WCDMA3G_CodeBlkDeSeg
Description: Transport Block de-concatenation and code block de-segmentation
Library: 3GPPFDD 10-99, Channel Coding
Class: SDFWCDMA3G_CodeBlkDeSeg
Parameters
Name |
Description |
Default |
Type |
|---|---|---|---|
LinkDir |
link direction: Downlink, Uplink |
Downlink |
enum |
TrCHType |
transport channel type: DCH_8_kbps, DCH_16_kbps, DCH_32_kbps, DCH_64_kbps, DCH_128_kbps, DCH_256_kbps, DCH_512_kbps, DMCH_2_4_kbps, DMCH_12_2_kbps, DMCH_64_kbps, DMCH_144_kbps, DMCH_384_kbps, DMCH_2048_kbps, BCH_11_1_kbps, BCH_12_3_kbps |
DCH_8_kbps |
enum |
TTI |
transmission time interval: TTI_10ms, TTI_20ms, TTI_40ms, TTI_80ms |
TTI_10ms |
enum |
Pin Inputs:
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
1 |
in |
input code block data |
int |
2 |
TF|Input transport format |
int |
Pin Outputs:
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
3 |
out |
output data after deconcatenation and desegmentation |
int |
Notes/Equations
- This model is used to implement transport block de-concatenation and code block de-segmentation. Data of multiple code blocks are concatenated serially and filler bits at the end are punctured. The bit sequence is then segmented into transport blocks according to TTI. Input and output tokens are listed in the following table.
Input and Output Tokens
DCHType TTI In Input Tokens TF Input Tokens Out Output Tokens Downlink Uplink DCH_8_kbps 10 ms 96 104 1 96 20 ms 176 184 2 176 40 ms 336 344 4 336 80 ms 656 672 8 656 DCH_16_kbps 10 ms 184 184 1 176 20 ms 344 344 2 336 40 ms 672 672 4 656 80 ms 1320 1320 8 1296 DCH_32_kbps 10 ms 344 344 1 336 20 ms 672 672 2 656 40 ms 1320 1320 4 1296 80 ms 2628 2628 8 2576 DCH_64_kbps 10 ms 656 656 1 656 20 ms 1296 1296 2 1296 40 ms 2576 2576 4 2576 80 ms 5136 5136 8 5136 DCH_128_kbps 10 ms 1296 1296 1 1296 20 ms 2576 2576 2 2576 40 ms 5136 5136 4 5136 80 ms 10257 10257 8 10256 DCH_256_kbps 10 ms 2576 2576 1 2576 20 ms 5136 5136 2 5136 40 ms 10257 10257 4 10256 80 ms 20500 20500 8 20496 DCH_512_kbps 10 ms 5136 5136 1 5136 20 ms 10257 10257 2 10256 40 ms 20500 20500 4 20496 80 ms 40977 40977 8 40976 DMCH_2_4_kbps 40 ms 120 120 4 112 DMCH_12_2_kbps 20 ms 268 268 2 260 DMCH_64_kbps 20 ms 1296 1296 2 1296 DMCH_144_kbps 20 ms 2896 2896 2 2896 DMCH_384_kbps 20 ms 7696 7696 2 7696 DMCH_2048_kbps 20 ms 40977 2 40976 BCH_11_1_kbps 10 ms 135 1 127 BCH_12_3_kbps 20 ms 270 2 262 - Model functions
Input bits are read from the input buffer. The input transport format is read to determine which coding scheme is to be used.
Multiple input code blocks are concatenated serially according to the calculated number and size of the code block. The last filler bits are punctured. The following figure illustrates the code block position for different coding schemes.
Bits sequences after concatenation are de-segmented into transport blocks. In a W-CDMA system, only one transport block is produced within one TTI, so de-segmentation is performed on one transport block code only.
All data is output into the output buffer.
Position of Code Blocks for Different Channel Coding Schemes
References
- 3GPP Technical Specification TS25.212 V3.0.0,"Multiplexing and Channel Coding (FDD)," October 1999.
- 3GPP Technical Specification TS25.101 V3.0.0,"UE Radio transmission and Reception (FDD)," October 1999.
- 3GPP Technical Specification TS25.104 V3.0.0,"UTRA(BS) FDD: transmission and Reception," October 1999.