Open Access

A Distributed Cross-Layer Optimization Method for Multicast in Interference-Limited Multihop Wireless Networks

  • Mohammad H. Amerimehr1,
  • Babak H. Khalaj1Email author and
  • Pedro M. Crespo2
EURASIP Journal on Wireless Communications and Networking20082008:702036

DOI: 10.1155/2008/702036

Received: 2 February 2008

Accepted: 6 June 2008

Published: 18 June 2008

Abstract

We consider joint optimization of data routing and resource allocation in multicast multihop wireless networks where interference between links is taken into account. The use of network coding in such scenarios leads to a nonconvex optimization problem. By applying the probability collectives (PCs) technique the original problem is turned into a new problem which is convex over probability distributions. The resulting problem is then further decomposed into a data routing subproblem at network layer and a power allocation subproblem at physical layer in order to achieve a cross-layer distributed solution for the whole range of SINR values. The proposed approach is also extended to minimum cost multicast problems and routing problems based on multicommodity flow and single Steiner tree, resulting in new distributed algorithms for such problems.

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Authors’ Affiliations

(1)
Department of Electrical Engineering, Sharif University of Technology
(2)
Centro de Estudios e Investigaciones Técnicas de Gipuzkoa (CEIT) and Tecnun, University of Navarra

Copyright

© Mohammad H. Amerimehr et al. 2008

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.