Method for authenticating access layer on basis of public key infrastructure in consideration of handover in next-generation wireless communication system

A serving base station (BS) supporting mutual authentication of an access stratum (AS) section in case that handover is performed in a wireless communication system, the BS comprising:

• a transceiver;
• and
• a controller connected to the transceiver and configured to control the transceiver and perform control to:
• receive a measurement report from a user equipment (UE),
• identify whether the UE satisfies the handover condition, based on the measurement report, in case that the UE satisfies the handover condition,
• identify whether a target BS connected for handover of the UE belongs to a same authentication area (AA) as that of the serving BS, and
• transmit a handover command varying depending on whether the target BS and the serving BS belong to the same AA to the UE.

A user equipment (UE) for mutual authentication of an access stratum (AS) section in case that handover is performed in a wireless communication system, the UE comprising:

• a transceiver;
• and
• a controller connected to the transceiver and configured to control the transceiver and perform control to:
• receive, from the serving BS, a handover command varying depending on whether a target base station (BS) connected for handover of the UE belongs to a same authentication area (AA) as that of a serving BS, and
• determine whether to perform public key infrastructure (PKI)-based mutual authentication with the target BS, based on information included in the handover command.