System and method for connecting calls with a time division multiplex matrix

• US 20030053451A1
• Filed: 10/29/2002
• Published: 03/20/2003
• Est. Priority Date: 12/22/1998
• Status: Active Grant

• Current Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Original Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Inventors: Medhat, Khalid Mohamed
• Granted Patent: US 6,763,027 B2
• Time in Patent Office: Days
• US Class Current: 370/357
• CPC Class Codes: H04L 12/5601 Transfer mode dependent, e.g. ATM
• CPC Class Codes: H04L 12/5602 Bandwidth control in ATM Networks, e.g. leaky bucket
• CPC Class Codes: H04L 2012/5618 Bridges, gateways [GW] or interworking units [IWU]
• CPC Class Codes: H04L 2012/563 Signalling, e.g. protocols, reference model
• CPC Class Codes: H04L 47/12 Avoiding congestion; Recovering from congestion
• CPC Class Codes: H04L 49/606 Hybrid ATM switches, e.g. ATM&STM, ATM&Frame Relay or ATM&IP
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections
• CPC Class Codes: H04Q 2213/13106 Microprocessor, CPU
• CPC Class Codes: H04Q 2213/13176 Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/1319 Amplifier, attenuation circuit, echo suppressor
• CPC Class Codes: H04Q 2213/13196 Connection circuit/link/trunk/junction, bridge, router, gateway
• CPC Class Codes: H04Q 2213/13292 Time division multiplexing, TDM
• CPC Class Codes: H04Q 3/0025 Provisions for signalling

Abstract

A system and method for connecting a call includes a signaling processor adapted to receive and process call signaling to select connections for a call. The signaling processor transmits control messages designating the selected connections. A controllable time division multiplex matrix receives control messages from the signaling processor and, in response to the control messages, makes connections for the call. The system and method may include an interworking unit that receives control messages from the signaling processor and, in response to the control messages, interworks the calls to selected connections. The system and method may include an asynchronous transfer mode matrix that receives control messages from the signaling processor and, in response to the control messages, connects the calls to selected connections.

Claims

1. A system for connecting a call having user communications and call signaling, the system comprising:

a signaling processor configured to receive the call signaling indicating a first connection, process the call signaling to select a second connection, transmit a first control message indicating the first connection and the second connection, and transmit a second control message indicating the second connection;

a controllable time division multiplex matrix configured to receive the user communications over the first connection, receive the first control message, and connect the user communications to the second connection based on the first control message; and

a first interworking unit configured to receive the second control message, receive the user communications over the second connection, interwork the user communications from a time division multiplexing format to an asynchronous format based on the second control message, and transmit the user communications in the asynchronous format.

2. The system of claim 1 wherein the asynchronous format comprises asynchronous transfer mode format.

3. The system of claim 2 wherein the signaling processor is configured to transmit a third control message and the system further comprises an asynchronous transfer mode matrix configured to receive the user communications in the asynchronous format, receive the third control message, and transmit the user communications based on the third control message.

4. The system of claim 1 further comprising a second interworking unit configured to receive the user communications from the controllable time division multiplex matrix and to interwork the user communications from the time division multiplexing format to the asynchronous format.

5. The system of claim 1 wherein the call signaling comprises Signaling System 7 messages.

6. The system of claim 1 wherein the call signaling comprises an initial address message.

7. The system of claim 1 wherein the signaling processor is configured to select a third connection and transmit a third control message designating the third connection and the system further comprises a digital signal processor configured to receive the user communications over the third connection, receive the third control message, process the user communications based on the third control message, and transmit the user communications based on the third control message.

8. The system of claim 7 wherein the digital signal processor resides within the controllable time division multiplex matrix.

9. The system of claim 7 wherein the digital signal processor resides within the first interworking unit.

10. The system of claim 7 wherein the digital signal processor resides between the controllable time division multiplex matrix and the first interworking unit.

11. The system of claim 7 wherein the digital signal processor is configured to provide echo control for the user communications.

12. The system of claim 7 wherein the digital signal processor is configured to provide compression for the user communications.

13. The system of claim 7 wherein the digital signal processor is configured to provide encryption for the user communications.

14. A method for connecting a call having user communications and call signaling comprising:

in a signaling processor, receiving the call signaling indicating a first connection, processing the call signaling to select a second connection, transmitting a first control message indicating the first connection from the signal processor, and transmitting a second control message designating the second connection from the signal processor;

in a controllable time division multiplex matrix, receiving the user communications over the first connection, receiving the first control message from the signaling processor, and connecting the user communications to the second connection based on the first control message; and

in a first interworking unit, receiving the second control message, receiving the user communications over the second connection, interworking the user communications from a time division multiplexing format to an asynchronous format based on the second control message, and transmitting the user communications in the asynchronous format.

15. The method of claim 14 wherein the asynchronous format comprises an asynchronous transfer mode format.

16. The method of claim 15 further comprising:

in the signaling processor, transmitting a third control message to an asynchronous transfer mode matrix; and

in the asynchronous transfer mode matrix, receiving the user communications in the asynchronous format, receiving the third control message from the signaling processor, and transmitting the user communications based on the third control message.

17. The method of claim 14 further comprising, in a second interworking unit, receiving the user communications from the controllable time division mutiplex matrix and interworking the user communications from the time division multiplexing format to the asynchronous format.

18. The method of claim 14 wherein receiving the call signaling comprising receiving Signaling System 7 messages.

19. The method of claim 14 wherein receiving the call signaling comprising receiving initial address messages.

20. The method of claim 14 further comprising:

in the signaling processor, transmitting a third control message to a digital signal processor; and

in the digital signal processor, receiving the user communications, receiving the third control message from the signaling processor, processing the user communications based on the third control message, and transmitting the user communications based on the third control message.

21. The method of claim 20 wherein processing the user communications comprises processing the user communications within the controllable time division multiplex matrix.

22. The method of claim 20 wherein processing the user communications comprises processing the user communications within the interworking unit.

23. The method of claim 20 wherein processing the user communications comprises applying echo control for the user communications.

24. The method of claim 20 wherein processing the user communications comprises applying compression for the user communications.

25. The method of claim 20 wherein processing the user communications comprises applying encryption for the user communications.