Cooperative Transmission in a Wireless Relay Network based on Flow Management
Abstract
In this paper, a cooperative transmission design for a general multi-node half-duplex wireless relay network is presented. It is assumed that the nodes operate in half-duplex mode and that channel information is available at the nodes. The proposed design involves solving a convex flow optimization problem on a graph that models the relay network. A much simpler generalized-link selection protocol based on the above design is also presented. Both the proposed flow-optimized protocol and the generalized-link selection protocol are shown to achieve the optimal diversity-multiplexing tradeoff (DMT) for the relay network. Moreover, simulation results are presented to quantify the gap between the performances of the proposed protocols and that of a max-flow-min-cut type bound, in terms of outage probability.
Cite
@article{arxiv.0903.2820,
title = {Cooperative Transmission in a Wireless Relay Network based on Flow Management},
author = {Debdeep Chatterjee and Tan F. Wong and Tat M. Lok},
journal= {arXiv preprint arXiv:0903.2820},
year = {2009}
}
Comments
31 pages, 10 figures. First version submitted to Transactions on Communications, Nov. 2007. This is the revised detailed version. Further updated on Nov. 16, 2009 with minor modifications. To appear