Communications switching architecture

• US 7,035,289 B2
• Filed: 05/02/2003
• Issued: 04/25/2006
• Est. Priority Date: 05/03/2002
• Status: Active Grant

• Current Assignee: Genband US LLC (Ribbon Communications, Inc.)
• Original Assignee: Cedar Point Communications Incorporated
• Inventors: Miller, Paul, Quigley, Patrick, English, Daniel W., Devine, Geoffrey, Doucette, John, Fitzgerald, Jeffrey J.
• Primary Examiner(s): QURESHI, AFSAR M
• Application Number:
  US10/428,593
• Publication Number:
  US 20040008724A1
• Time in Patent Office: 1,089 Days
• Field of Search: 370/216, 370/401, 370/408, 370/465, 370/467, 370/352, 370/493, 370/471, 370/476, 370/477, 370/390, 370/353, 370/360, 704/270.1
• US Class Current: 370/493
• CPC Class Codes: H04J 3/16 in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted H04J3/17, H04J3/24 take precedence
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 2012/6459 Multiplexing, e.g. TDMA, CDMA
• CPC Class Codes: H04L 2012/6475 N-ISDN, Public Switched Telephone Network [PSTN]
• CPC Class Codes: H04L 2012/6489 Buffer Management, Threshold setting, Scheduling, Shaping
• CPC Class Codes: H04M 7/0003 Interconnection between telephone networks and data networks
• CPC Class Codes: H04M 7/0075 Details of addressing, directories or routing tables
• CPC Class Codes: H04M 7/0078 Security; Fraud detection; Fraud prevention
• CPC Class Codes: H04M 7/1215 where a cable TV network is used as an access to the PSTN/ISDN
• CPC Class Codes: H04M 7/128 Details of addressing, directories or routing tables

Abstract

Presently described is a system and method for switching multimedia data communications, including but not limited to Voice over IP (VoIP) telephony, cable TV, digital audio and video. The system utilizes a single, integrated device to provide all PacketCable-compliant functionality, including enhanced user privacy, compliance with CALEA, E911 and other mandated services not available in conventional distributed PacketCable systems. High speed and efficient, low cost operation are provided by means of an optimized data unit encapsulation scheme for internal switching and routing. A proprietary fiber optic backplane and removable optical connectors are used to enable lightspeed internal communications hot-swapping of components. Furthermore, the present system is extensible to all forms of digital data switching and is secure, resistant to Denial of Service attacks, and fault-resilient.

Claims

1. A method of media data switching, comprising:

receiving a plurality of media data units at an ingress port;

determining a corresponding egress port for each of said plurality of media data units based on the type of each said media data unit;

reformatting one or more said media data unit into a low-overhead encapsulated packet;

directing each said encapsulated packet toward said corresponding egress port, wherein said directing uses direct fiber optic interconnections;

at each said egress port, receiving and reformatting said encapsulated packets into a second plurality of media data units; and

transmitting said second plurality of media data units to complete said media data switching under the control of a single element management system.

2. The method of claim 1, wherein said media data units comprise audio data.

3. The method of claim 1, wherein said media data units comprise video data.

4. The method of claim 1, wherein said media data units comprise television signals in digital form.

5. The method of claim 1, wherein said determining further comprises securely processing said media data units.

6. The method of claim 5, wherein said securely processing further comprises concealing the IP addresses of the transmitting party from the receiving party and concealing the IP addresses of the receiving party from the transmitting party.

7. The method of claim 5, wherein said securely processing further comprises providing CALEA services undetectable to either the transmitting or receiving parties.

8. The method of claim 1, wherein said determining is based in part on the type of media data in each said media data unit.

9. The method of claim 1, wherein said determining further comprises queuing said media data units using high-granularity, class-based queues to provide protection from Denial of Service attacks.

10. The method of claim 9, wherein said queuing employs a plurality of queues for each class of service.

11. The method of claim 1, wherein said directing occurs in real-time.

12. A method of cable media switching, comprising:

receiving data at an ingress port;

reformatting said data into a plurality of low-overhead units;

switching said plurality of low-overhead units to one or more egress ports, based in part on said reformatting, wherein said switching uses direct fiber optic interconnections;

reformatting said encapsulated packets into second data; and

transmitting said second data to complete said cable media switching, wherein said cable media switching is performed under the control of a single element management system.

13. An apparatus for integrated media switching comprising:

a plurality of ingress ports each receiving a plurality of media data units;

a processor connected, comprising means for;

determining a corresponding egress port for each of said plurality of media data units based on the type of each said media data unit; and

reformatting one or more said media data unit into a low-overhead encapsulated packet;

a plurality of egress ports, comprising means for receiving and reformatting said encapsulated packets into a second plurality of media data units; and

means for transmitting said second plurality of media data units to complete said media switching under the control of a single element management system,

wherein said ingress ports, said processor, and said egress ports are operably connected to each other with a fiber optic backplane.

14. The apparatus of claim 13, wherein said ingress ports, said processor, said egress ports, and said backplane are provided in a single chassis.

15. The apparatus of claim 13, wherein said processor further comprises high-granularity, class-based queues of said media data units constituted to provide protection from Denial of Service attacks.

16. A computer system for use in media data switching, comprising computer instructions for:

receiving a plurality of media data units at an ingress port;

determining a corresponding egress port for each of said plurality of media data units based on the type of each said media data unit;

reformatting one or more said media data unit into a low-overhead encapsulated packet;

directing each said encapsulated packet toward said corresponding egress port, wherein said directing uses direct fiber optic interconnections;

at each said egress port, receiving and reformatting said encapsulated packets into a second plurality of media data units; and

transmitting said second plurality of media data units to complete said media data switching under the control of a single element management system.

17. A computer-readable medium storing a computer program executable by a plurality of server computers, the computer program comprising computer instructions for:

receiving a plurality of media data units at an ingress port;

determining a corresponding egress port for each of said plurality of media data units based on the type of each said media data unit;

reformatting one or more said media data unit into a low-overhead encapsulated packet;

directing each said encapsulated packet toward said corresponding egress port, wherein said directing uses direct fiber optic interconnections;

at each said egress port, receiving and reformatting said encapsulated packets into a second plurality of media data units; and

transmitting said second plurality of media data units to complete said media data switching under the control of a single element management system.

18. A computer data signal embodied in a carrier wave, comprising computer instructions for:

receiving a plurality of media data units at an ingress port;

determining a corresponding egress port for each of said plurality of media data units based on the type of each said media data unit;

reformatting one or more said media data unit into a low-overhead encapsulated packet;

directing each said encapsulated packet toward said corresponding egress port, wherein said directing uses direct fiber optic interconnections;

at each said egress port, receiving and reformatting said encapsulated packets into a second plurality of media data units; and

transmitting said second plurality of media data units to complete said media data switching under the control of a single element management system.