CONGESTION CONTROL IN GLOBAL SYSTEM FOR MOBILE COMMUNICATION (GSM) NETWORK USING HYBRID MODEL ALGORITHM

Summary

Global System for Mobile Communication (GSM) is a telecommunication network that is used globally for
communication services such as voice communication, data connection for fax, short message service (SMS) and full
dial-up connection to the internet for e-mail and web browsing. This network especially in Nigeria is faced with
serious challenge of traffic congestion, leading to call drops, incomplete calls, cross-talks, distorted or faint talks and
other undesirable effects. It is necessary that a means of managing this congestion so that subscribers can get desired
satisfaction from GSM available services is taken into consideration. In this paper therefore a hybrid model algorithm
for managing signal traffic congestion is developed. Based on the algorithm, the performance of the GSM network is
extensively evaluated using the key parameter indicators which include call set-up success rate (CSSR), call drop rate
(CDR), call completion success rate (CCSR) and traffic channel congestion rate (TCHCR). In this research work, a
hybrid model for managing signal traffic congestion is developed. Based on the hybrid model, the performance of the
GSM network is extensively evaluated using the key parameter indicators which include; Call Set-up Success Rate
(CSSR), Call Drop Rate (CDR), Call Completion Success Rate (CCSR), Traffic Channel Congestion Rate (TCHCR).
The paper discusses different schemes like block time sharing, dynamic allocation without time slicing, dynamic
allocation with time slicing with signal sensing, frequently recent call allocation and priority allocation models for
providing good Quality of Service (QoS) in GSM networks. A comparison of the performance of the hybrid model with
other examined models in congestion centres reveals that the hybrid model has an improved performance (Quality of
Service) over the other examined models (non-hybrid models).

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