CALL ROUTING METHOD FOR 3G.IP NETWORKS

摘要

A method in a 3G.IP network of routing a call from an originating subscriber (85) in an originating network (71) to a mobile terminating subscriber roaming in a visited network (79), the mobile terminating subscriber having a home network (76) that maintains location information for the mobile terminating subscriber. When the originating subscriber (85) sends a call origination message to a gatekeeper (72) in the originating network (71), the gatekeeper (72) obtains location information from the home network (76) for the mobile terminating subscriber. An IP address of a media gateway (81) in the visited network (79)(MGW1) is then obtained and provided to a media gateway (75) in the originating network (71)(MGW2). The IP address of MGW2 (75) is then sent to the originating subscriber. Thereafter, the call is routed from the originating subscriber through MGW2 (75) in the originating network (71) directly to MGW1 (81) in the visited network (79). An MSC Server (82) in the visited network (79) then routes the call to the mobile terminating subscriber.