Optimal Feedback for Quality Source-Adaptive Schemes in Multicast Multi-layered Video Environments

Authors:
Paulo André da Silva Gonçalves;José Ferreira de Rezende;Otto Carlos Muniz Bandeira Duarte;Guy Pujolle
Affiliations:
-;-;-;-
Venue:
NETWORKING '02 Proceedings of the Second International IFIP-TC6 Networking Conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; and Mobile and Wireless Communications
Year:
2002

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Abstract

Current quality source-adaptive schemes for multicast multi-layered video rely on merging capabilities at special nodes in the network as a means of combining feedback from the whole set of receivers. These strategies reduce network load and avoid feedback implosion at the source. In this paper, we examine how to provide optimal feedback for such schemes. The optimal feedback is achieved when state information from the whole set of receivers is represented in every incoming feedback packet at the source. We show that the choice of a suitable merging time window in the intermediate nodes coupled with a periodical transmission of feedback packets by the receivers leads to near-optimal feedback.