Using Orthogonal Channels for Supporting Multicast Service in Multi-channel Wireless Mesh Networks

TL;DR

This paper introduces EWM, a distributed multicast tree construction method for multi-channel wireless mesh networks that assigns orthogonal channels to reduce interference and improve throughput, especially for multimedia applications.

Contribution

It proposes a novel distributed multicast tree construction algorithm using orthogonal channels and delay-based route selection for enhanced performance.

Findings

EWM outperforms MCM in NS2 simulations.

Reduced interference and increased throughput achieved.

Tree structure optimized for multimedia applications.

Abstract

Unlike wired networks, the capacity of a wireless network is interference limited due to the broadcast nature of wireless medium. Some multicast wireless network protocols do not consider channel assignment issue, that they cause interference at transmission nodes, hence do not use full capacity of the network. Interference can be reduced and throughput improved with the use of multichannel features. Therefore, this paper used orthogonal channels for sending and receiving nodes in the network. We propose EWM (Efficient Wireless Multicast) method that is distributed scheme for constructing multicast tree in multi-channel multi-interface wireless mesh networks (MIMC-WMN) which selects relay nodes and in distributed form assign orthogonal radio channels to them. To more decrease of interference in adding a branch to the tree, the route with minimum end-to-end delay from the source to the multicast receiver will be chosen. Thus, the tree is suitable for multimedia applicants. We also employ the broadcast nature of the wireless media to reduce the number of relay nodes. The proposed algorithm is compared with MCM algorithm in NS2.