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IEEE 802.11无线局域网已得到了广泛的部署.在无线局域网中,终端移动时经常发生切换,需要进行安全认证,这导致较长的处理时延,降低了服务质量.目前的认证方法,如AAA和IEEE 802.1x,不能支持低时延切换.本文提出了一种两级认证方法,移动终端在快速切换协议中可以执行认证.在漫游到新域之前从目标接入点获取一个临时身份,通过使用该临时身份继续认证快速接入.移动终端在短时间内必须执行再认证,以便完成正常的认证过程,否则,认证接入将被终止.仿真结果表明,本文提出的两级认证方法在切换过程中显著地减少了切换时延和丢包率.
IEEE 802.11 wireless LAN has been widely deployed in the wireless local area network terminal, mobile terminal often switch, the need for security certification, which led to longer processing delay and reduce the quality of service.At present authentication methods such as AAA and IEEE 802.1x, can not support low delay switching.This paper presents a two-level authentication method, the mobile terminal can perform authentication in the fast switching protocol.From the target access point to obtain a temporary identity before roaming to a new domain, by using The temporary identity continues to be authenticated and quickly accessed. The mobile terminal must perform reauthentication for a short period of time in order to complete the normal authentication process, otherwise, the authentication access will be terminated. The simulation results show that the proposed two-level authentication method during the handover process Significantly reduce the switching delay and packet loss rate.