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Reduced feedback for capacity and fairness tradeoff in multiuser diversity

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2 Author(s)
Kim, T. ; Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea ; Lim, J.-T.

The network capacity of wireless systems can be increased drastically by extracting multiuser diversity gain. The multiuser diversity gain is obtained by granting scheduling priority to the mobile station (MS) with the best current channel condition. There are a couple of drawbacks in multiuser diversity schedulers such as the linearly increasing feedback load with the number of MSs and the degrading fairness. To balance the capacity request against the fairness request, the authors need a scheduler achieving capacity and fairness tradeoff. In this study, the authors propose a new scheduling scheme of selecting a single MS, which can achieve the trade-off between capacity and fairness with reduced feedback. The simulation result shows that the proposed scheduling scheme attains better fairness compared with the conventional method for achieving capacity and fairness trade-off.

Published in:

Communications, IET  (Volume:5 ,  Issue: 7 )

Date of Publication:

May 4 2011

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