ratio is reduced to 4 dB below the lowest of the downwards thresholds Thr2d. The SS increments the counter for ‘C/I decreases below thresholds’. 1g) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 4.75 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1h) The SS switches the downlink codec mode to 4.75 kbit/s and waits for 0.5s. 1i) The downlink radio environment is altered so that the carrier to interference ratio is increased to 4 dB above the lowest of the upwards thresholds Thr2u. The SS increments the counter for ‘C/I increases above thresholds’. 1j) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 7.95 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1k) The SS switches the downlink codec mode to 7.95 kbit/s and waits for 0.5s. 1l) The downlink radio environment is altered so that the carrier to interference ratio is increased to 4 dB above the highest of the upwards thresholds Thr1u. The SS increments the counter for ‘C/I increases above thresholds’. 1m) The SS checks the CMR received by the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 12.2 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1n) The SS switches the downlink codec mode to 12.2 kbit/s and waits for 0.5s. 1o) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 2: 2a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode O-TCH/AHS in kbit/s CODEC_MODE_4 10,2 CODEC_MODE_3 7.4 CODEC_MODE_2 6,7 CODEC_MODE_1 5,15 With the Initial Codec Mode set to any mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_4 Thr1d = 17.5 dB +  CODEC_MODE_3 Thr2d = 14.5 dB Thr1u = 19.5 dB CODEC_MODE_2 Thr3d = 12.5 dB Thr2u = 16.5 dB CODEC_MODE_1   Thr3u = 14.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. 2b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode O-TCH/AHS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 11.5 dB +  CODEC_MODE_2 Thr2d = 5.5 dB Thr1u = 13.5 dB CODEC_MODE_1   Thr2u = 7.5 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode. The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 2c) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 3: 3a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the AMR 7.95 kbit/s mode only: The SS switches the downlink codec to the 7.95 mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested codec. The SS waits for the MS to change the uplink codec to the expected codec, 12 frames after receiving the ACK_OK message. 3b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode O-TCH/AHS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 18.5 dB +  CODEC_MODE_2 Thr2d = 10.5 dB Thr1u = 20.5 dB CODEC_MODE_1   Thr2u = 12.5 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. 3c) The SS then sends a THRESH_REQ through a RATSCCH message commanding the MS to modify the Thresholds and Hysteresis to the following values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 13.5 dB +  CODEC_MODE_2 Thr2d = 7.5 dB Thr1u = 15.5 dB CODEC_MODE_1   Thr2u = 9.5 dB The SS waits 12 frames after receiving the ACK_OK message. 3d) The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 3e) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 4: 4a) The unwanted signal is removed. The SS uses a Channel Mode Modify procedure commanding the MS to use the AMR 10.2 kbit/s mode only: The SS waits for the MS to change the uplink codec to the 10.2 kbit/s mode. 4b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode O-TCH/AHS in kbit/s CODEC_MODE_3 12,2 CODEC_MODE_2 7.95 CODEC_MODE_1 4,75 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 12.5 dB +  CODEC_MODE_2 Thr2d = 6.5 dB Thr1u = 14.5 dB CODEC_MODE_1   Thr2u = 8.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 12.2 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 4c) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. NOTE: The core specifications state that an MS shall respond to a change of C/I within 200ms. The core specifications place no bounds on magnitude or rate of change of C/I. For this test the magnitude of change is bounded by THRESH and HYST selection, and the rate of change is bounded by the 500ms wait periods. These bounds are selected to ensure an MS implementation is not adversely biased by this test. Maximum/Minimum Duration of Test Maximum/minimum: 54 minutes (GSM850, GSM900, DCS1800, PCS1900).
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.5.5 Test requirements	The requirement and minimum set of samples shall not exceed the values given in the following table for each set of thresholds. Event Maximum allowed error rate Minimum No. of samples C/I increases over Thresholds 11% 2000 C/I decreases below Thresholds 11% 2000 NOTE: The maximum allowed error rates for the C/I thresholds are derived from the average of the C/I event counters in Step 1 to Step 4 of the method of test.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.6 Performance of the Codec Mode Request Generation – O-TCH/WFS
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.6.1 Definition	When a traffic channel supporting an Adaptive Multi-Rate speech codec is activated, the Codec Mode Request is sent by MS in band every other speech frame to indicate to the Network the recommended codec mode of the ACS to use on the downlink.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.6.2 Conformance Requirement	For TU3 channel conditions with ideal frequency hopping without DTX activated in GSM900 and GSM850, the MS shall produce Codec Mode Requests with the following accuracy: - When a carrier to interferer ratio 4 dB higher than a defined upper threshold is applied to the antenna connector, the MS shall request a higher mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. - When a carrier to interferer ratio 4 dB lower than a defined lower threshold is applied to the antenna connector, the MS shall request a lower mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. If required, the above test levels shall be reduced by the normalization factor defined in sub-clause 3.3.1 to account for potential improved receiver performances. For other frequency bands, the propagation profile should be adjusted to: TU1.5 for DCS1800 and PCS1900, TU6 for GSM400 and TU3.6 for GSM700. NOTE 1: Ideal frequency hopping assumes perfect decorrelation between bursts. For the propagation profile TU3, this is not easily achievable due to the high number of hopping frequencies required. Therefore, performance tests should be performed under ideal frequency hopping conditions for the following propagation profiles: TU50 for GSM900 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700. 3GPP TS 45.009, subclause 3.3.3.3
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.6.3 Test Purpose	1. To verify that the MS does not exceed the conformance requirements (for producing codec request) under TU High and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 2. To implicitly verify the correct implementation of the AMR Thresholds and Hysteresis parameters received in either an ASSIGNMENT COMMAND or MODE MODIFY procedure, or through an AMR_CONFIG_REQ or THRESH_REQ message carried in a RATSCCH. NOTE: This would normally be performed as a signalling test, however due to the complex layer 1 requirements it is verified here. Any future modification or Change Request on this section should take into account this additional test objective.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.6.4 Method of Test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.6.4.1 Initial conditions	A call is set up according to the generic call set up procedure on a O-TCH/WFS with a hopping pattern in the Mid ARFCN range and covering at least 10 frequencies not exceeding 5 MHz. DTX shall not be activated. Power control level shall be set to maximum power. The initial configuration indicates the use of the 12.65 mode of AMR only. The SS transmits Standard Test Signal C1 on the traffic channel. In addition to the wanted signal, the SS produces an independent, uncorrelated interfering signal, Standard Test Signal I1 (unwanted signal). - The unwanted signal is continuous and has no fixed relationship with the bit transitions of the wanted signal. Initially, the unwanted signal is switched off. - The fading characteristic of the wanted and the interfering signal is TU High. NOTE 1: The fading characteristics shall be TU50 for GSM900 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700.. Specific PICS Statements: - PIXIT Statements: - O-TCH/F C/I normalisation factor
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.6.4.2 Procedure	INITIAL CONFIG: 1a) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode O-TCH/WFS in kbit/s CODEC_MODE_4 23,85 CODEC_MODE_3 12,65 CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With Initial Codec Mode unspecified, thus the default ICM rule being used and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_4 Thr1d = 17.5 dB  CODEC_MODE_3 Thr2d = 14.5 dB Thr1u = 19.5 dB CODEC_MODE_2 Thr3d = 12.5 dB Thr2u = 16.5 dB CODEC_MODE_1  Thr3u = 14.5 dB The SS uses the expected Initial Codec Mode (default rule) after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode (default rule). 1b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode O-TCH/WFS in kbit/s CODEC_MODE_3 12,65 CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With the Initial Codec Mode set to the 12.65 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 12.5 dB  CODEC_MODE_2 Thr2d = 6.5 dB Thr1u = 14.5 dB CODEC_MODE_1  Thr2u = 8.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 12.65 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms. 1c) The downlink radio environment is altered so that the carrier to interference ratio is reduced to 4 dB below the highest of the downwards thresholds Thr1d. The SS increments the counter for ‘C/I decreases below thresholds’. 1d) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 8.85 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1e) The SS switches the downlink codec mode to 8.85 kbit/s and waits for 0.5s. 1f) The downlink radio environment is altered so that the carrier to interference ratio is reduced to 4 dB below the lowest of the downwards thresholds Thr2d. The SS increments the counter for ‘C/I decreases below thresholds’. 1g) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.6 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1h) The SS switches the downlink codec mode to 6.6 kbit/s and waits for 0.5s. 1i) The downlink radio environment is altered so that the carrier to interference ratio is increased to 4 dB above the lowest of the upwards thresholds Thr2u. The SS increments the counter for ‘C/I increases above thresholds’. 1j) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 8.85 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1k) The SS switches the downlink codec mode to 8.85 kbit/s and waits for 0.5s. 1l) The downlink radio environment is altered so that the carrier to interference ratio is increased to 4 dB above the highest of the upwards thresholds Thr1u. The SS increments the counter for ‘C/I increases above thresholds’. 1m) The SS checks the CMR received by the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 12.65 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1n) The SS switches the downlink codec mode to 12.65 kbit/s and waits for 0.5s. 1o) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 2: 2a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode O-TCH/WFS in kbit/s CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With the Initial Codec Mode set to any mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_2 Thr3d = 12.5 dB  CODEC_MODE_1  Thr3u = 14.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. 2b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode O-TCH/WFS in kbit/s CODEC_MODE_3 12,65 CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With the Initial Codec Mode set to the 12.65 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 11.5 dB  CODEC_MODE_2 Thr2d = 5.5 dB Thr1u = 13.5 dB CODEC_MODE_1  Thr2u = 7.5 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode. The SS waits until the MS indicates in the CMR that the 12.65 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 2c) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 3: 3a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the AMR 8.85 kbit/s mode only: The SS switches the downlink codec to the 8.85 mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested codec. The SS waits for the MS to change the uplink codec to the expected codec, 12 frames after receiving the ACK_OK message. 3b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode O-TCH/WFS in kbit/s CODEC_MODE_3 12,65 CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With the Initial Codec Mode set to the 12.65 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 18.5 dB  CODEC_MODE_2 Thr2d = 10.5 dB Thr1u = 20.5 dB CODEC_MODE_1  Thr2u = 12.5 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode The SS waits until the MS indicates in the CMR that the 12.65 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. 3c) The SS then sends a THRESH_REQ through a RATSCCH message commanding the MS to modify the Thresholds and Hysteresis to the following values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 13.5 dB  CODEC_MODE_2 Thr2d = 7.5 dB Thr1u = 15.5 dB CODEC_MODE_1  Thr2u = 9.5 dB The SS waits 12 frames after receiving the ACK_OK message. 3d) The SS waits until the MS indicates in the CMR that the 12.65 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 3e) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 4: 4a) The unwanted signal is removed. - The SS uses a Channel Mode Modify procedure commanding the MS to use the AMR 8.85 kbit/s mode only: - The SS waits for the MS to change the uplink codec to the 8.85 kbit/s mode. 4b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode O-TCH/WFS in kbit/s CODEC_MODE_3 12,65 CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With the Initial Codec Mode set to the 12.65 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 12.5 dB  CODEC_MODE_2 Thr2d = 6.5 dB Thr1u = 14.5 dB CODEC_MODE_1  Thr2u = 8.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 12.65 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 4c) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. NOTE: The core specifications state that an MS shall respond to a change of C/I within 200ms. The core specifications place no bounds on magnitude or rate of change of C/I. For this test the magnitude of change is bounded by THRESH and HYST selection, and the rate of change is bounded by the 500ms wait periods. These bounds are selected to ensure an MS implementation is not adversely biased by this test. Maximum/Minimum Duration of Test Maximum/minimum: 54 minutes.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.6.5 Test requirements	The requirement and minimum set of samples shall not exceed the values given in the following table for each set of thresholds. Event Maximum allowed error rate Minimum No. of samples C/I increases over Thresholds 11% 2000 C/I decreases below Thresholds 11% 2000 NOTE: The maximum allowed error rates for the C/I thresholds are derived from the average of the C/I event counters in Step 1 to Step 4 of the method of test.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.7 Performance of the Codec Mode Request Generation – O-TCH/WHS
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.7.1 Definition	When a traffic channel supporting an Adaptive Multi-Rate speech codec is activated, the Codec Mode Request is sent by MS in band every other speech frame to indicate to the Network the recommended codec mode of the ACS to use on the downlink.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.7.2 Conformance Requirement	For TULow channel conditions with ideal frequency hopping without DTX activated, the MS shall produce Codec Mode Requests with the following accuracy: Requirement 1: When a carrier to interferer ratio 4 dB higher than a defined upper threshold is applied to the antenna connector, the MS shall request a higher mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. Requirement 2: When a carrier to interferer ratio 4 dB lower than a defined lower threshold is applied to the antenna connector, the MS shall request a lower mode with a probability exceeding 90%. This shall be measured immediately after a settling-time of 200 ms. If required, the above test levels shall be reduced by the fixed normalization factor defined in sub-clause 3.3.1 of TS 45.009 to account for potential improved receiver performances. NOTE: Ideal frequency hopping assumes perfect decorrelation between bursts. For the propagation profile TU3, this is not easily achievable due to the high number of hopping frequencies required. Therefore, performance tests should be performed under ideal frequency hopping conditions for the following propagation profiles: TU50 for GSM900 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.7.3 Test Purpose	1. To verify that the MS does not exceed conformance requirement 1 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 2. To verify that the MS does not exceed conformance requirement 2 under TUHigh and frequency hopping propagation conditions without DTX with an allowance for the statistical significance of the test. 3. To implicitly verify the correct implementation of the AMR Thresholds and Hysteresis parameters received in either an ASSIGNMENT COMMAND or MODE MODIFY procedure, or through an AMR_CONFIG_REQ or THRESH_REQ message carried in a RATSCCH. NOTE: This would normally be performed as a signalling test, however due to the complex layer 1 requirements it is verified here. Any future modification or Change Request on this section should take into account this additional test objective.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.7.4 Method of Test
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.7.4.1 Initial conditions	A call is set up according to the generic call set up procedure on a O-TCH/WHS with a hopping pattern in the Mid ARFCN range and covering at least 10 frequencies not exceeding 5 MHz. DTX shall not be activated. Power control level shall be set to maximum power. The initial configuration indicates the use of the 12.65 mode of AMR only. The SS transmits Standard Test Signal C1 on the traffic channel. In addition to the wanted signal, the SS produces an independent, uncorrelated interfering signal, Standard Test Signal I1 (unwanted signal). - The unwanted signal is continuous and has no fixed relationship with the bit transitions of the wanted signal. Initially, the unwanted signal is switched off. - The fading characteristic of the wanted and the interfering signal is TUHigh. NOTE 1: The fading characteristics shall be TU50 for GSM900 and GSM850, TU25 for DCS1800 and PCS1900, TU100 for GSM400, and TU60 for GSM700.. Specific PICS Statements: - PIXIT Statements: - AMR C/I normalization factor.
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.7.4.2 Procedure	INITIAL CONFIG: 1a) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode O-TCH/WHS in kbit/s CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With Initial Codec Mode unspecified, thus the default ICM rule being used and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_2 Thr3d = 12.5 dB +  CODEC_MODE_1   Thr3u = 14.5 dB The SS uses the expected Initial Codec Mode (default rule) after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode (default rule). 1b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode O-TCH/WHS in kbit/s CODEC_MODE_3 12,65 CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With the Initial Codec Mode set to the 12.65 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 12.5 dB +  CODEC_MODE_2 Thr2d = 6.5 dB Thr1u = 14.5 dB CODEC_MODE_1   Thr2u = 8.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 12.65 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms. 1c) The downlink radio environment is altered so that the carrier to interference ratio is reduced to 4 dB below the highest of the downwards thresholds Thr1d. The SS increments the counter for ‘C/I decreases below thresholds’. 1d) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 8.85 kbit/s or a lower codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1e) The SS switches the downlink codec mode to 8.85 kbit/s and waits for 0.5s. 1f) The downlink radio environment is altered so that the carrier to interference ratio is reduced to 4 dB below the lowest of the downwards thresholds Thr2d. The SS increments the counter for ‘C/I decreases below thresholds’. 1g) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 6.6 kbits/s codec mode in the downlink, then the SS should increment the successful C/I decrease event counter. Otherwise, the SS should increment the unsuccessful C/I decrease event counter. 1h) The SS switches the downlink codec mode to 6.6 kbit/s and waits for 0.5s. 1i) The downlink radio environment is altered so that the carrier to interference ratio is increased to 4 dB above the lowest of the upwards thresholds Thr2u. The SS increments the counter for ‘C/I increases above thresholds’. 1j) The SS checks the CMR received from the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use the 8.85 kbit/s or a higher codec mode in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1k) The SS switches the downlink codec mode to 8.85 kbit/s and waits for 0.5s. 1l) The downlink radio environment is altered so that the carrier to interference ratio is increased to 4 dB above the highest of the upwards thresholds Thr1u. The SS increments the counter for ‘C/I increases above thresholds’. 1m) The SS checks the CMR received by the MS 200ms after the carrier to interference has been altered. If the CMR indicates that the MS recommends to use 12.65 kbit/s in the downlink, then the SS should increment the successful C/I increase event counter. Otherwise, the SS should increment the unsuccessful C/I increase event counter. 1n) The SS switches the downlink codec mode to 12.65 kbit/s and waits for 0.5s. 1o) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 2: 2a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode O-TCH/WHS in kbit/s CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With the Initial Codec Mode set to any mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_2 Thr3d = 12.5 dB +  CODEC_MODE_1   Thr3u = 14.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. 2b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode O-TCH/WHS in kbit/s CODEC_MODE_3 12,65 CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With the Initial Codec Mode set to the 12.2 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 11.5 dB +  CODEC_MODE_2 Thr2d = 5.5 dB Thr1u = 13.5 dB CODEC_MODE_1   Thr2u = 7.5 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode. The SS waits until the MS indicates in the CMR that the 12.65 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 2c) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 3: 3a) The unwanted signal is removed. The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the AMR 8.85 kbit/s mode only: The SS switches the downlink codec to the 8.85 mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested codec. The SS waits for the MS to change the uplink codec to the expected codec, 12 frames after receiving the ACK_OK message. 3b) The SS uses a Channel Mode Modify procedure to change the active codec set to the following set: Codec Mode O-TCH/WHS in kbit/s CODEC_MODE_3 12,65 CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With the Initial Codec Mode set to the 12.65 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 18.5 dB +  CODEC_MODE_2 Thr2d = 10.5 dB Thr1u = 20.5 dB CODEC_MODE_1   Thr2u = 12.5 dB The SS switches the downlink codec to the Initial Codec Mode after sending the mode modify message and commands the MS through the CMC field to use the Initial Codec Mode as well. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode The SS waits until the MS indicates in the CMR that the 12.65 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. 3c) The SS then sends a THRESH_REQ through a RATSCCH message commanding the MS to modify the Thresholds and Hysteresis to the following values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 13.5 dB +  CODEC_MODE_2 Thr2d = 7.5 dB Thr1u = 15.5 dB CODEC_MODE_1   Thr2u = 9.5 dB The SS waits 12 frames after receiving the ACK_OK message. 3d) The SS waits until the MS indicates in the CMR that the 12.65 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 3e) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. STEP 4: 4a) The unwanted signal is removed. - The SS uses a Channel Mode Modify procedure commanding the MS to use the AMR 8.85 kbit/s mode only: - The SS waits for the MS to change the uplink codec to the 8.85 kbit/s mode. 4b) The SS then sends an AMR_CONF_REQ through a RATSCCH message commanding the MS to use the following ACS: Codec Mode O-TCH/WHS in kbit/s CODEC_MODE_3 12,65 CODEC_MODE_2 8,85 CODEC_MODE_1 6,6 With the Initial Codec Mode set to the 12.65 kbit/s mode and the following decision thresholds and hysteresis values: MC'/MR' THR_MC_Dn(MC)/ THR_MR_Dn(MR) THR_MC_Up(MC)/ THR_MR_Up(MR) CODEC_MODE_3 Thr1d = 12.5 dB +  CODEC_MODE_2 Thr2d = 6.5 dB Thr1u = 14.5 dB CODEC_MODE_1   Thr2u = 8.5 dB The SS switches the downlink codec to the Initial Codec Mode 12 frames after sending the AMR_CONF_REQ message and commands the MS through the CMC field to use the requested Initial Codec Mode. The SS waits for the MS to change the uplink codec to the expected Initial Codec Mode, 12 frames after receiving the ACK_OK message. The SS waits until the MS indicates in the CMR that the 12.65 kbit/s is the recommended downlink codec mode. If the MS never reaches that point then the test is failed. The downlink radio environment is altered so that the carrier to interference ratio is set to 4 dB above the highest of the upwards thresholds Thr1u. The SS waits 500ms 4c) The SS repeats steps 1c) to 1n) until 500 samples of C/I increases and 500 samples of C/I decreases have been recorded. NOTE: The core specifications state that an MS shall respond to a change of C/I within 200ms. The core specifications place no bounds on magnitude or rate of change of C/I. For this test the magnitude of change is bounded by THRESH and HYST selection, and the rate of change is bounded by the 500ms wait periods. These bounds are selected to ensure an MS implementation is not adversely biased by this test. Maximum/Minimum Duration of Test Maximum/minimum: 54 minutes (GSM850, GSM900, DCS1800, PCS1900).
683b5b8a98f7b1390ddd5516ea9247a2	51.010-1	14.10.7.5 Test requirements	The requirement and minimum set of samples shall not exceed the values given in the following table for each set of thresholds. Event Maximum allowed error rate Minimum No. of samples C/I increases over Thresholds 11% 2000 C/I decreases below Thresholds 11% 2000 NOTE: The maximum allowed error rates for the C/I thresholds are derived from the average of the C/I event counters in Step 1 to Step 4 of the method of test.

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