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Being multi-hop wireless networks, Wireless Mesh Networks (WMNs) are witnessing limited network capacity, mainly due to the contention among nodes in multi-hop paths. Several techniques have been proposed to cope with the limitation, e.g., using multi-channels. These techniques, however, do not account for the very specificity of traffic flow in WMNs when used for last-mile Internet access. In this paper, the authors propose a multi-channel scheme that mitigates the network capacity limitation by accounting for the nature of traffic direction. This latter is mostly flowing towards/from the gateway connecting the WMN to the Internet, and forms a tree with the gateway as a root.
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