When eNB will send RRC Connection reestablishment reject message?

Question

Which message EnodeB will communicate to MME after Receiving the Reestablishment Complete message from UE. what else messages will transverse between EnodeB and MME, before sending Reconfiguration message to UE from EnodeB after Reestablishment complete message has been received at EnodeB.

Answer 1

Please find my inputs over this query as following:

ReestabUE-Identity ::=              SEQUENCE {
    c-RNTI                              C-RNTI,
    physCellId                          PhysCellId,
    shortMAC-I                          ShortMAC-I
}

ReestabUE-Identity IE is sent by the UE in RRCConnectionReestablishmentRequest message. If one of the parameters present in this information element is incorrect or in other words, eNodeB fails to find UE context or security check gets failed . In that scenario, eNodeB responds back to UE with the RRCConnectionReestablishmentReject message.

Waiting for others to respond.