期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2015
卷号：6
期号：2
页码：1457-1459
出版社：TechScience Publications
摘要：A CHOKe is a simple to implement and stateless active queue management (AQM) schème. The top notch property that makes CHOKe attractive is that it can protect responsive TCP flows from unresponsive UDP flow. Studies have proved that both bandwidth share and buffer share of UDP traffic in a link can be bound together using a CHOKe. These studies were done and focus only for a steady state where the queue reaches equilibrium in the presence of many TCP flows and an non responsive UDP flow of fixed arrival rate. Studies failed to prove whether the protection property of CHOKe is valid especially when UDP traffic rate changes over time. For instance when the UDP rates falls to zero, the unresponsive flow may assume close to full utilization in sub-round-trip-time (sub- RTT) scales, thereby making the TCP flows to starve. This paper investigates about the CHOKe queue properties in a transient regime and tries to explain the aforementioned discrepancy. A transient regime is defined as the time period of change between two steady states of the queue, initiated as the rate of the unresponsive flow changes. The results derived from the explicit expressions that characterize flow throughputs in transient regimes helps understand a CHOKe and provide ample explanation on its intriguing behavior in the transient regime.
