ECN-capable TCP-friendly Layered Multicast Multimedia Delivery

Abstract

ECN-capable TCP-friendly layered multicast multimedia delivery combines explicit congestion notification (ECN) with the TCP-friendly layered multicast scheme. TCP-Friendliness denotes that receiverdriven architecture behaves under congestion like the TCP protocol. Unlike well-known TCP-friendly protocols (TFRC, TFMCC, WEBRC), which use TCP throughput the equation, our system assures TCPfriendliness by emulation. The Receiver emulates TCP congestion control mechanism working with ECN congestion notification. Decisions about changing group membership and, as a result, about changing effective transmission rate, are taken based on TCP emulation. In the paper, a simulation model of ECN-capable multicast multimedia delivery in ns-2 environment is discussed.

Survey on TCP Friendly Congestion Control for Unicast and Multicast Traffic

“…ECN-capable TCP-friendly layered multicast multimedia delivery [21] combines receiver-driven layered architecture (receiver deciding to leave or join a layer to decrease or increase its transmission rate) with explicit congestion notificat ion capable RTP protocol [30] and the TCP-friendly multicast scheme. Unlike other known TCP-friendly protocols which use TCP throughput equation, this scheme assures TCP-friendliness by emulation, here decisions about adapting transmission rate, are taken based on TCP emulation.…”