Performance analysis of application-based QoS control in software-defined wireless networks

In this paper, the potential QoS performance improvement gained by applying application-based QoS control in wireless networks is investigated. Two important performance metrics, i.e. queuing delay and packet drop, are approximately modeled and derived for the QoS control at the base stations using a simplified queuing model. Based on it, the performance comparison between the approaches of application-based QoS control and the conventional class-based one is also presented. In order to have a more accurate performance evaluation, simulations are conducted for both approaches to verify the pervious analysis by using synthetic traffic of two different applications of Web browsing and video streaming. From the results of analysis and simulations, it is shown that the application-based QoS control indeed improves the QoS performance to certain extent than the class-based approach, in two kinds of typical traffic patterns.