A Power Control Scheme to Exploit Capture Effect with Fairness Consideration in WLAN

Szu Lin Su, Tsung Hsiu Chih, Yuan Chun Tsai, Hsieh Cheng Liao, Yu Chia Wang

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we develop a physical/medium-access-control cross layer design to improve system throughput with the consideration of fairness for IEEE 802.11 WLAN. From PHY layer perspective, when an access collision occurs, the access point can still decode the corresponding data successfully if the received signal to interference plus noise ratio is larger than the threshold. This phenomenon is referred to as the capture effect. To improve system throughput, this work proposes a Differential Reception-Power Power Control scheme to take advantage of the capture effect. However, the proposed power control scheme cannot provide a fair transmission environment even though it improves the system throughput. To resolve this problem, this work proposes two methods: the adjustment of contention window size and the modification of probability mass function for the selection of the backoff value. The simulation results demonstrate that the proposed schemes can not only remarkably improve system throughput, but also provide a fair transmission environment.

Original languageEnglish
Pages (from-to)3485-3500
Number of pages16
JournalWireless Personal Communications
Volume118
Issue number4
DOIs
Publication statusPublished - 2021 Jun

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering

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