Architecture supporting bi-directional handoff in wireless mesh networks

为了实现无线网状网络双向切换前后的快速路由重建，提出了基于VLAN的二层路由方案。该方案的基本配置需要划分与mesh网络中接入点（AP）数量相等的vlan，且在AP数量上的可扩展性有限。为了克服这个问题，我们提出了改进方案的配置，在保持路由性能的同时显著减少了所需的vlan数量。性能评价表明，改进后的配置与基本配置相比，所需的VLAN数量减少了10%，路由跳长度与基本配置相比增加了5%以内。

We have proposed Layer 2 routing scheme using VLAN for bi-directional handoff performed in wireless mesh networks aiming at fast route reconstruction before and after handoff. The basic configuration of the proposed scheme needs VLANs the number of which equal to the number of access points(AP) in the mesh networks, and its scalability in terms of number of APs is limited. To overcome this problem we proposed improved configuration of the proposed scheme which significantly reduces the number of required VLANs while maintaining routing performance. The performance evaluation shows the improved configuration reduces the number of required VLAN by 10% compared with the basic configuration, while it achieves the increase of the route hop length constructed in this configuration compared with the basic configuration within 5%.