Cross-layer distributed approach for optimal rate allocation for homogeneous wireless multicast

TitleCross-layer distributed approach for optimal rate allocation for homogeneous wireless multicast
Publication TypeJournal Article
Year of Publication2007
AuthorsMohamed, A., and H. Alnuweiri
JournalCommunications, IET
Pagination838 -845
Date Publishedoct.
Keywordsaccess protocols, ad hoc networks, cross-layer distributed approach, distributed algorithms, homogeneous wireless multicast sessions, iterative algorithm, iterative methods, MAC layer, multicast protocols, multicast-based data communication, multihop ad hoc networks, optimal rate allocation, optimisation, resource allocation, resource allocation problem, resource optimisation

Multicast-based data communication is an efficient communication scheme especially in multihop ad hoc networks where the MAC layer is based on one-hop broadcast from one source to multiple receivers. The problem of resource allocation for a set of homogeneous multicast sessions over multihop wireless network is addressed. An iterative algorithm is proposed that achieves the optimal rates for a set of multicast sessions such that the aggregate utility for all sessions is maximised. The authors demonstrate analytically and through simulations that the algorithm achieves optimal resource utilisation while guaranteeing fairness among multicast sessions. The algorithm in network environments with asynchronous distributed computations has been further analysed. Two implementations for the algorithm based on different network settings are presented and show that the algorithm not only converges to the optimal rates in all network settings but it also tracks network changing conditions, including mobility and dynamic channel capacity.


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