Cooperative Transmission in a Wireless Relay Network based on Flow Management
Debdeep Chatterjee, Tan F. Wong, and Tat M. Lok

TL;DR
This paper introduces a flow management-based cooperative transmission design for multi-node half-duplex wireless relay networks, optimizing diversity-multiplexing tradeoff and outperforming traditional bounds.
Contribution
It presents a novel convex flow optimization approach and a simplified generalized-link selection protocol that achieve optimal DMT in relay networks.
Findings
Protocols achieve the optimal diversity-multiplexing tradeoff.
Simulation results quantify performance gap to max-flow-min-cut bounds.
Proposed methods outperform existing bounds in outage probability.
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.
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Taxonomy
TopicsCooperative Communication and Network Coding · Mobile Ad Hoc Networks · Advanced MIMO Systems Optimization
