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AuthorMohamed, Amr
AuthorAlnuweiri, Hussein
Available date2009-12-27T06:16:32Z
Publication Date2009-01-12
Publication NameEurasip Journal on Wireless Communications and Networking
CitationMohamed, A., & Alnuweiri, H. (2009). Cross-layer optimal rate allocation for heterogeneous wireless multicast. Eurasip Journal on Wireless Communications and Networking, 2009
URIhttp://dx.doi.org/10.1155/2009/467182
URIhttp://hdl.handle.net/10576/10465
AbstractHeterogeneous multicast is an efficient communication scheme especially for multimedia applications running over multihop networks. The term heterogeneous refers to the phenomenon when multicast receivers in the same session require service at different rates commensurate with their capabilities. In this paper, we address the problem of resource allocation for a set of heterogeneous multicast sessions over multihop wireless networks. We propose an iterative algorithm that achieves the optimal rates for a set of heterogeneous multicast sessions such that the aggregate utility for all sessions is maximized. We present the formulation of the multicast resource allocation problem as a nonlinear optimization model and highlight the cross-layer framework that can solve this problem in a distributed ad hoc network environment with asynchronous computations. Our simulations show that the algorithm achieves optimal resource utilization, guarantees fairness among multicast sessions, provides flexibility in allocating rates over different parts of the multicast sessions, and adapts to changing conditions such as dynamic channel capacity and node mobility. Our results show that the proposed algorithm not only provides flexibility in allocating resources across multicast sessions, but also increases the aggregate system utility and improves the overall system throughput by almost 30% compared to homogeneous multicast.
Languageen
PublisherHindawi Publishing Corporation
SubjectHeterogeneous Wireless Multicast
SubjectCross-Layer Optimal Rate
TitleCross-Layer Optimal Rate Allocation for Heterogeneous Wireless Multicast
TypeArticle


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