Tree Transmission Protocol for Feedback Distribution in IPTV Systems

Tree Transmission Protocol for Feedback Distribution in IPTV Systems

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IPTV sessions take advantage of the Source-Specific Multicast (SSM) where only one-direction transmission is provided from one source node to all end nodes. In IPTV, video/audio streams are carried using RTP/RTCP protocol. RTCP is mainly used to carry the feedback from end nodes to the source node. The purpose of feedback transmission is to distribute transmission-related statistics among all session nodes. This information is used for session management. However when a large number of end nodes is involved, a central node collecting and distributing the feedback can be overloaded since to much traffic is directed to it. A solution is to spread the feedback collection and distribution over several sub-central nodes. These sub-central nodes process the feedback data and send only the result to a node, which could be another sub-central node or the central node. The paper deals with an organisation of sub-central nodes into a tree structure for feedback transmission. The system for tree organization is based on the Tree Transmission Protocol, which is also introduced in the paper.

IPTV sessions take advantage of the Source-Specific Multicast (SSM) where only one-direction transmission is provided from one source node to all end nodes. In IPTV, video/audio streams are carried using RTP/RTCP protocol. RTCP is mainly used to carry the feedback from end nodes to the source node. The purpose of feedback transmission is to distribute transmission-related statistics among all session nodes. This information is used for session management. However when a large number of end nodes is involved, a central node collecting and distributing the feedback can be overloaded since to much traffic is directed to it. A solution is to spread the feedback collection and distribution over several sub-central nodes. These sub-central nodes process the feedback data and send only the result to a node, which could be another sub-central node or the central node. The paper deals with an organisation of sub-central nodes into a tree structure for feedback transmission. The system for tree organization is based on the Tree Transmission Protocol, which is also introduced in the paper.

Multicast, Source-Specific, Feedback Target, RTP/RTCP, IPTV

Multicast, Source-Specific, Feedback Target, RTP/RTCP, IPTV

KOMOSNÝ, D.; BURGET, R.; NOVOTNÝ, V.

2010

01.09.2008

International Association of Science and Technology for Development

Palma de Mallorca, Spain

978-0-88986-758-1

Proceedings of the Seventh IASTED International Conference on Communication Systems and Networks

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