On the Provisioning of Guaranteed QoS in Wireless Internet with Self-Similar Traffic Input based on G/M/1 Queueing System and Limited Service Polling Model
Mohsin Iftikhar, Rahhal Malik Bacheer Rahhal, Mansour Zuair · Charles Sturt University Research Output (CRO) · 2011
Over the past decade, we have witnessed a growing popularity of new wireless architecturessuch as 3G/4G, Wi-Fi and WiMAX due to the increase in demand for wireless Internet access. The all-IPbased future mobile and wireless network model is expected to be the most dominant architecture for QoSprovisioning in next-generation wireless networks, mainly due to its scalability and capability of interworkingheterogeneous wireless access networks. Recently, the rapid growth of various wirelessinfrastructures and the interesting mixture of wireless traffic generated by large number of devices (PDAs,Laptops and cell-phones) have diverted the attention of wireless research community towards understandingthe nature of traffic carried by different wireless architectures. A series of recent studies on GPRS aggregatedtraffic, WAP and Web traffic has proven that just like fixed IP traffic, wireless traffic also exhibits stronglong-range dependency. However, much of the current understanding of wireless traffic modeling builds onclassical Poisson distributed traffic, which can yield misleading results and hence poor wireless networkplanning. In this paper, we contribute to the accurate modeling of wireless IP traffic by considering threedifferent classes of traffic that exhibit long-range dependency and self-similarity. We consider a model ofthree queues based on G/M/1 queueing system and analyze it on the basis of novel scheduling logic andderive exact bounds on packet delay for the corresponding traffic classes. We also develop a comprehensivediscrete event simulator to understand the QoS behavior of the corresponding traffic classes under thisproposed scheduling scheme. The novel scheduling logic outperforms the traditional schemes such as priorityand round robin and serves as the basis to offer guaranteed QoS relevant to the diversified requirement ofdifferent applications in this heterogeneous mixture of wireless networks.