Zte Corporation

Jinglan Li

Bo Wang

Lu Gan

Chao Gao

Xintai Wang

Wei Si

Ang Fu

The disclosure discloses a method and a system for synchronizing an Access Stratum (AS) security algorithm. The method comprises: a control plane notifying a user plane to start a decryption exception detection when sending an Radio Resource Control (RRC) connection re-establishment message (); the user plane performing the decryption exception detection on a service message received after the RRC connection re-establishment, and sending a decryption exception instruction to the control plane when discovering the decryption exception of the service message (); and the control plane performs a corresponding exception process according to the decryption exception instruction (). With the method, the exception of the AS security algorithm configured for User Equipment (UE) in the RRC connection re-establishment is discovered in time, the bandwidth waste caused by invalid data packets of an air interface is maximally avoided, and the prompt exception recovery is improved, so as to further improve the user experience before and after a handover.

Method and system for synchronizing access stratum security algorithm

This disclosure claims a method for security processing during RRC connection re-establishment, comprising: a UE sends an RRC connection re-establishment request message to the eNB; after receiving the request message, the eNB determines whether an original access layer security algorithm used by the UE is supported by the eNB itself according to the current status and configuration; if supported, the communication protection with UE is implemented via the original access layer security algorithm; if not supported, according to the security capability of UE, the access layer security algorithm which has the highest priority and is supported by the UE is selected from the access layer security algorithms configured by the eNB itself to be the new access layer security algorithm, and the communication protection between the eNB and the UE is implemented by the new access layer security algorithm. This disclosure also claims a system for security processing during the RRC connection re-establishment.

Method and system for security processing during RRC connection re-establishment

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Shenzhen, China

Jinglan Li