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Title Effect of Mobile Terminal Speed on QoS Parameters during Handoff Process in Wireless ATM Network
Journal International journal of Engineering And Applied Science
Publisher Faculty of Engineering, Nnamdi Azikiwe University, Awka Nigeria.
Issue 2
ISSN 1119-8109
Pages 1-12
Subject Electronic and Computer Engineering
Date of Publication December 31, 2018

AUTHOR(S) Donatus U. Onyishi and Godwin O. Uzedhe

ABSTRACT

In this research the effect of the mobile terminal speed on the handoff call dropping probability (HCDP) and new call blocking probability (NCBP) in wireless Asynchronous Transfer Mode (WATM) network is investigated. As a mobile terminal moves from one radio cell to another, a handoff process is needed to change its point of attachment on the network and the mobile speed affects these QoS parameters. In this study, a cell of 500 m radius was assumed and the mean call duration fixed at 180 seconds. The simulation numerical results show that the HCDP and NCBP exhibit error margins between decisions reached without the consideration of the mobile terminal speed. At a moderately low traffic intensity of 2018 erlangs, the error margins in HCDP at the mobile speed of 25, 50, 75, 100 and 125 km/hr are respectively 4.01E-22, 1.91E-17, 7.54E-15, 6.83E-13 and 6.42E-12. The NCBP error margins at these speeds are respectively 5.56E-11, 2.50E-06, 9.57E-4, 8.54E-2 and 7.94E-1. This clearly shows that the error margin increases with increase in mobile terminal speed and the effect is more pronounced on NCBP.


Keywords: Handoff Dropping probability, New Call Blocking Probability, Wireless ATM network, Markov Chain




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