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LTE handover: Why does "TAC" required as part of "Target Id" IE within the forward relocation request message ?

+2 votes
1,233 views

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 ?

posted Apr 21, 2014 by Vimal Kumar Mishra

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1 Answer

+4 votes

You are right,k you can flawlessly identify the eNB just by the above, but I would say TAC is passed to know which SGW is serving this UE.

MME will resolve the SGW based on the DNS

answer Apr 23, 2014 by Bart Barton
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