Trigger-based approach with hidden node problem for uplink multi-user transmission in 802.11ax

Sok Ian Sou, Yinman Lee

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

2 Citations (Scopus)

Abstract

To enable uplink (UL) multi-user (MU) transmission in 802.11ax, the Access Point (AP) sends a Trigger Frame to schedule stations (STAs) to send their UL data, and uses the new MU Request to Send (RTS) mechanism to protect large MU transmissions from hidden nodes. This paper addresses the potential problem of having one or more solicited STAs with nonzero Network Allocation Vector (NAV). This would reduce the system efficiency as some allocated resources will not be exploited for the reserved uplink transmission period. Accordingly, this paper proposes a variant of the Trigger operation considering the employment of massive multiple input and multiple output (MIMO) on the AP side, designated as Massive MU RTS (MMU-RTS) mechanism. In the proposed mechanism, some backup STAs not included on the trigger list, but having zero NAV are permitted to respond to the AP together with the solicited STAs. In particular, two user selection algorithms are proposed for the MMU-RTS mechanism. The efficiency of the proposed method is demonstrated through extensive numerical simulations.

Original languageEnglish
Title of host publication18th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-5
Number of pages5
ISBN (Electronic)9781509030088
DOIs
Publication statusPublished - 2017 Dec 19
Event18th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2017 - Sapporo, Japan
Duration: 2017 Jul 32017 Jul 6

Publication series

NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
Volume2017-July

Other

Other18th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2017
CountryJapan
CitySapporo
Period17-07-0317-07-06

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Information Systems

Cite this

Sou, S. I., & Lee, Y. (2017). Trigger-based approach with hidden node problem for uplink multi-user transmission in 802.11ax. In 18th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2017 (pp. 1-5). [8227708] (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC; Vol. 2017-July). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SPAWC.2017.8227708