Introduction to algorithms
Heterogeneous Multicast in Heterogeneous QoS Networks
ICON '01 Proceedings of the 9th IEEE International Conference on Networks
A Scalable Protocol for Member Join/Leave in DiffServ Multicast
LCN '01 Proceedings of the 26th Annual IEEE Conference on Local Computer Networks
Video multicast over the Internet
IEEE Network: The Magazine of Global Internetworking
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A scalable quality-of-service (QoS) mechanism, termed harmonic DiffServ, is presented in this paper for supporting many-to-many heterogeneous-QoS multicasts in the DiffServ networks. In principle, it restricts data to be distributed using a limited number of multicast addresses (channels). In order to differentiate traffic with different QoS within a multicast channel, a small number of undefined DS codepoints (DSCP) are reserved for marking packets, and dynamic associations between DSCPs and service types are maintained in output ports of routers. We show that with proper arrangement on the usage of small numbers of multicast addresses and DSCPs, the forwarding information can be effectively shared among senders, which in turn significantly improves the system scalability.