Show simple item record Niyato, D Hossain, E 2007-10-04T12:34:15Z 2007-10-04T12:34:15Z 2006-11-30T12:34:15Z
dc.identifier.citation 0018-9545; IEEE TRANS VEH TECHNOL, NOV 2006, vol. 55, no. 6, p.1897 to 1907. en
dc.description.abstract This paper presents a semi-analytical methodology for radio link level performance analysis in a multirate "orthogonal frequency-division multiple-access" (OFDMA) network with adaptive fair rate allocation. Multirate transmission is assumed to be achieved through adaptive modulation, and fair rate allocation-is based on the principle of generalized processor sharing to allocate the subcarriers adaptively among the users. The fair rate allocation problem is formulated as an optimization problem with the objective of maximizing system throughput while maintaining fairness (in terms of transmission rate) among the users. The "optimal" fair rate allocation is obtained by using the "Hungarian method." A heuristic-based approach, namely the "iterative approach," that is more implementation friendly is also presented. The throughput performance of the iterative fair rate allocation is observed to be as good as that of optimal fair rate allocation and is better than that of the static subcarrier allocation scheme. Also, the iterative fair allocation provides better fairness compared to that for each of the optimal and the static subcarrier allocation schemes. To this end, a queuing model is formulated to analyze radio link level performance measures such as packet dropping probability and packet transmission delay under the above rate allocation schemes. In this formulation, packet arrivals are modeled by the discrete Markov modulated Poisson process, which is flexible to model different types of traffic arrival patterns. The proposed framework for radio link level performance analysis of multirate OFDMA networks is validated by extensive simulations. Also, examples on the application of the proposed model for connection admission control and quality-of-service provisioning are illustrated. en
dc.format.extent 900258 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.rights ©2006 IEEE. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Manitoba's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it. en
dc.rights info:eu-repo/semantics/restrictedAccess
dc.subject adaptive fair subcarrier allocation en
dc.subject adaptive modulation (AM) en
dc.subject orthogonal frequency-division multiple access (OFDMA) en
dc.subject queuing analysis en
dc.subject SYSTEMS en
dc.subject MODULATION en
dc.subject CHANNEL en
dc.subject ACCESS en
dc.title Adaptive fair subcarrier/rate allocation in multirate OFDMA networks: Radio link level queuing performance analysis en
dc.status Peer reviewed en

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