Queuing delay and buffer distribution of two-user opportunistic scheduling schemes in wireless networks

Md Jahangir Hossain, Mohamed Slim Alouini, Vijay K. Bhargava

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In our earlier works, we proposed rate adaptive modulation assisted two-user opportunistic scheduling schemes. The proposed schemes are innovative in the sense that they include second user in a transmission opportunistically using rate adaptive hierarchical modulations. As such the frequency of information access of the users increases without any degradation of the system link spectral efficiency (SE) compared to the classical opportunistic scheduling. In this paper, we analyze delay performance of our earlier proposed schemes. Specifically, using a queuing analytic model we derive queuing delay as well as buffer distributions of the packets that wait at the base station (BS) buffer for downlink (DL) transmission. Using this model, we compare performance of the two-user opportunistic scheduling schemes with that of the classical single user opportunistic schemes. These single user opportunistic scheduling schemes are the absolute carrier-to-noise ratio (CNR) based scheduling and normalized CNR based scheduling which is equivalent to the proportional fair scheduling (PFS). For an interdependent and identically distributed (i.i.d.) fading environment, our proposed scheme can improve delay performance significantly. Selected numerical results in an independent but non-identically distributed (i.n.d.) fading environment, our proposed scheme achieves overall good delay performance.

Original languageEnglish (US)
Title of host publicationICC 2008 - IEEE International Conference on Communications, Proceedings
Pages3694-3700
Number of pages7
DOIs
StatePublished - 2008
Externally publishedYes
EventIEEE International Conference on Communications, ICC 2008 - Beijing, China
Duration: May 19 2008May 23 2008

Other

OtherIEEE International Conference on Communications, ICC 2008
CountryChina
CityBeijing
Period05/19/0805/23/08

Keywords

  • Delay statistic
  • Hierarchical modulations
  • Multi-user diversity
  • Opportunistic scheduling
  • Queuing analysis

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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