Transmit and Reserve &amp;#40;TAR&amp;#41;: A Coordinated Channel Access for IEEE 802.11 Networks

Wehbi, Bachar; Laouiti, Anis; Cavalli, Ana

doi:10.1109/wcnc.2010.5506240

Cited by 4 publications

(6 citation statements)

References 15 publications

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“…The results have shown that load balancing can increase system throughput. Coordinated transmission has been addressed in several papers . To cope with increasing throughput requirements, 802.11n has been developed.…”

Section: Background and Related Workmentioning

confidence: 99%

Heterogeneous uncoordinated deployment of WLANs: an evolving problem for current and future Wi‐Fi access

Abusubaih

2012

Int J Network Mgmt

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SUMMARY This article addresses the problem of uncoordinated heterogeneous deployment of 802.11 wireless local area networks (WLANs). It is expected that such deployments by different WLAN owners and WiFi providers will become a challenging problem that limits the network performance and quality of service of wireless users. We present results of a real case study that show a need for coordination among WLAN devices in order to avoid current and future problems. We provide potential solution directions. A special focus is given to channel assignment and coordinated channel access problems. Our results show that a new paradigm for designing WLAN devices seems to be crucial. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Background and Related Workmentioning

confidence: 99%

Heterogeneous uncoordinated deployment of WLANs: an evolving problem for current and future Wi‐Fi access

Abusubaih

2012

Int J Network Mgmt

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“…Therefore some nodes can achieve significantly larger throughput than others. The fairness problem occurs due to the fact that the scheme resets the contention window of a successful sender to the minimum value after a single success, while other nodes continue to maintain larger contention windows, thus reducing their chances of seizing the channel and resulting in channel domination by the successful nodes [4][10] [21].…”

Section: Fig 1 Generic Backoff Schemementioning

confidence: 99%

Achieving Enhanced Throughput in Mobile ADHOC Network Using Collision Aware MAC Protocol

Gafur¹,

Upadhayaya²,

Sattar³

2011

IJASUC

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Since wireless medium is high demand resource the design of an efficient medium access protocol is important for Mobile Adhoc Networks. As MAC is the base layer in the protocol stack a performance gain in this layer will have significant improvement in the overall performance of the network. Since the current IEEE 802.11 MAC standard is not adaptive to the network scenario its performance is poor in terms of throughput, fairness and delay. Although several alternatives to the existing standard is proposed many of them are not satisfactorily address the key issues of keeping the simplicity of the protocol and avoiding the overhead on the nodes on duty in emergency situations where usually adhoc networks are applied. In this paper we propose an adaptive, collision aware MAC protocol for wireless adhoc networks, termed the Collision Based Contention (CBC) protocol, in which depends on the current collision level on the shared medium contending nodes dynamically decides its Backoff value to avoid a blind random waiting before access to the medium. The CBC scheme outperforms the BEB scheme employed in the IEEE 802.11 MAC standard and other competing proposals.

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“…In this paper, we study the performances of TAR [3] access channel mechanism in a highway ramp situations, where cars need a good coordination in order to avoid accident and insure vehicle merge smoothly with a minimum disturbance on a highway car traffic.…”

Section: Introductionmentioning

confidence: 99%

“…In a previous work, we have proposed the Transmit And Reserve (TAR) protocol [3] to organize the channel access and improve the channel utilization and the short term fairness with a minimum modification to the IEEE 802.11 mechanism. It does not require any additional overhead to maintain cluster formation neither slot period reservation.…”

Section: Introductionmentioning

confidence: 99%

TAR Channel Access Mechanism: A Study of a Highway Ramp Car Merge Case

Khoufi

Laouiti

Wehbi

2014

2014 6th International Conference on New Technologies, Mobility and Security (NTMS)

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Road critical situations like vehicles merging in a highway require a tight coordination between car drivers within a short time while vehicles are driving at high velocity. Any driver misbehavior or error may result in a car accident. Car communication offering information exchange in timely manner may drastically help drivers to accomplish this task and avoid incidents. Unfortunately, communication standard like 802.11p are not well dimensioned to guarantee the requirement of this kind of data exchange. In this paper we propose to use the Transmit And Reserve (TAR), an ad-hoc medium access protocol, for vehicular communications. We provide a study to demonstrate its adaptivity and short time fairness with regard to different highway car traffic conditions and we focus on a typical use case of a highway ramp car merge to show its efficiency.

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Transmit and Reserve (TAR): A Coordinated Channel Access for IEEE 802.11 Networks

Cited by 4 publications

References 15 publications

Heterogeneous uncoordinated deployment of WLANs: an evolving problem for current and future Wi‐Fi access

Heterogeneous uncoordinated deployment of WLANs: an evolving problem for current and future Wi‐Fi access

Achieving Enhanced Throughput in Mobile ADHOC Network Using Collision Aware MAC Protocol

TAR Channel Access Mechanism: A Study of a Highway Ramp Car Merge Case

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