WCDMA3G_TFCIMap
Description: TFCI mapping
Library: 3GPPFDD 10-99, Channel Coding
Class: SDFWCDMA3G_TFCIMap
Parameters
Name |
Description |
Default |
Sym |
Type |
Range |
|---|---|---|---|---|---|
ServNum |
service number |
1 |
NS |
int |
[1, ∞) |
Pin Inputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
1 |
TF |
input transport format |
multiple int |
2 |
TFMax |
input maximum transport format |
multiple int |
Pin Outputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
3 |
TFMaxOut |
output maximum transport format |
int |
4 |
TFCI |
output TFCI |
int |
Notes/Equations
- This model is used to implement transport format combination indicator (TFCI) mapping in the transmitting side. Each firing, one token of TFCI and NS tokens of TFMaxOut are produced when NS tokens of TF and NS tokens of TFMax are consumed. The default value for ServNum is 1.
- Model functions
TF and TFMax information is read from the input buffer.
TFCI mapping rule in the transmitting side is as follows:
If several variable-rate services S1, S2, ..., Sk are included within one CCTrCH (code composite transport channel). Each service Si has a set of possible transport format combination indicators TFi,1, TFi,2, ..., TFi,Li.
These service rate combinations are mapped to a certain service rate combination number, TFCI value m, in the following way:S1: TF1,1, TF1,2, ..., TF1,L1
S2: TF2,1, TF2,2, ..., TF2,L2
.
.
.
Sk: TFk,1, TFk,2, ..., TFk,Lk
This gives L=L1 xL2 x...xLk service rate combinations; therefore, L must be >1024 since the maximum TFCIBitsNum is 10.
where the service rate combinations SRCj corresponds to one TFj s and will be the integer from 0 to Lj -1.L=L1 xL2 x...xLk
m=0
for j=1 to K step 1
m = m x Lj + SRCj
end
Value of TFMaxOut is set as the value of read TFMax.
TFCI and TFMaxOut are read into the output buffer.
References
- 3GPP Technical Specification TS25.302 V3.1.0,"Services provided by the Physical Layer," October 1999.
- 3GPP Technical Specification TS25.212 V3.0.0,"Multiplexing and Channel Coding (FDD)," October 1999.
- ETRI, "TSGR1#5(99)582 TFCI Mapping Rule in the Transmitting Side," June 1999.