一种802.11 s无线Mesh网络快速切换方案

In order to guarantee that a mobile station without mesh function can still keep a high transmission rate while it moves fast between wireless access points in the wireless mesh network (WMN), a layer two (L2) fast transition scheme based on 802.11 s WMN was proposed. This scheme employs the idea of cross-layer design, and the whole transition process is implemented at L2. It considers the information both from LLC (logic link control) sub-layer and from MAC (medium access control) sub-layer, combines and improves the related 802.11 s schemes to greatly raise the efficiency of the transition. The simulation results show that compared with the transition scheme defined in the 802.11 s draft, the fast transition scheme can decrease the transition delay by 2 to 4 times and the number of packet drop by 2 to 8 times.