الفهرس | Only 14 pages are availabe for public view |
Abstract In this thesis, it is required to design and study a Terminal-Oriented-Computer network which connects the governorates in the Arab Republic of Egypt, in the sense of satisfying the needs of anyone requesting service from a central facility located in Cairo. To realize this goal the governorates are provided with many term~nals distributed over a number of centers proportional to the population of the governorate. This network should ensure sm~ll time-delay as well as low cost. To make the design as systematic as possible, we’ve divided our study into three phases, each one composed of a group of programs which perform a determined job: I.Topological design: to obtain the network joining the governorates in the shortest possible paths, realizing thus some measure of cost saving. Increasing the number of paths increases reliability such that when anyone of them fails a small number of governorates will be disconnected. 2.Modelling the network: to acquire an accurate evaluation of the time-delay, buffer size and cost of the network obtained from the previous step, and to study the effect of changing the line capacity, on the above mentioned parameters. 3.Capacity assignment: to select from the set of capacities used in the study of the previous step, those which provide each of the obtained networks,with its own optimum time-delay/ cost characteristics. In our study, we have designed many networks to provide variable choices of time-delay, reliability and cost. |