In order to transmit the security of NAS message effectively, a method of NAS(Non-Access-Stratum) security implementation is proposal, according to characters and protocol specification of NAS security. By the design of common standard interface, the communication parameters of the process shall been transferred effectively. At the same time, the UE and the MME are divided into different modules. By this method, compatibility and reliability shall been strengthen greatly. After the analysis and the Process Implementation, this method shall deal with the NAS security issue and make transmit successful truth.
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