| Summary: | 碩士 === 淡江大學 === 資訊管理學系 === 87 === At beginning construction of a network, we usually can only consider the connectivity between two networks because it is hard to predict exactly what the future growth would be for information interchange among networks. Follows by the increase of network information, the capacity of the original network transferring can not satisfied the needs of information transfer which increases gradually day by day. Hence, the new application are constantly developed which brings in new needs for information transfer. It also shows the shortage of bandwidth which makes the expansion of line capacity necessary.
This research is to exam the Network Operation Center, NOC, how they face and solve the problems occurred when expanding its line capacity. By then they can completely exploit the efficiency of expanded lines and as well to reach the goal by satisfying the information transfer capacity. In this research, we try to use NOC as a node to build a flow analysis model which describes the Internet between NOC. Thus, this model would be used to analyze the flow before expanding channel capacity. Due to the characteristic of packet switch in digital network, we can not use the limited line capacity for basis. Instead, we should use the ones are actually occupied. Therefore, we introduce a method to estimate the actual usage capacity in order to find the actual flow of packets for those bottleneck in networks. Furthermore, we then can formulate out various well issues in expanding line capacity for networks.
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