top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

Why RRC Re-establishment doesn't occur at S1 Handover failure ?

+5 votes
575 views
Why RRC Re-establishment doesn't occur at S1 Handover failure ?
posted Nov 10, 2014 by anonymous

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

1 Answer

+1 vote

RRC Connection reestablishement can occurs during any type of HO(X2/S1). It is not depend upon the type of HO. After getting rrcconnection reconfiguration with mobility parameters, UE starts t304 timer and try to perform RACH with the target cell. If t304 expires at UE before getting successful RACH resolved at target cell then UE performs rrc connection reestablishment with source cell parameters(PCI,C-RNTI,shortMAC-I) and reestablishmentCause as handoverfailure.

answer Nov 10, 2014 by Veer Pal Singh Yadav
Similar Questions
+2 votes
Why Security Should be needed to Initiate RRC Connection Re-establishment?

Upon detecting Radio Link Failure UE will do RRC Connection re-establishment but to do RRC Connection re-establishment security should be activated in UE, otherwise UE will go Idle mode.So here(After detecting RLF) we are resetting all PHY,MAC,RLC,PDCP Configurations but why we are making security should be there to do RRC Connection re-establishment.

0 votes
Why Security Should be Activated to Initiate RRC Connection Re-establishment?

Upon detecting Radio Link Failure UE will do RRC Connection re-establishment but to do RRC Connection re-establishment security should be activated in UE, otherwise UE will go Idle mode.So here(After detecting RLF) we are resetting all PHY,MAC,RLC,PDCP Configurations but why we are making security should be there to do RRC Connection re-establishment.

+3 votes
How to inform MME about UE movement from eNB1 to eNB2 after UE sending Re-establishment-HO failure to eNB2 during HO?

How to inform MME about UE movement from Source eNB to Target eNB after UE sending Re-establishment with HO failure to target eNB during handover. In this case HO notify or path switch is applicable ?

...