CPC H04W 74/0833 (2013.01) [H04B 7/0695 (2013.01); H04L 5/0053 (2013.01); H04L 5/0094 (2013.01); H04W 74/002 (2013.01); H04W 76/18 (2018.02)] | 16 Claims |
1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a first message configuring a reconfiguration with synchronization, the first message including information related with a dual stack based handover;
identifying a failure of establishing a radio resource control (RRC) connection for the dual stack based handover;
generating first information including a synchronization signal block (SSB) index associated with a random access performed for the RRC connection, second information associated with an uplink carrier for the random access performed for the RRC connection, and third information indicating whether a contention was detected in the random access or not; and
transmitting, to a base station, a second message for reporting the failure of establishing the RRC connection, the second message including the first information, the second information, and the third information.
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