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Network-level performance evaluation of a two-relay cooperative random access wireless system
Ericsson, Sweden.
Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
University of Crete, Greece.
Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
2015 (English)In: Computer Networks, ISSN 1389-1286, E-ISSN 1872-7069, Vol. 88, 187-201 p.Article in journal (Refereed) Published
Abstract [en]

In wireless networks relay nodes can be used to assist the users transmissions to reach their destination. Work on relay cooperation, from a physical layer perspective, has up to now yielded well-known results. This paper takes a different stance focusing on network-level cooperation. Extending previous results for a single relay, we investigate here the benefits from the deployment of a second one. We assume that the two relays do not generate packets of their own and the system employs random access to the medium; we further consider slotted time and that the users have saturated queues. We obtain analytical expressions for the arrival and service rates of the queues of the two relays and the stability conditions. We investigate a model of the system, in which the users are divided into clusters, each being served by one relay, and show its advantages in terms of aggregate and throughput per user. We quantify the above, analytically for the case of the collision channel and through simulations for the case of multi-packet reception (MPR), and we provide insight on when the deployment of a second relay in the system can yield significant advantages.

Place, publisher, year, edition, pages
Elsevier , 2015. Vol. 88, 187-201 p.
Keyword [en]
Network-level cooperation; Relay; Random access
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:liu:diva-121297DOI: 10.1016/j.comnet.2015.06.012ISI: 000359890200014OAI: oai:DiVA.org:liu-121297DiVA: diva2:854354
Note

Funding Agencies|European Union [324515, 612361]

Available from: 2015-09-16 Created: 2015-09-14 Last updated: 2017-12-04

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Pappas, NikolaosAngelakis, Vangelis

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • Other style
More styles
Language
  • de-DE
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