NAS message processing method and device when nas COUNT rolls over

A processing method and message technology, applied in the communication field, can solve problems such as failure to consider UE behavior status, user complaints, and service failure
CN103476028BActive Publication Date: 2017-04-05DATANG MOBILE COMM EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
DATANG MOBILE COMM EQUIP CO LTD
Publication Date
2017-04-05

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Abstract

The present invention provides a method and device for processing NAS messages when NAS COUNT is reversed, wherein the method includes: the MME and the UE perform the first authentication and key negotiation authentication process AKA1, and when AKA1 is successful , the MME establishes the first security context KASME1 for message interaction with the UE; when the NAS COUNT reaches the preset rollover threshold, the MME uses the first security context KASME1 to conduct a second authentication with the UE The right and key agreement authentication process AKA2; if the AKA2 fails, the MME does not use the KASME1 to perform the third authentication and key agreement AKA3 authentication process with the UE; when the AKA3 succeeds, the MME A second security context KASME2 for message exchange with the UE is established. The present invention greatly improves the user's perception experience, greatly reduces the signaling message interaction between the UE and the network side, saves wireless air interface resources between the UE and the wireless side, and effectively reduces the impact on the LTE network.
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Description

technical field

[0001] The present invention relates to the field of communication technology, in particular to a method and device for processing NAS messages when NAS COUNT is reversed. Background technique

[0002] In the LTE (Long Term Evolution, long-term evolution) network, the NAS (Non Access Stratum, NonAccess Stratum) message transmission between MME (Mobility Management Entity, mobile management entity) and UE (User Equipment, user equipment) requires integrity Protection and security protection. The MME can decide which security algorithm to use according to the network capability reported by the UE and the security algorithm capability and priority configured by the MME. The network capability refers to the integrity protection algorithm and encryption and decryption supported by the UE when accessing the LTE network. algorithm. When the MME determines the security algorithm and successfully establishes the security context with the UE, all NAS messages exchang...

Claims

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