Abstract
The inherent mesh infrastructure of IEEE 802.11-based wireless mesh networks provides added support to construct multiple robust paths. However, based on geometric locations of wireless nodes, neighborhood interference and channel contention impose challenges on multipath routing schemes. A large body of research has been carried out to maximize aggregate end-to-end throughput using multipath routing; however, interference has not been accurately modeled in majority of the work. Based on the relative location of transmitters and receivers, information asymmetric non-coordinated interference introduces bottleneck links and significantly reduces the aggregate throughput. The impact of this interference is even observed on links several hops away. In this paper, multipath routing is integrated with topology control to manage such multilevel asymmetric interference. An optimization model has been presented with an objective to achieve optimized end-to-end throughput using multiple available paths, considering coordinated and asymmetric non-coordinated interference. The goal of this research is to develop a multipath routing strategy which can achieve better end-to-end throughput by purging badly affected asymmetric non-coordinated interfering links during path construction procedure. The proposed model and routing strategy have been tested through extensive simulations. The results clearly exhibit the efficacy of the proposed approach, which achieves better aggregate end-to-end throughput compared to existing multipath routing schemes.
Highlights
IEEE 802.11-based wireless mesh networks (WMN) have emerged as a promising architecture to provide lastmile Internet connectivity to fixed and mobile users
Primary objective of this research is to show the effectiveness of combining the topology control to mitigate non-coordinated interference with multipath routing in wireless mesh networks to achieve significantly improved aggregate end-to-end throughput
The above examples illustrate that the approach of topology control for reducing non-coordinated interference and resulting in fewer but high-quality paths that can be used for multipath routing has merit
Summary
IEEE 802.11-based wireless mesh networks (WMN) have emerged as a promising architecture to provide lastmile Internet connectivity to fixed and mobile users. In case of non-coordinated interfering links, the two transmitters cannot sense the transmissions of each other This results in increased probability of collisions. An efficient routing scheme is required, which considers coordinated as well as asymmetric noncoordinated interactions of transmitters and receivers during path construction procedure to avoid such bottleneck links. Primary objective of this research is to show the effectiveness of combining the topology control to mitigate non-coordinated interference with multipath routing in wireless mesh networks to achieve significantly improved aggregate end-to-end throughput. The first phase of AMRTC performs topology control by identifying and pruning the multilevel non-coordinated interfering links. 2 Motivation This section highlights the significance of joint topology control and multipath routing in improving the end-to-end throughput of multihop wireless networks. The solid-headed arrows represent the directed links, while dotted lines connect nodes within carrier sensing range (in addition to connected nodes)
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