Optimizing the radio resource utilization of multiaccess systems with a traffic-transmission quality adaptive packet scheduling

Authors:
Andrea Baiocchi;Francesca Cuomo;Cristina Martello
Affiliations:
Department of INFOCOM, University of Rome "La Sapienza", via Eudossiana, Rome, Italy;Department of INFOCOM, University of Rome "La Sapienza", via Eudossiana, Rome, Italy;Department of INFOCOM, University of Rome "La Sapienza", via Eudossiana, Rome, Italy
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking
Year:
2002

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Abstract

In this paper we state a general framework for radio resource allocation based on a matrix which highlights the trade-offs of complexity and efficiency. This framework is outlined for the systematic definition of scheduling algorithms that are jointly adaptive to traffic and to transmission quality in order to improve the radio resource utilization and the achievable throughput of cellular networks for the support of best-effort traffic. We consider the application of the matrix concept to both time division and code division multiple access, the latter scheme also bringing about mutual interference among competing users. Then we propose a scheduling algorithm for wireless systems, called channel adaptive open scheduling (CHAOS). The CHAOS performance in terms of throughput and delay is extensively compared with those resulting from a load adaptive channel independent scheduling (CIS). A major result of this work is the quantitative assessment of the performance advantage allowed by jointly accounting for traffic congestion and transmission quality. Moreover the main implementation issues related to the proposed algorithms are investigated.