Dual-rate quantum-controlled scheduling
Teck Meng Lim, Bu‐Sung Lee, Chai Kiat Yeo · 2005
Traffic controllers allow a certain amount of traffic bursts to be admitted into a network node. To achieve low delay, these traffic need to request for higher reservation rate on the scheduler rather than their long-term rate. We introduced dual-rate quantum-controlled scheduling (DQS). Instead of overprovisioning of bandwidth, DQS allows real-time flows with controlled traffic bursts to borrow bandwidth from non-real-time flows to achieve low packet delay with bandwidth reserved at their long-term rate. It uses two quantum controller for each real-time queue and a quantum controller for each non-real-time queue to control the amount of service between queues, thus protecting queues from any misbehaving queue and allowing implicit bandwidth borrowing for real-time queues. Through simulations, we showed that DQS is able to provide flow protection against malicious flows, delay differentiation between flows, and a delay that is decoupled from bandwidth allocation for flows that are regulated by traffic controllers like dual token bucket filter.