1.     How can A and B, separated possibly by thousands of kilometers within Nigeria, transmit voice to each other without each having to be subscribers to the same operator?

2.     More importantly, how can we ensure multi-user resource allocation such that if A is the originating consumer, it does not matter technologically (even if financially) which of ALL the other operators that B is a subscriber to, nor does it matter what type of transmission he or she is sending?

3.     The transmission of calls with out much congestion in the network.

This will form the bases for the project work.

1.3     PURPOSE OF THE STUDY   

The purpose of this research work is to establish a transparent set of Interconnection Rules, which shall encompass at least the following requirements:

* Every operator must allow all other operators full interconnection to its network at technically feasible and convenient points of interconnection, such that traffic may originate on one network and terminate on another, or otherwise pass across networks, without interference, signal deterioration, delay, congestion, or restriction.

* To design software that will serve as a congestion control system for multi-user telecommunication networks.

1.4     SIGNIFICANCE OF THE STUDY

This study will help us to know the status of GSM network resource allocation in Nigeria with a view to knowing areas to be addressed for better performance. This research work will aid telecommunication companies in Nigeria to achieve the following:

1.                 Keep record of calls across the GSM networks.

2.                 Use Interswitch to put calls through to the right designation without delay, distortions or diversion.

3.                 Determine the calling network and receiving network and use this information for the purpose of interconnectivity tariffs.

1.5     AIMS AND OBJECTIVES OF THE STUDY

Basically the aim of this project work is to design and simulate a multi-user congestion control system for MTN.

1.6     SCOPE OF THE PROJECT

This research covers network connectivity and traffic control of MTN network in Nigeria. The system covers all forms of voice calls across the network. Both call identification, recording and network interconnectivity.

1.7     CONSTRAINTS AND LIMITATIONS

Some of the constraints encountered during this project design include the following:

·              Financial Constraints: The design was achieved but not without some financial involvements. One had to pay for the computer time. Also the typing and planning of the work has its own financial involvements.  However, to solve the problems I solicited fund from guardians and relations.

·              High programming Technique: The programming aspect of this project posed a lot of problematic bugs that took me some days to solve. Problems such as the ADO, DAO and Jet Engine related run time errors. For instance, the Ms Access office 2000 edition does not work with VB-6. Jet Engine unless converted to lower version of Ms ACCESS of office 1997 edition (i.e. version 2.0). Also other technical problem, which requires semantic and syntactic approaches where encountered as well. In seeking for the solution to these problems, I acquired more knowledge from well versed textbooks and programmes.

·              The epileptic nature of power supply cannot be overlooked.  

1.8     DEFINITION OF TERMS

Inter-switch: Inter-Switch Link (ISL) is a trunking method developed by Cisco to use for Ethernet and Token Ring trunk connections.

Congestion: It is the overcrowding of route, leading to slow and inefficient flow. In computing, it is a situation in which the amount of information to be transferred is greater than the amount that the data communication path can carry.

Air interface: In a mobile phone network, the radio transmission path between the base station and the mobile terminal.

Asymmetric Transmission: Data transmissions where the traffic from the network to the subscriber is at a higher rate than the traffic from the subscriber to the network.

SIM: Subscriber Identity Module; A smart card containing the telephone number of the subscriber, encoded network identification details, the PIN and other user data such as the phone book. A user’s SIM card can be moved from phone to phone as it contains all the key information required to activate the phone.

Telecommunication: Are devices and systems that transmit electronic or optical signals across long distances. Telecommunication enables people around the world to contact one another to access information instantly, and to communicate from remote areas.