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): x_flag,1, x_flag,2, x_flag,3

– Channelisation-code-set information (8 bits): x_ccs,1, x_ccs,2, …, x_{ccs, 8}

– Time slot information (5bits): x_ts,1, x_ts,2, …, x_ts,5

– Modulation scheme information (1 bit): x_ms,1

– Resource repetition pattern index (2bits): x_rrpi,1, x_rrpi,2

– Transport-block size information (2 bits): x_tbs,1, x_tbs,2

– HS-SICH indicator (2bits): x_HI,1, x_HI,2

– HS-SCCH cyclic sequence number (3 bits): x_hcsn,1, x_hcsn,2, x_hcsn,3

– Reserved (8 bits): x_res,1, x_res,2,…, x_res,8

– UE identity (16 bits): x_ue,1, x_ue,2, …, x_ue,16

– Redundancy and constellation version (0 bit ): X_rv =0 (see 4.6.1.4)

For an HS-SCCH order type B,

– x_flag,1, x_flag,2, x_flag,3, x_ccs,1, x_ccs,2, x_ccs,3 , x_ccs,4, x_ccs,5, x_ccs,6, x_ccs,7, x_ccs,8 are reserved

– x_ts,1, x_ts,2, …, x_ts,5 shall be set to ‘00000’

– x_ms,1, x_rrpi,1, x_rrpi,2 shall be set to x_odt,1, x_odt,2, x_odt,3

– x_tbs,1, x_tbs,2, x_HI,1, x_HI,2, , x_hcsn,1, x_hcsn,2, x_hcsn,3, x_res,1, x_res,2, x_res,3, x_res,4, x_res,5, x_res,6, x_res,7, x_res,8 are reserved

where x_odt,1, x_odt,2, x_odt,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 x_flag,1, x_flag,2, x_flag,3 are mapped such that x_flag,1 =‘1’corresponds to the MSB and x_flag,3 =‘0’ to the LSB. The bit x_flag,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 x_ccs,1, x_ccs,2, x_ccs,3, x_ccs,4, x_ccs,5, x_ccs,6, x_ccs,7, x_ccs,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 x_ts,1, x_ts,2, … x_ts,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 x_ms,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 x_rrpi,1, x_rrpi,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 x_tbs,1, x_tbs,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 x_HI,1, x_HI,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 x_hcsn,1, x_hcsn,2, x_hcsn,3 is mapped such that x_hcsn,1 corresponds to the MSB and x_hcsn,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 x_ue,1 corresponds to the MSB and x_ue,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.