An active scheduling paradigm for open adaptive network environments

作者：Hussain SA^*

来源：International Journal of Communication Systems, 2004, 17(5): 491-506.

DOI：10.1002/dac.661

• bandwidth allocation
• active scheduling
• active networks
• queues
• fairness
• delay
• virtual private networks
• agents

Active and programmable networks change the functionality of routers and switches by using agents and active packets. This paper presents a new packet scheduling scheme called Active Scheduling to control and maintain QoS parameters in virtual private networks (VPNs) within the confines of adaptive and programmable networks. In Active Scheduling an agent on the router monitors the accumulated queuing delay for each service. In order to control and to keep the end-to-end delay within the bounds, the weights for services are adjusted dynamically by agents on the routers spanning the VPN. If there is an increase or decrease in queuing delay of a service, an agent on a downstream router informs the upstream routers to adjust the weights of their queues. This keeps the end-to-end delay of services within the specified bounds and offers better QoS compared to VPNs using static WFQ. The paper describes the algorithm for Active Scheduling, and presents simulation results and these are compared with WFQ.

• 出版日期2004-6