Cellular communication network having intelligent switching nodes

• US 5,577,029 A
• Filed: 05/04/1995
• Issued: 11/19/1996
• Est. Priority Date: 05/04/1995
• Status: Expired due to Term

• Current Assignee: LGC Wireless Incorporated (TE Connectivity Limited)
• Original Assignee: Interwave Communications Incorporated
• Inventors: White, Timothy R., Lu, Priscilla M.
• Primary Examiner(s): Kizou, Hassan
• Application Number:
  US08/435,838
• Time in Patent Office: 565 Days
• Field of Search: 370/54, 370/58.1, 370/58.2, 370/68.1, 370/95.1, 370/95.3, 370/84, 379/59, 379/60, 379/63, 379/220, 455/33.1, 455/54.1, 455/56.1
• US Class Current: 455/445
• CPC Class Codes: H04M 2215/2026 Wireless network, e.g. GSM, PCS, TACS
• CPC Class Codes: H04M 2215/32 Involving wireless systems
• CPC Class Codes: H04W 4/24 Accounting or billing
• CPC Class Codes: H04W 8/082 for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 84/16 WPBX [Wireless Private Branch Exchange]
• CPC Class Codes: H04W 92/20 between access points
• CPC Class Codes: H04W 92/22 between access point controllers

Abstract

An apparatus for cross-connecting an end-to-end connection between an origination mobile station and a destination mobile station in a network of cross-connect nodes, which includes a call control circuit. The call control circuit includes a first circuit portion for receiving call control information from the origination mobile station and the destination mobile station and a second circuit portion for determining, responsive to receiving the call control information from the origination mobile station and the destination mobile station, an optimum end-to-end connection for cross-connecting the end-to-end connection through the network of cross-connect nodes. The optimum end-to-end connection represents a computed shortest communication route between the origination mobile station and the destination mobile station that satisfies resource requirements for cross-connecting the end-to-end connection.

Claims

1. In a system having a plurality of cross-connect nodes for facilitating cellular communication among a plurality of mobile stations, a method of cross-connecting an end-to-end connection between an origination mobile station and a destination mobile station, comprising:

receiving call control information from said origination mobile station;

receiving call control information from said destination mobile station;

computing, responsive to said call control information received from said origination mobile station and said call control information received from said destination mobile station, an optimum end-to-end connection for cross-connecting said end-to-end connection, said optimum end-to-end connection having a first optimum cross connect point and representing a computed shortest communication route between said origination mobile station and said destination mobile station that satisfies resource requirements for cross-connecting said end-to-end connection; and

cross-connecting said end-to-end connection through said first optimum cross-connect point, including;

determining whether said first optimum cross-connect point has on node resources to satisfy said resource requirements for cross-connecting said end-to-end connection; and

if said first optimum cross-connect point has on node said resources to satisfy said resource requirements for cross-connecting said end-to-end connection, cross-connecting said end-to-end connection along said optimum end-to-end connection using said first optimum cross connect point as a connection cross-connect point.

2. The method of claim 1 wherein said step of cross-connecting said end-to-end connection through said first optimum cross-connect point further comprising:

determining, if said first optimum cross-connect point does not have on node said resources to satisfy said resource requirements for cross-connecting said end-to-end connection, whether said resource requirements for cross-connecting said end-to-end connection are satisfied by a usage of resources at nodes downstream from said first optimum cross-connect point; and

if said first optimum cross-connect point does not have on node said resources to satisfy said resource requirements for cross-connecting said end-to-end connection and said resource requirements for cross-connecting said end-to-end connection are satisfied by said usage of resources at nodes downstream from said first optimum cross-connect point, cross-connecting using resources available at said nodes downstream from said first optimum cross-connect point said end-to-end connection, and using said first optimum cross connect point as a connection cross-connect point.

3. The method of claim 2 wherein said step of determining whether resources requirements for cross-connecting said end-to-end connection satisfied by said usage of resources at nodes downstream from said first optimum cross-connect point comprises the step of checking resourses on nodes in an incoming call path between said destination mobile station and said first optimum cross connect point prior to checking resourses on nodes in an outgoing call path between said origination mobile station and said first optimum cross connect point.

4. The method of claim 2 wherein said step of cross-connecting said end-to-end connection through said first optimum cross-connect point further comprising:

designating an upstream node from said first optimum cross-connect point a second optimum cross-connect point if resource requirements for cross-connecting said end-to-end connection are not satisfied by said usage of resources at nodes downstream from said first optimum cross-connect point and a usage of resources at said first optimum cross-connect point;

determining whether a usage of resources at said second optimum cross-connect point satisfies said resource requirements for cross-connecting said end-to-end connection; and

cross-connecting, using said second optimum cross-connect point as a connection cross-connect point and using resources available at said second optimum cross-connect point, an outgoing call path from said origination mobile station with an incoming call path to said destination mobile station, if said usage of resources in said second optimum cross-connect point satisfies said resource requirements for cross-connecting said end-to-end connection.

5. The method of claim 4 wherein said resources comprises rate conversion resources.

6. An apparatus for cross-connecting an end-to-end connection between an origination mobile station and a destination mobile station in a network of cross-connect nodes, comprising:

a call control circuit including;

a first circuit portion for receiving call control information from said origination mobile station and said destination mobile station; and

a second circuit portion for determining, responsive to receiving said call control information from said origination mobile station and said destination mobile station, an optimum end-to-end connection for cross-connecting said end-to-end connection through said network of cross-connect nodes, said optimum end-to-end connection representing a computed shortest communication route between said origination mobile station and said destination mobile station that satisfies resource requirements for cross-connecting said end-to-end connection.

7. The apparatus of claim 6 wherein said resource requirements for cross-connecting said end-to-end connection include a transcoder rate adapter unit.

8. The apparatus of claim 6 wherein said network of cross-connect nodes comprises a mobile-services switching center, a base station controller, and a base transceiver station.

9. The apparatus of claim 8 wherein each of said cross-connect nodes includes circuitry for checking resource availability downstream of said each of said cross-connect node.

10. The apparatus of claim 9 wherein each of said cross-connect nodes further includes circuitry for checking resource availability upstream of said each of said cross-connect node.

11. The apparatus of claim 10 wherein said resource requirements for cross-connecting said end-to-end connection include a transcoder rate adapter unit.

12. An apparatus for facilitating cellular communication between an origination mobile station and a destination mobile station, comprising:

a mobile services switching center, said mobile services center having a first switching circuit for performing connection cross-connects for calls between said origination mobile station and said destination mobile station;

a call control circuit coupled to said mobile services switching center, said call control circuit receiving call control information from said origination mobile station and said destination mobile station, said call control information from said origination mobile station comprises a rate at which said origination mobile station communicates and said control information from said destination mobile station comprises a rate at which said destination mobile station communicates;

a base station controller coupled to said mobile services switching center, said base station controller having a second switching circuit for performing connection cross-connects for calls between said origination mobile station and said destination mobile station; and

a base transceiver station coupled to said base station controller, said base transceiver station having a third switching circuit for performing connection cross-connects for calls between said origination mobile station and said destination mobile station, wherein said call control circuit determines, responsive to said call control information received from said origination mobile station and said destination mobile station, at which of said mobile services switching center, base station controller, and base transceiver station an optimum cross connect point for cross-connecting an end-to-end connection between said origination mobile station and said destination mobile station resides.

13. The apparatus of claim 12 wherein each of said mobile services switching center, base station controller, and base transceiver station includes a circuit for switching in resources required for cross-connecting said end-to-end connection between said origination mobile station and said destination mobile station.

14. The apparatus of claim 13 further comprising a topology information database, wherein said optimum cross connect point is determined based on data in said topology information database.

15. The apparatus of claim 14 wherein said origination mobile station and said destination mobile station communicate using a Global Systems for Mobile Communication protocol.

16. An apparatus for cross-connecting an end-to-end connection between an origination mobile station and a destination mobile station via a network of cross-connect nodes, comprising:

means for receiving call control information relating to said origination mobile station and said destination mobile station, said call control information from said origination mobile station comprises a rate at which said origination mobile station communicates and said control information from said destination mobile station comprises a rate at which said destination mobile station communicates; and

means for determining, responsive to said call control information from said origination mobile station and said destination mobile station, an optimum end-to-end connection, said optimum end-to-end connection representing a computed shortest route through said cross-connect nodes for properly cross-connecting said end-to-end connection between said origination mobile station and said destination mobile station.

17. The apparatus of claim 16 wherein said origination mobile station and said destination mobile station communicate using a Global Systems for Mobile Communication protocol.