top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

What is the use of rrc transaction identifier in rrc messages ?

+1 vote
8,368 views
What is the use of rrc transaction identifier in rrc messages ?
posted Apr 16, 2015 by Vikram Singh

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button
Each RRC procedure is identified by an identifier i.e. rrc transaction identifier. When an eNodeB sends a rrc message  as an initial message or response to a rrc message received earlier, it adds a transaction identifier i.e. known as rrc transaction identifier.  When a response receives from UE, it uses rrc transaction identifier to identify rrc procedure.

1 Answer

0 votes

The RRC Transaction Identifier (0-3) combined with the "message type" identifies the RRC procedure with the UE , The RRC transaction identifier alone cannot identify the procedure.

The following rules provide guidance on which messages should include a Transaction identifier
1: DL messages on CCCH that move UE to RRC-Idle should not include the RRC transaction identifier.
2: All network initiated DL messages by default should include the RRC transaction identifier.
3: All UL messages that are direct response to a DL message with an RRC Transaction identifier should include the RRC Transaction identifier.
4: All UL messages that require a direct DL response message should include an RRC transaction identifier.
5: All UL messages that are not in response to a DL message nor require a corresponding response from the network should not include the RRC Transaction identifier.

answer Apr 17, 2015 by Saurabh Srivastava
Similar Questions
+2 votes

It may be an easy question but still I have some doubt.
How RRC Connection setup procedure gets impacted with the presence of "S-TMSI" as an UE-Identity within the RRC Connection Request message ?
Note: RRC Connection request message can carry either 5 bytes long (S-TMSI) or 5 bytes long random value.

...