Multiuser switched diversity scheduling schemes

Mohammad Shaqfeh, Hussein Alnuweiri, Mohamed Slim Alouini

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Multiuser switched-diversity scheduling schemes were recently proposed in order to overcome the heavy feedback requirements of conventional opportunistic scheduling schemes by applying a threshold-based, distributed, and ordered scheduling mechanism. The main idea behind these schemes is that slight reduction in the prospected multiuser diversity gains is an acceptable trade-off for great savings in terms of required channel-state-information feedback messages. In this work, we characterize the achievable rate region of multiuser switched diversity systems and compare it with the rate region of full feedback multiuser diversity systems. We propose also a novel proportional fair multiuser switched-based scheduling scheme and we demonstrate that it can be optimized using a practical and distributed method to obtain the feedback thresholds. We finally demonstrate by numerical examples that switched-diversity scheduling schemes operate within 0.3 bits/sec/Hz from the ultimate network capacity of full feedback systems in Rayleigh fading conditions.

Original languageEnglish
Article number6226900
Pages (from-to)2499-2510
Number of pages12
JournalIEEE Transactions on Communications
Volume60
Issue number9
DOIs
Publication statusPublished - 3 Jul 2012

    Fingerprint

Keywords

  • Opportunistic scheduling
  • achievable rate region
  • multiuser switched diversity
  • proportional fairness
  • reduced feedback

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this