In IEEE802.11 wireless mesh networks (WMN), we had suffered from performance degradation caused by contention and interference. To avoid the issue with a reasonable cost, we have been working on the configuration where nodes are equipped with multiple commodity IEEE802.11 interfaces and antennas. Although the WMNs of the configuration were segmented by multi-channelized links, traditional applications needed it to be a single-tier and easy-to-use network. In this paper, we present a scheme introducing a virtual link layer that allows mobile nodes to move around without changing its identifier and losing its connectivity to such kind of WMNs. We have implemented a prototype system of our scheme using the click modular router framework [2]. We have confirmed that existing applications, such as DHCP and mDNS, run on the multi-radio and multichannel WMN without any modification.
['Sho Fujita', 'Tadashi Yasumoto', 'Hiroshi Esaki']
On seamless connectivity over multi-radio and multi-channel wireless mesh networks