4.7.3A Channel coding for HS-DPCCH when the UE is not configured in MIMO mode in any cell and Secondary_Cell_Enabled is 1 and Secondary_Cell_Active is 1
25.2123GPPMultiplexing and channel coding (FDD)Release 17TS
Two forms of channel coding are used, one for the composite channel quality indication (CQI) and another for the composite HARQ-ACK (acknowledgement).
4.7.3A.1 Channel coding for the composite HS-DPCCH HARQ-ACK
The composite HARQ acknowledgement message to be transmitted, as defined in [4], shall be coded to 10 bits as shown in Table 15C.1. The output is denoted w0, w1,…w9.
Table 15C.1: Channel coding of HARQ-ACK when the UE is not configured in MIMO mode in a pair of serving HS-DSCH cells and Secondary_Cell_Enabled is 1 and Secondary_Cell_Active is 1
|
HARQ-ACK |
w0 |
w1 |
w2 |
w3 |
w4 |
w5 |
w6 |
w7 |
w8 |
w9 |
|
|
HARQ-ACK when UE detects a single scheduled transport block on the serving HS-DSCH cell |
|||||||||||
|
ACK |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
|
NACK |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
HARQ-ACK when UE detects a single scheduled transport block on the secondary serving HS-DSCH cell |
|||||||||||
|
ACK |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
|
|
NACK |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
|
|
HARQ-ACK when UE detects a single scheduled transport block on each of the serving and secondary serving HS-DSCH cells |
|||||||||||
|
Response to transport block from serving HS-DSCH cell |
Response to transport block from secondary serving HS-DSCH cell |
||||||||||
|
ACK |
ACK |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
|
ACK |
NACK |
1 |
1 |
0 |
0 |
1 |
1 |
0 |
0 |
1 |
1 |
|
NACK |
ACK |
0 |
0 |
1 |
1 |
0 |
0 |
1 |
1 |
0 |
0 |
|
NACK |
NACK |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
|
PRE/POST indication |
|||||||||||
|
PRE |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
|
|
POST |
0 |
1 |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
0 |
|
4.7.3A.2 Channel coding for HS-DPCCH composite channel quality indication
4.7.3A.2.1 Composite channel quality indication bits
The composite CQI report is constructed from two individual CQI reports that are represented by CQI1 and CQI2. CQI1 corresponds to the serving HS-DSCH cell and CQI2 corresponds to the secondary serving HS-DSCH cell.
Each constituent CQI report uses values 0 … 30 in accordance with the definition of the CQI reporting procedure in [4]. The individual CQI values are converted from decimal to binary to map them to the channel quality indication bits (1 0 0 0 0) to (1 1 1 1 1) respectively. The information bit pattern (0 0 0 0 0) shall not be used in this release.
The channel quality indication bits corresponding to CQI1 are cqi10, cqi11, cqi12, cqi13, cqi14 (where cqi10 is LSB and cqi14 is MSB) and those corresponding to CQI2 are cqi20, cqi21, cqi22, cqi23, cqi24 (where cqi20 is LSB and cqi24 is MSB).
The composite CQI report is constructed according to the scheme depicted in Figure 20C
Figure 20C: Construction of composite CQI report
The two individual CQI reports are concatenated to form the composite channel quality indication according to the relation
4.7.3A.2.2 Block encoding of composite channel quality indication bits
The composite channel quality indication is coded using a (20,10) code. The code words of the (20,10) code are a linear combination of the 10 basis sequences denoted Mi,n defined in Table 15C.
The output code word bits bi are given by:
where i = 0, …, 19 and a0,…, a9 are defined in the previous subclause.