METHOD FOR KEY MANAGEMENT, METHOD AND DEVICE FOR DETECTING AUTHORIZATION

摘要

A method for key management, and a method and device for detecting authorization are provided in embodiments of the invention, wherein said method for key management includes the following steps: a Radio Resource Control (RRC) connection rebuilding request sent by a User Equipment (UE), after a Radio Link Failure (RLF) occurs between the UE and the first Relay Node (RN) in a communication process, is received; whether said first Relay Node (RN) belongs to said base station is judged; if yes, whether said RRC connection rebuilding request is authorized is detected by said first RN; if said RRC connection rebuilding request is authorized, thus according to the KeNB* of a target cell and the security algorithm of the target cell, the Access Stratum Key is calculated. With the method and device provided by embodiments of the invention, in the scenario when the RLF occurs in the RN, during the process that UE initiates a RRC connection rebuilding to cells under the Donor eNB (DeNB) or other RN cells under the same DeNB, the RRC connection rebuilding failure caused by no key or other security parameters in the target cell and the resulted dropped call can be avoided