초록 ▼

The present invention is directed to a high speed packet switching network and, in particular to a method and system for minimizing the time to establish a connection between an origin and a destination node. A path calculated at the time the connection is requested is recorded in a Routing Database

The present invention is directed to a high speed packet switching network and, in particular to a method and system for minimizing the time to establish a connection between an origin and a destination node. A path calculated at the time the connection is requested is recorded in a Routing Database and updated each time a modification occurs in the network. Furthermore, alternate paths for supporting non-disruptive path switch on failure or preemption, and new paths towards potential destination nodes can be calculated and stored when the connection set up process is idle. These last operations are executed in background with a low processing priority and in absence of connection request.

대표청구항 ▼

1. A method for establishing a connection between an origin node and a destination node in a packet switching communication network comprising a plurality of nodes interconnected by transmission links, said method comprising the steps of:storing in a routing database possible pre-calculated connecti

1. A method for establishing a connection between an origin node and a destination node in a packet switching communication network comprising a plurality of nodes interconnected by transmission links, said method comprising the steps of:storing in a routing database possible pre-calculated connection paths in the form of stored connection paths with their characteristics; responding to a connection request by determining whether said routing database contains a stored connection path in the routing data base satisfying requirements of the connection request; if a satisfactory stored connection path is found in the routing database, establishing a connection using the stored satisfactory connection path; if a satisfactory stored connection path is not found in the routing database, calculating a new connection path, establishing a connection using the new connection path and storing the new connection path in the routing database; for each connection path stored in the routing database, calculating at least one alternative connection path having transmission links and storing said alternative path in the routing database for possible future use; and periodically recalculating pre-calculated connection paths stored in the routing database.