Relay-assisted Network Coding Multicast in the Presence of Neighbours
Konferenz: European Wireless 2015 - 21th European Wireless Conference
20.05.2015 - 22.05.2015 in Budapest, Hungary
Tagungsband: European Wireless 2015
Seiten: 7Sprache: EnglischTyp: PDF
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Autoren:
Khamfroush, Hana (Department of Computer Science, Pennsylvania State University, USA)
Lucani, Daniel E.; Pahlevani, Peyman (Department of Electronic Systems, Aalborg University, Denmark)
Fitzek, Frank H. P. (Technical University of Dresden, Dresden, Germany)
Barros, Joao (Instituto de Telecomunicaçoes, University of Porto, Portugal)
Inhalt:
We study the problem of minimizing the cost of packet transmission from a source to two receivers with the help of a relay and using network coding in wireless mesh networks consisting of many active neighbours sharing the same channel. The cost minimization problem is modelled as a Markov Decision Process (MDP) and analysed under different network conditions. Two simple heuristics are proposed to estimate the appropriate time for activating the relay to provide close-tooptimal performance. Our numerical results show that a judicious network coding enabled relay can bring up to 2.9x gains in the presence of active neighbours compared to multicasting directly from the source. We further show that in scenarios which the links between relay and destinations are not better than the links between source and destinations, a relay can still provide up to 1.7x gain.