Phoenix: making cooperation more efficient through network coding in wireless networks

Authors:
Andrea Munari;Francesco Rossetto;Michele Zorzi
Affiliations:
Department of Information Engineering, University of Padova, Padova, PD, Italy;DLR, German Aerospace Center, Institute of Communications and Navigation, Munich, Germany and Department of Information Engineering, University of Padova, Padova, PD, Italy;Department of Information Engineering, University of Padova, Padova, PD, Italy and University of California at San Diego, La Jolla, CA
Venue:
IEEE Transactions on Wireless Communications
Year:
2009

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Abstract

This paper introduces a novel MAC protocol for wireless networks, called Phoenix, that employs ideas from Network Coding to enhance decode and forward cooperation. A relay is allowed to code data of its own together with a corrupted packet during a retransmission at no additional cost in bandwidth. Therefore, while in conventional cooperative protocols a node becomes a relay only to assist other terminals, with our proposal a cooperator can also serve its own traffic. We evaluate Phoenix's performance by means of a theoretical model and extensive simulation campaigns. We show that Phoenix is especially beneficial in multihop settings and interesting gains over benchmark protocols can be achieved.