Key isolation method and device

摘要

According to an embodiment of the present invention, after a macro base station judges to switch a user plane bearer of user equipment, according to a differentiating parameter of a target base station and a temporary key shared by the macro base station and the user equipment, the macro base station generates a key used for the communication between the target base station and the user equipment; and the macro base station sends the differentiating parameter to the user equipment so as to enable the user equipment to generate a key used for the communication between the user equipment and the target base station according to the differentiating parameter and the temporary key shared by the macro base station and the user equipment.

主权项

1. A key isolation method, comprising:
generating, by a macro base station, a key for use in communication of a destination base station with a User Equipment, UE, from a distinguishing parameter of the destination base station and a temporary key shared by the macro base station with the UE, upon deciding user plane bearers of the UE to be handed over; and transmitting, by the macro base station, the distinguishing parameter to the UE so that the UE generates the key for use in communication of the UE with the destination base station from the distinguishing parameter, and the temporary key shared by the UE with the macro base station; wherein the destination base station is a destination local base station; and if the macro base station decides the user plane bearers of the UE to be handed over from the macro base station to the destination local base station or decides the user plane bearers of the UE to be handed over from a local base station where the UE is currently located to the destination local base station, then the method further comprises: transmitting the generated key to the destination local base station; wherein the macro base station has the entire user plane and control plane protocol stacks, and the local base station has the entire user plane protocol stack and a part of the Radio Resource Control (RRC) protocol function.