Mobility-driven scheduling in wireless networks

S.C. Borst, N. Hegde, A. Proutière

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

22 Citaten (Scopus)
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Samenvatting

The design of scheduling policies for wireless data systems has been driven by a compromise between the objectives of high overall system throughput and the degree of fairness among users, while exploiting multi-user diversity, i.e., fast-fading variations. These policies have been thoroughly investigated in the absence of user mobility, i.e., without slow fading variations. In the present paper, we examine the impact of intra- and inter-cell user mobility on the trade-off between throughput and fairness, and on the suitable choice of a-fair scheduling policies. We consider a dynamic setting where users come and go over time as governed by random finite-size data transfers, and explicitly allow for users to roam around. It is demonstrated that the overall performance improves as the fairness parameter a is reduced, and in particular, that proportional fair scheduling may yield relatively poor performance, in sharp contrast to the standard scenario with only fast fading. Since a lower a tends to affect short-term fairness, we explore how to set the fairness parameter so as to strike the right balance between overall performance and short-term fairness. It is further established that mobility tends to improve the performance, even when the network operates under a local fair scheduling policy as opposed to a globally optimal strategy. We present extensive simulation results to confirm and illustrate the analytical findings.
Originele taal-2Engels
TitelProceedings 28th IEEE International Conference on Computer Communications (INFOCOM 2009, Rio de Janeiro, Brazil, April 19-25, 2009)
UitgeverijInstitute of Electrical and Electronics Engineers
Pagina's1260-1268
ISBN van geprinte versie978-1-4244-3512-8
DOI's
StatusGepubliceerd - 2009

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