基于WAPI的无线局域网快速切换的研究与实现

摘要

为了解决在无线局城网中移动终端切换时产生的时延和抖动对实时业务质量的严重影响,通过分析移动终端媒体访问控制层切换的过程和无线局域网鉴别和保密基础结构,提出了一种基于证书预鉴别的WAPI快速切换算法.该算法采用扫描和切换阈值,通过对证书进行预鉴别,有效地减少了切换过程中的扫描和认证时延,提高了切换效率.在无线网卡驱动中,对该算法完成了软件实现,并且在嵌入式移动终端中进行了测试,结果表明了该算法的良好效果.%To solve the seriously affect of both latency and jittering on real-time service while handoffin WLAN.The process ofhandoff in media access control and wireless local area network authentication and privacy infrastructure are analyzed.A fast handoff algorithm based on pre-authentication of certificate in WAPI is presented.The Algorithm uses scanning and authenticate threshold, and pre-authentic ate of the certificate to decrease the latency of scanning and authentication.The program for the algorithm is accomplished in wireless network adapter driver, and the test is realized in the embedded terminal.