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Title: Multipath Routing over Wireless Mesh Networks
Authors: XU JINYU
Keywords: WMNs, multipath, multi-channel, multi-radio, routing, protocol
Issue Date: 11-Jan-2012
Citation: XU JINYU (2012-01-11). Multipath Routing over Wireless Mesh Networks. ScholarBank@NUS Repository.
Abstract: Wireless Mesh Networks (WMNs) are self-organized multi-hop networks, which have been widely deployed to provide wireless Internet access. WMNs forward data via omni-directional antenna. Consequently, the performances of WMNs are always limited by interference. Multipath routing, however, can also take advantage of broadcast nature of omni-directional radio to improve performance. To the best of our knowledge, tens of multipath routing protocols have been designed over wireless networks for different purposes up to now, but few of them have been evaluated on real testbed. We extend SRCR into multipath routing protocol for a multi-radio, multi-channel network with Click and evaluate it on the testbed consisting of twenty nodes. Our contributions are twofold. First, we verify interference between different channels.Results show that channels of IEEE 802.11b interfere with each other due to close interface effect. But, channels at 2GHz and 5GHz bands can work simultaneously without any interference. Second, we conduct a series of experiments to investigate how path metric, path selection scheme, and other parameters affect the throughput of our implementation. It turns out that path selection scheme is the most important factor determining throughput and throughput can be largely increased if node disjoint scheme is adopted instead of link disjoint scheme. Cache and query frequency can only slightly affect mesh network performance. These results are valuable to gradually improve multipath routing protocol design in future.
Appears in Collections:Master's Theses (Open)

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