4.7.3 Channel coding for HS-DPCCH when the UE is configured in MIMO mode in the serving HS-DSCH cell and Secondary_Cell_Enabled is 0
25.2123GPPMultiplexing and channel coding (FDD)Release 17TS
Two forms of channel coding are used, one for the composite precoding control indication (PCI) and channel quality indication (CQI) and another for HARQ-ACK (acknowledgement).
4.7.3.1 Channel coding for HS-DPCCH HARQ-ACK
The HARQ acknowledgement message to be transmitted, as defined in [4], shall be coded to 10 bits as shown in Table 15B. The output is denoted w0, w1,…w9.
Table 15B: Channel coding of HARQ-ACK when the UE is configured in MIMO mode in the serving HS-DSCH cell and Secondary_Cell_Enabled is 0
HARQ-ACK |
w0 |
w1 |
w2 |
w3 |
w4 |
w5 |
w6 |
w7 |
w8 |
w9 |
|
HARQ-ACK in response to a single scheduled transport block |
|||||||||||
ACK |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
NACK |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
HARQ-ACK in response to two scheduled transport blocks |
|||||||||||
Response to primary transport block |
Response to secondary transport block |
||||||||||
ACK |
ACK |
1 |
0 |
1 |
0 |
1 |
1 |
1 |
1 |
0 |
1 |
ACK |
NACK |
1 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
1 |
1 |
NACK |
ACK |
0 |
1 |
1 |
1 |
1 |
0 |
1 |
0 |
1 |
1 |
NACK |
NACK |
1 |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
0 |
0 |
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 |
4.7.3.2 Channel coding for HS-DPCCH composite precoding control indication and channel quality indication
When the UE is configured in MIMO mode and single-stream restriction is not configured, two types of CQI reports shall be supported by the UE. According to the definition of the CQI reporting procedure in [4], type A CQI reports use values 0 … 255 and type B CQI reports use values 0 … 30, respectively. When the UE is configured in MIMO mode and single-stream restriction is configured, only type B shall be supported by the UE.
4.7.3.2.1 Bit mapping of Type A channel quality indication
In case a type A CQI shall be reported, the CQI values 0 … 255 as defined in [4] are converted from decimal to binary to map them to the channel quality indication bits (0 0 0 0 0 0 0 0) to (1 1 1 1 1 1 1 1), respectively. The channel quality indication bits are cqi0 , cqi1 , cqi2 , cqi3 , cqi4, cqi5, cqi6, cqi7 (where cqi0 is LSB and cqi7 is MSB).
4.7.3.2.2 Bit mapping of Type B channel quality indication
In case a type B CQI shall be reported, the CQI values 0 … 30 as defined in [4] 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 are cqi0, cqi1, cqi2, cqi3, cqi4 (where cqi0 is LSB and cqi4 is MSB).
4.7.3.2.3 Bit mapping of precoding control indication
According to the PCI definition in [4], the range of possible PCI values is 0 … 3. The PCI values 0 … 3 as defined in [4] are converted from decimal to binary to map them to the precoding control indication bits (0 0) to (1 1) respectively. The precoding control indication bits are pci0 , pci1 (where pci0 is LSB and pci1 is MSB).
4.7.3.2.4 Composite precoding control indication and channel quality indication bits
Two formats for composite PCI/CQI information words are possible depending on the type of the reported CQI value. The two formats shall be constructed according to the scheme depicted in Figure 20B.
Figure 20B: Construction of composite PCI/CQI report
In case a type A CQI shall be reported, the precoding control indication bits pci0 , pci1, and the channel quality indication bits cqi0 , cqi1 , cqi2 , cqi3 , cqi4, cqi5, cqi6, cqi7 are concatenated to the composite precoding control indication and channel quality indication bits according to the relation
In case a type B CQI shall be reported, the precoding control indication bits pci0 , pci1, and the channel quality indication bits cqi0 , cqi1 , cqi2 , cqi3 , cqi4 are concatenated to the composite precoding control indication and channel quality indication bits according to the relation
4.7.3.2.5 Block encoding of composite precoding control indication and channel quality indication bits
In case a type A CQI needs to be reported, the composite precoding control indication and 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 the table 15C below.
Table 15C: Basis sequences for channel encoding of composite PCI/CQI reports
i |
Mi,0 |
Mi,1 |
Mi,2 |
Mi,3 |
Mi,4 |
Mi,5 |
Mi,6 |
Mi,7 |
Mi,8 |
Mi,9 |
Mi,10 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
3 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
4 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
5 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
6 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
1 |
7 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
8 |
1 |
0 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
0 |
1 |
9 |
1 |
1 |
0 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
10 |
0 |
1 |
1 |
0 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
11 |
1 |
0 |
1 |
1 |
0 |
1 |
0 |
0 |
0 |
1 |
0 |
12 |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
0 |
0 |
0 |
0 |
13 |
1 |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
0 |
0 |
0 |
14 |
0 |
1 |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
0 |
1 |
15 |
0 |
0 |
1 |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
0 |
16 |
0 |
0 |
0 |
1 |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
17 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
0 |
1 |
1 |
1 |
18 |
0 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
0 |
1 |
0 |
19 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
The output code word bits bi are given by:
where i = 0, …, 19.
In case a type B CQI needs to be reported, the composite precoding control indication and channel quality indication is coded using a (20,7) code. The code words of the (20,7) code are a linear combination of the basis sequences denoted Mi,n defined in the table 15C for.
The output code word bits bi are given by:
where i = 0, …, 19.