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| A study on the downlink channel quality feedback control algorithm and scheduling algorithm |
| Zhang Xin; Yang Dacheng |
| PO Box 93, Beijing University of Posts and Telecommunications Beijing 100876 China |
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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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Received: 22 October 2001
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2003, Vol. 25 
