COMMON ACCESS BETWEEN A MOBILE COMMUNICATIONS NETWORK AND AN EXTERNAL NETWORK WITH SELECTABLE PACKET-SWITCHED AND CIRCUT-SWITCHED AND CIRCUIT-SWITCHED SERVICES

摘要

APPLICATIONS RUNNING ON A MOBILE STATION (12) OR AN EXTERNAL NETWORK ENTITY SUCH AS AN INTERNET SERVICE PROVIDER (56) MAY SPECIFY ON AN INDIVIDUAL APPLICATION FLOW BASIS A REQUESTED QUALITY OF SERVICE. FROM THAT REQUESTED QUALITY OF SERVICE, AN OPTIMAL TYPE OF BEARER TO TRANSFER THE APPLICATION FLOW THROUGH THE MOBILE COMMUNICATIONS NETWORK IS DETERMINED. FOR EXAMPLE, A CIRCUIT-SWITCHED BEARER MAY BE ALLOCATED IF THE REQUEST IS FOR A REAL-TIME SERVICE, AND A PACKET-SWITCHED BEARER MAY BE ALLOCATED IF THE REQUEST IS FOR A NON-REAL TIME TYPE OF SERVICE. VARIOUS OTHER DECISION MAKING CRITERIA MAY BE EMPLOYED. A MOBILE STATION (12) AND A MOBILE NETWORK GATEWAY NODE (54) EACH INCLUDE A MAPPER FOR MAPPING AN INDIVIDUAL APPLICATION FLOW TO ONE OF A CIRCUIT-SWITCHED NETWORK AND A PACKET- SWITCHED NETWORK BEARER DEPENDING ON THE QUALITY OF SERVICE REQUESTED FOR THE INDIVIDUAL APPLICATION FLOW. THE NETWORK LAYER QUALITY OF SERVICE PARAMETERS CORRESPONDING TO AN INDIVIDUAL APPLICATION FLOW ARE MAPPED TO CIRCUIT-SWITCHED BEARER PARAMETERS IF THE APPLICATION FLOW IS MAPPED TO THE CIRCUIT-SWITCHED NETWORK AND TO PACKET-SWITCHED BEARER PARAMETERS IF THE APPLICATION FLOW IS MAPPED TO THE PACKET-SWITCHED NETWORK. THE GATEWAY NODE (54) INCLUDES A COMMON ACCESS SERVER WHICH PERMITS A MOBILE STATION (12) INITIALLY ESTABLISHING A COMMUNICATIONS SESSION WITH AN EXTERNAL NETWORK ENTITY TO PERFORM ONLY A SINGLE, COMMON ACCESS PROCEDURE FOR SUBSEQUENT COMMUNICATIONS USING ONE OF THE CIRCUIT-SWITCHED AND PACKET-SWITCHED NETWORKS. AFTER THAT COMMON ACCESS PROCEDURE IS COMPLETED, SUBSEQUENT APPLICATION FLOWS BETWEEN THE MOBILE STATION (12) AND THE EXTERNAL NETWORK ENTITY ARE ESTABLISHED USING ABBREVIATED PROCEDURES WITHOUT HAVING TO ACCESS THE EXTERNAL NETWORK ENTITY. FIGURE 2