MU-MIMO enabled uplink OFDMA MAC protocol in dense IEEE 802.11ax WLANs

Sohyun Joo; Taeyoon Kim; Taewon Song; Sangheon Pack

doi:10.1016/j.icte.2020.04.007

MU-MIMO enabled uplink OFDMA MAC protocol in dense IEEE 802.11ax WLANs

Sohyun Joo, Taeyoon Kim, Taewon Song, Sangheon Pack

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

IEEE 802.11ax supports orthogonal frequency division multiple access (OFDMA) for uplink (UL) transmissions where stations (STAs) access randomly chosen resource units (RUs) in a distributed manner. Nevertheless, as the number of STAs increases, frequent collisions can occur, which lead to throughput degradation in UL transmissions. To address this problem, we propose a multi-user multiple-input multiple-output (MU-MIMO) enabled UL OFDMA random access (MORA) protocol. MORA combines the ideas of OFDMA and MU-MIMO, and thus more than one STA can share the same RU, which can significantly reduce the collision probability in congested situations. Analytical and simulation results demonstrate that MORA improves the throughput of the standard OFDMA-only protocol significantly.

Original language	English
Pages (from-to)	287-290
Number of pages	4
Journal	ICT Express
Volume	6
Issue number	4
DOIs	https://doi.org/10.1016/j.icte.2020.04.007
Publication status	Published - 2020 Dec

Bibliographical note

Publisher Copyright:
© 2020 The Korean Institute of Communications and Information Sciences (KICS)

Keywords

IEEE 802.11ax
MORA
MU-MIMO
OFDMA

ASJC Scopus subject areas

Software
Information Systems
Hardware and Architecture
Computer Networks and Communications
Artificial Intelligence

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10.1016/j.icte.2020.04.007

Cite this

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title = "MU-MIMO enabled uplink OFDMA MAC protocol in dense IEEE 802.11ax WLANs",

abstract = "IEEE 802.11ax supports orthogonal frequency division multiple access (OFDMA) for uplink (UL) transmissions where stations (STAs) access randomly chosen resource units (RUs) in a distributed manner. Nevertheless, as the number of STAs increases, frequent collisions can occur, which lead to throughput degradation in UL transmissions. To address this problem, we propose a multi-user multiple-input multiple-output (MU-MIMO) enabled UL OFDMA random access (MORA) protocol. MORA combines the ideas of OFDMA and MU-MIMO, and thus more than one STA can share the same RU, which can significantly reduce the collision probability in congested situations. Analytical and simulation results demonstrate that MORA improves the throughput of the standard OFDMA-only protocol significantly.",

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AU - Joo, Sohyun

AU - Kim, Taeyoon

AU - Song, Taewon

AU - Pack, Sangheon

PY - 2020/12

Y1 - 2020/12

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AB - IEEE 802.11ax supports orthogonal frequency division multiple access (OFDMA) for uplink (UL) transmissions where stations (STAs) access randomly chosen resource units (RUs) in a distributed manner. Nevertheless, as the number of STAs increases, frequent collisions can occur, which lead to throughput degradation in UL transmissions. To address this problem, we propose a multi-user multiple-input multiple-output (MU-MIMO) enabled UL OFDMA random access (MORA) protocol. MORA combines the ideas of OFDMA and MU-MIMO, and thus more than one STA can share the same RU, which can significantly reduce the collision probability in congested situations. Analytical and simulation results demonstrate that MORA improves the throughput of the standard OFDMA-only protocol significantly.

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MU-MIMO enabled uplink OFDMA MAC protocol in dense IEEE 802.11ax WLANs

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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