Physical layer capture aware MAC for WLANs

Jeong, Jiwoong; Choi, Sunwoong; Yoo, Joon; Lee, Suchul; Kim, Chong-Kwon

doi:10.1007/s11276-012-0483-7

Cited by 6 publications

(2 citation statements)

References 17 publications

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“…In ref. [25], an MAC algorithm is proposed that utilizes the average waiting time as a common control reference, facilitating nodes to achieve equitable channel access by modifying one of the parameters of the IEEE 802.11-enhanced distributed channel access: contention window, arbitration inter-frame space, or transmission opportunity.…”

Section: Related Workmentioning

confidence: 99%

A Novel Framed Slotted Aloha Medium Access Control Protocol Based on Capture Effect in Vehicular Ad Hoc Networks

Lai,

Song,

2024

Sensors

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The capture effect is a frequently observed phenomenon in vehicular ad hoc networks (VANETs) communication. When conflicts arise during time slot access, failure to access does not necessarily occur; instead, successful access may still be achieved. The capture effect can enhance the likelihood of multiple access and improve communication efficiency. The security of VANETs communication is undoubtedly the primary concern. One crucial approach to enhance security involves the design of an efficient and reliable medium access control (MAC) protocol. Taking into account both aspects, we propose a novel framed slotted Aloha (FSA) MAC protocol model. Firstly, we derive the closed-form expression for the capture probability in the Rician fading channel in this paper. Subsequently, we analyze how the number of vehicles and time slots influence the success probability of vehicle access channels as well as examine the impact of the capture effect on this success probability. Then, under constraints regarding vehicle access channel success probability, we derive optimal values for slot numbers, access times, and transmission power while proposing a comprehensive implementation method to ensure high access channel success probabilities. We verify both theoretical derivations and proposed methods through simulation experiments.

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Section: Related Workmentioning

confidence: 99%

A Novel Framed Slotted Aloha Medium Access Control Protocol Based on Capture Effect in Vehicular Ad Hoc Networks

Lai,

Song,

2024

Sensors

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“…Various PHY layer capture aware MAC mechanism are proposed for wireless area local area networks WLANs. To meet fair access and high overall throughputs, (Jeong et al 2013) changes either the contention window or arbitration inter-frame space or transmission opportunity. The technique in (Patras et al 2014) uses different power levels to result in packet capture in WLANs and improve the performance.…”

Section: Related Workmentioning

confidence: 99%

Capture Aware Channel Access Protocol in Wireless Network

Mustafa

2018

Jou. Eng. Res.

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Spatial reuse in wireless networks is limited by the SINR threshold and it might be feasible to capture a packet in the presence of ongoing foreign transmission. This work considers a new capture aware channel access protocol by incorporating global channel state information in the decision making process for the channel access jointly with adaptive power framework. The protocol employs power heterogeneous ad-hoc networks; it assigns different transmission power level to individual nodes based on dynamic observation of the network traffic. It exploits spatial heterogeneity of flows at a given channel allocation and sets up either symmetric or asymmetric carrier sensing which in turn schedules the data packets transmission to maintain adequate service quality and fairness enjoyed by a user. It stands atop capture capable PHY to leverage the channel reuse which is of paramount importance in the design of high capacity ad-hoc networks. Through extensive simulations, the paper demonstrates the efficacy of the new protocol. It delivers high network utilization and also provides fair access to the media.

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