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|1. (WO2018202117) KEY UPDATING METHOD AND DEVICE|
|Applicants:||HUAWEI TECHNOLOGIES CO., LTD.
|Title:||KEY UPDATING METHOD AND DEVICE|
The present application provides a key updating method and device, the method comprising: acquiring by a user equipment (UE) first indication information, the first indication information comprising information about key update, and the key being used for communication between the UE and a secondary base station; and completing the key update or keeping the key unchanged by the UE according to the first indication information. The UE can be flexibly controlled by means of the first indication information to complete the key update or keep the key unchanged; in particular when the key is not required to be updated, the UE does not need to establish a PDCP layer, therefore, service will not be interrupted and service quality will be guaranteed.