top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration

Facebook Login
Site Registration

Why RRC integrity function is in PDCP?

+1 vote

After reading security protocol of LTE, I am wondering both AS integrity and ciphering are in PDCP by using PDCP SN.

But in WCDMA, RRC integrity is RRC layer, and RRC ciphering are in RLC as user plane data..
1) Why design as this in LTE?
2) LTE RRC seems have no RRC sequence number?

posted Jun 16, 2014 by anonymous

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

2 Answers

+1 vote
  1. In LTE security(integrity and ciphering) is bring into PDCP only. So no need to have same feature scattered in RRC/RLC.

  2. In LTE the PDCP sequence number is used for the security algorithm and not RRC sequence number.

answer Jun 17, 2014 by Sanjeet Kumar
+1 vote

Want to clarify a bit. There is not RRC-integrity and RRC-ciphering. Integrity and Ciphering are two processes.

Integrity refers to maintaining and assuring the accuracy and consistency of data over its entire life-cycle.
Ciphering: put a message into secret writing (put (encode).

Now coming to your question why it is like this: In layman It is just shifted the work from one protocol to other protocol. Dividend rule :). The main purpose is to get the work done. Who is doing that's not compulsion. PDCP layer has to be there to do the ROHC so It can have more work. No need to make the lengthy code for RRC. That's what I think. Rest they might have some technical aspects also. Might other will emphasize on it.

answer Jun 17, 2014 by Hiteshwar Thakur
Similar Questions
+1 vote

why Ciphering is done for both user plane and control plane data, why not integrity done for both data in PDCP protocol

+2 votes

What are the steps involved to do integrity verification ?

+8 votes

I have basic understanding of RRC Re-establishment procedure at RRC level. But i am looking for actions performed by lower layer like PDCP, RLC etc wrt DATA Plane and signalling.

Contact Us
+91 9880187415
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Karnataka INDIA.