Research On The Service In Wireless Networks

This paper took service domain as the research object, and built a theoretical framework for the communication services. This paper not only proposed a performance evaluation of wireless network in theory, but also gave an analytical method of end-to-end service quality and user experience in engineering practice. This paper's technical ideas and results could be used to guide the development of future mobile Internet.Firstly, this paper put various types of services into enumeration, induction and classification. And then, this paper proposed four kinds of service model respectively target to network planning, queuing theory, source generator and general sense understanding. These service models have significant differences in expression, parameter, meaning and purpose. Because of the wide difference of service model in different areas and layers, this paper failed to find a unified mathematical closed expression to describe the service model.Taking service model as the basic particles, this paper proposed the concept of service capacity, and put it as wireless network's performance evaluation of service supporting. Service capacity is the upper bound of user experience weighted receiver rate sum. It has a similar effect of network throughput, also has the ability to reflect the user's experience, still can describe the multicast and broadcast influence to network performance. Our research shows that:the volatility rate of wireless service (burst and self-similarity), the service arrival and leave features, the asymmetry of the uplink and downlink, the distance between users (multi-hop), the multicast coefficient, and these five factors are the greatest impact for service capacity.In order to predict the quality of service (QoS) in the following period and put this predict to guide the network management and schedule, this paper further expanded the service flow performance analysis. Following the "point-line-surface" logic, this paper made a series of studies, including one-hop wireless link single service flow analysis, multi-hop single service flow analysis and parallel service flows analysis. Based on the three analyses, this paper proposed a complete methodology for end-to-end QoS prediction of service flow.The service model is used to describe wireless service. The service capacity is used to evaluate wireless network. The service flow analysis is used to predict and calculate the QoS. Integrating three tools together, it is the theoretical system to guide the next generation wireless network's planning and optimization from service domain view.In addition, this paper also talked about wireless service's features respect to fixed service, looked forward to the future mobile killer service, and discussed the possible commercial model and pricing strategy for wireless service. In addition to technical factors, the price mechanism is a good way to adjust network load and guide users'behavior.