Integrating Multiuser Dynamic OFDMA into IEEE 802.11 WLANs - LLC/MAC Extensions and System Performance

Valentin, Stefan; Freitag, T.; Karl, Holger

doi:10.1109/icc.2008.626

Cited by 21 publications

(5 citation statements)

References 16 publications

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“…The use of OFDMA adds a new degree of flexibility to the use of spectrum resources by dividing the channel width into multiple narrow channels. Then, these narrow channels can be used to transmit to multiple users in parallel [11]. A basic implementation of OFDMA in WLANs may simply consider the use of multiple independent 20 MHz channels.…”

Section: Ofdmamentioning

confidence: 99%

IEEE 802.11ax: High-efficiency WLANS

Bellalta

2016

IEEE Wireless Commun.

344

207

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IEEE 802.11ax-2019 will replace both IEEE 802.11n-2009 and IEEE 802.11ac-2013 as the next high-throughput Wireless Local Area Network (WLAN) amendment. In this paper, we review the expected future WLAN scenarios and use-cases that justify the push for a new PHY/MAC IEEE 802.11 amendment. After that, we overview a set of new technical features that may be included in the IEEE 802.11ax-2019 amendment and describe both their advantages and drawbacks. Finally, we discuss some of the network-level functionalities that are required to fully improve the user experience in next-generation WLANs and note their relation with other on-going IEEE 802.11 amendments.

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Section: Ofdmamentioning

confidence: 99%

IEEE 802.11ax: High-efficiency WLANS

Bellalta

2016

IEEE Wireless Commun.

344

207

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“…Scheduling in time and frequency for mesh networks where mesh routers are responsible for channel assignment is discussed in [13]. Valentin et al [14] use OFDMA in 802.11 networks to achieve multi-user diversity. The adoption of OFDMA in ad hoc networks has been explored by a number of recent works [7], [15].…”

Section: Related Workmentioning

confidence: 99%

OFDMA Based Multiparty Medium Access Control in Wireless Ad Hoc Networks

Veyseh

Garcia-Luna-Aceves

Sadjadpour

2009

2009 IEEE International Conference on Communications

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We present the Concurrent Transmission or Reception Multiple Access (CTRMA) protocol as an example of embracing interference in wireless ad hoc networks, even when each node is endowed with a single half-duplex radio and a single antenna. CTRMA uses OFDMA to enable each node to either send or receive multiple concurrent transmissions over orthogonal subchannels (groupings of subcarriers). With CTRMA, a node transmits multiple transmissions at the same time by negotiating the subchannels over which transmissions take place by using information attained with a channel priority assignment algorithm. CTRMA supports dynamic bandwidth selection and enhances channel reuse. We prove the correctness of CTRMA and use simulation experiments to illustrate the major performance advantages of CTRMA over prior channel access protocols proposed for single-radio single-channel, single-radio multi-channel and multi-radio multi-channel wireless ad hoc networks.

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“…Multi-user transmission using OFDMA in IEEE 802.11 WLANs has been widely investigated in many literatures [2]- [5]. However, most of them focus on the multi-user diversity gain which enhances the throughput performance.…”

Section: Introductionmentioning

confidence: 99%

Novel DCF-based multi-user MAC protocol and dynamic resource allocation for OFDMA WLAN systems

Takuya

Miyamoto

Sampei

et al. 2013

2013 International Conference on Computing, Networking and Communications (ICNC)

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To enhance the throughput of wireless local area networks (WLANs) while satisfying the quality of service (QoS) requirements, this paper proposes a novel DCF-based multi-user MAC protocol employing orthogonal frequency division multiple access (OFDMA) scheme. In the proposed protocol, an access point (AP) acts as a master to organize all the stations within the basic service set (BSS) and reserves the radio resource by the conventional distributed coordination function (DCF). In the resource reservation period, the AP performs a flexible access control utilizing the fine-grained resource block and the opportunistic scheduling based on the QoS requirements and the channel condition of each station. With the objective to increase the spectrum efficiency as well as to satisfy the QoS requirements, this paper also proposes a dynamic resource allocation algorithm. Numerical results confirm that the proposed multi-user MAC protocol ensures the QoS requirement with a high probability and enhances the throughput performance.

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Integrating Multiuser Dynamic OFDMA into IEEE 802.11 WLANs - LLC/MAC Extensions and System Performance

Cited by 21 publications

References 16 publications

IEEE 802.11ax: High-efficiency WLANS

IEEE 802.11ax: High-efficiency WLANS

OFDMA Based Multiparty Medium Access Control in Wireless Ad Hoc Networks

Novel DCF-based multi-user MAC protocol and dynamic resource allocation for OFDMA WLAN systems

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