Performance Analysis of WLANs under Bursty and Correlated Video Traffic
Noushin Najjari, Geyong Min, Jia Wen Hu, Wang Miao · 2017
Proliferation of mobile digital devices has posed major challenges for design and implementation of Wireless Local Area Networks (WLANs), leading to stringent quality of service (QoS) requirements. Extreme burstiness and correlation characteristics of multimedia traffics generated by digital devices require accurate modelling and analysis to provide satisfactory end user experience. Most existing performance models for WLANs are developed under unrealistic assumptions where burstiness and correlation characteristics of network traffic are ignored. This paper proposes an original analytical model as a cost-effective tool to evaluate the performance of WLANs in the presence of realistic video traffic, taking into account burstiness and correlation characteristics using Batch Markovian Arrival Process (BMAP). The model derives important QoS metrics in terms of throughput, end-to-end delay and frame loss probability. The accuracy of the obtained results are validated via extensive simulation experiments executed in NS2 subject to traffic parameters obtained from real-world video sources generated by practical multimedia applications. The results reveal how burstiness and correlation of video traffic affects QoS performance of WLANs.