Paper Title
Investigation On Accessibility Index And Quality Of Service Of Gsm Networks In Ekpoma, Nigeria

Abstract
The paper investigates the accessibility index of cellular mobile networks at Ekpoma. The objective was to determine the performance and quality of service of GSM networks providers in Ekpoma, Nigeria. The assessment was based on the ability of a mobile network to setup and hold calls for a duration of 140 seconds. A total of 34,112 calls, made up of 8,528 intra-networks and 25,584 inter-networks, were initiated at 41 test points for a period of one year (May 2014 to April 2015). The test points selected spread across Ekpoma to account for all possible climatic conditions. The results showed that when network signals were available, steady and within the international acceptable standard of received signal strength level greater than �93dBm, all cellular mobile network operators at Ekpoma offered a good quality of service with an accessibility index greater than 81%. Conversely, the performance of all networks during periods of poor or fluctuating signals and both is unsatisfactory. Keywords- Accessibility Index; Global System For Mobile Communication (GSM); Network Operator, Subscribers, Test Points.