PDCCH相关DCI格式说明

1、 1 DCI信息1.1 格式0表1 格式0的内容格式0： 用于传输UL-SCH时序安排的信令内容长度Flag for format0/format1A differentiation1bit(0: format0；1: format1A)Frequency hopping flag 1 bit(1:跳频；0:不跳频)Resource block assignment and hopping resource allocationbitsModulation and coding scheme and redundancy version5 bitsNew data indicator1 bit

2、TPC command for scheduled PUSCH 2 bitsCyclic shift for DM RS3 bitsUL index（TDD模式上下行配置0）2 bits（FDD不存在）Downlink Assignment Index（DAI）（TDD模式上下行配置16）2 bits（FDD不存在）CQI request1 bit其中支持PUSCH跳频模式下：NUL_hop个MSB比特用来得到资源分配参数的具体值；个比特用来描述在上行子帧的第一个时隙中的资源分配参数。在PUSCH非跳频模式下：- 个比特用来描述在上行子帧的资源分配参数。协议中规定Format0的长度小于For

3、mat1A（包括任何添加bit）的时候，应在有效载荷的后面补零，使其等长。1.2 格式1表2 格式1的内容格式1：用于一个PDSCH码字的时序安排内容长度Resource allocation header(resource allocation type0/type1)1 bit0指示为Type0；1指示为Type1如果下行带宽小于或等于10PRBs，没有资源分配头域，资源分配方式默认为type0。Resource block assignmenttype0provide the resource allocationbitstype1indicate the selected resour

4、ce blocks subset bitsindicates a shift of the resource allcotion span1 bitprovide the resource allocationbitsModulation and coding scheme5 bitsHARQ process number3 bits(FDD),4 bits(TDD)New data indicator1 bitRedundancy version2 bitsTPC command for PUCCH 2 bitsDL Assignment Index（TDD模式所有配置，应用于上下行配置16

5、）2 bits（FDD不存在）其中，取决与下行资源块数，如下表所示RBG SizeSystem Bandwidth(P)110211 - 26327 - 64464 - 110 如果format 1的信息bit数为下表中任一数，则在format 1后附加一个或多个0bit使得format 1的信息bit数不为下表中任一数，且不等于format 0/1A的信息bit数。表 3 Ambiguous Sizes of Information Bits12, 14, 16 ,20, 24, 26, 32, 40, 44, 561.3 格式1A表4 格式1A的内容格式1A：用于紧凑PDSCH一码字时序安

6、排内容长度Flag for format0/format1A differentiation1 bitLocalized/Distributed VRB assignment flag1bitResource block assignmentLocal VRBresource allocation bitsDistributed VRB or if the DCI 1A CRC is scrambled by RA-RNTI, P-RNTI, or SI-RNTIresource allocation bitsotherIndicates ( value 0) or ( value 1)1 b

7、itresource allocation bitsModulation and coding scheme5 bitsHARQ process number3 bits(FDD),4 bits(TDD)New data indicator1 bitRedundancy version2 bitsTPC command for PUCCH2 bitsDL Assignment Index（TDD模式所有配置，应用于上下行配置16）2 bits（FDD不存在）format 1A可能用于由PDCCH激活的随机接入过程，包含如下域：- Localized/Distributed VRB assign

8、ment flag 1 bit（0）；- Resource block assignment bits（全为1）；- Preamble Index 6 bits- PRACH Mask Index 4 bits-其余bit全为0.- TPC command for PUCCH 2 bit,1）如果DCI 1A 的CRC是与RA-RNTI，P-RNTI，或SI-RNTI加扰，则一个bit保留，一个bit指示TBS表的列数：用于指示列数的bit为 0，= 2 ；否则= 3 2）否则两个bit用于指示TPC命令。- 新数据指示 1 bit 1）如果DCI 1A 的CRC是与RA-RNTI，P-RNT

9、I，或SI-RNTI加扰，若且L/D VRB分配标志置1，则该 bit指示gap 值：0指示；1指示，否则该比特保留。2）否则该 bit 根据36.321定义。注意，如果format1A的信息比特数少于format0，则在format1A后附加0，直至其与format0比特数相同。如果format 1A的信息bit数为表3中任一数，则在format 1A后附加一个0bit。当 format 1A CRC与RA-RNTI，P-RNTI，或SI-RNTI加扰时，保留以下几个域：- HARQ进程数- Downlink 分配索引 (仅用于TDD)1.4 格式1B表5 格式1B的内容格式1B：用于带有p

10、recoding信息的一个码字的PDSCH的紧凑调度内容长度Localized/Distributed VRB assignment flag1bitResource block assignmentLocal VRBresource allocation bitsDistributed VRBresource allocation bitsIndicates ( value 0) or ( value 1)1 bitresource allocation bitsModulation and coding scheme5 bitsHARQ process number3 bits(FDD),

11、4 bits(TDD)New data indicator1 bitRedundancy version2 bitsTPC command for PUCCH2 bitsDL Assignment Index（TDD模式所有配置，应用于上下行配置16）2 bits（FDD不存在）TPMI information for precodingbits数见表6PMI confirmation for precoding1 bit,见表7TPMI 信息指示使用36.211的表6.3.4.2.3-1或6.3.4.2.3-2表中对应单层传输的哪个码书。表 6 Number of bits for TPMI

12、 informationNumber of antenna ports at eNode-BNumber of bits2244表7 Content of PMI confirmationBit field mapped to indexMessage0Precoding according to the indicated TPMI in the TPMI information field1Precoding according to the latest PMI report on PUSCH using the precoder(s) indicated by the reported

13、 PMI(s)如果format 1B的信息bit数为表3中任一数，则在format 1B后附加一个0bit。1.5 格式1C若DCI 1C用于非常紧凑的DL-SCH传输表8 格式1C的内容格式1C：用于非常紧凑的DL-SCH传输内容长度gap value, no bit for gap indication1bit0:1:Resource block assignment bitsTransport block size index5 bitsand are defined in 36.211 and is defined in 36.213.若DCI 1C用于通知UE MCCH变更Infor

14、mation for MCCH change notification 8bitReserved information bits 使得用于通知UE MCCH变更的DCI 1C与用于非常紧凑的DL-SCH传输的DCI 1C等长。1.6 格式1D表9 格式1D的内容格式1D：用于带有precoding和功率偏移信息的一个码字的PDSCH的紧凑调度内容长度Localized/Distributed VRB assignment flag1bitResource block assignmentLocal VRBresource allocation bitsDistributed VRBresou

15、rce allocation bitsIndicates ( value 0) or ( value 1)1 bitresource allocation bitsModulation and coding scheme5 bitsHARQ process number3 bits(FDD),4 bits(TDD)New data indicator1 bitRedundancy version2 bitsTPC command for PUCCH2 bitsDL Assignment Index（TDD模式所有配置，应用于上下行配置16）2 bits（FDD不存在）TPMI informat

16、ion for precodingbits数见表10Downlink power offset1 bitTPMI 信息指示使用36.211的表6.3.4.2.3-1或6.3.4.2.3-2表中对应单层传输的哪个码书。表10 Number of bits for TPMI informationNumber of antenna ports at eNode-BNumbe of bits2244如果format 1D的信息bit数为表3中任一数，则在format 1D后附加一个0bit。1.7 格式2表11 格式2的内容内容长度Resource allocation header(resourc

17、e allocation type0/type1)1 bit0指示为type0；1指示为type1如果下行带宽小于或等于10PRBs，没有资源分配头域，资源分配方式默认为type0。Resource block assignmenttype0provide the resource allocationbitstype1indicate the selected resource blocks subset bitsindicates a shift of the resource allcotion span1 bitprovide the resource allocationbitsTP

18、C command for PUCCH2 bitsDL Assignment Index（TDD模式所有配置，应用于上下行配置16）2 bits (FDD不存在)HARQ process number3 bits(FDD),4 bits(TDD)Transport block to codeword swap flag1 bitFor the first transport blockModulation and coding scheme5 bitsNew data indicator1 bitRedundancy version2 bitsFor the second transport

19、blockModulation and coding scheme5 bitsNew data indicator1 bitRedundancy version2 bitsPrecoding information见表15和表16如果两个传输块都可用，传输块到码字的映射由表12规定。在只有一个传输块可用的情况如36.213第7.1.7.2节所述，传输块到码字的swap flag预留，传输块到码字的映射由表13规定。表12 Transport block to codeword mapping(two transport blocks enabled)transport block to cod

20、ewordswap flag valuecodeword 1(enabled)codeword 2(enabled)0transport block 1transport block 21transport block 2transport block 1表13 Transport block to codeword mapping(one transport block enabled)transport block 1transport block 2codeword 1(enabled)codeword 2(disabled)enableddisabledtransport block

21、1-disabledenabledtransport block 2-Precoding信息域的表示依赖于对应表15和表16的可用码字数。 TPMI 指示使用 Table 6.3.4.2.3-1 or Table 6.3.4.2.3-2 of 36.211中哪个码书。对于单码字，如果先前的传输块在闭环空分复用模式下通过两层传输，则表16中的索引号18到34只支持对应HARQ处理重传。如果format 2的信息bit数为表3中任一数，则在format 2后附加一个0bit。 表15和表16中某些内容用于指示eNode-B采用了对应UE上报的PMI的precoding。在这种情况下，子帧n.相应R

22、B(s)的precoding权对应UE在PUSCH中最后反馈的PMI(s) ，而不是n-4子帧或其前面子帧的PUCCH反馈值。表14 Number of bits for precoding informationNumber of antenna ports at eNode-BNumber of bits for precoding information2346表15: Content of precoding information field for 2 antenna portsOne codeword:Codeword 1 enabled,Codeword 2 disabledT

23、wo codewords:Codeword 1 enabled,Codeword 2 enabledBit field mapped to indexMessageBit field mapped to indexMessage02 layers: Transmit diversity02 layers: Precoding corresponding to precoder matrix 11 layer: Precoding corresponding to precoding vector 12 layers: Precoding corresponding to precoder ma

24、trix 21 layer: Precoding corresponding to precoder vector 22 layers: Precoding according to the latest PMI report on PUSCH, using the precoder(s) indicated by the reported PMI(s)31 layer: Precoding corresponding to precoder vector 3reserved41 layer: Precoding corresponding to precoder vector 4reserv

25、ed51 layer:Precoding according to the latest PMI report on PUSCH, using the precoder(s) indicated by the reported PMI(s),if RI=2 was reported, using 1st column multiplied by of all precoders implied by the reported PMI(s)5reserved61 layer:Precoding according to the latest PMI report on PUSCH, using

26、the precoder(s) indicated by the reported PMI(s),if RI=2 was reported, using 2nd column multiplied by of all precoders implied by the reported PMI(s)6reserved7reserved7reserved表 16 Content of precoding information field for 4 antenna portsOne codeword: Codeword 1 enabled, Codeword 2 disabledTwo code

27、words: Codeword 1 enabled, Codeword 2 enabledBit field mapped to indexMessageBit field mapped to indexMessage04 layers: Transmit diversity02 layers: TPMI=011 layer: TPMI=012 layers: TPMI=121 layer: TPMI=1152 layers: TPMI=15161 layer: TPMI=15162 layers: Precoding according to the latest PMI report on

28、 PUSCH using the precoder(s) indicated by the reported PMI(s)171 layer: Precoding according to the latest PMI report on PUSCH using the precoder(s) indicated by the reported PMI(s)173 layers: TPMI=0182 layers: TPMI=0183 layers: TPMI=1192 layers: TPMI=1323 layers: TPMI=15332 layers: TPMI=1533 3 layer

29、s: Precoding according to the latest PMI report on PUSCH using the precoder(s) indicated by the reported PMI(s)342 layers: Precoding according to the latest PMI report on PUSCH using the precoder(s) indicated by the reported PMI(s)344 layers: TPMI=035 63reserved354 layers: TPMI=1494 layers: TPMI=155

30、04 layers: Precoding according to the latest PMI report on PUSCH using the precoder(s) indicated by the reported PMI(s)51 63Reserved1.8 格式2A表17 格式2A的内容内容长度Resource allocation header(resource allocation type0/type1)1 bit0指示为type0；1指示为type1如果下行带宽小于或等于10PRBs，没有资源分配头域，资源分配方式默认为type0。Resource block assig

31、nmenttype0provide the resource allocationbitstype1indicate the selected resource blocks subset bitsindicates a shift of the resource allcotion span1 bitprovide the resource allocationbitsTPC command for PUCCH2 bitsDL Assignment Index（TDD模式所有配置，应用于上下行配置16）2 bits(FDD不存在)HARQ process number3 bits(FDD),

32、4 bits(TDD)Transport block to codeword swap flag1 bitFor the first transport blockModulation and coding scheme5 bitsNew data indicator1 bitRedundancy version2 bitsFor the second transport blockModulation and coding scheme5 bitsNew data indicator1 bitRedundancy version2 bitsPrecoding information见表18若

33、两个传输块均可用，传输块到码字的映射规定如表12。在一个传输块不可用时，传输块到码字的swap flag域预留，传输块到码字的映射规定如表13。precoding 信息域定义见表19。对于单码字，如果先前的传输块在开环空分复用模式下通过两层传输，则表19中的索引号1只支持对应HARQ处理重传。两天线端口的传输没有precoding信息域。如果两个码字都可用，传输层RI等于2；如果码字2不可用，则使用发射分集。表18 Number of bits for precoding informationNumber of antenna ports at eNode-BNumber of bits f

34、or precoding information2042表 19 Content of precoding information field for 4 antenna portsOne codeword:Codeword 1 enabled,Codeword 2 disabledTwo codewords:Codeword 1 enabled,Codeword 2 enabledBit field mapped to indexMessageBit field mapped to indexMessage04 layers: Transmit diversity02 layers: pre

35、coder cycling with large delay CDD12 layers: precoder cycling with large delay CDD13 layers: precoder cycling with large delay CDD2reserved24 layers: precoder cycling with large delay CDD3reserved3reserved如果format 2A的信息bit数为表3中任一数，则在format 2A后附加一个0bit。1.9 格式2B 表20 格式2B的内容内容长度Resource allocation head

36、er(resource allocation type0/type1)1 bit0指示为type0；1指示为type1如果下行带宽小于或等于10PRBs，没有资源分配头域，资源分配方式默认为type0。Resource block assignmenttype0provide the resource allocationbitstype1indicate the selected resource blocks subset bitsindicates a shift of the resource allcotion span1 bitprovide the resource alloca

37、tionbitsTPC command for PUCCH2 bitsDL Assignment Index（TDD模式所有配置，应用于上下行配置16）2 bits(FDD不存在)HARQ process number3 bits(FDD),4 bits(TDD)Scrambling identity1 bitFor the first transport blockModulation and coding scheme5 bitsNew data indicator1 bitRedundancy version2 bitsFor the second transport blockModu

38、lation and coding scheme5 bitsNew data indicator1 bitRedundancy version2 bits如果两个传输块均使能，则传输层数等于2，传输块1映射到码流0上，传输块2映射到码流1上，天线端口7和8使用空间复用。如果一个传输块不使能，则传输层数等于1，传输块到码流的映射关系由表13得到，使用哪个天线端口传输数据由下表得到。表21 Antenna port for single-antenna port transmission (one transport block disabled)New data indicator of the

39、 disabled transport blockAntenna port 0718如果format 2B的信息bit数为表3中任一数，则在format 2B后附加一个0bit。1.10 格式3表22 格式3的内容格式3：用于传输2bit功率调整的PUCCH和PUSCH的TPC命令内容长度TPC command for user 1, user 2, user N2 bit其中，,， 是format 0 在附加CRC校验码之前的有效载荷大小，包括附加在format0之后的比特。高层提供参数tpc-Index确定给定UE的TCP命令的索引。如果，就在format3后附加一个0bit。1.11 格

40、式3A表23 格式3A的内容格式3A：用于传输1bit功率调整的PUCCH和PUSCH的TPC命令内容长度TPC command for user 1, user 2, user M1 bit其中， 是format 0 在附加CRC校验码之前的有效载荷大小，包括附加在format0之后的比特。高层提供参数tpc-Index确定给定UE的TCP命令的索引。1.12 各DCI消息的长度表24 一个PDCCH的有效载荷（TDD）PDCCH 格式有效载荷0Length(DCI 0) >= Lenth(DCI 1A)+16 bitsLength(DCI 0) < Lenth(DCI 1A)L

41、enth(DCI 1A)1+17 bits+16 bitsLength(DCI 1) = Lenth(DCI 0/1A)长度加1Length(DCI 1) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加11ALength(DCI 1A) >= Lenth(DCI 0)+18 bitsLength(DCI 1A) < Lenth(DCI 0)Lenth(DCI 0)Length(DCI 1A) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加11B2端口+20 bits4端口+22 bitsLength(D

42、CI 1B) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加11C+5 bitselse+6 bits1D2端口+20 bits4端口+22 bitsLength(DCI 1D) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加12，2端口+29 bits，4端口+32 bits，2端口+28 bits，4端口+31 bitsLength(DCI 2) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加12A，2端口+26 bits，4端口+28 bits，2端口+25 bits，

43、4端口+27 bitsLength(DCI 2A) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加12B+26 bits+25 bitsLength(DCI 2B) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加13Lenth(DCI 0)3ALenth(DCI 0)表25 一个PDCCH的有效载荷（FDD）PDCCH 格式有效载荷0Length(DCI 0) >= Lenth(DCI 1A)+14 bitsLength(DCI 0) < Lenth(DCI 1A)Lenth(DCI 1A)1+14 b

44、its+13 bitsLength(DCI 1) = Lenth(DCI 0/1A)长度加1Length(DCI 1) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加1或者更多直至Length(DCI 1)不属于上述集合1ALength(DCI 1A) >= Lenth(DCI 0)+15 bitsLength(DCI 1A) < Lenth(DCI 0)Lenth(DCI 0)Length(DCI 1A) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加11B2端口+17 bits4端口+19 bits

45、Length(DCI 1B) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加11C+5 bitselse+6 bits1D2端口+17 bits4端口+19 bitsLength(DCI 1D) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加12，2端口+26 bits，4端口+29 bits，2端口+25 bits，4端口+28 bitsLength(DCI 2) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加12A，2端口+23 bits，4端口+25 bits，2端口+

46、22 bits，4端口+24 bitsLength(DCI 2A) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加12B+23 bits+22 bitsLength(DCI 2B) = 12, 14, 16 ,20, 24, 26, 32, 40, 44, 56长度加13Lenth(DCI 0)3ALenth(DCI 0)1.13 各DCI的应用表26 PDCCH and PDSCH configured by SI-RNTIDCI formatSearch SpaceTransmission scheme of PDSCH corresponding

47、to PDCCHDCI format 1CCommonIf the number of PBCH antenna ports is one, Single-antenna port, port 0 is used, otherwise Transmit diversity.DCI format 1ACommonIf the number of PBCH antenna ports is one, Single-antenna port, port 0 is used, otherwise Transmit diversity表27 PDCCH and PDSCH configured by P

48、-RNTIDCI formatSearch SpaceTransmission scheme of PDSCH corresponding to PDCCHDCI format 1CCommonIf the number of PBCH antenna ports is one, Single-antenna port, port 0 is used (see subclause 7.1.1), otherwise Transmit diversity (see subclause 7.1.2)DCI format 1ACommonIf the number of PBCH antenna p

49、orts is one, Single-antenna port, port 0 is used (see subclause 7.1.1), otherwise Transmit diversity (see subclause 7.1.2)表28 PDCCH and PDSCH configured by RA-RNTIDCI formatSearch SpaceTransmission scheme of PDSCH corresponding to PDCCHDCI format 1CCommonIf the number of PBCH antenna ports is one, S

50、ingle-antenna port, port 0 is used (see subclause 7.1.1), otherwise Transmit diversity (see subclause 7.1.2)DCI format 1ACommonIf the number of PBCH antenna ports is one, Single-antenna port, port 0 is used (see subclause 7.1.1), otherwise Transmit diversity (see subclause 7.1.2)表29 PDCCH and PDSCH

51、configured by C-RNTITransmission modeDCI formatSearch SpaceTransmission scheme of PDSCH corresponding to PDCCHMode 1DCI format 1ACommon andUE specific by C-RNTISingle-antenna port, port 0 (see subclause 7.1.1)DCI format 1UE specific by C-RNTISingle-antenna port, port 0 (see subclause 7.1.1)Mode 2DCI

52、 format 1ACommon andUE specific by C-RNTITransmit diversity (see subclause 7.1.2)DCI format 1UE specific by C-RNTITransmit diversity (see subclause 7.1.2)Mode 3DCI format 1ACommon andUE specific by C-RNTITransmit diversity (see subclause 7.1.2)DCI format 2AUE specific by C-RNTILarge delay CDD (see s

53、ubclause 7.1.3) or Transmit diversity (see subclause 7.1.2)Mode 4DCI format 1ACommon andUE specific by C-RNTITransmit diversity (see subclause 7.1.2)DCI format 2UE specific by C-RNTIClosed-loop spatial multiplexing (see subclause 7.1.4)or Transmit diversity (see subclause 7.1.2)Mode 5DCI format 1ACommon andUE specific by C-RNTITransmit diversity (see subclause 7.1.2)DCI format 1DUE specific by C-RNTIMulti-user MIMO (see subclause 7.1.5)Mode 6DCI format 1ACommon andUE specific by C-RNTITransmit diversity (see subclause 7.1.2)DCI format 1BUE specific by C-RNTIClosed-loop spatial multiplexing