Advanced optical fiber communications network

• US 5,880,864 A
• Filed: 05/30/1996
• Issued: 03/09/1999
• Est. Priority Date: 05/30/1996
• 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: Williams, Larry, Burton, William, Little, Dave, Lucas, Amos
• Primary Examiner(s): BACARES, RAFAEL D
• Application Number:
  US08/656,879
• Time in Patent Office: 1,013 Days
• Field of Search: 359/115, 359/118, 359/124, 359/125, 359/164, 359/165, 359/152, 359/167
• US Class Current: 398/71
• CPC Class Codes: H04J 14/0227 Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
• CPC Class Codes: H04J 14/0232 for downstream transmission
• CPC Class Codes: H04J 14/0238 Wavelength allocation for communications one-to-many, e.g. multicasting wavelengths
• CPC Class Codes: H04J 14/0246 using one wavelength per ONU
• CPC Class Codes: H04J 14/0247 Sharing one wavelength for at least a group of ONUs
• CPC Class Codes: H04J 14/025 using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
• CPC Class Codes: H04J 14/0252 Sharing one wavelength for at least a group of ONUs, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
• CPC Class Codes: H04J 14/0282 WDM tree architectures
• CPC Class Codes: H04J 14/0283 WDM ring architectures
• CPC Class Codes: H04L 2012/5605 Fibre
• CPC Class Codes: H04L 2012/561 Star, e.g. cross-connect, concentrator, subscriber group equipment, remote electronics
• CPC Class Codes: H04L 2012/5615 Network termination, e.g. NT1, NT2, PBX
• CPC Class Codes: H04Q 11/0001 using optical switching
• CPC Class Codes: H04Q 11/0435 Details
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections

Abstract

An advanced optical fiber communications network comprises a multimode optical fiber connection (one fiber or two) from a central office to an intelligent interface device in the subscriber'"'"'s premises. The central office includes at least a narrowband switch and a broadband switch. The narrowband switch provides voice grade telephone service routing. The broadband switch provides routing for video services and may comprise an ATM switch, an optical switch or the like. The intelligent interface device provides a connection to the optical fiber and performs two-way wavelength division multiplexing and demultiplexing as well as any necessary signal format conversions. The network has media access control functionality and utilizes a dynamic media access control procedure. The optical fiber loop to the subscriber'"'"'s premises has the capacity to carry at least three different wavelengths. Bandwidth on the optical fiber loop is dynamically allocated to individual services on demand, and the allocation of bandwidth includes wavelength selection as well as bit rate allocation.

Claims

1. A fiber optic communications network comprising:

a telecommunications central office receiving and transmitting communications and information signals;

a plurality of customer premises, each one of said customer premises having;

an intelligent interface device receiving and transmitting said communications and information signals and performing wavelength division multiplexing and demultiplexing of said communications and information signals, and

either one terminal device performing services requiring different bandwidth allocations or a plurality of terminal devices requiring different bandwidth allocations;

a fiber optic transmission path connecting said telecommunications central office to said intelligent interface device in said one customer premises, said telecommunications central office controllably transmitting optical signals corresponding to said communications and information signals to said one customer premises over said fiber optic transmission path and receiving optical signals from said one customer premises over said fiber optic transmission path; and

a plurality of service definition modules in the intelligent interface device of each one of said plurality of customer premises, said service definition modules controlling said wavelength division multiplexing and demultiplexing of said communications and information signals so as to dynamically provide said different bandwidth allocations over said fiber optic transmission path connecting said telecommunications central office to said intelligent interface device in said customer premises.

2. A fiber optics communications network as recited in claim 1, wherein said fiber optic transmission path comprises a single full duplex optical fiber.

3. A fiber optics communications network as recited in claim 1, wherein said fiber optic transmission path comprises two simplex optical fibers.

4. A fiber optics communications network as recited in claim 1, wherein said telecommunications central office comprises a narrowband switch providing voice grade telephone service routing and a broadband switch providing routing for broadband services.

5. A fiber optics communications network as recited in claim 4, wherein said telecommunications central office further comprises an asynchronous transfer mode switch.

6. A fiber optics communications network as recited in claim 5, wherein said telecommunications central office transmits optical service signals containing network identifiers over said fiber optic transmission path;

and

wherein said intelligent interface device receives said optical service signals, converts said optical service signals into electrical signals and delivers the electrical signals to electrical devices in the customer premises in accordance with said network identifiers.

7. A fiber optics communications network as recited in claim 4, wherein said telecommunications central office further comprises an optical switch providing optical signals from an optical network.

8. A fiber optics communications network as recited in claim 1, wherein said optical signals corresponding to said communications and information signals from said telecommunications central office are transmitted simultaneously on at least three different wavelengths and said intelligent interface device contains an optical receiver for receiving at least two of said three different wavelengths.

9. A fiber optics communications network as recited in claim 1, wherein said optical signals corresponding to said communications and information signals from said telecommunications central office are transmitted simultaneously on at least three different wavelengths and said intelligent interface device performs format conversions of said optical signals corresponding to said communications and information signals from said telecommunications central office.

10. A fiber optics communications network as recited in claim 1, wherein the network has media access control functionality and said intelligent interface device performs a dynamic media access control procedure.

11. A fiber optics communications network as recited in claim 10, wherein said dynamic media access control procedure supplies individual services and dynamically provides said different bandwidth allocations upon demand by a customer.

12. A fiber optics communications network as recited in claim 8, wherein said different bandwidth allocations includes the dynamic allocation of said at least two of said three different wavelengths.

13. A fiber optics communications network as recited in claim 12, wherein said dynamic allocation of said at least two of said three different wavelengths is performed upon demand by said customer.

14. A fiber optics communications network as recited in claim 12, wherein said dynamic media access control procedure includes the dynamic allocation of bit rate upon demand by said customer.

15. A fiber optics communications network as recited in claim 1, wherein said network further comprises a SONET fiber optic ring connected to said telecommunications central office and receiving said communications and information signals, said SONET fiber optic ring having a plurality of drop/add fiber hubs, each one of said hubs being connected to at least one intelligent interface device.

16. A fiber optics communications network as recited in claim 10, wherein said intelligent interface device is addressable by said telecommunications central office.

17. A fiber optics communications network as recited in claim 10, wherein said intelligent interface device transmits a bandwidth request signal in response to user inputs.

18. A fiber optics communications network as recited in claim 17, wherein said user inputs are received from a remote control.

19. An intelligent optical interface device comprising:

an optical transmitter and an optical receiver, connected to at least one optical fiber, for two-way conversion between optical and electrical signals;

a media access controller for controlling the optical transmitter and the optical receiver so as to send and receive wavelength division multiplexed optical signals; and

at least one service definition module for controlling said media access controller,

wherein said at least one service definition module is responsive to signalling communications received over said optical fiber for controlling said wavelength dependent multiplexer and demultiplexer in accordance with said signalling communications.

20. An intelligent optical interface device as recited in claim 19, wherein said optical transmitter comprises an array of lasers, each one of said lasers operating at a predetermined wavelength, and wherein said at least one service definition module selects one or more of said lasers in accordance with said signalling communications.

21. An intelligent interface device as recited in claim 19, wherein said media access controller performs a dynamic media access control procedure in response to said signalling communications.

22. An intelligent interface device as recited in claim 21, wherein said dynamic media access control procedure includes the dynamic allocation of individual services upon demand by said customer.

23. An intelligent interface device as recited in claim 19, wherein said media access controller performs a dynamic media access control procedure which includes the dynamic allocation of a plurality of different wavelengths.

24. An intelligent interface device as recited in claim 23, wherein said dynamic allocation of said plurality of different wavelengths is performed upon demand by said customer.

25. An intelligent interface device as recited in claim 21, wherein said dynamic media access control procedure includes the dynamic allocation of bit rate upon demand by said customer.

26. A fiber optics communications network as recited in claim 19, wherein said intelligent interface device is addressable by said telecommunications central office.

27. A fiber optics communications network as recited in claim 19, wherein said intelligent interface device outputs a bandwidth request signal on said at least one optical fiber in response to user inputs.

28. A fiber optics communications network as recited in claim 27, wherein said user inputs are received from a remote control.