top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

How PDCP differentiate between NAS message and RRC message?

0 votes
499 views

How PDCP differentiate between NAS message and RRC message

Case 1: if its on same bearer
Case 2: If it is on different bearer.

posted Jun 3, 2014 by anonymous

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

+1 vote

I think it does not.

And it does not need to do it as all signalling messages will anyways for to RRC. PDCP only differentiates between signalling and data based on the Radio bearer type.

In NAS , the distinction between EMM and ESM is done based on the protocol discriminator field in the beginning of the PDU.

answer Jun 3, 2014 by Shyam Purkayastha
Similar Questions
+4 votes
LTE: When UE sends NAS message to MME before sending rrc connection reconfiguration complete to the eNodeB ?

There are couple of procedures are defined which consist of NAS as well as RRC signalling messages exchange.
Some of the NAS message sends to an UE through RRC Connection Reconfiguration message as piggybacked and some as DL Info transfer.

I want to know, Is there any procedure exists in lte when an UE receives RRC Connection Reconfiguration along with NAS message and responds back to network with NAS message first and then Reconfiguration Complete to eNodeB.

Usually, I saw UE sends RRC Connection Reconfiguration Complete message first then NAS response message.

+3 votes
what the sequence of message exchanged between UE <-enode-> and the stack layer pdcp <->rlc<->mac for the data flow.

I am interested to know the entire data flow from EnodeB to UE across all the RA stack layers

+1 vote
LTE : I came to know that integrity and ciphering order for RRC and NAS level are reverse to each other ?

I am bit confused why the different order are used for integrity and ciphering of RRC and NAS message ?
What if the same order (ciphering and then integrity) is used for RRC message ?

...