Patent ID: 6154444
Filing Date: 2000-11-28
Classification: H04L,H04Q

Abstract:
A source routing method for routing a call from a source node through a communication network in which a plurality of nodes are interconnected by communication links, wherein the source node is provided with a route table and a network resource table, said route table storing data of a plurality of routes from each of said nodes to other nodes of the network, and the network resource table storing data of available network resources of said links, the method of said source node comprising the steps of:a) updating the network resource table in response to a first message received from the network whenever there is a change in the available network resources, said first message being flooded through the network to exchange most recent resource data among said nodes;b) updating the network resource table in response to a second message from the network if said change in the available network resources occurs when a connection is being progressively established or already established from said source node, said second message arriving at said source node earlier than said first message;c) fetching a route from said route table in response to a connection setup message from a user terminal;d) comparing a requirement requested by the user terminal with resource data of the fetched route in the network resource table; ande) establishing a connection via the fetched route if the resource data of the fetched route in the network resource table indicates that the fetched route can support said requirement.