Downlink Scheduling and Radio Resource Allocation in Adaptive OFDMA Wireless Communication Systems for User-Individual QoS

Authors: Lu Yanhui, Wang Chunming, Yin Changchuan, Yue Guangxin

Abstract:

In this paper, we address the problem of adaptive radio resource allocation (RRA) and packet scheduling in the downlink of a cellular OFDMA system, and propose a downlink multi-carrier proportional fair (MPF) scheduler and its joint with adaptive RRA algorithm to distribute radio resources among multiple users according to their individual QoS requirements. The allocation and scheduling objective is to maximize the total throughput, while at the same time maintaining the fairness among users. The simulation results demonstrate that the methods presented provide for user more explicit fairness relative to RRA algorithm, but the joint scheme achieves the higher sum-rate capacity with flexible parameters setting compared with MPF scheduler.

Keywords: OFDMA, adaptive radio resource allocation, scheduling, QoS.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1057825

References:

[1] R.Berezdivin, R.Breinig, and R.Topp, "Next-generation wireless communications concepts and technologies," IEEE Commun. Mag., Vol.40, pp.108-116, Mar.2002
[2] Ying Jun Zhang, K.B.Letaief, "Multiuser Adaptive Subcarrier-and-Bit Allocation With Adaptive Cell Selection for OFDM Systems," IEEE Transactions on Wireless Communications, Vol.3, No.5, Sept.2004
[3] M.Ergen, S.Coleri and P.Varaiya, "QoS Aware Adaptive Resource Allocation Techniques for Fair Scheduling in OFDMA Based Broadband Wireless Access Systems," IEEE Transactions on Broadcasting, Vol.49, No.4, pp.362-370, Dec.2003
[4] Zukang Shen, "Multiuser OFDM Capacity Analysis with Partial Channel Information," Multiuser Wireless Communications Course Project, Fall 2002
[5] Dapeng Wu and Rohit Negi, "Downlink Scheduling in a Celluar Network for Quality of Service Assurance," IEEE Transactions on Vehicular Technology, Vol.53, No.5, pp.1547-1557, Sept.2004
[6] Hoon Kim and Youngnam Han, "A Proportional Fair Scheduling for Multicarrier Transmission Systems," IEEE Commun. Letters, Vol.9, No.3, pp.210-212, March 2005.
[7] P.Bender, P.Black, M.Grob, et al. "CDMA/HDR: A Bandwidth Efficient High Speed Data Service for Nomadic Users," IEEE Commun. Mag., Vol.38, pp.70-77, July 2000
[8] S.T.Chung and A.J.Goldsmith, "Degrees of Freedom in Adaptive Modulation: A Unified View," IEEE Trans. Commun., Vol.49, PP.1561-1571, Sept.2001
[9] A.J.Goldsmith and P.Varaiya, "Capacity of Fading Channels with Channel Side Information," IEEE Trans. Inform. Theory, Vol.43, pp.1986-1992, Nov.1997
[10] J.G. Proakis, Digital Communication, 3rd ed. New York: McGraw-Hill, 1995.