A Generalization of Transmission Power Optimization Method for Concurrently Communicating Multiple Access-Points in Wireless Local-Area Network

Hendy Briantoro, Nobuo Funabiki, Kwenga Ismael Munene, Md Mahbubur Rahman, Fatema Akhter, Wen Chung Kao, Minoru Kuribayashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Nowadays, the IEEE 802.11n wireless local-area network (WLAN) has been extensively deployed around the world due to affordability, accessibility and expandability. As a result, a lot of access-points (APs) are closely allocated, which may cause radio interferences and degrade network performances. To solve this problem, we have studied the transmission power optimization method for concurrently communicating APs in WLAN. Either the maximum or minimum power is selected for each AP such that it gives the largest signal-to-noise ratio (SNR) of the receiving signal strength (RSS) through exhaustive measurements for the possible combinations. However, this method limits only two APs. In this paper, we present a generalization of this method for handling any number of APs in dense WLAN. To reduce SNR measurements, it sequentially selects the AP to the minimum power in descending order of the initial RSS where every AP has the maximum power. For evaluations, we conduct extensive experiments under various network topologies using Raspberry Pi for up to four APs. The results consistently show that the proposal can select the best transmission power combination for the APs, except for the cases where multiple APs are allocated in a small room. The improvements will be in future studies.

Original languageEnglish
Title of host publicationProceedings - 2020 8th International Symposium on Computing and Networking Workshops, CANDARW 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-7
Number of pages7
ISBN (Electronic)9781728199191
DOIs
Publication statusPublished - 2020 Nov
Event8th International Symposium on Computing and Networking Workshops, CANDARW 2020 - Virtual, Naha, Japan
Duration: 2020 Nov 242020 Nov 27

Publication series

NameProceedings - 2020 8th International Symposium on Computing and Networking Workshops, CANDARW 2020

Conference

Conference8th International Symposium on Computing and Networking Workshops, CANDARW 2020
CountryJapan
CityVirtual, Naha
Period2020/11/242020/11/27

Keywords

  • access point
  • multiple APs
  • Raspberry Pi
  • SNR
  • transmission power optimization
  • WLAN

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Hardware and Architecture
  • Computational Mathematics
  • Control and Optimization

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