NDLI: An enhanced proportional fair scheduling algorithm to maximize QoS traffic in downlink OFDMA systems

Content Provider	IEEE Xplore Digital Library
Author	I-Fen Chao Chuei-Sheng Chiou
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. Eng., Yuan Ze Univ., Chungli, Taiwan (I-Fen Chao; Chuei-Sheng Chiou)
Abstract	OFDMA-based networks have been considered to be a promising solution to wireless networks especially for broadband multimedia mobile services. In this paper, we propose an enhanced proportional fair (E-PF) scheduling algorithm, which aims at maximizing QoS throughput while still retaining fairness as well as maximizing system throughput in downlink OFDMA systems. Proportional fair (PF) has emerged as a prominent candidate in wireless networks because it achieves a good tradeoff between system throughput and fairness. Nevertheless, the equivalent airtime allocation scheme via PF leads to low throughput of bad channel users, and also limits the attainable QoS throughput of the entire system. E-PF is an enhanced PF-based utility function, which is expected to support QoS and provide a low-complexity algorithm for multi-channel OFDMA networks. We demonstrate via extensive simulation results, that E-PF outperforms PF in terms of system throughput and mean delay. Also, the results show that E-PF well accommodates nearly twice the amount of high priority data than PF does.
Starting Page	239
Ending Page	243
File Size	370756
Page Count	5
File Format	PDF
ISBN	9781467359382
ISSN	15253511
e-ISBN	9781467359399
e-ISBN	9781467359375
DOI	10.1109/WCNC.2013.6554570
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-04-07
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Throughput Quality of service Indexes Downlink Simulation Wireless networks Delays Quality of Service (QoS) Orthogonal Frequency Division Multiple Access (OFDMA) Proportional fairness (PF)
Content Type	Text
Resource Type	Article

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