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Multiuser scheduling in high speed downlink packet access

  • Raymond Kwan
    ,
  • Mehmet Emin Aydin
    ,
  • Cyril Leung
    ,
  • J. Zhang
Research Output: Contribution to journal Article Peer-review

Abstract

Multiuser scheduling is an important aspect in the performance optimisation of a wireless network as it allows multiple users to efficiently access a shared channel by exploiting multiuser diversity. For example, the 3GPP cellular standard supports multiuser scheduling in the high speed downlink packet access (HSDPA) feature. To perform efficient scheduling, channel state information (CSI) for users is required, and is obtained via their respective feedback channels. Multiuser scheduling is studied assuming the availability of perfect CSI, which would require a high bandwidth overhead. A more realistic imperfect CSI feedback in the form of a finite set of channel quality indicator values is assumed, as specified in the HSDPA standard. A global optimal approach and a simulated annealing (CSA) approach are used to solve the optimisation problem. Simulation results suggest that the performances of the two approaches are very close even though the complexity of the simulated annealing (SA) approach is much lower. The performance of a simple greedy approach is found to be significantly worse.

Publication Information

Output type

Research Output: Contribution to journal Article Peer-review

Original language

English

Pages from-to (Number of pages)

Pages 1363-1367

Journal (Volume, Issue Number)

IET Communications (Volume 3, Issue 8)

Publication milestones

  • Published - 01/08/2009

Publication status

Published - 01/08/2009

ISSN

1751-8628

External Publication IDs

  • handle.net: 10547/225295
  • Scopus: 67651222338

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