Method and system for generating cryptographic-key identification identifier when transferring user equipment

Abstract

The invention discloses a method and system for generating cipher key identification identifier when transferring user equipment. The method includes: when the user equipment transfers from an evolution terrestrial radio access network to a target system, a mobile management unit transmits identification identifiers accessing to safety management entity cipher key, to service universal packet radio service (GPRS) supporting nodes, the service GPRS supporting nodes and user equipment map the identification identifiers accessing to safety management entity cipher key as cipher key identification identifiers of the target system. The method can resolve the problem in the prior technology of no identification identifier in the cipher key mapped from the access safety management entity cipher key produced in the transfer process, after the user equipment transfers from the evolution terrestrial radio access network to a terrestrial radio access network or a GPRS / improved data rate GSM service radio access network.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a method and system for generating a key identity identifier when user equipment is transferred. Background technique [0002] In a mobile communication system, when UE (User Equipment) transfers between different access systems, the security parameters of the Source Service Network (Source Service Network) need to be mapped to security parameters that can be identified and used by the Target Service network , to make the transfer successful and open for business. These security parameters include keys, key identifiers, counters, security algorithms, etc. [0003] The 3GPP evolved packet system (EPS, Evolved Packet System) is composed of an evolved terrestrial radio access network (EUTRAN, Evo1ved UMTS Terrestrial Radio Access Network) and an EPS core network (EPC, Evolved Packet Core). [0004] Among them, the EPC includes a mobility management entity (MME, mobility...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a method and a system for generating a key identity identifier during user equipment transfer, which can solve the problems caused by K during the transfer process after the user equipment is transferred from EUTRAN to UTRAN or GERAN ASME The problem that the mapped key has no identifier

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