Radio access network notification area updating method and device, terminal and base station

A technology of wireless access network and regional update, applied in the field of communication
CN110636499AActive Publication Date: 2019-12-31DATANG MOBILE COMM EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
DATANG MOBILE COMM EQUIP CO LTD
Publication Date
2019-12-31

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Abstract

The invention provides a wireless access network notification area updating method and device, a terminal and a base station. The radio access network notification area updating method comprises the following steps: when a terminal is in an RRC inactive state, sending an RRC recovery request to a base station, and if an RRC message fed back by the base station is received, comparing whether a first NCC value and a second NCC value are the same or not; if the first NCC value is the same as the second NCC value, deleting an access layer root key generated according to the first NCC value and other keys and security tokens generated by using the root key, and recovering a security context held before sending the RRC recovery request message to the base station; wherein the first NCC value isan NCC value in a first RRC release message received most recently before the RRC recovery request message is sent to the base station, the second NCC value is an NCC value in an RRC message fed backby the base station, and the RRC message comprises an RRC recovery message or an RRC release message. According to the scheme, the problem that in the prior art, safety risks exist in the RNAU processwithout executing anchor point transfer is solved.
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Description

technical field

[0001] The present invention relates to the field of communication technology, in particular to a wireless access network notification area update method, device, terminal and base station. Background technique

[0002] A new RRC (Radio Resource Control) state is defined in the New Radio (New Radio Interface, NR) network: RRCInactive (RRC inactive state). When a user terminal (UE) enters the RRC Inactive state, the network side configures a radio access network notification area (RNA) and a timer for the UE. If the user terminal is in the RNA and the timer has not expired, then the terminal can remain in the RRC Inactive state, that is, the connection is suspended, and does not perform any communication with the network side. If the network side needs to contact the terminal, it will page the terminal within the RNA. If the user terminal moves out of the RNA, or the timer expires, the terminal will initiate a radio access network notification area update (R...

Claims

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