A Streaming Media Service-Based Overlay Network Multipath Routing Scheme

With the rapid development of Internet, a lot of new applications, which have strictdemands on quality of service, have occurred in Internet, such as VolP, network videoconferences, network audio/video broadcast, etc. While the network layer of Internet onlyprovides best-effort transport. It has poor error sufferance, can't provide satisfying QoSfor these applications. Therefore, the overlay network has been proposed to solve thesepractical applications of quality assurance problems.Multipath routing aims to exploit the resources of the underlying physical networkby providing multiple paths between source-destination pairs. Multipath routing has apotential capability to aggregate bandwidth on various paths, and it allows a network tosupport higher data transfer rates than one path routing.A streaming media service-based overlay network multipath routing scheme(SSONM) has been presented in this paper. The scheme takes into account correlationcost between the primary path and other paths. If the primary path has little joins withother paths, the possibility of congestion is lower, the network's performance andutilization can be improved. The scheme finds the overlay path set by flooding, andselects the shortest path as the primary path by combining with the physical networktopology. Then we calculate correlation cost between the primary path and other paths,and choose the multiple paths by the order of correlation cost. According to the multiplepaths set, we can choose all paths or k-paths as the data transmission paths.The scheme is a simple and efficient overlay QoS multi-path strategy. It can achieveless packet loss rate and higher QoS satisfaction rate.