Proceedings of the 7th ACM international symposium on Mobility management and wireless access
Proceedings of the 6th ACM symposium on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks
An interference-aware routing metric for Wireless Mesh Networks
International Journal of Mobile Communications
A dynamic channel assignment strategy based on cross-layer design for wireless mesh networks
International Journal of Communication Systems
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Wireless mesh networks (WMNs) are a promising technology for providing Internet connectivity to large residential areas. In a typical WMN deployment, end-users access the Internet through a backbone of static routers, which are responsible for traffic forwarding towards the closest Internet gateway (IG). In such a scenario, multiple paths may likely exist between the end-users and the IGs. For this reason, multi-path routing schemes appear as a viable approach to provide higher aggregate throughput, fault-tolerance and load-balancing properties. However, route-coupling problems may occur when the paths are concurrently used and certain nodes on separate paths are within each other's interference range. To overcome this problem, we propose a cross-layer architecture that comprises a novel joint multi-path routing and channel allocation scheme for multi-radio WMNs. The routing scheme discovers multiple node-disjoint paths between a source node (i.e. the end-user) and the gateway node. During the route setup, channel allocation is performed so that nodes on different paths, but within the same interference domain, transmit on different channels. As a result, the effect of route coupling is strongly mitigated. Moreover, we propose a load-balancing scheme, which allows to distribute traffic among the available node- and channel-disjoint paths. The simulation results show that the proposed scheme reduces the end-to-end delay and significantly enhances the system goodput over several network topologies and under different traffic workloads. Copyright © 2009 John Wiley & Sons, Ltd. In this paper, we propose a Channel Assignment and Multipath Routing Architecture (CAMRA) for effective channel allocation and load balancing over multi-radio wireless mesh networks. The routing scheme discovers multiple node-disjoint paths between the end-user and the gateway. During the route setup, channel allocation is performed so that nodes on different paths transmit on different channels. Moreover, a load-balancing scheme allows to distribute traffic among the available node- and channel-disjoint paths. The simulation results have confirmed the effectiveness of the CAMRA architecture in providing higher aggregate throughput when compared with popular routing protocols for wireless mesh networks. Copyright © 2009 John Wiley & Sons, Ltd.