A study on the downlink channel quality feedback control algorithm and scheduling algorithm

Zhang Xin; Yang Dacheng

Volume 25 Issue 4

Apr. 2003

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Article Navigation > Journal of Electronics & Information Technology > 2003 > 25(4): 567-572

Zhang Xin, Yang Dacheng. A study on the downlink channel quality feedback control algorithm and scheduling algorithm[J]. Journal of Electronics & Information Technology, 2003, 25(4): 567-572.

Citation:

Zhang Xin, Yang Dacheng. A study on the downlink channel quality feedback control algorithm and scheduling algorithm[J]. Journal of Electronics & Information Technology, 2003, 25(4): 567-572.

Zhang Xin, Yang Dacheng. A study on the downlink channel quality feedback control algorithm and scheduling algorithm[J]. Journal of Electronics & Information Technology, 2003, 25(4): 567-572.

Citation:

Zhang Xin, Yang Dacheng. A study on the downlink channel quality feedback control algorithm and scheduling algorithm[J]. Journal of Electronics & Information Technology, 2003, 25(4): 567-572.

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A study on the downlink channel quality feedback control algorithm and scheduling algorithm

Received Date: 2001-10-22
Rev Recd Date: 2002-07-11
Publish Date: 2003-04-19

Abstract

Abstract

At first, in this paper, the feedback mechanisms of downlink channel quality for cdma2000 IxEV-DO/DV, a 3G technical proposal, are described briefly. Then a new feedback control algorithm is presented and integrated with proportional fair scheduling algorithm. The modified scheduling algorithm is studied by analysis and simulation. It is shown that this new algorithm can bring some significant improvements over the ordinary scheduler without feedback control in terms of system throughput, leaving no harm on fairness. In addition, the new algorithm will be helpful to reduce the power consumption of mobile terminals. The fundamental strategy underlying this new algorithm will be useful to other application fields where shared resources are needed to be scheduled.

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References(1)

References

3GPP2, Physical Layer Standard for cdma2000 Spread Spectrum Systems, C. S0002-A, Version5.0.[2]3GPP2, cdma2000 High Rate Packet Data Air Interface Specification, C. S0024, Version 2.0. ［3］LG, LSI, Lucent, Qualcomm, and Samsung (L3QS), Updated Joint Physical Layer Proposal for 1xEV-DV, contribution 3GPP2-C50-20010611-009-L3QS-Updated-PL-Text.[3]A. Jalali, R. Padovani, R. Pankaj, Data throughput of CDMA-HDR, a high efficiency data rate personal communication wireless system, Proc. VTC2000-Spring, Tokyo, May, 2000, 1854-1858.J.M. Holtzman, CDMA forward link watertilling power control Proc. VTC2000-Spring, Tokyo,May, 2000, 1663-1667.[4]T.S. Rappaport, Wireless Communications Principles and Practice, New Jersey, Prentice Hall,Inc., 1996, 172-174.[5]A.J. Viterbi, CDMA: Principlcs of Spread Spectrum Conmunication Massachusetts, AddisonWesley Publish Company, 1995, 178-182.[6]3GPP2, 1xEV-DV Evaluation Methodology Addendum (V4), C50-20010709-021R1-1xEV-DV-Evaluation-Methodology-Addendun- V4.[7]事实上闭环功率控制也需要反馈,所不同的是它应用于速率基本恒定的信道,本文不对此重点研究.[8]与1xEV-DO不同,1xEV-DV中下行采用的是时间连续的码分导频.

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