Method, device and system for generating key

Abstract

The invention discloses a method for generating a key. The method is suitable for a scene of relay station switching and comprises the following steps that: a source base station calculates a key parameter K1 according to a key K between the source base station and a relay station and an identification parameter of a target base station, wherein the identification parameter of the target base station is used for uniquely identifying the target base station; and the source base station sends the K1 to the target base station so that the target base station acquires a key K2 between the target base station and the relay station according to the K1. The embodiment of the invention also provides a system for generating the key and the base stations and the relay station for the relay station switching scene. Through the technical scheme provided by the embodiment of the invention, the relay station can generate the key used between the relay station and the target base station, or the target base station generates the key used between the target base station and the relay station, so that the double parties can communicate with each other smoothly and communication security is enhanced.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a key generation technology. Background technique [0002] With the increase of wireless communication network coverage and the improvement of cell edge performance requirements, relay technology is introduced into wireless communication systems. The introduction of a relay station (Relay Node, RN) can increase the coverage of high-speed data transmission, group mobility, temporary network deployment and extension, and enhance the coverage of the cell edge. [0003] For example, an RN may be set on a high-speed moving vehicle, and the RN may provide services for user equipment (User Equipment, UE) on the high-speed moving vehicle, thereby avoiding frequent handover of a large number of UEs. [0004] In order to ensure the security of communication, it is necessary to encrypt the messages transmitted on the wireless link, and the encryption can also be applied to...

AI Technical Summary

Problems solved by technology

[0006] However, after the RN is introduced, when the RN switches between different base stations, there is no plan for how the RN obtains the key between the RN and the target base station, and there is no plan for how the target base station obtains the key between the RN and the target base station. Therefore, After the handover, the RN cannot use the key to communicate with the target base station, resulting in the inability to communicate between the RN and the target base station, or causing a huge security risk in the communication between the RN and the target base station

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