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Average Packet Transfer Delay Performance of an Enhanced CSMA/CD based Single Channel Fast Ethernet Optical LAN

Shamima Kabir, and Abdullah M.K., and Sabira Khatun, and Mahdi M.A., (2007) Average Packet Transfer Delay Performance of an Enhanced CSMA/CD based Single Channel Fast Ethernet Optical LAN. Malaysian Journal of Science, 26 (2). pp. 117-126. ISSN 13943065

Full text not available from this repository.

Official URL: http://www.ejum.fsktm.um.edu.my/

Affiliations

TM International (Bangladesh) Limited.
Universiti Putra Malaysia. Faculty of Engineering. Dept. of Computer & Communication Systems Engineering (Wireless Laboratory).

Abstract

CSMA/CD based Ethernet does not guarantee delay bound and behaves poorly under heavy load conditions because of excessive collisions and backoff algorithm. It is not suitable for supporting real-time multimedia traffic. This paper presents an enhanced CSMA/CD to improve average packet transfer delay by reducing collisions. Here, each node has a finite buffer capacity that helps to reduce collisions. To guarantee a bounded delay for multimedia applications, the maximum retransmission attempt and backoff limit are reduced from 16 to 10 and from 10 to 8 respectively. Average packet transfer delay based on proposed CSMA/CD is evaluated against several design parameters i.e. number of nodes, bus length and offered load. The delay results show significant improvement. Percentage of collisions is reduced to less than 3% and thereby average packet transfer delay is reduced to less than 2 ms compared to conventional CSMA/CD.

Item Type:Journal
Keywords:CSMA/CD, Optical LAN, Fast Ethernet, collision reduction, average packet transfer delay
Subjects:Q Science, Computer Science
T Technology, Engineering
ID Code:2432

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