top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

Can vertical key derivation happen in X2 based handover in LTE

+1 vote
868 views

Please can any one say when vertical key derivation can happen

posted Jun 12, 2014 by anonymous

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button
Might the same questions been asked before. Please have a look in to Link:
http://tech.queryhome.com/5170/what-the-use-ncc-and-regarding-security-keys-derivation-lte

Anonymous question has poor attention, better to register here and ask as a user. Thums Up.
commented Jun 12, 2014 by Hiteshwar Thakur

1 Answer

0 votes

In X2 based handover KeNB* is calculated from either from unused NH or KeNB. So if eNB has recieved NH values from the MME and if not used yet can go for vertical derivation.

answer Jun 13, 2014 by Sanjeet Kumar
Similar Questions
+1 vote
Would there be an advantage of X2 based handover over S1 based handover, when X2 physically spans the same path as S1?

In case of hub-and-spoke topology, X2 messaging can travel all the way back to an aggregation point, which may be co-located with EPC. In such scenario both X2 and S1 traverses same physical path (a.k.a X2 over S1). Please consider both Intra-MME and Inter-MME handover scenarios. Would X2 based handover in such a case yield advantage over S1 based handover. Thanks.

+4 votes
How target enodeb will validate the new incoming user during x2 or s1 handover?

How target enodeb will confirm if the incoming user is a genuine user or not?

Is there any IE exchanged during HO preparation phase? I am expecting that during X2 handover AS SECURITY INFO in UE context is very helpful? Is that or not?

+5 votes
LTE S1-AP handover : How does a source mme find out the target mme as part of MME relocation based handover ?

As part of S1-AP procedure with MME relocation, Handover Required message sent to source MME. Target eNodeBId is present within the handover required. How source MME figure out target cell is being served by XYZ MME and sends "Forward relocation Request" message to XYZ MME.

Please provide reference also if it is there ?

...