On the Performance of Multiuser Diversity under Explicit Quality of Service Constraints over Fading Channels

Shiping DUAN  Youyun XU  Wentao SONG  

IEICE TRANSACTIONS on Communications   Vol.E87-B   No.5   pp.1290-1296
Publication Date: 2004/05/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technology
multiuser diversity,  multiuser information theory,  wireless scheduling,  Quality of Service,  dynamic resource allocation,  

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Multiuser diversity, identified by recent information theoretic results, is a form of diversity inherent in a wireless network. The diversity gain is obtained from independent time-varying fading channels across different users. The main practical issue in multiuser diversity is lack of Quality of Service (QoS) guarantees. This study proposes a wireless scheduling algorithm named MUDSEQ for downlink channels exploiting multiuser diversity under explicit QoS constraints. The numerical results demonstrate that the novel algorithm can yield non-negligible diversity gain even under tight QoS constraints and little scattering or slow fading environments. Additionally, a system framework for dynamic resource allocation based on the proposed algorithm is developed.