American Institute of Mathematical Sciences

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July  2009, 5(3): 553-567. doi: 10.3934/jimo.2009.5.553

Feedback limited opportunistic scheduling and admission control for ergodic rate guarantees over Nakagami-$m$ fading channels

Yoora Kim 1, , Gang Uk Hwang 2, and  Hea Sook Park 3,

1. 

School of Electrical Engineering and Computer Science, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea
2. 

Department of Mathematical Sciences and Telecommunication Engineering Program, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, South Korea
3. 

Network Research Department, Electronics and Telecommunications Research Institute, Daejeon 305-700, South Korea

Received  August 2008 Revised  April 2009 Published  June 2009

In this paper, we consider downlink transmission in a cellular wireless network, where a base station communicates with multiple mobile stations~(MSs) over Nakagami-$m$ fading channels. MSs are classified into two classes, and each class has its own minimum ergodic rate requirement. We propose an opportunistic scheduling and admission control scheme that aims at guaranteeing minimum ergodic rates for all MSs in the network. In order to maintain fairness among MSs in the same class and reduce the feedback load on the uplink of the network, our proposed scheme uses normalized SNR thresholds and exploits multiuser diversity with limited feedback. In our analysis, we give a formula by which we can easily check whether an incoming MS, who requests to join a class in the network, can be accepted or not. For accepted MSs in the network, we obtain the values of thresholds with which all MSs in the network can be guaranteed respective minimum ergodic rate requirements. Through numerical studies and simulations, we confirm the validity of our scheme and analysis, and show the usefulness of our scheme.
Keywords: opportunistic scheduling., ergodic rate guarantee, multiuser diversity, Admission control, Nakagami-$m$ fading, feedback reduction, normalized SNR threshold.
Mathematics Subject Classification: Primary: 90B18; Secondary: 90B3.
Citation: Yoora Kim, Gang Uk Hwang, Hea Sook Park. Feedback limited opportunistic scheduling and admission control for ergodic rate guarantees over Nakagami-$m$ fading channels. Journal of Industrial & Management Optimization, 2009, 5 (3) : 553-567. doi: 10.3934/jimo.2009.5.553
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