期刊名称：International Journal of Wireless & Mobile Networks
印刷版ISSN：0975-4679
电子版ISSN：0975-3834
出版年度：2014
卷号：6
期号：5
页码：93
DOI：10.5121/ijwmn.2014.6508
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：The delivering of both good quality of service (QoS) and Grade of Service (GoS) in any competitive mobilecommunication environment is a major factor to reducing subscribers’ churn rate. Therefore, it isimportant for wireless mobile network operators to ensure stability and efficiency by delivering aconsistent, reliable and high-quality end user (subscriber) satisfaction. This can only be achieve byconducting a regular network performance monitoring and optimisation as it directly impacts the quality ofthe offered services and hence user satisfaction. In this paper, we present the results of networkperformance evaluation and optimisation of a GSM network on cell cluster-basis, in Asaba region, SouthEast Nigeria. We employ a combination of essential key performance indicators such as dropped call rate,call setup success rate and outage call rate to examine overall QoS and GoS performance of the GSMnetwork. Our results after network optimisation showed significant performance improvement in terms ofcall drop rate, call set up success rate, and call block rate across. Specifically, the end user satisfactionrate has increased from 94.45%, 87.74%, and 92.85% to 99.05%, 95.38% and 99.03% respectively acrossthe three GSM cell clusters. The GoS is reduced from 3.33%, 6.60% and 2.38% to 0.00%, 3.70% and0.00% respectively. Furthermore, ESA, which correspond end points service availability, has improvedfrom 94.44%, 93.40% and 97.62% to 100%, 96.30% and 100% respectively. In addition, the averagethroughput has improved from 73.74kbits/s, 85.06kbits/s and 87.54kbits/s to 77.07kbits/s, 92.38kbits/s and102kbits/s respectively across the three GSM cell clusters.
关键词：Quality of Service; Grade of Service; Network Optimisation; End user Satisfaction
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