BASE STATION AND METHOD IN RELAY NODE MOBILITY

摘要

The present disclosure relates to a base station and a method for security key synchronization during relay node (RN) mobility. In one embodiment, the base station may include a first transceiver configured to receive a Next Hop Chaining Counter in use, NCCuse—use, sent from a source base station; a security key synchronization determining unit configured to determine that a security key synchronization criteria as follows is met: NCClatest−NCCuse—use>Threshold, wherein NCClatest denotes a Next Hop Chaining Counter corresponding to the last Next Hop (NH) received from evolved packet core (EPC) for the user equipment (UE), and Threshold is a predetermined threshold; a second transceiver configured to send a security key update request to a relay node serving the UE, and to receive a security key update response from the relay node serving the UE; and a security key updater configured to update the NCCuse—use as the NCClatest.

主权项

1. A base station, comprising:
a first transceiver configured to receive a Next Hop Chaining Counter in use, NCCuse—use, sent from a source base station; a security key synchronization determining unit configured to determine that a security key synchronization criteria as follows is met:
NCClatest−NCCin use>Threshold, wherein NCClatest denotes a Next Hop Chaining Counter corresponding to a last Next Hop (NH) received from an evolved packet core (EPC) for a User Equipment (UE), and Threshold is a predetermined threshold; a second transceiver configured to send a security key update request to a relay node serving the UE, and to receive a security key update response from the relay node serving the UE; and a security key updater configured to update the NCCuse—use as the NCClatest.