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[讨论]PUCCH procedure的理解
提问者:tiffanyli   |  提问时间:2010-8-17 19:07
最近在看PUCCH procedure,有很多问题不理解,想请教下: 1. PUCCH格式1b,在ACK/NACK bundling下,是用于双码字的传输,PUCCH1a,则是用于单码字的传输,这样理解对吗? 2. 在ACK/NACK multiplexing下,由于是一种空间的bundling,这个时候的PUCCH格式1b,则既可以是双码字,也可以是单码字传输,对吗?如果一个PUCCH对应的是2个下行传输,则用PUCCH格式1a,如果大于2个小于4个,则用PUCCH格式1b。这也是为什么DL-UL配置5只能用于bundling而不能multiplexing的原因? 3.the number of the first CCE used for transmission of the corresponding PDCCH in subframe n-km,是不是因为PDCCH的复用,不同PDCCH对应于不同的传输,而这里需要找出对应与本次PDSCH传输对应的PDCCH CCE的号码? 4. 我上次讲的图就是TS36.213的10.1-2~10.1-4,这几个图分别是transmission of ACK/NACK multiplexing for M=2,M-3,M=4。这些图是不是主要就是为了根据n1_PUCCH_i的i值,以及Np,n_CCE等参数计算n1_PUCCH?HARQ-ACK(0)/HARQ(1)则就是PUCCH格式对应的内容? 5. n1_PUCCH协议中说是指示用于PUCCH格式1/1a/1b的传输资源,这里的传输资源如何理解?表示传输资源块的数目? 6. Channel selection 如何理解?
Qestion 3, it just indicates that PUCCH resource for HARQ-ACK to dynamis scheduling isimplicitly determined by the first CCE number.
The logical behind is that, n1-PUCCH signalled by RRC indicates the PUCCH resources reserved for SR or semi-presistent scheduling, and the rest PUCCH resouces can be used for HARQ-ACK to dynamic scheduling, that maximum number of the PUCCH resources for this purpose is the maximum CCE number.
In total, the frequency layout for PUCCH shall like the following:
1.region for PUCCH 2/2a/2b (indicated by n2-pucch)
2.region for mixed PUCCH 1/1a/1b and PUCCH 2/2a/2b (indicated by n1-cs)
3.region for PUCCH positive SR (indicated by n1-pucch)
4.region for PUCCH HARQ-ACK or HARQ-ACK together with negtive SR
回答时间:2012-6-13 21:31
 
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