WiFi中多AP间快速切换的研究与实现

目前,WiFi已经成为了高速无线局域网的主要标准并且得到了广泛的应用。鉴于WiFi网络接入点（AP）覆盖范围小、移动用户需要频繁切换的特点,文中提出了多AP连接和嗅探扫描两种技术来实现多AP间的快速切换。多AP连接通过同时和多个AP保持通信切实保障了通信连续性,而嗅探扫描为更有效地获取周围AP信息提供了指导性方法。实验表明这些技术有效地加快了切换的速度,有效保障了用户的QoS。

Study and Implementation of Fast Inter-AP Handoffs in WiFi WLAN

WiFi has become one of the major high-speed WLAN protocols and has been widely applied recently. Due to the fact that WiFi Access Points （AP） could cover only a small area and mobile users have to make frequent handoffs among them, this paper proposes two techniques to enable fast handoffs, namely multiple AP connections and Sniff Scan. Multiple AP connections ensure the communication continuity by simulatneously keeping communication with several APs, while Sniff Scan provides guiding methodology for efficient acquisition of nearby AP information. Experiments on real test-beds show that the these two techniques could accelerate the handoff processes and ensure the user＇ s QoS.