PQWRR scheduling algorithm in supporting of DiffServ
Jianmin Mao, W. Melody Moh, Bo Wei · 2002
The differentiated services (DiffServ) routers provide per hop behavior (PHBs) to aggregate traffic for different levels of services, the scheduling algorithm used by the DiffServ routers is critical in implementing PHBs. This paper presents a new scheduling scheme, PQWRR that combines existing scheduling schemes, PQ (priority queuing) and WRR (weighted round robin). Our simulation results show that PQWRR provides best delay and jitter performance for EF (expedited forwarding) traffic and at the same time delivers guaranteed bandwidth to AF traffic. PQWRR not only solves the problems of existing PQ and WRR algorithms, but also provides best support for both EF and AF PHBs in the DiffServ domain.