 2nd interleaving Physical channel mapping PCCPCH Radio frame Radio frame Figure 4.54 Coding the FDD downlink BCH. 4.6.15.2 Speech Channel Coding in the FDD Mode We next illustrate the coding of transport channel for CS data or speech services. Notice how this example applies to 12.2 kbps AMR speech. Table 4.44 and Figure 4.55 illustrate the key parameters for the 12.35 kbps AMR speech data. See the number of TrChs coding example when compared to the control channel in the previous example. Table 4.44 Parameter Examples for 12.35 kbps Speech Information The number of TrChs Transport block size 81, 103, and 60 bits 12 bits (attached only to TrCh#1) Coding coding rate = 1/3 for TrCh#1, 2 coding rate = 1/2 for TrCh#3 20 ms The UMTS Network and Radio Access Technology Transport block TrCh#1 TrCh#2 TrCh#3 CRC attachment Tail bit attachment Convolutional coding R=1/3, 1/2 Rate matching 1st interleaving 303+NRM1 333 +NRM2 136 +NRM3 Radio frame segmentation NRF1 = (303 +NRM1)/2 NRF2 = (333+ NRM2)/2 NRF3 = (136+ NRM3)/2 To TrCh Multiplexing Figure 4.55 Channel coding and multiplexing 12.2 kbps speech. 4.6.15.3 Coding FDD 64/128/384 kbps Packet Data Channels Table 4.45 and Figure 4.56 show the key coding and multiplexing parameters for the aforementioned packet data channels. Here the number of blocks used logically depends on the transmission data rate required. Notice also that when coding these transport channels we use turbo coding instead of the convolution codes in the preceding examples. Table 4.45 Packet Data Parameters for 64/128/384 kbps Services The number of TrChs Transport block size 640 bits Transport block 64 kbps 640 X B bits (B = 0,1) Size size 128 kbps 640 X B bits (B = 0, 1, 2) 384 kbps 640 X B bits (B = 0, 1, 2, ..., 6) 16 bits Coding Turbo coding, coding rate = 1/3 10 ms The UTRA Physical Layer Design Transport block CRC attachment concatenation 656* B Turbo coding R=1/3 1968*B Tail bit attachment Rate matching 1968*B Insertion of DTX 1968* B+12+NRM indication 1st interleaving 1968* B+12+N+NDL 1968* B 