We study the problem of achieving maximum network throughput with fairness among the flows at the nodes in a wireless mesh network, given their location and the number of their half-duplex radio interfaces. Our goal is to find the minimum number of non-overlapping frequency channels required to achieve interference-free communication. We use our existing Select x for less than x topology control algorithm (TCA) to build the connectivity graph (CG), which enhances spatial channel reuse to help minimize the number of channels required. We show that the TCA-based CG approach requires fewer channels than the classical approach of building the CG based on the maximum power. We use multi-path routing to achieve the maximum network throughput and show that it provides better network throughput than the classical minimum power-based shortest path routing. We also develop an effective heuristic method to determine the minimum number of channels required for interference-free channel assignment.

Additional Metadata
Keywords Channel assignment, Fairness, Interference-free, Maximum throughput, Multi-radio multi-channel, Wireless mesh networks
Persistent URL dx.doi.org/10.1186/1687-1499-2013-229
Journal Eurasip Journal on Wireless Communications and Networking
Citation
Chaudhry, A.U. (Aizaz U.), Chinneck, J, & Hafez, R. (2013). On the number of channels required for interference-free wireless mesh networks. Eurasip Journal on Wireless Communications and Networking, 2013(1). doi:10.1186/1687-1499-2013-229