Kong, Z. and Kwok, Y.K. and Wang, J. (2009) A Low-Complexity QoS-Aware Proportional Fair Multicarrier Scheduling Algorithm for OFDM Systems. IEEE Transactions on Vehicular Technology, 58 (5). pp. 2225-2235. ISSN 0018-9545 .
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Orthogonal frequency-division multiplexing (OFDM) systems are the major cellular platforms for supporting ubiquitous high-speed mobile applications. However, a number of research challenges remain to be tackled. One of the most important challenges is the design of a judiciousl packet scheduler that will make efficient use of the spectrum bandwidth. Due to the multicarrier nature of the OFDM systems, the applicability and performance of traditional wireless packet-scheduling algorithms, which are usually designed for single-carrier systems, are largely unknown. In this paper, we propose a new quality-of-service (QoS)-aware proportional fairness (QPF) packet-scheduling policy with low complexity for the downlink of multiuser OFDM systems to allocate radio resources among users. Our proposed algorithm is based on a cross-layer design in that the scheduler is aware of both the channel (i.e. physical layer)and the queue state (i.e. data link layer) information to achieve proportional fairness while maximising each user's packet-level QoS performance. The simulation results show that the proposed QPF algorithm is efficient in terms of average system throughput, packet-dropping probability, and packet delay, while maintaining adequate fairness among users with relatively low scheduling overhead.
|Uncontrolled keywords:||Cross-layer design, orthogonal frequency-division multiplexing (OFDM) systems, packet scheduling, proportional fairness (PF), quality of service (QoS)|
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunications > TK5103.4 Broadband (inc wireless broadband)|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts > Broadband & Wireless Communications|
|Depositing User:||Jenny Harries|
|Date Deposited:||20 Nov 2009 11:28|
|Last Modified:||20 Nov 2009 11:28|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/23414 (The current URI for this page, for reference purposes)|
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