Date Added: Nov 2012
In this paper, the multicast routing problem in wireless relay networks is considered. The resource allocation problem in IEEE 802.16j WIMAX Networks is discussed. The relay stations are used to improve the transmission quality in WIMAX networks. Most existing approaches try to reduce the energy consumption of a multicast tree. In contrast, the maximization problem to increase the number of recipients within the given resource is addressed. In recent years various resource allocation schemes for maximization problem is discussed. To have a comprehensive understanding of resource allocation schemes, a comparison of these schemes is discussed detail in this paper.