Scheduling algorithms with error rate consideration in HSDPA networks

ABSTRACT

The probability of transmission failure under a given wireless condition and instantaneous transmission rate is introduced as a new scheduling metric to improve the performance of existing scheduling algorithms. Scheduling algorithms for high-speed downlink packet access (HSDPA) in wideband code division multiple access (WCDMA) networks generally deal with the instantaneous transmission rate of each user as a key parameter reflecting the time-varying and locationdependent characteristics of the wireless channel. As a more detailed measure of the wireless condition of each user, the error rate metric improves the effectiveness of sharing resources without sacrificing a good balance between system performance and user fairness. Simulation results demonstrate that a performance gain of approximately 20% can be achieved for several well-known scheduling algorithms when the error rate is taken into account.

References

1. P. Bender, P. Black, M. Grob, R. Padovani, N. Sindhushayana, and A. Viterbi. CDMA/HDR: A bandwidth efficient high-speed wireless data service for nomadic users. IEEE Communications Magazine, 38(7):70--77, July 2000.
2. F. Berggren and R. Jantti. Multiuser scheduling over rayleigh fading channels. In Proc. IEEE Globecom 2003, December 2003.
3. T. Bonald, S. C. Borst, and A. Proutière. Inter-cell scheduling in wireless data networks. In Proc. European Wireless Conference 2005, April 2005.
4. Y.-J. Choi, S. Bahk, and K. B. Lee. WAF: wireless-adaptive fair scheduling for multimedia stream. Electronics Letters, 39(14):1093--1094, July 2003.
5. M. Hu, J. Zhang, and J. Sadowsky. Traffic aided opportunistic scheduling for downlink transmissions: Algorithms and performance bounds. In Proc. IEEE Infocom 2004, March 2004.
6. F. Kelly. Charging and rate control for elastic traffic. European transactions on telecommunications, 8:33--37, 1997.
7. X. Liu, E. Chong, and N. Shroff. Af ramework for opportunistic scheduling in wireless networks. Computer Networks Journal, 41(4):451--474, 2003.
8. Y. Ohta, M. Tsuru, and Y. Oie. Fairness property and TCP-level performance of unified scheduling algorithm in HSDPAn etworks. In 3rd European Conference on Universal Multiservice Networks, pages 185--195, October 2004.
9. Z. Zhang, Y. He, and E. K. P. Chong. Opportunistic downlink. scheduling for multiuser OFDM systems. In Proc. 2005 IEEE Wireless Communications and Networking Conference, pages 13--17, March 2005.

Index Terms

• Networks

  • Network architectures