top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

LTE: Why TAI is included into Handover Required message ?

+4 votes

What is the use of TAI , which is included in handover required message ?

posted Dec 8, 2013 by Neeraj Mishra

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

2 Answers

+6 votes
Best answer

TAI is not being used to locate a particular eNodeB(target eNodeB). TAI sends inside Handover required message, is used by source MME. It might be possible that target enodeB is not served by source MME but still belongs to tracking area which is served by source MME. In that case, S10 interface based handover comes into picture. Please refer 29.274 specification. Even this TAI helps to find suitable target SGW.

answer Dec 9, 2013 by Vimal Kumar Mishra
0 votes

So that we can identify particular EnodeB.

answer Dec 9, 2013 by sivanraj
Similar Questions
+2 votes

I have basic handover related query. How source eNodeB get to know when it has to trigger handover required message ? I mean to ask, how a source eNodeB come to know the threshold values of RSRP or RSRQ or both (related to target eNodeB) , required to do a successful handover towards eNodeB ? Is it due to network planning ?

+2 votes

In case of S1-handover with the MME relocation, source MME sends an information "Target Identification" to target MME.
What the target MME does by receiving TAC, when an enodeb can be identified uniquely by using combination of (PLMN + Macro/Home ENodeB) ?

Can someone tell me what the purpose behind to send TAC as part of Target Id IE ?

+2 votes

In the handover required message, there is an IE target TAI. How source eNodeB came to know TAI of target eNodeB ? Is it configurable parameter or UE report as part of handover or something else.

+2 votes

What is the reasoning behind to use different security keys after moving from one eNodeB to another eNodeB (Handover) ?