On seamless connectivity over multi-radio and multi-channel wireless mesh networks

ABSTRACT

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.

REFERENCES

• 1: Richard Draves , Jitendra Padhye , Brian Zill, Routing in multi-radio, multi-hop wireless mesh networks, Proceedings of the 10th annual international conference on Mobile computing and networking, September 26-October 01, 2004, Philadelphia, PA, USA [doi>10.1145/1023720.1023732]
• 2: Eddie Kohler , Robert Morris , Benjie Chen , John Jannotti , M. Frans Kaashoek, The click modular router, ACM Transactions on Computer Systems (TOCS), v.18 n.3, p.263-297, Aug. 2000 [doi>10.1145/354871.354874]
• 3: J. Macker and S. D. Team. Simplified Multicast Forwarding for MANET. Work in Progress, Feburary 2008.
• 4: H. Velayos and G. Karlsson. Techniques to Reduce IEEE 802.11b MAC Layer Handover Time. Technical report, KTH, Royal Institute of Technology, 2003.

INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.1 Network Architecture and Design
          Subjects: Wireless communication

Additional Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.0 General
          Subjects: Data communications
  C.3 SPECIAL-PURPOSE AND APPLICATION-BASED SYSTEMS
      Subjects: Signal processing systems

General Terms:
Design, Experimentation, Measurement, Performance