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Joint scheduling and mapping in support of downlink fairness and spectral efficiency in ieee 802.16e OFDMA system
Author(s) -
Thanh Nguyen Huu,
Tung Doan Van,
Thu Ngo Quynh,
Nam Nguyen Canh,
Sandrasegaran Kumbesan
Publication year - 2016
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.3137
Subject(s) - computer science , wimax , orthogonal frequency division multiple access , wireless broadband , spectral efficiency , quality of service , computer network , telecommunications link , scheduling (production processes) , broadband , orthogonal frequency division multiplexing , wireless , wireless network , real time computing , telecommunications , mathematical optimization , channel (broadcasting) , mathematics
Summary The next generation broadband wireless networks deploy orthogonal frequency division multiple access (OFDMA) as the enabling technologies for broadband data transmission with QoS capabilities. In such broadband wireless systems, one major issue is how to utilize radio resource efficiently while maintaining fairness between sessions as well as providing adequate QoS. In this work, we propose an approach for OFDMA/time division duplex (TDD) downlink suitable for IEEE802.16e WiMAX systems that combines scheduling and burst mapping algorithms for a trade‐off between session fairness, QoS, and spectral efficiency. While optimizing radio resources under QoS and fairness constraints is an NP ‐hard problem, we follow a heuristic approach that simplifies the complexity of the algorithm. Performance results show that while the new scheme outperforms the Proportional Fair algorithm in terms of fairness, it also improves the overall system spectral efficiency. Copyright © 2016 John Wiley & Sons, Ltd.