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标题: [5GNR]gNB向UE发送RRC Setup消息时用到PDCCH的Search Space是如何确定的？ [查看完整版帖子] [打印本页]

时间: 2019-3-23 15:41

作者: 天演 标题: [5GNR]gNB向UE发送RRC Setup消息时用到PDCCH的Search Space是如何确定的？

gNB向UE发送RRC Setup消息时用到PDCCH的Search Space是如何确定的。

我的理解是这个时候RNTI是C-RNCI，所以PDCCH的search space应该是UE specific的 search space。那这个search space是如何确定的呢？ SIB1中给定的吗？

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时间: 2019-3-25 07:36

作者: jeffyko

38.213 section 10里有描述。而且msg4用的是TC-RNTI；38.321 section 5.1.5：如果是cbra，contention resolution成功后将C-RNTI赋值为TC-RNTI。

2> else if the CCCH SDU was included in Msg3 andthe PDCCH transmission is addressed to its TEMPORARY_C-RNTI:

3> if the MAC PDU is successfully decoded:

4> stop ra-ContentionResolutionTimer;

4> if the MAC PDU contains a UE ContentionResolution Identity MAC CE; and

4> if the UE Contention Resolution Identity inthe MAC CE matches the CCCH SDU transmitted in Msg3:

5> consider this Contention Resolution successfuland finish the disassembly and demultiplexing of the MAC PDU;

5> if this Random Access procedure was initiatedfor SI request:

6> indicate the reception of an acknowledgementfor SI request to upper layers.

5> else:

6> set the C-RNTI to the value of the TEMPORARY_C-RNTI;

5> discard the TEMPORARY_C-RNTI;

5> consider this Random Access proceduresuccessfully completed.

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时间: 2020-12-25 14:44

作者: lizhiming183

学习了

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