An OFDMA based concurrent multiuser MAC for upcoming IEEE 802.11ax

Qiao Qu, Bo Li, Mao Yang, Zhongjiang Yan

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

58 Scopus citations

Abstract

Recently, IEEE drew up a new task group named TGax to draft out the standard IEEE 802.11ax for next generation WLANs. However, the average throughput is very low due to the current medium access control (MAC) protocol. A promising solution for this problem is to draw Orthogonal Frequency Division Multiple Access (OFDMA) into IEEE 802.11ax to enable multiuser access. The key challenges of adopting OFDMA are synchronization and overhead reduction. In this paper, we propose an OFDMA based Multiple Access for IEEE 802.11ax (OMAX) protocol to solve both two challenges above. The whole channel physical channel sensing and fast backoff are adopted to ensure synchronization, while enhanced RTS/CTS mechanism and new frame structure are designed to reduce overhead. Moreover, the mathematic model of OMAX is formulated, and the performance of OMAX is analyzed. The analysis and simulation result indicate that the proposed OMAX protocol increases the throughput to 160%.

Original languageEnglish
Title of host publication2015 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages136-141
Number of pages6
ISBN (Electronic)9781479987603
DOIs
StatePublished - 11 Jun 2015
Event2015 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2015 - New Orleans, United States
Duration: 9 Mar 201512 Mar 2015

Publication series

Name2015 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2015

Conference

Conference2015 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2015
Country/TerritoryUnited States
CityNew Orleans
Period9/03/1512/03/15

Keywords

  • IEEE 802.11ax
  • MAC
  • Next generation WLANs
  • OFDMA

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