Quality of Services Based on Routing in IP Networks

Multimedia applications have very stringent Quality of Service (QoS) demands and require a connection oriented service. For these applications, a path satisfying their requirements in terms of bandwidth, delay, buffer etc.The goal of QoS routing algorithms is to find a loop-less path satisfying a given set of constraints on parameters like bandwidth, delay, etc. The path selection process could return either the entire path to the destination or the best next hop for the request.The first case is called as Source routing and the second is referred to as distributed routing, Proposed system uses a new distributed QoS routing algorithm for unicast flows, which has a very low call establishment overhead. QoS routing algorithm makes use of existing IP routing protocols like OSPF, RIP with minimal modifications.