Performance analysis of scheduling and interference coordination policies for OFDMA networks

Authors:
Gábor Fodor;Miklós Telek;Chrysostomos Koutsimanis
Affiliations:
Ericsson Research, SE-164 80 Stockholm, Sweden;Budapest University of Technology and Economics, H-1111 Budapest, Hungary;Ericsson Research, SE-164 80 Stockholm, Sweden
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking
Year:
2008

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Abstract

In orthogonal frequency division multiple access systems there is an intimate relationship between the packet scheduler and the inter-cell interference coordination (ICIC) functionalities: they determine the set of frequency channels (sub-carriers) that are used to carry the packets of in-progress sessions. In this paper we build on previous work - in which we compared the so called random and coordinated ICIC policies - and analyze three packet scheduling methods. The performance measures of interest are the session blocking probabilities and the overall throughput. We find that the performance of the so-called Fifty-Fifty and What-It-Wants scheduling policies is somewhat improved by coordinated sub-carrier allocation, especially in poor signal-to-noise-and-interference situations and at medium traffic load values. The performance of the All-Or-Nothing scheduler is practically insensitive to the choice of the sub-carrier allocation policy.