Threshold-based opportunistic scheduling for ergodic rate guarantees in wireless networks

Authors:
Yoora Kim;Gang Uk Hwang
Affiliations:
Department of Mathematical Sciences and Telecommunication Engineering Program, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea;Department of Mathematical Sciences and Telecommunication Engineering Program, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
Venue:
IEEE Transactions on Wireless Communications
Year:
2009

Citing 3
Cited 1

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Rate-optimal multiuser scheduling with reduced feedback load and analysis of delay effects

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A Threshold-Based Channel State Feedback Algorithm for Modern Cellular Systems

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Mode selection-based channel feedback reduction schemes for opportunistic scheduling in OFDMA systems

IEEE Transactions on Wireless Communications

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Abstract

In this paper, we propose an opportunistic downlink scheduling scheme that exploits multiuser diversity in a wireless network with threshold-based limited feedback. We assume that each user has its own ergodic rate requirement. The design objective of our scheme is to determine the values of thresholds with which heterogeneous ergodic rate requirements of all users are satisfied. In our analysis, we present a formula to check the feasibility of given ergodic rate requirements, and then obtain the feasible thresholds that realize them. We also obtain the optimal thresholds that maximize the ergodic sum-rate of the network while guaranteeing the ergodic rate requirements. Through numerical studies and simulations, we show the usefulness of our scheme and analysis.