US 6,983,329 B1
Method for reducing signaling in an telecommunications network by arranging gatekeepers in a hierarchical structure
Espen Skjæran, Oslo (Norway); and Espen Iveland, Drammen (Norway)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (Sweden)
Filed on Oct. 03, 2000, as Appl. No. 9/677,815.
Claims priority of application No. 1999-4828 (NO), filed on Oct. 04, 1999.
Int. Cl. G06F 15/173 (2006.01); G06F 13/00 (2006.01); H04L 12/28 (2006.01)
U.S. Cl. 709—238 5 Claims
OG exemplary drawing
 
1. Method for establishing a connection between a calling party and a called party in a H.323 network wherein gatekeepers are arranged in a hierarchical manner, the method comprising:
receiving by a first gatekeeper a Set-up command issued from a connected calling user,
performing a user location algorithm by said first gatekeeper on its locally attached users,
if this algorithm fails, sending a Location Request message to its lower level gatekeepers, wherein each lower level gatekeeper performs a user location algorithm on its attached users and lower level gatekeepers,
if these user location algorithms fail, sending a Location Request message to its higher level gatekeeper, which performs a user location algorithm on its attached users and gatekeepers except the originating gatekeeper,
if one of the user location algorithms succeeds, the gatekeeper concerned sending a Location Confirm message to the first gatekeeper,
the first gatekeeper sending a Set-up message to the gatekeeper which has issued the Location Confirm message, which gatekeeper forwards said Set-up message to the called user, whereupon said connection is established.