A Novel method of routing in multi-channel multi-radio wireless mesh networks

Abstract

Abstract In mesh networks, wireless mesh nodes include routers and mesh clients. In a wireless mesh network, the use of single-radio nodes operating on a single channel will reduce the capacity of the mesh network, and equipping the nodes with multiple radios, this operation on a non-overlapping channel will greatly increase the capacity and available bandwidth of the network. If the number of radios used increases the number of channels that can be used for the nodes, it will cause the links to use the same channels and lead to interference between the links. In this paper, two algorithms are proposed for multi- channel mesh network for routing selection. The first proposed algorithm is to allocate channels in multi-radio and multi-channel wireless mesh networks with tree structure, colonial competition and clustering algorithms, using the available bandwidth criteria, distance to destination. The load density of each node tries to form high-rate multi-channel paths. In the second algorithm, each router determines its priority in selecting the channel by considering the amount of potential interference in its interference range. The performance of the proposed protocols was compared with CAMF protocol and FB_MR routing protocol. Network productivity rate, end-to-end latency, number of lost packets are among the criteria used to compare the performance of the proposed method. The simulation was performed on OPNET pseudo-emulator version 10.5. The simulation results show better performance of the proposed ICA_MR colonial competition protocol than the RLFB_MR reinforcement learning method and the CAMF protocol and the FB_MR routing protocol.