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Abstract
In this paper a new MAC protocol is proposed on the lines of the Incremental Collision Resolution Multiple Access (ICRMA) protocol, which we call the Coded Incremental Collision Resolution Multiple Access (CICRMA) protocol. As in the ICRMA, the channel is divided into cycles of variable length; each cycle consists of a contention period and a queue transmission period. The queue transmission period corresponds to a variable-length train of packets, which are transmitted by stations that have been added to the data transmission queue by successfully completing a collision-resolution round in the previous contention period. During the contention period, stations with one or more packets to send compete for the right to be added to the data-transmission queue using a deterministic tree-splitting algorithm. Spreading codes are incorporated for improved BER performance. While ICRMA uses binary tree-splitting algorithm, in the CICRMA protocol an n-ary tree-splitting algorithm is proposed, where n is the number of spreading codes used. Simulation of CICRMA vis-a-vis ICRMA shows that the throughput of CICRMA is marginally lesser than that of ICRMA in an ideal channel, however the throughput performance is found to be better than that of ICRMA when viewed through a practical faded channel. The Jakes fading model is employed for the simulation.
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Notes on contributors
S Malarvizhi
S Malarvizhi, received the BE Degree in Electronics and Communication Engineering from the University of Madras in 1989 and ME Degree in Applied Electronics from Bharathiyar University in 1991. She is in teaching for the past 12 years at SRM Engineering College and Pondicherry Engineering College, Pondicherry. Currently she is working as Assistant Professor in SRM Engineering College and doing research at Anna University. She has nearly 15 papers both in National/International Conferences
M Meenakshi
M Meenakshi, received her BE (Honours) Degree in Electronics and Communication Engineering from the Madurai Kamaraj University in 1989 and ME Degree in Applied Electronics from Anna University. She received PhD degree in the area of Optical CDMA networks from Anna University in 1998. Currently she is working as Assistant Professor in the school of ECE, Anna University, Chennai. Her areas of interest include wireless networks, optical wavlength routing networks, etc. She has more than 25 publications in National and International Conferences/Journals