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Method and system for minimizing the connection set up time in high speed packet switching networks

  • US 6,400,681 B1
  • Filed: 04/01/1997
  • Issued: 06/04/2002
  • Est. Priority Date: 06/20/1996
  • Status: Expired due to Term
First Claim
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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.

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