善于提问，勤于回答，你也是专家

请问TD-LTE是怎样判断PDCCH漏检的？

问题已开启普通问题提问者：aoshicanglong|提问时间：2012-07-13

我要回答

问题答案（1）

通过接收反馈，根据不同的反馈方式分别加以判断：

【1】bundling ：
TDD ACK/NACK bundling is performed per codeword across multiple DL subframes associated with a single UL subframe n, where is the number of elements in the set defined in Table 10.1-1, by a logical AND operation of all the individual PDSCH transmission (with and without corresponding PDCCH) ACK/NACKs and ACK in response to PDCCH indicating downlink SPS release. For one configured serving cell the bundled 1 or 2 ACK/NACK bits are transmitted using PUCCH format 1a or PUCCH format 1b, respectively.

【2】multiplexing ：
For TDD ACK/NACK multiplexing and a subframe n with , where is the number of elements in the set defined in Table 10.1-1, spatial ACK/NACK bundling across multiple codewords within a DL subframe is performed by a logical AND operation of all the corresponding individual ACK/NACKs. PUCCH format 1b with channel selection is used in case of one configured serving cell. For TDD ACK/NACK multiplexing and a subframe n with , spatial ACK/NACK bundling across multiple codewords within a DL subframe is not performed, 1 or 2 ACK/NACK bits are transmitted using PUCCH format 1a or PUCCH format 1b, respectively for one configured serving cell.

【3】
Table 10.1-1: Downlink association set index : for TDD

UL-DL Configuration	Subframe n
UL-DL Configuration	0	1	2	3	4	5	6	7	8	9
0	-	-	6	-	4	-	-	6	-	4
1	-	-	7, 6	4	-	-	-	7, 6	4	-
2	-	-	8, 7, 4, 6	-	-	-	-	8, 7, 4, 6	-	-
3	-	-	7, 6, 11	6, 5	5, 4	-	-	-	-	-
4	-	-	12, 8, 7, 11	6, 5, 4, 7	-	-	-	-	-	-
5	-	-	13, 12, 9, 8, 7, 5, 4, 11, 6	-	-	-	-	-	-	-
6	-	-	7	7	5	-	-	7	7	-