Enhancing Multi-layer Multicast Routing in Wireless Mesh Networks by Exploiting Wireless Broadcast Advantage

This paper investigates the problem of multicast communication in wireless mesh networks (WMNs). The proposed algorithm uses the multi-layer scheme, in which the multicast data is encoded into multiple layers, to handle bandwidth heterogeneous receivers. Additionally, it exploits two techniques to increase the number of obtained layers by the receivers, namely network coding and wireless broadcast advantage (WBA). Incorporating WBA necessitates determining the children of the nodes, which complicates the design. To solve the problem in polynomial time, the network is partitioned into some groups, and each group is considered independently. The grouping technique is also used to determine the obtained layers by each receiver. The simulations demonstrate that our algorithm considerably outperforms the previous approaches.