4.6F Coding/Multiplexing for HS-SCCH type 6 (1.28 Mcps TDD only)
25.2223GPPMultiplexing and channel coding (TDD)Release 17TS
HS-SCCH shall be of type 6 when the following two conditions are both met:
– the variable HS_DSCH_SPS_STATUS is TRUE, and
– UE is configured in MIMO mode while the variable MIMO SF mode for HS-PDSCH dual stream is SF1/SF16.
HS-SCCH type 6 is used to allocate semi-persistent HS-PDSCH resources for the initial transmissions. The following information is transmitted by means of the HS-SCCH type 6 physical channels.
– Type flag (3 bits): xflag,1, xflag,2, xflag,3
– Channelisation-code-set information (8 bits): xccs,1, xccs,2, …, xccs, 8
– Time slot information (5bits): xts,1, xts,2, …, xts,5
– Modulation scheme information (1 bit): xms,1
– Resource repetition pattern index (2bits): xrrpi,1, xrrpi,2
– Transport-block size information (2 bits): xtbs,1, xtbs,2
– HS-SICH indicator (2bits): xHI,1, xHI,2
– HS-SCCH cyclic sequence number (3 bits): xhcsn,1, xhcsn,2, xhcsn,3
– Reserved (8 bits): xres,1, xres,2,…, xres,8
– UE identity (16 bits): xue,1, xue,2, …, xue,16
– Redundancy and constellation version (0 bit ): Xrv =0 (see 4.6.1.4)
For an HS-SCCH order type B,
– xflag,1, xflag,2, xflag,3, xccs,1, xccs,2, xccs,3 , xccs,4, xccs,5, xccs,6, xccs,7, xccs,8 are reserved
– xts,1, xts,2, …, xts,5 shall be set to ‘00000’
– xms,1, xrrpi,1, xrrpi,2 shall be set to xodt,1, xodt,2, xodt,3
– xtbs,1, xtbs,2, xHI,1, xHI,2, , xhcsn,1, xhcsn,2, xhcsn,3, xres,1, xres,2, xres,3, xres,4, xres,5, xres,6, xres,7, xres,8 are reserved
where xodt,1, xodt,2, xodt,3 are defined in subclause 4.6J.
The following coding/multiplexing steps for HS-SCCH type 6 can be identified:
– multiplexing of HS-SCCH type 6 information (see subclause 4.6F.2)
– CRC attachment for HS-SCCH type 6 (see subclause 4.6F.3);
– channel coding for HS-SCCH type 6 (see subclause 4.6F.4);
– rate matching for HS-SCCH type 6 (see subclause 4.6F.5);
– interleaving for HS-SCCH type 6 (see subclause 4.6F.6);
– mapping to physical channels for HS-SCCH type 6 (see subclauses 4.6F.7 and 4.6F.8).
The general coding/multiplexing flow for HS-SCCH type 6 is shown in Figure 19E.
Figure 19E: Coding and Multiplexing for HS-SCCH type 6
4.6F.1 HS-SCCH type 6 information field mapping
4.6F.1.1 Type flag mapping
The type flag xflag,1, xflag,2, xflag,3 are mapped such that xflag,1 =‘1’corresponds to the MSB and xflag,3 =‘0’ to the LSB. The bit xflag,2 is reserved. The type flag is used to distinguish HS-SCCH type 6 from other types.
4.6F.1.2 Channelisation code set information mapping
The mapping of the channelisation code set information xccs,1, xccs,2, xccs,3, xccs,4, xccs,5, xccs,6, xccs,7, xccs,8 is performed according to section 4.6.1.1.1.
4.6F.1.3 Timeslot information mapping
The mapping of the time slot information xts,1, xts,2, … xts,5 is performed according to section 4.6.1.2.1.
4.6F.1.4 Modulation scheme information mapping
The mapping of the modulation scheme information xms,1 is performed according to table 17 in section 4.6.1.3.
4.6F.1.5 Resource repetition pattern index mapping
The mapping of the resource repetition pattern index xrrpi,1, xrrpi,2 is performed according to section 4.6B.1.2.
4.6F.1.6 Transport block size index mapping
The mapping of the transport-block size information xtbs,1, xtbs,2 is performed according to section 4.6B.1.4.
4.6F.1.7 HS-SICH indicator mapping
The mapping of the HS-SICH indicator xHI,1, xHI,2 is performed according to section 4.6B.1.9.
4.6F.1.8 HS-SCCH cyclic sequence number
The HS-SCCH cyclic sequence number xhcsn,1, xhcsn,2, xhcsn,3 is mapped such that xhcsn,1 corresponds to the MSB and xhcsn,3 to the LSB.
4.6F.1.9 UE identity
The UE identity is the HS-DSCH Radio Network Identifier (H-RNTI) defined in [12]. This is mapped such that xue,1 corresponds to the MSB and xue,16 to the LSB, cf. [14].
4.6F.2 Multiplexing of HS-SCCH type 6 information
The information carried on the HS-SCCH type 6 is multiplexed onto the bits according to the following rule :
4.6F.3 CRC attachment for HS-SCCH type 6
The sequence of bits , is calculated according to subclause 4.6.3.
4.6F.4 Channel coding for HS-SCCH type 6
Channel coding for the HS-SCCH type 6 shall be done with the general method described in 4.2.3 with the following specific parameters:
The rate 1/3 convolutional coding shall be used for HS-SCCH type 6.
4.6F.5 Rate matching for HS-SCCH type 6
Rate matching for HS-SCCH type 6 shall be done with the general method described in 4.6.5.
4.6F.6 Interleaving for HS-SCCH type 6
Interleaving for HS-SCCH type 6 shall be done with the general method described in 4.2.11.1.
4.6F.7 Physical Channel Segmentation for HS-SCCH type 6
Physical channel segmentation for HS-SCCH type 6 shall be done with the general method described in 4.2.10. The HS-SCCH consists of two physical channels HS-SCCH1 and HS-SCCH2.
4.6F.8 Physical channel mapping for HS-SCCH type 6
Physical channel mapping for the HS-SCCH type 6 shall be done with the general method described in subclause 4.2.12.