K. Papzis, N.K. Chilamkurti, and B. Soh (Australia)
Multicast, Congestion Control, FQ, PLM.
One of the drawbacks of using PLM (Packet-pair Layered Multicast) protocol is that it only operates in a network that exhibits a Fair Scheduler paradigm, where Fair Queue (FQ) algorithm is implemented in routers that maintain separate queues for packets from each individual source. This gives rise to the complexity of per-flow management, which incurs costs and overheads. To reduce the complexity, we propose in this paper a framework called Stateless Core (SCORE) network architecture for transmission of multicast layers via an integrated PLM/CSFQ (Core Stateless Fair Queueing) packet-pair mechanism. The proposed model reduces the number of routers performing per-flow management, thus reducing costs. We then evaluate the scalability of the integrated PLM/CSFQ queueing mechanism using the NS-2 network simulator. The results from the experiments show that the integrated PLM/CSFQ scales well with the increased number of receivers joining the same session, in terms of being TCP friendly, bandwidth allocation and packet losses sustained.
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