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Disjoint Path Routing for Multi-Channel Multi-Interface Wireless Mesh Network

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Author(s): Takeshi Ikenaga | Koji Tsubouchi | Daiki Nobayashi | Yutaka Fukuda

Journal: International Journal of Computer Networks & Communications
ISSN 0975-2293

Volume: 3;
Issue: 2;
Start page: 165;
Date: 2011;
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Keywords: Wireless Mesh Network | IEEE 802.11 | Interface Switching | Disjoint Paths | Routing

ABSTRACT
Dynamic Channel Switching System (DCSS) has been proposed as a solution to improve the capacity ofWireless Mesh Networks (WMNs) which is compliant with IEEE 802.11 standards. DCSS divides wirelessinterfaces into data receiving and data sending interfaces. The receiving interfaces stay on specifiedchannels, while the sending interfaces can be switched as necessary. A node sends the data by switchingthe sending interface to the channel assigned to the receiving interface of the communicating node.However, outward and return paths routed by conventional routing algorithms are generally the same. Asa result, intermediate nodes have to switch their interface channel frequently and compete with othernodes to use receiver's channel. This leads to significant degradation in their throughput. Therefore, thispaper proposes a disjoint path routing scheme in order to prevent the frequent interface switching andimprove the throughput performance in the WMN. Simulations revealed that the proposed routing schemecan produce excellent performance compared with the conventional routing schemes.
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