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1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.3.4 Method of test | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.3.4.1 Initial conditions | 1) Common with the 3.84 Mcps chip rate
2) The level of the BS tester output signal measured at the BS antenna connector shall be adjusted as specified in table in subclause 8.4.3.2
3) The power spectral density of the band-limited white noise source measured at the BS antenna connector shall be adjusted as specified in table in subclause 8.4.3.2. The minimum bandwidth of the white noise source shall be 1,5 times the chip rate (1,92 MHz for a chip rate of 1.28 Mcps). |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.3.4.2 Procedure | Common with 3.84 Mcps chip rate TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.3.5 Test requirement | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.3.6 Explanation difference | Due to the smaller bandwidth in low chip rate TDD the bandwidth of the white noise source is changed. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.4 Adjacent Channel Selectivity (ACS) | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.4.1 Definition and applicability | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.4.2 Conformance requirements | The BER, measured on the wanted signal in the presence of an interfering signal, shall not exceed 0,001 for the parameters specified in table in section 6.3.4 of TR 25.945. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.4.3 Test purpose | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.4.4 Method of test | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.4.4.1 Initial conditions | Common with the 3.84 Mcps chip rate
Common with the 3.84 Mcps chip rate
Start transmission from the BS tester to the BS using the UL reference measurement channel (12.2 kbps) defined in Annex C.3.The level of the UE simulator signal measured at the BS antenna connector shall be adjusted to the value specified in table in subclause 8.4.4.2
Set the signal generator to produce an interfering signal that is equivalent to a continuous narrow band CDMA signal with one code of chip frequency 1.28 Mchip/s, filtered by an RRC transmit pulse-shaping filter with roll-off = 0,22 and 1.6MHz bandwidth. The level of the interfering signal measured at the BS antenna connector shall be adjusted to the value specified in table in subclause 8.4.4.2 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.4.4.2 Procedure | 1) Set the center frequency of the interfering signal to 1,6 MHz above the assigned channel frequency of the wanted signal.
2) Measure the BER of the wanted signal at the BS receiver.
3) Set the center frequency of the interfering signal to 1,6 MHz below the assigned channel frequency of the wanted signal.
4) Measure the BER of the wanted signal at the BS receiver.
5) Interchange the connections of the BS Rx ports and repeat the measurements according to steps (1) to (4). |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.4.5 Test requirements | The BER measured according subclause 8.4.4.4.2 to shall not exceed 0,001. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.4.6 Explanation difference | Because bandwidth of 1.28 Mcps TDD option is 1,6MHz, the frequency offset of the interfering singal should be 1,6MHz. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.5 Blocking characteristics | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.5.1 Definition and applicability | The blocking characteristics is a measure of the receiver ability to receive a wanted signal at its assigned channel frequency in the presence of an unwanted interferer on frequencies other than those of the adjacent channels. The blocking performance shall apply at all frequencies as specified in tables in section 6.3.2 of TR 25.945 respectively, using a 1 MHz step size.
The requirements in this subclause shall apply to base stations intended for general-purpose applications. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.5.2 Conformance requirements | The static reference performance as specified in the section 6.3.2 of TR 25.945 should be met with a wanted and an interfering signal coupled to the BS antenna input using the parameters specified in tables in section 6.3.5 of TR 25.945 respectively, using a 1 MHz step size.. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.5.3 Test purpose | The test stresses the ability of the BS receiver to withstand high-level interference from unwanted signals at frequency offsets of 3.2 MHz or more, without undue degradation of its sensitivity. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.5.4 Method of test | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.5.4.1 Initial conditions | 1) Connect an UE simulator operating at the assigned channel frequency of the wanted signal and a signal generator to the antenna connector of one Rx port.
2) Terminate or disable any other Rx port not under test.
3) Start transmission from the BS tester to the BS using the UL reference measurement channel (12.2 kbps) defined in Annex C.3.The level of the UE simulator signal measured at the BS antenna connector shall be set to 6 dB above the reference sensitivity level specified section 6.3.2. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.5.4.2 Procedure | 1) Set the signal generator to produce an interfering signal at a frequency offset Fuw from the assigned channel frequency of the wanted signal which is given by
Fuw = (n x 1 MHz),
where n shall be increased in integer steps from n = 10 up to such a value that the center frequency of the interfering signal covers the range from 1 MHz to 12,75 GHz. The interfering signal level measured at the antenna connector shall be set in dependency of its center frequency, as specified in tables in section 6.3.5 of TR 25.945. respectively. The type of the interfering signal is either equivalent to a continuous narrow band CDMA signal with one code of chip frequency 1.28 Mchip/s, filtered by an RRC transmit pulse-shaping filter with roll-off = 0,22, or a CW signal; see tables in section 6.3.5 of TR 25.945 respectively.
2) Common with 3.84 Mcps chip rate TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.5.5 Test requirements | In all measurements made according to subclause 8.4.5.4.2, the BER shall not exceed 0,001. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.5.6 Explanation difference | Because the chip rate of the wanted signal is 1.28 Mcps, the type of the interfering signal is either equivalent to a continuous narrow band CDMA signal with one code of chip frequency 1.28 Mchip/s. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.6 Intermodulation characteristics | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.6.1 Definition and applicability | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.6.2 Conformance requirements | The static reference performance as specified in clause 8.4.2 of TR 25.945 should be met when the following signals are coupled to the BS antenna input.
A wanted signal at the assigned channel frequency, 6 dB above the static reference level.
Two interfering signals with the parameters specified in following table.
Table 8.15: Parameters of the interfering signals for intermodulation characteristics testing of 1.28 Mcps TDD option
Interfering Signal Level
Offset
Type of Interfering Signal
- 48 dBm
3,2 MHz
CW signal
- 48 dBm
6,4 MHz
NCDMA signal with one code
The reference for this requirement is subclause 6.3.6. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.6.3 Test purpose | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.6.4 Method of test | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.6.4.1 Initial conditions | 1) Common with 3.84 Mcps chip rate TDD option.
2) Common with 3.84 Mcps chip rate TDD option.
3) Start transmission from the BS tester to the BS using the UL reference measurement channel (12.2 kbps) defined in Annex 8.A.2 of TR 25.945 The level of the UE simulator signal measured at the BS antenna connector shall be set to 6 dB above the reference sensitivity level specified section 6.3.2 of TR 25.945.
4) Set the first signal generator to produce a CW signal with a level measured at the BS antenna connector of - 48 dBm.
5) Set the second signal generator to produce an interfering signal equivalent to a narrow band CDMA signal with one code of chip frequency 1.28 Mchip/s, filtered by an RRC transmit pulse-shaping filter with roll-off = 0,22. The level of the signal measured at the BS antenna connector shall be set to - 48 dBm. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.6.4.2 Procedure | 1) The frequency of the first and the second signal generator shall be set to 3,2 MHz and 6,4 MHz, respectively, above the assigned channel frequency of the wanted signal.
2) Measure the BER of the wanted signal at the BS receiver.
3) The frequency of the first and the second signal generator shall be set to 3,2 MHz and 6,4 MHz, respectively, below the assigned channel frequency of the wanted signal.
4) Measure the BER of the wanted signal at the BS receiver.
5) Interchange the connections of the BS Rx ports and repeat the measurements according to steps (1) to (4). |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.6.5 Test requirements | The BER measured according subclause 8.4.6.4.2 to shall not exceed 0,001. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.6.6 Explanation difference | Because the bandwidth of 1.28 Mcps TDD is 1,6MHz, the frequency offsets of first and second interference signal should be 3,2MHz and 6,4MHz respectively. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.7 Spurious emissions | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.7.1 Definition and applicability | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.7.2 Conformance requirements | The power of any spurious emission shall not exceed the values given in table in section 6.3.7 of TR 25.945 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.7.3 Test requirements | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.7.4 Method of test | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.7.4.1 Initial conditions | 1) Common with the 3.84 Mcps chip rate
2) Common with the 3.84 Mcps chip rate
3) Common with the 3.84 Mcps chip rate
4) Set the BS to transmit a signal with parameters according to following table.
5) Common with the 3.84 Mcps chip rate
Table 8.16: Parameters of the transmitted signal for Rx spurious emissions test
Parameter
Value/description
TDD Duty Cycle
TS i; i = 0, 1, 2, ..., 6:
transmit, if i is 0,4,5,6;
receive, if i is 1,2,3.
BS output power setting
PRAT
Number of DPCH in each active TS
8
Power of each DPCH
1/8 of Base Station output power
Data content of DPCH
real life
(sufficient irregular) |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.7.4.2 Procedure | 1) Measure the power of the spurious emissions by applying the measuring equipment with the settings as specified in following table. The characteristics of the measurement filter with the bandwidth 1.28 MHz shall be RRC with roll-off = 0,22. The characteristics of the measurement filters with bandwidths 100 kHz and 1 MHz shall be approximately Gaussian (typical spectrum analyzer filter). The center frequency of the filters shall be stepped in contiguous steps over the frequency bands as specified in following table. The time duration of each step shall be sufficiently long to capture one transmit time slot.
2) If the BS is equipped with more than one Rx port, interchange the connections of the BS Rx ports and repeat the measurement according to (1).
Table 8.17: Measurement equipment settings
Stepped frequency range
Measurement bandwidth
Step width
Note
Detection mode
9 kHz – 1 GHz
100 kHz
100 kHz
true RMS
1 GHz – 1,900 GHz
1 MHz
1 MHz
With the exception of frequencies between 4 MHz below the first carrier frequency and 4 MHz above the last carrier frequency used by the BS
1,900 GHz – 1,980 GHz
1.28 MHz
200 kHz
1,980 GHz – 2,010 GHz
1 MHz
1 MHz
2,010 GHz – 2,025 GHz
1.28 MHz
200 kHz
2,025 GHz – 12,75 GHz
1 MHz
1 MHz |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.7.5 Test requirements | The spurious emissions measured according to subclause 8.4.7.4.2 shall not exceed the limits specified in subclause 8.4.7.2. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.4.7.6 Explanation difference | For the 1.28 Mcps chip rate TDD option, one frame(10ms) consists of two subframes(5ms), and one subframe consists of 7 timeslots, the structure of subframe is shown in section 7.2.1 of TR 25.928. So the number of timeslot i should be 0, 1,…,6. In addition, for the 1.28 Mcps chip rate TDD option, the DL reference measurement channel for 144kbits/s need two timeslots, each consists of 8 DPCH(SF=16).So the number of DPCH in each active TS should be 8.
Due to the smaller bandwidth in low chip rate TDD the measurement bandwidth is changed. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5 Performance requirements | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.1 General | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.2 Demodulation in static propagation conditions | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.2.1 Demodulation of DCH | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.2.1.1 Definition and applicability | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.2.1.2 Conformance requirements | For the parameters specified in table 8.18, the BLER should not exceed the piece-wise linear BLER curve specified in table 8.19.
Table 8.18: Parameters in static propagation conditions for 1.28 Mcps TDD option
Parameters
Unit
Test 1
Test 2
Test 3
Test 4
Number of DPCHo
4
1
1
0
Spread factor of DPCHo
8
8
8
dB
-7
-7
-7
–
Ioc
dBm/1.28 MHz
-91
Information Data Rate
kbps
12,2
64
144
384
Table 8.19: Performance requirements in AWGN channel.
Test Number
[dB]
BLER
1
0.6
10-2
2
-0.9
10-1
-0.4
10-2
3
-0.3
10-1
-0.1
10-2
4
0.5
10-1
0.6
10-2
The reference for this requirement is TR 25.945 subclause 6.4.2. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.2.1.3 Test purpose | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.2.1.4 Method of test | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.2.1.4.1 Initial conditions | Connect the BS tester (UE simulator) generating the wanted signal and a set of interference generators to both BS antenna connectors for diversity reception via a combining network. The set of interference generators comprises a number of CDMA generators, each representing an individual intracell interferer (subsequently called DPCH0 generators) that the DPCH0s are synchronous, and an additional band-limited white noise source, simulating interference from other cells. Each DPCH0 generator shall produce an interfering signal that is equivalent to a valid 1.28 Mcps TDD signal with spreading factor 8, using the same time slot(s) than the wanted signal and applying the same cell-specific scrambling code. The number of the DPCH0 generators used in each test is given in table 8.18. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.2.1.4.2 Procedure | 1) Adjust the power of the band-limited white noise source in such a way that its power spectral density measured at the BS antenna connector takes on the value Ioc as specified in table 8.18.
2) For a given test defined by the information data rate and the BLER objective, set the power of each DPCH0 measured at the BS antenna connector during the active time slots to the value specified in table 8.20.
3) Set up a call between the BS tester generating the wanted signal and the BS. The characteristics of the call shall be configured according to the information data rate to be provided and the corresponding UL reference measurement channel defined in Annex 8.A. Depending on the information data rate, the UL reference measurement channel makes use of one or two Dedicated Physical Channels (DPCH1 and DPCH2) with different spreading factors SF. The power(s) of DPCH1 and DPCH2 (if applicable) measured at the BS antenna connector during the active time slots shall be set to the value(s) given in table 8.20.
4) Measure the BLER of the wanted signal at the BS receiver.
Table 8.20: Parameters of DPCH0 and the wanted signal
Test Number
BLER objective
Number of DPCH0
Power of each DPCH0 measured at the BS antenna connector [dBm]
Parameters of the wanted signal
DPCH
SF
Power measured at the BS antenna connector [dBm]
1
10-2
4
-97.4
DPCH1
8
-97.4
2
10-1
1
-98.9
DPCH1
2
-92.9
10-2
1
-98.4
DPCH1
2
-92.5
3
10-1
1
-98.3
DPCH1
2
-92.3
10-2
1
-98.1
DPCH1
2
-92.1
4
10-1
0
–
DPCH1
8
-97.5
DPCH2
2
-91.5
10-2
0
–
DPCH1
8
-97.4
DPCH2
2
-91.4 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.2.1.5 Test requirements | The BLER measured according to subclause 8.5.2.1.4.2 shall not exceed the limits specified in table 8.19. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.2.1.6 Explanation difference | For the 1.28 Mcps chip rate TDD option, one frame(10ms) consists of two subframes(5ms), and one subframe consists of 7 timeslots, (the structure of subframe is shown in TR 25.928). Considering the chip rate, the burst structure of 1.28 Mcps TDD for normal traffic is different from that of 3.84 Mcps TDD option, (the burst structure for normal traffic is shown in TR 25.928). So the propagation conditions, service mapping and simulation assumption of the measurement channel 12.2kps, 64pks, 144kps and 384kps should be different from those of 3.84 Mcps TDD option. As a result, the relevant parameters should be different. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3 Demodulation of DCH in multipath fading conditions | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.1 Multipath fading Case 1 | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.1.1 Definition and applicability | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.1.2 Conformance requirements | For the parameters specified in table 8.21, the BLER should not exceed the piece-wise linear BLER curve specified in table 8.22.
Table 8.21: Parameters multipath Case 1 channel for 1.28 Mcps TDD option
Parameters
Unit
Test 1
Test 2
Test 3
Test 4
Number of DPCHo
4
1
1
0
Spread factor of DPCHo
8
8
8
dB
-7
-7
-7
–
Ioc
dBm/1.28 MHz
-91
Information Data Rate
kbps
12,2
64
144
384
Table 8.22: Performance requirements multipath Case 1 channel
Test Number
[dB]
BLER
1
10.4
10-2
2
5.3
10-1
9.4
10-2
3
5.7
10-1
10.1
10-2
4
6.0
10-1
10.0
10-2
The reference for this requirement is subclause 6.4.3. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.1.3 Test purpose | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.1.4 Method of test | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.1.4.1 Initial conditions | 1) Connect the BS tester (UE simulator) generating the wanted signal and a set of interference generators to both BS antenna connectors for diversity reception via a combining network. The set of interference generators comprises a number of CDMA generators, each representing an individual intracell interferer (subsequently called DPCH0 generators) that the DPCH0s are synchronous, and an additional band-limited white noise source, simulating interference from other cells. Each DPCH0 generator shall produce an interfering signal that is equivalent to a valid 1.28 Mcps TDD signal with spreading factor 8, using the same time slot(s) than the wanted signal and applying the same cell-specific scrambling code. The number of the DPCH0 generators used in each test is given in table 8.21.
2) The wanted signal produced by the BS tester and the interfering signals produced by the DPCH0 generators are individually passed through independent Multipath Fading Simulators (MFS) before entering the combining network. Each MFS shall be configured to simulate multipath fading Case 1. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.1.4.2 Procedure | 1) Adjust the power of the band-limited white noise source in such a way that its power spectral density measured at the BS antenna connector takes on the value Ioc as specified in table 8.21.
2) For a given test defined by the information data rate and the BLER objective, set the power of each DPCH0 measured at the BS antenna connector during the active time slots to the value specified in table 8.21.
3) Set up a call between the BS tester generating the wanted signal and the BS. The characteristics of the call shall be configured according to the information data rate to be provided and the corresponding UL reference measurement channel defined in Annex C.3. Depending on the information data rate, the UL reference measurement channel makes use of one or two Dedicated Physical Channels (DPCH1 and DPCH2) with different spreading factors SF. The power(s) of DPCH1 and DPCH2 (if applicable) measured at the BS antenna connector during the active time slots shall be set to the value(s) given in table 8.23.
4) Measure the BLER of the wanted signal at the BS receiver.
Table 8.23: Parameters of DPCH0 and the wanted signal
Test Number
BLER objective
Number of DPCH0
Power of each DPCH0 measured at the BS antenna connector [dBm]
Parameters of the wanted signal
DPCH
SF
Power measured at the BS antenna connector [dBm]
1
10-2
4
-87.6
DPCH1
8
-87.6
2
10-1
1
-92.7
DPCH1
2
-86.7
10-2
1
-88.6
DPCH1
2
-82.6
3
10-1
1
-92.3
DPCH1
2
-86.3
10-2
1
-87.9
DPCH1
2
-81.9
4
10-1
0
–
DPCH1
8
-92.0
DPCH2
2
-86.0
10-2
0
–
DPCH1
8
-88.0
DPCH2
2
-82.0 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.1.5 Test requirements | The BLER measured according to subclause 8.5.3.1.4.2 shall not exceed the limits specified in table 8.22. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.1.6 Explanation difference | For the 1.28 Mcps chip rate TDD option, one frame(10ms) consists of two subframes(5ms), and one subframe consists of 7 timeslots, (the structure of subframe is shown in TR 25.928). Considering the chip rate, the burst structure of 1.28 Mcps TDD for normal traffic is different from that of 3.84 Mcps TDD option, (the burst structure for normal traffic is shown in TR 25.928). So the propagation conditions, service mapping and simulation assumption of the measurement channel 12.2kps, 64pks, 144kps and 384kps should be different from those of 3.84 Mcps TDD option. As a result, the relevant parameters should be different. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.2 Multipath fading Case 2 | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.2.1 Definition and applicabily | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.2.2 Conformance requirements | For the parameters specified in table 8.24, the BLER should not exceed the piece-wise linear BLER curve specified in table 8.25.
Table 8.24: Parameters multipath Case 2 channel for 1.28 Mcps TDD option
Parameters
Unit
Test 1
Test 2
Test 3
Test 4
Number of DPCHo
4
1
1
0
Spread factor of DPCHo
8
8
8
dB
-7
-7
-7
–
Ioc
dBm/1.28 MHz
-91
Information Data Rate
kbps
12,2
64
144
384
Table 8.25: Performance requirements multipath Case 2 channel.
Test Number
[dB]
BLER
1
6.7
10-2
2
3.6
10-1
5.9
10-2
3
4.2
10-1
6.3
10-2
4
4.6
10-1
6.0
10-2
The reference for this requirement is subclause 6.4.3. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.2.3 Test purpose | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.2.4 Method of test | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.2.4.1 Initial conditions | 1) Connect the BS tester (UE simulator) generating the wanted signal and a set of interference generators to both BS antenna connectors for diversity reception via a combining network. The set of interference generators comprises a number of CDMA generators, each representing an individual intracell interferer (subsequently called DPCH0 generators) that the DPCH0s are synchronous, and an additional band-limited white noise source, simulating interference from other cells. Each DPCH0 generator shall produce an interfering signal that is equivalent to a valid 1.28 Mcps TDD signal with spreading factor 8, using the same time slot(s) than the wanted signal and applying the same cell-specific scrambling code. The number of the DPCH0 generators used in each test is given in table 8.24.
2) The wanted signal produced by the BS tester and the interfering signals produced by the DPCH0 generators are individually passed through independent Multipath Fading Simulators (MFS) before entering the combining network. Each MFS shall be configured to simulate multipath fading Case 2. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.2.4.2 Procedure | 1) Adjust the power of the band-limited white noise source in such a way that its power spectral density measured at the BS antenna connector takes on the value Ioc as specified in table 8.24.
2) For a given test defined by the information data rate and the BLER objective, set the power of each DPCH0 measured at the BS antenna connector during the active time slots to the value specified in table 8.26.
3) Set up a call between the BS tester generating the wanted signal and the BS. The characteristics of the call shall be configured according to the information data rate to be provided and the corresponding UL reference measurement channel defined in Annex C.3. Depending on the information data rate, the UL reference measurement channel makes use of one or two Dedicated Physical Channels (DPCH1 and DPCH2) with different spreading factors SF. The power(s) of DPCH1 and DPCH2 (if applicable) measured at the BS antenna connector during the active time slots shall be set to the value(s) given in table 8.26.
4) Measure the BLER of the wanted signal at the BS receiver.
Table 8.26: Parameters of DPCH0 and the wanted signal
Test Number
BLER objective
Number of DPCH0
Power of each DPCH0 measured at the BS antenna connector [dBm]
Parameters of the wanted signal
DPCH
SF
Power measured at the BS antenna connector [dBm]
1
10-2
4
-91.3
DPCH1
8
-91.3
2
10-1
1
-94.4
DPCH1
2
-88.4
10-2
1
-92.1
DPCH1
2
-86.1
3
10-1
1
-93.8
DPCH1
2
-87.8
10-2
1
-91.7
DPCH1
2
-85.7
4
10-1
0
–
DPCH1
8
-93.4
DPCH2
2
-87.4
10-2
0
–
DPCH1
8
-92.0
DPCH2
2
-86.0 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.2.5 Test requirements | The BLER measured according to subclause 8.5.3.2.4.2 shall not exceed the limits specified in table 8.25. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.2.6 Explanation difference | For the 1.28 Mcps chip rate TDD option, one frame(10ms) consists of two subframes(5ms), and one subframe consists of 7 timeslots, (the structure of subframe is shown in TR 25.928). Considering the chip rate, the burst structure of 1.28 Mcps TDD for normal traffic is different from that of 3.84 Mcps TDD option, (the burst structure for normal traffic is shown in TR 25.928). So the propagation conditions, service mapping and simulation assumption of the measurement channel 12.2kps, 64pks, 144kps and 384kps should be different from those of 3.84 Mcps TDD option. As a result, the relevant parameters should be different. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.3 Multipath fading Case 3 | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.3.1 Definition and applicability | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.3.2 Conformance requirements | For the parameters specified in table 8.27, the BLER should not exceed the piece-wise linear BLER curve specified in table 8.28.
Table 8.27: Parameters multipath Case 3 channel for 1.28 Mcps TDD option
Parameters
Unit
Test 1
Test 2
Test 3
Test 4
Number of DPCHo
4
1
1
0
Spread factor of DPCHo
8
8
8
dB
-7
-7
-7
–
Ioc
dBm/1.28 MHz
-91
Information Data Rate
kbps
12,2
64
144
384
Table 8.28: Performance requirements multipath Case 3 channel.
Test Number
[dB]
BLER
1
5.6
10-2
2
3.2
10-1
4.6
10-2
5.9
10-3
3
3.7
10-1
4.8
10-2
5.9
10-3
4
4.2
10-1
5.1
10-2
5.9
10-3
The reference for this requirement is subclause 6.4.3. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.3.3 Test purpose | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.3.4 Method of test | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.3.4.1 Initial conditions | 1) Connect the BS tester (UE simulator) generating the wanted signal and a set of interference generators to both BS antenna connectors for diversity reception via a combining network. The set of interference generators comprises a number of CDMA generators, each representing an individual intracell interferer (subsequently called DPCH0 generators) that the DPCH0s are synchronous, and an additional band-limited white noise source, simulating interference from other cells. Each DPCH0 generator shall produce an interfering signal that is equivalent to a valid 1.28 Mcps TDD signal with spreading factor 8, using the same time slot(s) than the wanted signal and applying the same cell-specific scrambling code. The number of the DPCH0 generators used in each test is given in table 8.27.
2) The wanted signal produced by the BS tester and the interfering signals produced by the DPCH0 generators are individually passed through independent Multipath Fading Simulators (MFS) before entering the combining network. Each MFS shall be configured to simulate multipath fading Case 3. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.3.4.2 Procedure | 1) Adjust the power of the band-limited white noise source in such a way that its power spectral density measured at the BS antenna connector takes on the value Ioc as specified in table 8.27.
2) For a given test defined by the information data rate and the BLER objective, set the power of each DPCH0 measured at the BS antenna connector during the active time slots to the value specified in table 8.29.
3) Set up a call between the BS tester generating the wanted signal and the BS. The characteristics of the call shall be configured according to the information data rate to be provided and the corresponding UL reference measurement channel defined in Annex C.3. Depending on the information data rate, the UL reference measurement channel makes use of one or two Dedicated Physical Channels (DPCH1 and DPCH2) with different spreading factors SF. The power(s) of DPCH1 and DPCH2 (if applicable) measured at the BS antenna connector during the active time slots shall be set to the value(s) given in table 8.29.
4) Measure the BLER of the wanted signal at the BS receiver.
Table 8.29: Parameters of DPCH0 and the wanted signal
Test Number
BLER objective
Number of DPCH0
Power of each DPCH0 measured at the BS antenna connector [dBm]
Parameters of the wanted signal
DPCH
SF
Power measured at the BS antenna connector [dBm]
1
10-2
4
-92.4
DPCH1
8
-92.4
2
10-1
1
-94.8
DPCH1
2
-88.8
10-2
1
-93.4
DPCH1
2
-87.4
10-3
1
-92.1
DPCH1
2
-86.1
3
10-1
1
-94.3
DPCH1
2
-88.3
10-2
1
-93.2
DPCH1
2
-87.2
10-3
1
-92.1
DPCH1
2
-86.1
4
10-1
0
–
DPCH1
8
-93.8
DPCH2
2
-87.8
10-2
0
–
DPCH1
8
-92.9
DPCH2
2
-86.9
10-3
0
–
DPCH1
8
-92.1
DPCH2
2
-86.1 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.3.5 Test requirements | The BLER measured according to subclause 8.5.3.3.4.2 shall not exceed the limits specified in table 8.28. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 8.5.3.3.6 Explanation difference | For the 1.28 Mcps chip rate TDD option, one frame(10ms) consists of two subframes(5ms), and one subframe consists of 7 timeslots, (the structure of subframe is shown in TR 25.928). Considering the chip rate, the burst structure of 1.28 Mcps TDD for normal traffic is different from that of 3.84 Mcps TDD option, (the burst structure for normal traffic is shown in TR 25.928). So the propagation conditions, service mapping and simulation assumption of the measurement channel 12.2kps, 64pks, 144kps and 384kps should be different from those of 3.84 Mcps TDD option. As a result, the relevant parameters should be different. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9 RF System scenarios | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.1 General | To develop the 3GPP standard, all the relevant scenarios need to be considered and the most critical cases need to be identified for the various aspects of operation so that final parameters can be derived to meet both service and implementation requirements.
Parameters possibly influenced by the scenarios are listed in 25.102, 25.105 and 25.945. These include, but are not limited to:
- Out of band emissions;
- Spurious emissions;
- Intermodulation rejection;
- Intermodulation between MS;
- Blocking. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.2 Methodology for coexistence studies 1.28 Mcps TDD/FDD | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.2.1 Overview of the simulation | The focus of the simulations in the first step is on coexistence of macro cells considering a vehicular environment (case 3: 120km/h) with speech users only.
The simulation is a Monte-Carlo based snapshot method calculating CDFs for C/I for large numbers of stochastic mobile distributions over cells (including power control).
It should be pointed out that no kind of synchronisation or coordination between the different systems is assumed in the coexistence simulations presented here and before.
The goal of simulation procedure is to determine the relative capacity loss of a victim system for a considered link (uplink or downlink) due to the presence of a second system – the interfering system. The reference for the capacity loss is the capacity of the victim system alone without the interfering system.
The capacity of the system is defined as the mean number of mobile stations per cell (i.e. the load in different cells may be different while the mean load, i.e. the total number of users in the simulated scenario, remains constant) that can be active at a time while the probability that the C/I of a mobile station falls below a given threshold C/Imin is below 5% (i.e the percentage of users which do not satisfy the C/I criteria for the speech service is 5%).
This definition is different but strongly related to the so-called “satisfied user criterion” (i.e. 98% of all users have to be able to complete their call without being dropped due to interference). However the “satisfied user criterion” requires the mapping of C/I to BER/BLER values and time-continuous simulation techniques, while here a Monte Carlo snap shot method is used.
The simulation is done in two steps:
At first Nsingle the capacity of the single operator case (i.e. only the victim system is present) is determined which means that the capacity depends on the co-channel interference (i.e. there is no adjacent channel interference).
The co-channel interference power itself depends on a number of parameters, especially on the number of mobiles, their position and their power control behaviour. Nsingle is the maximum mean number of mobiles per cell that can be active at a time in the single operator case.
The second step is the calculation of the multi operator capacity (i.e. victim and interferer system are present) which means the maximum mean number of mobiles per cell Nmulti in the victim system that can be active at a time considering co-channel and adjacent channel interference.
To determine Nmulti the multi operator simulation is started with Nmulti =Nsingle. Due to the additional adjacent channel interference the outage of users with C/I below the threshold C/Imin is increased compared to the single operator case (5%).
By decreasing Nmulti until the outage of 5% is reached again the capacity loss due to adjacent channel interference can be determined.
(The number of users in the interfering system is chosen in that way that a single operator simulation with this system would result in an outage of 5%.)
Finally the relative capacity loss can be calculated as |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.2.2 Simulation parameters | Table 9.1: Receiver Parameters
No.
parameter
FDD
1.28 Mcps TDD
MS
BS
MS
BS
RX1
Sensitivity
dBm
-117
-121
-108
-110
RX2
Noise figure
dB
9
5
9
7
RX3
Antenna gain (incl. losses)
dBi
0
11
0
11
RX4
ACS
dB
33
45
33
45
RX5
Min. CIR for
8kbps speech
dB
-15.7
-20.9
-1.5
-6.7
Table 9.2: Transmitter Parameters
No.
Parameter
FDD
1.28 Mcps TDD
MS
BS
MS
BS
TX1
Max. TX power
dBm
21
43 (27 per user)
30
43 (33 per user)
TX2
Min.Tx power per user
dBm
-50
27-25=2
-44
33-30=3
TX3
Antenna gain
dB
See RX3
TX4
PC dynamic range (1 code considered)
dB
Max –(-50)
= 71
25
Max –(-44)
= 74
30
TX5
ACLR
dB
33 (43)
45 (50)
33 (43)
40 (50)
This section compares the different RF parameters for FDD and 1.28 Mcps TDD which are used to describe the "victim system" and the "interferer system" in the coexistence simulation scenarios.
As a first step concerning the minimum C/I ratio values of the 1.28 Mcps TDD system the following results were used:
- UL (i.e. receiving BS): C/Imin = -4.9dB
- DL (i.e. receiving MS): C/Imin = 0.3dB.
Considering the mapping of the information data bits for the 12.2kbps service in UL and DL: 244 bits are mapped on 536 bits. We assumed in a first approach that for a 8kbps speech service 244*(8kbps/12.2kbps) bits are mapped on 536bits which results in a subtraction of 1.83dB for the both C/Imin values mentioned before which finally leads to the values in the table.
The ACLR and ACS values were taken from the specifications TS 25.101, TS 25.102, TS 25.104, TS 25.105 and this report.
For the investigations the cluster size of the 1.28 Mcps TDD, i.e. the reuse of a frequency channel, may be chosen to be 1 (like for 3.84 Mcps TDD) or 3 (since the 1.28 Mcps TDD has one third of the bandwidth of the 3.84 Mcps TDD). |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.2.3 Scenarios | Figure 9.1
The scenarios considered in this document refer to the frequency range about 1920 MHz where TDD and FDD are allocated in adjacent frequency bands.
Since the TDD band may be used for uplink (UL) or downlink (DL) communication 3 different scenarios are of interest depending on which station (MS or BS) is receiving (RX) or transmitting (TX):
- TDD MS (UL TX) causes interference to FDD BS (RX of UL)
- FDD MS (UL TX) causes interference to TDD BS (RX of UL)
- FDD MS (UL TX) causes interference to TDD MS (RX of DL)
The reason for the adjacent channel interference is the non-ideal rise of transmit and receive filter flanks so that a leakage of transmitted power is the adjacent frequency band and a reception from adjacent frequency bands can not entirely be prevented.
To limit this interaction between different frequency bands ACLR (adjacent channel leakage power ratio) requirements for the transmitter and ACS (adjacent channel selectivity) requirements for the receiver are specified (see section before).
In the simulation for the 1.28 Mcps TDD mode spectrum emission masks are used fulfilling the ACLR requirements given in the section before.
Due to the adjacent channel interference superimposing with the co-channel interference contributions received both in the used frequency band it might happen that at the considered receiver station the C/I ratio is below a minimum C/I ratio (see section before) which is necessary for the considered service.
The percentage of these users is called ‘outage’.
The used Monte-Carlo based snapshot simulator determines at first for a given outage or noise raise the mean maximum number of mobiles per cell which can be active without adjacent channel interference (single operator case).
Usually an outage of 5% or a noise raise of 6dB (especially for FDD BS as victim, i.e. UL in FDD) is considered for a realistic maximum load of the cell.
Afterwards the mean number of users for the same outage/noise raise (as in the single operator case) is calculated taking into account the co-channel and the additional adjacent interference of the interferer system (multi operator case). |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.3 Methodology for coexistence studies 1.28 Mcps TDD / 3.84 Mcps TDD | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.3.1 Overview of Simulation | Same as subsection 9.2.1 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.3.2 Simulation parameters | This section compares the different simulation parameters for 3.84 Mcps TDD and 1.28 Mcps TDD which are used to describe the ‚victim system‘ and the ‚interferer system‘ in the coexistence simulation scenarios.
Table 9.3: General Parameters
No.
Parameter
a. 3.84 Mcps TDD
b. 1.28 Mcps TDD
MS
BS
MS
BS
P1
Chip rate
Mcps
3.84
1.28
P2
Frame length
ms; chip
10ms; 38400
10ms; 12800
P3
Slot length
ms;chip
666.666µs; 2560
675µs; 864
P4
Slots per frame
1
15
14
(+ pilots and guard period)
P5
Chip length
Ms
260.41666ns
781.25ns
P6
Sfmax
1
16
16
P7
Sfmin
1
1
1
P8
Size of data symbol alphabet
1
4 (QPSK)
4 (QPSK)
P9
No. of codes per TS
1
12
16
P10
No. of codes used for an 8kbps speech service
1
UL: 1x SF=16
DL: 1x SF=16
UL: 1x SF=16
DL: 1x SF=16
P11
User bandwidth
MHz
3.84
1.28
P12
Channel spacing
MHz
5
1.6
P13
Antenna position over ground
M
MS: 1.5m
BS: antenna height (15m) + average roof top level (12m) =27m
P14
Considered coverage area
Cell radius in m
Macro: 500m
P15
Considered cluster size
1
-
1
-
1
P16
Minimum coupling loss (MCL)
DB
BS-MS: 70, MS-MS: 35
BS-MS: 70, MS-MS: 35
Table 9.4: Receiver Parameters
No.
Parameter
a. 3.84 Mcps TDD
b. 1.28 Mcps TDD
MS
BS
MS
BS
RX1
Sensitivity
DBm
-105
-109
-108
-110
RX2
Noise figure
DB
9
5
9
7
RX3
Antenna gain (incl. losses)
DBi
0
11
0
11
RX4
ACS
DB
33
45
33
45
RX5
Min. CIR for
8kbps speech
DB
-5.6
-8.1
-1.5
-6.7
Table 9.5: Transmitter Parameters
No.
Parameter
a. 3.84 Mcps TDD
b. 1.28 Mcps TDD
MS
BS
MS
BS
TX1
Max. TX power
DBm
30
43 (36 per user)
30
43 (33 per user)
TX2
Min.Tx power per user
DBm
-44
36-30=6
-44
33-30=3
TX3
Antenna gain
DB
See RX3
TX4
PC dynamic range (1 code considered)
DB
Max –(-44)
= 74
30
Max –(-44)
= 74
30
TX5
ACLR
DB
33 (43)
45 (50)
33 (43)
40 (50)
As a first step concerning the minimum C/I ratio values of the 1.28 Mcps TDD system for the 8kbps speech service these results for a 12.2kbps service for case 3 were taken:
- UL (i.e. receiving BS): C/Imin = -4.9dB
- DL (i.e. receiving MS): C/Imin = 0.3dB.
Considering the mapping of the information data bits for the 12.2kbps service in UL and DL: 244 bits are mapped on 536 bits.
For an 8kbps speech service we assumed in a first approach that:
244 x (8kbps / 12.2kbps) bits are mapped on 536bits
which results in a subtraction of 1.83dB for the both C/Imin values mentioned before which finally lead to the values in the table.
For the 3.84 Mcps TDD system the minimum C/I requirements were taken from [8].
The ACLR and ACS values were taken from the specifications 25.102, 25.105 for 3.84 Mcps TDD and the report 25.945 for 1.28 Mcps TDD.
The cluster size of the 1.28 Mcps TDD, i.e. the reuse of a frequency channel, may be chosen to be 1 (like for 3.84 Mcps TDD) or 3 (since the 1.28 Mcps TDD has one third of the bandwidth of the 3.84 Mcps TDD). In our investigations we take cluster=1 as a first approach. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.3.3 Scenarios | Figure 9.2
The scenarios considered in this section refer to the frequency 1915MHz where 1.28 Mcps TDD and 3.84 Mcps TDD may be allocated in adjacent frequency bands.
In a first step the 1.28 Mcps TDD system is assumed to be a victim for ajacent channel interference of a 3.84 Mcps TDD system.
Since the TDD band may be used for uplink (UL) or downlink (DL) communication 3 different scenarios are of interest depending on which station (MS or BS) is receiving (RX) or transmitting (TX):
- 3.84 Mcps TDD MS (UL TX) causes interference to 1.28 Mcps TDD BS (RX of UL)
- 3.84 Mcps TDD MS (UL TX) causes interference to 1.28 Mcps TDD MS (RX of DL)
- 3.84 Mcps TDD BS (DL TX) causes interference to 1.28 Mcps TDD MS (RX of DL)
In a second step the 3.84 Mcps TDD system is the victim system suffering from adjacent channel interference of the 1.28 Mcps TDD system. Here 3 further cases need to be investigated:
- 1.28 Mcps TDD MS (UL TX) causes interference to 3.84 Mcps TDD BS (RX of UL)
- 1.28 Mcps TDD MS (UL TX) causes interference to 3.84 Mcps TDD MS (RX of DL)
- 1.28 Mcps TDD BS (DL TX) causes interference to 3.84 Mcps TDD MS (RX of DL) |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.4 Methodology for coexistence studies 1.28 Mcps TDD / 1.28 Mcps TDD | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.4.1 Overview of Simulation | Same as subsection 9.2.1 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.4.2 Simulation parameters | Same as subsection 9.3.2 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.4.3 Scenarios | Figure 9.3
In this section a scenario of two 1.28 Mcps TDD operators in the same geographic area is investigated. For both systems apart from the frequency bands the same rf parameters and again no synchronisation or coordination is assumed.
Since the TDD band may be used for uplink (UL) or downlink (DL) communication 3 different scenarios are of interest depending on which station (MS or BS) is receiving (RX) or transmitting (TX):
- 1.28 Mcps TDD MS (UL TX) causes interference to 1.28 Mcps TDD BS (RX of UL)
- 1.28 Mcps TDD MS (UL TX) causes interference to 1.28 Mcps TDD MS (RX of DL)
- 1.28 Mcps TDD BS (DL TX) causes interference to 1.28 Mcps TDD MS (RX of DL) |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.5 Results, implementation issues and recommendations | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.5.1 1.28 Mcps TDD /FDD | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.5.1.1 Simulation results | The results for the relative capacity loss are summarized in the table below.
Table 9.6
victim (receiver)
interferer (transmitter)
rel. capacity loss
FDD BS
1.28 Mcps TDD MS (cluster=1)
<2%
1.28 Mcps TDD BS
(cluster=1)
FDD MS
<2%
1.28 Mcps TDD MS
(cluster=1)
FDD MS
<2%
1.28 Mcps TDD MS
(cluster=3)
FDD MS
<3% |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.5.1.2 Conclusion | The focus of these investigations is on speech users in macro cells for a vehicular propagation environment.
The results show reasonable capacity loss values, even without coordination or time alignment between the victim and the interferer system. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 9.5.2 1.28 Mcps TDD / 3.84 Mcps TDD |
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