Method and system for authenticating UE during interoperation from EPS to 5GS

Abstract

The invention provides a method and system for authenticating UE during interoperation from EPS to 5GS. The method comprises the steps that UE carries encrypted information in 5GS registration requestinformation, or the encrypted information and first source information are sent to an MME through an AMF, then the MME decrypts the encrypted information to obtain decrypted information and the decrypted information is compared and verified with the first source information of the UE to complete UE authentication, or the UE carries second source information in the 5GS registration request message, obtains a first integrity check result corresponding to the second source information through a preset algorithm and sends the first integrity check result to the MME through the AMF, and then the MME obtains a second integrity check result corresponding to the second source information through a preset algorithm according to the obtained second source information and compares the second integrity check result with the first integrity check result to complete UE authentication. According to the invention, air interface resources can be saved, network burden and coupling between modules are effectively reduced, and efficient integration of 4G and 5G networks is promoted.

Description

technical field [0001] The present invention relates to the technical field of interoperability between EPS and 5GS, and in particular to a method and system for authenticating UE during interoperation from EPS to 5GS. Background technique [0002] Currently, the 5G (5th-Generation, fifth-generation mobile communication technology) protocol is being formulated, among which is the interoperability between 5GS (5G System, 5G System) and EPS (Evolved Packet System, Evolved Packet System). The concept of registration mode is introduced. The registration mode in 5G is divided into two types: single registration and dual registration. In single registration mode, UE (User Equipment, user equipment) maintains a single registration state in 5GS and EPS. In dual registration mode, UE maintains a single registration state in 5GC (5G core network, 5G core network). and EPC (Evolved Packet Core, the all-IP packet core network is the 4G core network) to maintain their own independent re...

AI Technical Summary

Problems solved by technology

[0006]Since the 4G NAS TAU request message is carried in the 5G NAS message, the UE needs to consider how to obtain or construct the TAU request message in the 5G NAS message. The TAU request message contains the mandatory fields and optional fields, and some fields such as GUTI (Globally Unique Temporary UE Identity, Globally Unique Temporary UE Identity), UE networkcapability (data transmission capability supported by UE), etc. are longer in length. After these fields are sent to MME, MME will not Parsing does not care about the specific content of these fields. Therefore, carrying these fields will not only cause a waste of air interface resources, but also use 4G NAS messages in the 5G NAS module, which greatly increases the coupling between modules.

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