Cooperative transmission in a wireless relay network based on flow management

  • Authors:
  • Debdeep Chatterjee;Tan F. Wong;Tat M. Lok

  • Affiliations:
  • Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL;Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL;Department of Information Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong

  • Venue:
  • IEEE Transactions on Communications
  • Year:
  • 2010

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Abstract

Cooperative transmission protocols using a flow optimization approach for a general multi-node half-duplex wireless relay network are presented. The proposed design involves solving a convex flow optimization problem on a graph that models the relay network. Two protocols are developed using the techniques of broadcasting (BC), multiple-access (MA), and time sharing (TS), and both are shown to achieve the optimal diversity-multiplexing tradeoff (DMT). Simulation results are used to quantify the performances of the proposed protocols in terms of outage probabilities, and to compare them against the max-flow-min-cut bound.