Random early detection gateways for congestion avoidance
IEEE/ACM Transactions on Networking (TON)
A control theoretic approach to active queue management
Computer Networks: The International Journal of Computer and Telecommunications Networking
Analysis and design of an adaptive virtual queue (AVQ) algorithm for active queue management
Proceedings of the 2001 conference on Applications, technologies, architectures, and protocols for computer communications
Aggregate traffic performance with active queue management and drop from tail
ACM SIGCOMM Computer Communication Review
Feedback Control of Dynamic Systems
Feedback Control of Dynamic Systems
The BLUE active queue management algorithms
IEEE/ACM Transactions on Networking (TON)
Analysis and design of the virtual rate control algorithm for stabilizing queues in TCP networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Advances in internet congestion control
IEEE Communications Surveys & Tutorials
IEEE Network: The Magazine of Global Internetworking
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Active Queue Management (AQM) is an effective method to enhance congestion control, and to achieve tradeoff between link utilization and delay. The de facto standard, Random Early Detection (RED), and most of its variants use queue length as congestion indicator to trigger packet dropping. As an extension of RED, a novel AQM algorithm, called NPI-RED, is proposed in this paper. The NPI-RED is based on a novel proportional and integral controller, which not only considers the average queue length at the current time slot, but also takes into consideration the past average queue lengths within a round trip time. We provide a guideline for the selection of the feedback gains for TCP/RED system to stabilize the dynamics, make the queue length converge at a certain target and improve the network performance. We present the condition of asymptotic stability for the model in terms of the average queue length, by using a method, in which we construct a Routh table associated with the characteristic polynomial. Based on the stability condition and control gains selection method, the extensive simulation results by ns2 demonstrate that the NPI-RED algorithm outperforms than the existed AQM schemes in robustness, drop probability and stability.