Title: Interference-aware QoS routing and dynamic channel assignment for multi-radio multi-channel wireless mesh network

Authors: ChuanXin Zhao; FuLong Chen; Yang Wang; XiaoYao Zheng

Addresses: School of Mathematics and Computer Science, Anhui Normal University, No. 1, East Beijing Road Wuhu, 24100, China ' School of Mathematics and Computer Science, Anhui Normal University, No. 1, East Beijing Road Wuhu, 24100, China ' School of Mathematics and Computer Science, Anhui Normal University, No. 1, East Beijing Road Wuhu, 24100, China ' School of Mathematics and Computer Science, Anhui Normal University, No. 1, East Beijing Road Wuhu, 24100, China

Abstract: QoS routing in multi-channel wireless mesh networks protocols is a very challenging problem. In this paper, we propose an on-demand bandwidth-constrained routing protocol combined with dynamic channel assignment for multi-radio multi-channel wireless mesh networks with the IEEE 802.11 DCF MAC protocol. A multi-channel available bandwidth estimation method is proposed which is based on the exchange of the bandwidth information for neighbour nodes at first, then a new jointing channel assignment and routing algorithm is designed which dynamically assigns the channel through the available bandwidth in the routing process according to the requirement of bandwidth, distributed call admission control is integrated to prevent network overload and the optimal path metric is advised to establish interference-aware QoS routing. Simulation results show that the routing algorithm can reduce co-channel interference and improve network performance and acceptance rate through assigning channels dynamically.

Keywords: multi-radio WMNs; multi-channel WMNs; interference-aware QoS routing; dynamic channel assignment; wireless mesh networks; quality of service; bandwidth constraints; available bandwidth estimation; distributed call admission control; network overload; optimal path metrics; simulation; co-channel interference; network performance; acceptance rate.

DOI: 10.1504/IJMNDI.2014.067186

International Journal of Mobile Network Design and Innovation, 2014 Vol.5 No.4, pp.238 - 248

Available online: 23 Jan 2015 *

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