Improving Delivery Ratio for Application - Layer Multicast Using IRP

Reliability of tree-like multicast overlays caused by nodes' abrupt failures is considered as one of the major problems for the Internet application-layer media streaming service. The previous technologies have some drawbacks. In this paper, the authors address this problem by designing a distributed and lightweighted protocol named the Instantaneous Reliability oriented Protocol (IRP). This protocol overcome the problems and provides the solution to the problem. IRP reduce the node failures. Unlike most of existing empirical solutions, they first define the overlay reliability problem formally, and propose a protocol containing a node joining algorithm (IRPJoin), a node preemption algorithm (IRP-Preempt), and a node switching algorithm (IRP-Switch) for reactively constructing and repairing the overlay, as well as proactively maintaining the overlay.