Adaptively pairwise network coding in multi-session wireless relay networks

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Relay-assisted network coding (NC) has attracted recent interests in increasing the transmission reliability and network throughput. By encoding the received packets from different source nodes, a relay node assists destinations to recover their desired information by forwarding the network coded packets. Previous work commonly assumes reliable inter-node channels and that relays always encode all the received packets to leverage the potential diversity and multiplexing gains. When channels are unreliable and unstable, for example, due to fading and propagation loss, the achievable benefit of NC diminishes and thus the traditional NC (namely, all received packets are encoded) becomes unsuitable for wireless networks. In this paper, a NC scheme is proposed, where multiple relays assist multiple source-destination pairs by adaptively performing selective decode-and-forward, NC, or remaining silent. When NC is possible, the relay always encode a pair of packets, selected according to the channel condition of the relay-destination link. Important performance metrics of the proposed scheme, including the average system outage probability and average goodput, are derived in closed form for independent and nonidentically distributed (i.n.i.d) slow Rayleigh fading channels. Numerical results show that the proposed scheme significantly reduces the system outage probability and improves the goodput of the relay-assisted wireless networks.

Original languageEnglish
Title of host publication2011 IEEE Wireless Communications and Networking Conference, WCNC 2011
Pages880-884
Number of pages5
DOIs
Publication statusPublished - 2011 Jun 23
Event2011 IEEE Wireless Communications and Networking Conference, WCNC 2011 - Cancun, Mexico
Duration: 2011 Mar 282011 Mar 31

Publication series

Name2011 IEEE Wireless Communications and Networking Conference, WCNC 2011

Other

Other2011 IEEE Wireless Communications and Networking Conference, WCNC 2011
CountryMexico
CityCancun
Period11-03-2811-03-31

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Communication

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  • Cite this

    Liu, K. H. (2011). Adaptively pairwise network coding in multi-session wireless relay networks. In 2011 IEEE Wireless Communications and Networking Conference, WCNC 2011 (pp. 880-884). [5779248] (2011 IEEE Wireless Communications and Networking Conference, WCNC 2011). https://doi.org/10.1109/WCNC.2011.5779248