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Optimal resource allocation in wireless ad hoc networks: A price-based approach

IEEE TRANSACTIONS ON MOBILE COMPUTING 2006年第4期5卷 347-364页

作者： Xue, Y Li, BC Nahrstedt, K Vanderbilt Univ Dept Elect Engn & Comp Sci Nashville TN 37235 USA Univ Illinois Dept Comp Sci Siebel Ctr Comp Sci Urbana IL 61801 USA Univ Toronto Dept Elect & Comp Engn Toronto ON M5S 3G4 Canada

The shared-medium multihop nature of wireless ad hoc networks poses fundamental challenges to the design of effective resource allocation algorithms that are optimal with respect to resource utilization and fair across different network flows. None of the existing resource allocation algorithms in wireless ad hoc networks have realistically considered end-to-end flows spanning multiple hops. Moreover, strategies proposed in wireline networks are not applicable in the context of wireless ad hoc networks, due to their unique characteristics of location-dependent contention. In this paper, we propose a new price-based resource allocation framework in wireless ad hoc networks to achieve optimal resource utilization and fairness among competing end-to-end flows. We build our pricing framework on the notion of maximal cliques in wireless ad hoc networks, as compared to individual links in traditional wide-area wireline networks. Based on such a price-based theoretical framework, we present a two-tier iterative algorithm. Distributed across wireless nodes, the algorithm converges to a global network optimum with respect to resource allocations. We further improve the algorithm toward asynchronous network settings and prove its convergence. Extensive simulations under a variety of network environments have been conducted to validate our theoretical claims.

关键词： wireless communication algorithm/ protocol design and analysis nonlinear programming

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