Cross-Layer Optimal Rate Allocation for Heterogeneous Wireless Multicast

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Cross-Layer Optimal Rate Allocation for Heterogeneous Wireless Multicast

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dc.contributor.author Amr, Mohamed
dc.contributor.author Alnuweiri, Hussein
dc.date.accessioned 2009-12-27T06:16:32Z
dc.date.available 2009-12-27T06:16:32Z
dc.date.issued 2009-01-12
dc.identifier.citation Volume 2009 (2009), Article ID 467182, 16 pages en_US
dc.identifier.uri http://dx.doi.org/10.1155/2009/467182
dc.identifier.uri http://hdl.handle.net/10576/10465
dc.description.abstract Heterogeneous 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. en_US
dc.language.iso en en_US
dc.subject Heterogeneous Wireless Multicast en_US
dc.subject Cross-Layer Optimal Rate en_US
dc.title Cross-Layer Optimal Rate Allocation for Heterogeneous Wireless Multicast en_US
dc.type Article en_US

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