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标题: NB-IOT MAC Rach 过程求解惑 [查看完整版帖子] [打印本页]

时间: 2017-6-30 10:06

作者: woshiwojia 标题: NB-IOT MAC Rach 过程求解惑

If no RandomAccess Response is received within the RA Response window, or if none of allreceived Random Access Responses contains a Random Access Preamble identifiercorresponding to the transmitted Random Access Preamble, the Random AccessResponse reception is considered not successful and the MAC entity shall:

- if the notification of power ramping suspension hasnot been received from lower layers:

- increment PREAMBLE_TRANSMISSION_COUNTER by 1;

- if the UE is an NB-IoT UE, a BL UEor a UE in enhanced coverage:

- ifPREAMBLE_TRANSMISSION_COUNTER = preambleTransMax-CE+ 1:

- if the Random Access Preamble is transmitted on the SpCell:

- indicate a Random Access problem to upper layers;

- if NB-IoT:

- consider the RandomAccess procedure unsuccessfully completed;

3gpp 36.321 chapter 5.1.4

疑问： power ramping suspension什么时候物理层会发给MAC ？

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