Group Contention-Based OFDMA MAC Protocol for Multiple Access Interference-Free in WLAN Systems

Jung, Junwoo; Lim, Jaesung

doi:10.1109/twc.2011.122211.102316

Cited by 26 publications

(8 citation statements)

References 20 publications

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“…AP collects the UL transmission request sent by nodes during the first stage, and AP schedules multiple nodes to achieve parallel data transmission using OFDMA during the second stage. Jung and Lim [71] propose that AP divides the nodes into several groups, and then AP schedules each group for channel access using OFDMA.…”

Section: ) Ofdma Based Mu-macmentioning

confidence: 99%

Survey and Performance Evaluation of the Upcoming Next Generation WLANs Standard - IEEE 802.11ax

Yang

et al. 2019

Mobile Netw Appl

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With the ever-increasing demand for wireless traffic and quality of serives (QoS), wireless local area networks (WLANs) have developed into one of the most dominant wireless networks that fully influence human life. As the most widely used WLANs standard, Institute of Electrical and Electronics Engineers (IEEE) 802.11 will release the upcoming next generation WLANs standard amendment: IEEE 802.11ax. This article comprehensively surveys and analyzes the application scenarios, technical requirements, standardization process, key technologies, and performance evaluations of IEEE 802.11ax. Starting from the technical objectives and requirements of IEEE 802.11ax, this article pays special attention to high-dense deployment scenarios. After that, the key technologies of IEEE 802.11ax, including the physical layer (PHY) enhancements, multi-user (MU) medium access control (MU-MAC), spatial reuse (SR), and power efficiency are discussed in detail, covering both standardization technologies as well as the latest academic studies. Furthermore, performance requirements of IEEE 802.11ax are evaluated via a newly proposed systems and link-level integrated simulation platform (SLISP). Simulations results confirm that IEEE 802.11ax significantly improves the user experience in high-density deployment, while successfully achieves the average per user throughput requirement in project authorization request (PAR) by four times compared to the legacy IEEE 802.11. Finally, potential advancement beyond IEEE 802.11ax are discussed to complete this holistic study on the latest IEEE 802.11ax. To the best of our knowledge, this article is the first study to directly investigate and analyze the latest stable version of IEEE 802.11ax, and the first work to thoroughly and deeply evaluate the compliance of the performance requirements of IEEE 802.11ax.

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Section: ) Ofdma Based Mu-macmentioning

confidence: 99%

Survey and Performance Evaluation of the Upcoming Next Generation WLANs Standard - IEEE 802.11ax

Yang

et al. 2019

Mobile Netw Appl

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“…In the following subsections, the mechanism and analytical model of the proposed medium access control algorithms and related assumptions are presented. In terms of the various evaluation criteria used for our algorithms and previous research, and used for comparison between the previous research [21][22][23][24] and our algorithm is proposed as Table 2. The MU transmission and MU access represent feature of simultaneous channel access and concurrent data transmission of STAs by taking advantage of the frequency orthogonality of OFDMA.…”

Section: Proposed Opportunistic Medium Accessmentioning

confidence: 99%

Interference-Aware Adaptive Beam Alignment for Hyper-Dense IEEE 802.11ax Internet-of-Things Networks

Kwon

Kim

et al. 2018

Preprint

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“…al. [10] proposed GC-OFDMA, a group based hybrid OFDMA and CSMA/CA MAC protocol. Like [7], GC-OFDMA allows STAs to use CSMA/CA to contend on separate sub-channels.…”

Section: Related Workmentioning

confidence: 99%

Resource management for OFDMA based next generation 802.11 WLANs

Karaca

Bastani

Priyanto

et al. 2016

2016 9th IFIP Wireless and Mobile Networking Conference (WMNC)

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Recently, IEEE 802.11ax Task Group has adapted OFDMA as a new technique for enabling multi-user transmission. It has been also decided that the scheduling duration should be same for all the users in a multi-user OFDMA so that the transmission of the users should end at the same time. In order to realize that condition, the users with insufficient data should transmit null data (i.e. padding) to fill the duration. While this scheme offers strong features such as resilience to Overlapping Basic Service Set (OBSS) interference and ease of synchronization, it also poses major side issues of degraded throughput performance and waste of devices' energy. In this work, for OFDMA based 802.11 WLANs we first propose practical algorithm in which the scheduling duration is fixed and does not change from time to time. In the second algorithm the scheduling duration is dynamically determined in a resource allocation framework by taking into account the padding overhead, airtime fairness and energy consumption of the users. We analytically investigate our resource allocation problems through Lyapunov optimization techniques and show that our algorithms are arbitrarily close to the optimal performance at the price of reduced convergence rate. We also calculate the overhead of our algorithms in a realistic set-up and propose solutions for the implementation issues.

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Group Contention-Based OFDMA MAC Protocol for Multiple Access Interference-Free in WLAN Systems

Cited by 26 publications

References 20 publications

Survey and Performance Evaluation of the Upcoming Next Generation WLANs Standard - IEEE 802.11ax

Survey and Performance Evaluation of the Upcoming Next Generation WLANs Standard - IEEE 802.11ax

Interference-Aware Adaptive Beam Alignment for Hyper-Dense IEEE 802.11ax Internet-of-Things Networks

Resource management for OFDMA based next generation 802.11 WLANs

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