3GPP在TS36.212 5.3.3.1中定义了DCI的Format及结构;由于版本和Format不同其具体内容有一定差异,但基本结构和内容均基于R8的结构和内容;其中:DCI format0(R8)内容如下:
format 0 (Release 8) - C-RNTI, SPS C-RNTI |
Field Name(字段名称) | Length(长度) | Comment(内容) |
Flag for format0/format1A differentiation(format0与format0区分标识) | 1 |
|
Hopping flag(跳频标识) | 1 |
|
N_ULhop(上行跳频) | 1 (1.4 Mhz) 1 (3 Mhz) 1 (5 Mhz) 2 (10 Mhz) 2 (15 Mhz) 2 (20 Mhz) | Applicable only when Hopping flag is set.(Refer to 36.213 Table 8.4-1 and Table 8.4-2)is.(如果标识跳频,查表36.213 Table 8.4-1 and Table 8.4-2) |
Resource block assignment(资源指配) | 5 (1.4 Mhz) 7 (3 Mhz) 7 (5 Mhz) 11 (10 Mhz) 12 (15 Mhz) 13 (20 Mhz) | See 36.213 8.1(查表36.213 8.1) |
MCS and RV(MSC和RV指示) | 5 |
|
NDI (New Data Indicator)(新数据标识) | 1 |
|
TPC for PUSCH(PUSCH功率控制) | 2 | See Power Control section |
Cyclic shift for DM RS(DM RS循环前缀) | 3 | See 36.211 Table 5.5.2.1.1-1(查表5.5.2.1.1-1) |
UL index (TDD only)(上行指示--仅TDD) | 2 | This field is present only for TDD operation with uplink-downlink configuration 0 |
Downlink Assignment Index (DAI)(下行指示) | 2 | set only in TDD Operation with uplink-downlink configurations 1-6 |
CSI request (1 or 2 bit)(CSI请求) | 1 or 2 | This field is used to trigger Aperiodic CSI report from UE based on 36.213 7.2.1. In case of Aperiodic Report in Carrier Aggregation, Refer to this page. |
附1.36.213 Table 8.4-1: Number of Hopping Bits NUL_hop vs. System Bandwidth
附2.36.213 Table 8.4-2: PDCCH DCI Format 0 Hopping Bit Definition
附3.36.213 8.1 Resource Allocation for PDCCH DCI Format 0
附4.36.211 Table 5.5.2.1.1-1: Mapping of Cyclic Shift Field in DCI format 0 to DMRS(2)_n Values
附5.36.213 Table 7.3-X: Value of Downlink Assignment Index
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整理:kangguoying20201216
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