Security negotiation method and apparatus when switching between different wireless access technologies

Abstract

The embodiment of the invention provides a method for security negotiation when switching is performed among different wireless access technologies, and the device thereof. The method mainly comprises that the security information of an NAS (non access stratum) and an AS (access stratum) which are selected by a target system is included in a transparent container when the terminal performs switching among different wireless access technologies; the content in the transparent container is transmitted to the terminal, and the terminal performs security negotiation according to the content in the transparent container and the target system. The device mainly comprises an eNB (eNB) equipment and a resource access network equipment. Through the invention, when the foreign system is switched to the LTE (long term evolution) system at the terminal, the terminal can obtain the parameter information of the cryptographic keys of the NAS and the AS selected by the LTE system, and performs security negotiation with LTE system.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method and device for security negotiation when switching between different wireless access technologies. Background technique [0002] In a mobile communication system, when a terminal moves from a local base station to a target base station, handover between base stations is usually involved. The wireless access network of the base station includes 2G (Second Generation, second generation mobile communication), 3G (Third Generation , third-generation mobile communications) and future LTE (Long Term Evolve, long-term evolution) systems, etc., and the security protection levels and protection measures between terminals and various wireless access networks are different. [0003] The schematic diagram of the structure of the two security-related layers in the LTE system is as follows: figure 1 shown, from figure 1 It can be seen that the Xu interface, S1-C, S1-U, and X2 int...

AI Technical Summary

Problems solved by technology

When switching between 2G and 3G, the security information processed on the SGSN side only involves the AS, not the security information of the NAS. Therefore, the above-mentioned process of negotiating between the terminal and the 2G or 3G system cannot be applied to the terminal switching from 2G or 3G to LTE systematic process

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