A new scalable and efficient packet scheduling method in high-speed packet switch networks

While weighted fair queueing (WFQ) and many other fair scheduling methods can provide guaranteed worst case delay bounds, they are not scalable to a large number of connections due to per-flow queuing. This paper presents a new packet scheduling method-round-robin priority queuing (RRPQ). RRPQ guarantees a per-session-based delay bound without per-flow queuing. It also avoids many other implementation complexities in fair queuing scheduling. The scalability and low implementation cost of RRPQ make it a practical solution in providing guaranteed delay bounds in high-speed networks.