| Summary: | 碩士 === 中原大學 === 資訊管理研究所 === 94 === In wireless cellular network, it is expected to support integrating a diversity of data transmission services, such as audio, data, video and multimedia, etc. Besides making a great demand for bandwidth resource, multiplicity data transmission requests stringent Quality of Service. Bandwidth is the most critical resource in wireless cellular network and thus, the bandwidth resource must be managed in the most efficient method.
There is a disscussion on three important questions in the research. These points are as follows: First, according to user’s mobility probability, how many cells must be calculated their bandwidth? Second, how much bandwidth must be resvered properly? Third, how to obtain the balance of using bandwidth resource between new calls and handoff calls?
The chief purpose of this research is to address the effective bandwidth reservation algorithm. According to every user’s different service type and mobility probability, the algorithm can adjust and reserve user’s bandwidth. Besides, considering adding Service Level Agreement, in satisfying many constraints, such as user’s mobility characteristic, the structure of cells, the usage condition of bandwidth near cells and admission control, the algorithm provides a dynamic resource distribution mechanism to enhance an effect on a system, maximum usage of bandwidth and make service providers gain the most revenue.
The research simulates various cases to estimate benefit in experiment process, aims at bandwidth resource and maximum revenues to discuss especially, and provides Quality of Service guarantee and techniques of admission control. Besides, when a user communicates the agreement with a service provide, a user signs the agreement according to demend himself. After signing the agreement, the service provider must observe the agreement. Otherwise, the service provider will loss more revenue. In service providers’ aspects, when they communicate the agreement with users, they must consider carefully that they can reach users’ requests. When users sign the agreement or service providers manage network resources and proceed network services by means of the research achievements in future, I believe that it quite has a great benefit.
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