Abstract
Network congestion and signal quality degradation are the major problems of the Global System for Mobile communication (GSM), most especially as the number of customers increases. Consequently, there is a pressing demand for further research to improve network performance. However, congestion in various systems has always been tackled with various attempts, all of which falls in either the congestion avoidance category or congestion management category. Congestion avoidance has however been adjudged the best scheme for controlling network congestion and this is the approach employed in this research work. This research work is focused on determination of a busy BTS(s) within different GSM network areas, and how to manage the BTS(s) in order to reduce call blocking/dropping to the barest minimum. Traffic intensity value varies from one BTS to another, as it is directly proportional to the number of GSM users that make or receive calls within a particular period of time. This paper proposes a new scheme that will consider the number of reserved channels within a particular BTS. The scheme also considers the following; available channels, offered traffic, new call arrival rate, handoff call arrival rate and mean call duration. The continuous-time single dimensional birth–death process is also adopted to model and analyze the performance of this scheme. Moreover, MATLAB was used for simulation of the analytical equations which were obtained from the proposed state transition diagram. However, analytical method and simulation were used in this research work.
Highlights
With Global System for Mobile communication (GSM) communications, a user that initiates or receives a call may move around the area covered by the network
Having studied different schemes for managing new calls and handoff calls especially those of non-prioritised and prioritised schemes, the researcher is of the opinion that the available channels need better management scheme
The analysis on the performance of different handoff and new calls management schemes in mobile networks has been done in this work
Summary
With GSM communications, a user that initiates or receives a call may move around the area covered by the network. Several BSS will be reporting to the same Mobile Switching Center (MSC) which controls the traffic among many different cells. Each (MSC) is assigned a Visitors Location Register (VLR) where mobile stations which are outside their home cell are listed, so as to enable the network to be aware where to find them. The MSC will be connected to the Home Location Register (HLR), the Authentication Center (AUC), and the Equipment Identity Register (EIR). These connections of the MSC are to ensure that the system can verify that the users and equipment are legal subscribers. The MSC has the Ezenugu Isaac A. et al.: Prioritized Call Management Scheme with Adjustable Guard Channels interface to other networks such as Private Land Mobile Networks (PLMN) and Public Switched Telecommunication Network (PSTN) and Integrated Service Digital Network (ISDN) [1]
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