Threshold-based parallel multiuser scheduling

Sung Sik Nam, Mohamed Slim Alouini, Hong Chuan Yang, Khalid A. Qaraqe

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


In this paper, we propose two new threshold based parallel multiuser scheduling schemes, namely (i) an on-off based scheduling (OOBS) scheme and (ii) a switched based scheduling (SBS) scheme. The objective is to reduce the complexity of implementation without a considerable performance loss in comparison with conventional selection based scheduling. While the OOBS scheme schedules all the users with an SNR above a fixed preselected signal to noise ratio (SNR) threshold, the SBS scheme schedules only the Ks users with an acceptable SNR if there are enough acceptable users. Otherwise, the scheduler selects the best Ks users. We analyze statistical characteristics and performances of these proposed schemes. Numerical results show that the proposed schemes can offer some decrease in the average feedback load without an important degradation in average bit error rate and average spectral efficiency.

Original languageEnglish (US)
Article number4907478
Pages (from-to)2150-2159
Number of pages10
JournalIEEE Transactions on Wireless Communications
Issue number4
StatePublished - Apr 2009
Externally publishedYes


  • Adaptive modulation
  • Diversity techniques
  • Feedback
  • Multiuser scheduling
  • Spectral efficiency

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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