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Call admission control using cell breathing concept for wideband CDMA

By Jyoti L. Mishra, Keshav P. Dahal and M. Alamgir Hossain

Abstract

This paper presents a Call Admission Control\ud (CAC) algorithm based fuzzy logic to maintain the quality of\ud service using cell breathing concept. When a new call is accepted\ud by a cell, its current user is generally affected due to cell\ud breathing. The proposed CAC algorithm accepts a new call only\ud if the current users in the cell are not jeopardized. Performance\ud evaluation is done for single-cell and multicell scenarios. In\ud multicell scenario dynamic assignment of users to the\ud neighboring cell, so called handoff, has been considered to\ud achieve a lower blocking probability. Handoff and new call\ud requests are assumed with handoff being given preference using\ud a reserved channel scheme. CAC for different types of services\ud are shown which depend upon the bandwidth requirement for\ud voice, data and video. Distance, arrival rate, bandwidth and nonorthogonality\ud factor of the signal are considered for making the\ud call acceptance decision. The paper demonstrates that fuzzy logic\ud with the cell breathing concept can be used to develop a CAC\ud algorithm to achieve a better performance evaluation

Topics: Call admission control, Performance evaluation, Blocking probability, Fuzzy logic, Cell breathing
Year: 2006
OAI identifier: oai:bradscholars.brad.ac.uk:10454/2455
Provided by: Bradford Scholars

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