翻了下协议，
Regardless of whether the UE is monitoring PDCCH or not the UE receives and transmits HARQ feedback when such is expected.
字面意思理解，DRX只是允许UE不连续侦听PDCCH，但不影响HARQ-ACK的收发。
上行重传分为自适应和非自适应两种，如果是下发UL Grant或NACK+UL Grant，那么是自适应重传，如果只下发NACK，则为非自适应重传。
对于DRX来说，是不是UE sleep时，只下发NACK触发非自适应重传；而在UE active时，下发UL Grant或者NACK+UL Grant触发自适应重传？
这个在协议文本里也有体现：
36.213
For FDD and normal HARQ operation, the UE shall upon detection of a PDCCH with DCI format 0 and/or a PHICH transmission in subframe n intended for the UE, adjust the corresponding PUSCH transmission in subframe n+4 according to the PDCCH and PHICH information. 注意其中的and/or
36.321
For each TTI, the HARQ entity shall:
- identify the HARQ process associated with this TTI;
- if an uplink grant has been indicated for this TTI:
[。。。省略]//有UL Grant且指示初传
- else://有UL Grant且指示重传
- deliver the uplink grant and the HARQ information (redundancy version) to the identified HARQ process;
- instruct the identified HARQ process to generate an adaptive retransmission.
- else, if the HARQ buffer of the HARQ process corresponding to this TTI is not empty: //没有UL Grant
- instruct the identified HARQ process to generate a non-adaptive retransmission.
[ 本帖最后由 jeffyko 于 2011-8-3 11:22 编辑 ]
时间: 2011-8-3 11:33
作者: erbozi
我的意思是，如果eNB发出的NACK+UL grant的这个TTI UE是sleep状态，它必须要wake up到active状态，如果发的是ACK，则仍可以维持sleep。UE是不是先判断PHICH中的ACK or NACK，然后再决定是否wake up？