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What are all actions taken by MME, when UE context Modification or E-RAB Modification procedure gets failed ?

+2 votes
posted Sep 4, 2014 by Vimal Kumar Mishra

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When target eNodeB is not able to allocate resource for all the bearers which comes as part of Handover Request message, it sends handover request ack with partial success since "E-RABs Failed to Setup List" is present in HOReqAck message.
What MME or source eNodeB does in that case ? Does any action taken by MME for the E-RABs which failed to setup at target eNodeB or some other actions taken ?

+1 vote

From MME to eNodeB, UE context modification procedure is triggered I know but what makes trigger of UE Context modification procedure from eNodeB to MME ?

+2 votes

when mme will change the security keys and send it in ue context modification request message