Can one achieve multiuser diversity in uplink multi-cell networks?

Won Yong Shin, Dohyung Park, Bang Chul Jung

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We introduce a distributed opportunistic scheduling (DOS) strategy, based on two pre-determined thresholds, for uplink K-cell networks with time-invariant channel coefficients. Each base station (BS) opportunistically selects a mobile station (MS) who has a large signal strength of the desired channel link among a set of MSs generating a sufficiently small interference to other BSs. Then, performance on the achievable throughput scaling law is analyzed. As our main result, it is shown that the achievable sum-rate scales as Klog(SNRlog N) in a high signal-to-noise ratio (SNR) regime, if the total number of users in a cell, N, scales faster than SNRK-1/1-ε for a constant ε(0,1). This result indicates that the proposed scheme achieves the multiuser diversity gain as well as the degrees-of-freedom gain even under multi-cell environments. Simulation results show that the DOS provides a better sum-rate throughput over conventional schemes.

Original languageEnglish
Article number6302112
Pages (from-to)3535-3540
Number of pages6
JournalIEEE Transactions on Communications
Volume60
Issue number12
DOIs
Publication statusPublished - 2012 Sep 21

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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