Telecommunications system with wide area internetwork control

• US 6,195,425 B1
• Filed: 11/21/1996
• Issued: 02/27/2001
• Est. Priority Date: 11/21/1996
• Status: Expired due to Term

• Current Assignee: Verizon Patent and Licensing Incorporated (Verizon Communications Inc.)
• Original Assignee: Bell Atlantic Network Services, Inc. (Verizon Communications Inc.)
• Inventors: Farris, Robert D.
• Primary Examiner(s): Hong, Harry S.
• Application Number:
  US08/753,198
• Time in Patent Office: 1,559 Days
• Field of Search: 379/112, 379/201, 379/207, 379/219, 379/220, 379/224, 379/229, 379/230, 379/900, 370/384, 370/385, 370/522, 370/401, 370/467, 370/496
• US Class Current: 379/230
• CPC Class Codes: H04M 7/00 Arrangements for interconnection between switching centres
• CPC Class Codes: H04M 7/126 Interworking of session control protocols
• CPC Class Codes: H04M 7/128 Details of addressing, directories or routing tables
• CPC Class Codes: H04M 7/1295 Details of dual tone multiple frequency signalling
• CPC Class Codes: H04Q 3/0025 Provisions for signalling
• CPC Class Codes: H04Q 3/0045 involving hybrid, i.e. a mixture of public and private, or multi-vendor systems
• CPC Class Codes: Y10S 379/90 Internet, e.g. Internet phone, webphone, internet-based telephony

Abstract

A communications system including multiple telecommunications networks having common channel signaling hardware is controlled by a hybrid or combination of common channel interoffice signaling (CCIS) system with a data internetwork to link the signaling points in the telecommunications network via the new hybrid common channel interoffice switching system. Preferably the internetwork comprises the Internet. The internet is used to link signal switching points, signal transfer points, and a signal control point. The signal control point is preferably hierarchical and distributed so as to provide ample power and capacity to supply signal control for multiple telecommunications networks of related or unrelated operating companies. It is an important feature of the invention that multiple telecommunications networks may be controlled from a central control point by using a hybrid form of common channel signaling in which signaling points in the telecommunications networks operate with signaling protocols for which they are presently designed while the control signaling between signaling points is transported by pre-existing internetwork signals using a different protocol for which the internetwork is designed.

Claims

1. A method of controlling a switched telephone network by common channel interoffice signaling comprising:

receiving and originating at a control point telephone network control signals having a first protocol;

receiving and originating at a service switching point telephone network control signals having said first protocol; and

transporting said telephone network control signals between said control point and said service switching point over a public wide area packet switched network using a second protocol and wherein said public wide area packet switched network also transports data communications independent of telephone network control signals;

wherein said wide area packet switched network comprises the Internet.

2. A method according to claim 1 wherein said second protocol is the same protocol as used by said public wide area packet switched network for third party communications therethrough unrelated to said switched telecommunications network.

3. A method according to claim 1 wherein at least certain of said telephone network control signals comprise call set up and tear down signals.

4. A method according to claim 1 wherein at least certain of said telephone network control signals comprise transaction capability application part protocol messages.

5. A method of controlling a switched telephone network by common channel interoffice signaling comprising:

receiving and originating at a control point telephone network control signals;

receiving and originating at a service switching point telephone network control signals; and

transporting said telephone network control signals between said service switching point and said control point over a public wide area packet switched network using a protocol different from any protocol used for said telephone network control signals and wherein said public wide area packet switched network also transports data communications independent of telephone network control signals;

wherein said public wide area packet switched network comprises the Internet.

6. A method according to claim 5 wherein at least certain of said telephone network control signals received at said service control point comprise transaction capability application part protocol messages.

7. A method according to claim 6 wherein at least certain of said telephone network control signals originated by and received at said service switching points comprise call set up and tear down messages.

8. A method according to claim 6 wherein said protocol used to transport said network control signals over said public wide area packet switched network is the same as the protocol used by said network to transport third party messages unrelated to said telecommunications network.

9. A method according to claim 8 wherein said protocol used to transport said network control signals over said public wide area packet switched network comprises TCP/IP.

10. A method according to claim 8 wherein said network control signals use SS7 protocol.

11. A method according to claim 5 wherein said network control signals originated and received at said service switching point and said network control signals originated and received at said signal transfer point and said signals originated and received at said service control point are transported via said public wide area packet switched network using a protocol different from any protocol used for said telephone network control signals using a protocol different from any protocol used for said telephone network control signals.

12. A communication system comprising:

a switched telecommunications network having an advanced intelligent network control system, said switched telecommunications network including switching systems connected by trunks;

said advanced intelligent network control system including service switching points associated with said switching systems, said service switching points originating and receiving control messages, and a service control point also originating and receiving control messages, said messages using a first protocol for controlling said switched telecommunications network; and

a public wide area packet switched data network linking a plurality of geographically distributed interfaces for transport of data communications between said interfaces using a second protocol, as well as transport of data communications independent of said switched telecommunications network;

wherein communication of said messages to and from said service switching points uses said first protocol and is transported via said public wide area packet switched network using said second protocol; and

wherein said public wide area packet switched data network comprises the Internet.

13. A communication system according to claim 12 wherein transport of data communications between said interfaces to said public wide area packet switched data network includes call set up and tear down messages.

14. A communication system according to claim 12 including one or more signal transfer points connected between said service control point and said service switching points.

15. A communication system according to claim 14 wherein transport of data communications between said interfaces to said public wide area packet switched data network includes call set up and tear down messages to and from said service switching points and said signal transfer point.

16. A communication system comprising:

a switched telephone network including service switching points linked to subscriber stations, said service switching points being interconnected by trunks for voice communication between subscriber stations, said service switching points being further interconnected by a signaling network operating through a signaling protocol for establishing voice communication connection;

a control node for controlling an operation of said switched telephone network through signaling between said control node and at least one of said service switching points using said signaling protocol; and

a public wide area packet switched network for transporting data, including data communications independent of said switched telephone network, said public wide area packet switched network linking a plurality of geographically distributed interfaces thereto for transport of communications between said interfaces using a transport protocol, said control node being interconnected to said public wide area packet switched network through a first one of said interfaces, said signaling network being interconnected to said public wide area packet switched network through at least a second one of said interfaces;

wherein signaling between said control node and said service switching points using said signaling protocol is transported via said public wide area packet switched network using said transport protocol;

wherein said public wide packet switched network is the Internet.

17. A communications system according to claim 16 wherein said control node comprises a service control point.

18. A communication system according to claim 17, further comprising a signal transfer point connected between said service control point and said at least one service switching points.

19. A communication system according to claim 18 wherein said signaling to said service control point includes transaction capability application part protocol messages.

20. A communication system according to claim 16 wherein said signaling protocol is SS7 and said transport protocol is TCP/IP.

21. A method of controlling a switched telephone network by common channel interoffice signaling comprising the steps of:

originating at a service switching point in said network a first signaling message in a signaling protocol;

transporting said first signaling message to a service control point in said network through the Internet using an Internet transport protocol;

in response to receipt of said first signaling message at said service control point, originating a second signaling message for a designated destination service switching point;

transporting said second signaling message from said service control point through the Internet, using the Internet transport protocol, to said designated service switching point.