Enhanced Backoff Scheme in CSMA/CA for IEEE 802.11

Wen Kuang Kuo; Fang Liu; C. C. Jay Kuo

doi:10.1117/12.486778

Enhanced Backoff Scheme in CSMA/CA for IEEE 802.11

Wen Kuang Kuo, Fang Liu, C. C. Jay Kuo

Institute of Computer and Communication Engineering

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

An enhanced CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) protocol to be used in the Medium Access Control (MAC) layer of the IEEE 802.11 standard for wireless local area networks (wireless LANs) is proposed in this work. In wireless LANs, the CSMA/CA protocol supports asynchronous data transfer, and adopts an acknowledgement mechanism to confirm successful transmissions and a handshaking mechanism to reduce collisions. In both cases, a binary exponential backoff mechanism is used. The enhanced protocol improves the exponential backoff scheme by dynamically adjusting the contention window (CW) around the optimal value. Moreover, an analytical model based on the Markov chain is developed to analyze the system performance in terms of throughput and delay. Numerical results are presented to show the effect of the proposed backoff mechanism.

Original language	English
Pages (from-to)	92-103
Number of pages	12
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5100
DOIs	https://doi.org/10.1117/12.486778
Publication status	Published - 2003
Event	PROCEEDINGS OF SPIE SPIE - The International Society for Optical Engineering: Digital Wireless Communications V - Orlando, FL, United States Duration: 2003 Apr 21 → 2003 Apr 22

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.486778

Cite this

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title = "Enhanced Backoff Scheme in CSMA/CA for IEEE 802.11",

abstract = "An enhanced CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) protocol to be used in the Medium Access Control (MAC) layer of the IEEE 802.11 standard for wireless local area networks (wireless LANs) is proposed in this work. In wireless LANs, the CSMA/CA protocol supports asynchronous data transfer, and adopts an acknowledgement mechanism to confirm successful transmissions and a handshaking mechanism to reduce collisions. In both cases, a binary exponential backoff mechanism is used. The enhanced protocol improves the exponential backoff scheme by dynamically adjusting the contention window (CW) around the optimal value. Moreover, an analytical model based on the Markov chain is developed to analyze the system performance in terms of throughput and delay. Numerical results are presented to show the effect of the proposed backoff mechanism.",

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AU - Kuo, Wen Kuang

AU - Liu, Fang

AU - Jay Kuo, C. C.

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N2 - An enhanced CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) protocol to be used in the Medium Access Control (MAC) layer of the IEEE 802.11 standard for wireless local area networks (wireless LANs) is proposed in this work. In wireless LANs, the CSMA/CA protocol supports asynchronous data transfer, and adopts an acknowledgement mechanism to confirm successful transmissions and a handshaking mechanism to reduce collisions. In both cases, a binary exponential backoff mechanism is used. The enhanced protocol improves the exponential backoff scheme by dynamically adjusting the contention window (CW) around the optimal value. Moreover, an analytical model based on the Markov chain is developed to analyze the system performance in terms of throughput and delay. Numerical results are presented to show the effect of the proposed backoff mechanism.

AB - An enhanced CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) protocol to be used in the Medium Access Control (MAC) layer of the IEEE 802.11 standard for wireless local area networks (wireless LANs) is proposed in this work. In wireless LANs, the CSMA/CA protocol supports asynchronous data transfer, and adopts an acknowledgement mechanism to confirm successful transmissions and a handshaking mechanism to reduce collisions. In both cases, a binary exponential backoff mechanism is used. The enhanced protocol improves the exponential backoff scheme by dynamically adjusting the contention window (CW) around the optimal value. Moreover, an analytical model based on the Markov chain is developed to analyze the system performance in terms of throughput and delay. Numerical results are presented to show the effect of the proposed backoff mechanism.

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Enhanced Backoff Scheme in CSMA/CA for IEEE 802.11

Abstract

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