Modeling And Performance Analysis Of QoS In Wireless Virtual Network

Present with advancement in the network management and low efficiency of resource use in wireless mobile network(WMN), the researcher put forward the concept of wireless virtual network. The idea of wireless virtual network(WVN) is to logically divide one wireless network into slices. Each slice with virtual queues that provided services in physical base station corresponded to each other. In such a way, the physical mobile wireless network can be partitioned into multiple virtual networks each operating as an independent wireless network. Wireless virtual network is made up of these virtual base stations(VBSs) and need to provide quality of services(Qo S) to mobile terminal user services. Most of the research are based on the research of project implementation and resource allocation algorithm, but less on theory and modeling work. This paper uses the theory of network calculus(NC) of the quality of service of wireless virtual network with some parameters of the model. For some key parameters of Qo S include queue length, network latency and effective bandwidth, especially their upper bound form. This thesis proposes a Qo S model for the wireless virtual network analysis these parameters. The Qo S model considers resources of both physical nodes and virtual node and provides a truly modeling of the latency and bandwidth behaviors of wireless virtual networks. Network calculus(NC) can effectively qualitative and quantitative analysis of the network, and it can provide a system with a better observation point, and it can efficiently realize the modeling. The numerical results have shown the effectiveness of the model for the rest of the thesis. The model is useful for both offline network planning and online control permissions.This paper mainly contains the following work:1) The wireless virtual network are systematically described. From the perspective of operational to describe the wireless network of the relationship between the components.Includes the physical base station, the virtual base station, terminal users, service flows, etc.2) Using the network calculus theory from the network queue length, upper and lower bounds of the network delay and the effective bandwidth, etc., expressed in a mathematical formula to propose a Qo S model of the wireless virtual network.3) The Qo S of some parameters in the wireless virtual network is analyzed. Through the latency, service rate, average arrival rate and burst tolerance comparison and analysis of these parameters to measure the performance of the model.