RRC Connection Reconfiguration

RRC Connection Reconfiguration

Dir:  E-UTRAN -> UE

SRB: SRB1

 

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这个消息用来修改RRC连接,主要目的:

1. To establish/modify/release Radio Bearers;

Ø 无线承载

2. To perform Handover;

Ø 切换

3. To setup/modify/release Measurements;

Ø 测量控制

4. To add/modify/release SCells;

Ø CA SCells

5. Dedicated NAS information might also be transferred from eNodeB to UE;

Ø Piggybacked (Many of NAS Message is piggybacked on RRC Messages)

 

RRC 连接重配置与3G的比较, in UMTS存在如下消息:

1. Transport Channel reconfiguration;

2. Physical Channel reconfiguration;

3. Radio Bearer Reconfiguration

4. Measurement control;

以上者4个消息在LTERRC Connection Reconfiguration 全部搞定;

UE 接收到RRC Connection Reconfiguration 消息后的处理:

Refer to 3GPP 36.331

 

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