Resource management for OFDMA based next generation 802.11 WLANs

Karaca, Mehmet; Bastani, Saeed; Priyanto, Basuki Endah; Safavi, Mohammadhassan; Landfeldt, Bjorn

doi:10.1109/wmnc.2016.7543930

Cited by 29 publications

(15 citation statements)

References 11 publications

(38 reference statements)

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“…However, it has been rarely implemented in conventional WLANs. Some recent studies like [19] and [20] have explored resource management aspects of IEEE 802.11ax WLANs. However, the use of IEEE 802.11ax for industrial communication has been rarely investigated.…”

Section: Related Workmentioning

confidence: 99%

High-Performance Industrial Wireless: Achieving Reliable and Deterministic Connectivity Over IEEE 802.11 WLANs

Aijaz

2020

IEEE Open J. Ind. Electron. Soc.

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Communication for control-centric industrial applications is characterized by the requirements of very high reliability, very low and deterministic latency and high scalability. Typically, IEEE 802.11-based wireless local area networks (WLANs), also known as Wi-Fi networks, are deemed ineligible for industrial control applications owing to insufficient reliability and non-deterministic latency. This paper proposes a novel solution for providing reliable and deterministic communication, through Wi-Fi, in industrial environments. The proposed solution, termed as HAR 2 D-Fi (Hybrid channel Access with Redundancy for Reliable and Deterministic Wi-Fi), adopts hybrid channel access mechanisms for achieving deterministic communication. It also provides temporal redundancy for enhanced reliability. HAR 2 D-Fi implements different medium access control (MAC) designs that build on the standard physical (PHY) layer. Such designs can be classified into two categories: (a) MAC designs with pre-defined (physical) time-slotted schedule, and (b) MAC designs with virtual time-slotted schedule. Performance evaluation, based on analysis and system-level simulations, demonstrates the viability of HAR 2 D-Fi for control-centric industrial applications.

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Section: Related Workmentioning

confidence: 99%

High-Performance Industrial Wireless: Achieving Reliable and Deterministic Connectivity Over IEEE 802.11 WLANs

Aijaz

2020

IEEE Open J. Ind. Electron. Soc.

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“…OFDMA is a multiple user technology used even in LTE and WiMAX, where the OFDM subcarriers are grouped into Resource Units (RUs) in order to improve the frequency utilization efficiency by assigning good signal quality RUs to multiple users [15], [16]. In 802.11ax, it is possible to support simultaneous transmission of up to nine users in the 20MHz bandwidth using 1/4th of the sub-carrier spacing arranged with the conventional standards.…”

Section: Standardization Trend In Ieee 80211ax Wlanmentioning

confidence: 99%

A Novel Low-Overhead Channel Sounding Protocol for Downlink Multi-User MIMO in IEEE 802.11ax WLAN

Nabetani

Madhavan

Mori

et al. 2018

IEICE Trans. Commun.

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The next generation wireless LAN standard IEEE 802.11ax aims to provide improved throughput performance in dense environments. We have proposed an efficient channel sounding mechanism for DL-MU-MIMO that has been adopted as a new sounding protocol in the 802.11ax standard. In this paper, we evaluate the overhead reduction in the 802.11ax sounding protocol compared with the 802.11ac sounding protocol. Sounding is frequently performed to obtain accurate channel information from the associated stations in order to improve overall system throughput. However, there is a trade-off between accurate channel information and the overhead incurred due to frequent sounding. Therefore, the sounding interval is an important factor that determines system throughput in DL-MU-MIMO transmission. We also evaluate the effect of sounding interval on the system throughput performance using both sounding protocols and provide a comparative analysis of the performance improvement. key words: channel sounding protocol, IEEE 802.11ax, wireless LANs

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“…The AP allocates RUs to the stations which use them later for data transmissions over the UL. In [13] a new method to use OFDMA over the UL is suggested, where MAC Protocol Data Units (MPDU) from the stations are of different lenghs. In [14][15][16][17]…”

Section: Previous Workmentioning

confidence: 99%

Scheduling Strategies and Throughput Optimization for the Uplink for IEEE 802.11ax and IEEE 802.11ac Based Networks

Sharon¹,

Alpert²

2017

WSN

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The new IEEE 802.11 standard, IEEE 802.11ax, has the challenging goal of serving more Uplink (UL) traffic and users as compared with his predecessor IEEE 802.11ac, enabling consistent and reliable streams of data (average throughput) per station. In this paper we explore several new IEEE 802.11ax UL scheduling mechanisms and compare between the maximum throughputs of unidirectional UDP Multi Users (MU) triadic. The evaluation is conducted based on Multiple-Input-Multiple-Output (MIMO) and Orthogonal Frequency Division Multiple Access (OFDMA) transmission multiplexing format in IEEE 802.11ax vs. the CSMA/CA MAC in IEEE 802.11ac in the Single User (SU) and MU modes for 1, 4, 8, 16, 32 and 64 stations scenario in reliable and unreliable channels. The comparison is conducted as a function of the Modulation and Coding Schemes (MCS) in use. In IEEE 802.11ax we consider two new flavors of acknowledgment operation settings, where the maximum acknowledgment windows are 64 or 256 respectively. In SU scenario the throughputs of IEEE 802.11ax are larger than those of IEEE 802.11ac by 64% and 85% in reliable and unreliable channels respectively. In MU-MIMO scenario the throughputs of IEEE 802.11ax are larger than those of IEEE 802.11ac by 263% and 270% in reliable and unreliable channels respectively. Also, as the number of stations increases, the advantage of IEEE 802.11ax in terms of the access delay also increases.

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Resource management for OFDMA based next generation 802.11 WLANs

Cited by 29 publications

References 11 publications

High-Performance Industrial Wireless: Achieving Reliable and Deterministic Connectivity Over IEEE 802.11 WLANs

High-Performance Industrial Wireless: Achieving Reliable and Deterministic Connectivity Over IEEE 802.11 WLANs

A Novel Low-Overhead Channel Sounding Protocol for Downlink Multi-User MIMO in IEEE 802.11ax WLAN

Scheduling Strategies and Throughput Optimization for the Uplink for IEEE 802.11ax and IEEE 802.11ac Based Networks

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