QoS-Aware Multicasting in DiffServ Domains

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Although many QoS-based multicast routing protocols have been proposed in recent years, most of them are based on per-flow resource reservation, which cannot be deployed within differentiated services (DiffServ) domains. This paper proposes a new QoS-aware multicast routing protocol called QMD, which is designed for DiffServ environments. QMD can provide scalable QoS-aware multicast services while greatly alleviating the core routers multicast routing burden. In QMD, the authors separate the control and data forwarding functions.