Optical communication systems, optical communication system terminal facilities, optical communication methods, and methods of communicating within an optical network

• US 6,798,991 B1
• Filed: 10/29/1999
• Issued: 09/28/2004
• Est. Priority Date: 10/29/1999
• Status: Expired due to Term

• Current Assignee: Ciena Corporation
• Original Assignee: MCI Incorporated (Verizon Communications Inc.)
• Inventors: Russ, Will, Robinson, Niall, Davis, Gary B.
• Primary Examiner(s): Pascal, Leslie
• Assistant Examiner(s): SINGH, DALZID E
• Application Number:
  US09/430,095
• Time in Patent Office: 1,796 Days
• Field of Search: 359/110, 359/117, 359/128, 359/139, 398/9, 398/13, 398/19, 398/20, 398/46, 398/50, 398/49, 398/56, 398/57, 398/12
• US Class Current: 398/19
• 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 14/0241 Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
• CPC Class Codes: H04J 14/0283 WDM ring architectures
• CPC Class Codes: H04J 14/0294 Dedicated protection at the optical channel (1+1)
• CPC Class Codes: H04J 14/0295 Shared protection at the optical channel (1:1, n:m)
• CPC Class Codes: H04J 14/0297 Optical equipment protection

Abstract

Optical communication systems, terminal facilities of an optical communication system, optical communication methods, and methods of communicating within an optical network are provided. According to one aspect of the invention, an optical communication system includes: a plurality of optical communication conduits individually configured to communicate data communication signals; an optical switch adapted to optically couple a communication path of an associated data terminal with at least one of the optical communication conduits; and a controller configured to monitor the data communication signals and to control the optical switch responsive to the monitoring of the data communication signals.

Claims

1. An optical communication system comprising:

a plurality of optical communication conduits individually configured to communicate data signals;

an optical switch adapted to optically couple a communication path of an associated data terminal with one of the plurality of optical communication conduits;

a first controller coupled to the optical switch for controlling the optical switch; and

a second controller configured to monitor communication of the data signals, to select one of the plurality of the optical communication conduits based on the monitoring, and to instruct the first controller to control the optical switch to couple to the selected optical communication conduit.

2. The system according to claim 1 further comprising circuitry configured to convert the data signals intermediate an electrical domain and an optical domain.

3. The system according to claim 2 wherein the circuitry comprises a plurality of equipment protection devices.

4. The system according to claim 3 wherein at least one of the equipment protection devices is provided within the optical switch.

5. The system according to claim 2 wherein the optical switch includes a plurality of data terminal ports and a plurality of network ports, and the circuitry is coupled with the data terminal ports and the network ports.

6. The system according to claim 1 further comprising an adaptive light regenerating equipment LRE device coupled with the optical switch and at least one of the optical communication conduits.

7. The system according to claim 1 wherein the optical switch comprises a plurality of synchronized optical core matrix switches.

8. The system according to claim 1 wherein the optical communication conduits comprise a working conduit and a protect conduit.

9. The system according to claim 1 wherein the optical switch comprises an optical cross-connect switch.

10. An optical communication system terminal facility comprising:

circuitry configured to convert data signals intermediate an electrical domain and an optical domain, the circuitry optically coupling to an optical switch interfacing with a plurality of optical communication conduits individually configured to communicate data signals provided in the optical domain; and

a controller configured to monitor communication of the data signals, to select one of the plurality of the optical communication conduits based on the monitoring, and to instruct an optical switch controller to control the optical switch to couple to the selected optical communication conduit.

11. The terminal facility according to claim 10 further comprising a data terminal and the circuitry is provided within the data terminal.

12. The terminal facility according to claim 10 wherein the circuitry comprises a plurality of equipment protection devices.

13. The terminal facility according to claim 10 further comprising an equipment protection device within the optical switch.

14. The terminal facility according to claim 10 wherein the optical switch includes a plurality of data terminal ports and a plurality of network ports, and the circuitry is coupled with the data terminal ports and the network ports.

15. The terminal facility according to claim 10 further comprising an adaptive light regenerating equipment LRE device coupled with the optical switch and at least one of the optical communication conduits.

16. The terminal facility according to claim 10 wherein the optical switch comprises an optical cross-connect switch.

17. An optical communication method comprising:

converting data signals from an optical switch intermediate an electrical domain and an optical domain, wherein the optical switch is coupled to a plurality of optical communication conduits individually configured to communicate data signals provided in the optical domain;

monitoring communication of the data signals;

selecting, by a first controller, one of the plurality of the optical communication conduits based on the monitoring; and

instructing by the first controller to a second controller for controlling the optical switch to couple to the selected optical communication conduit.

18. The method according to claim 17 further comprising communicating the data signals using one of the optical conduits.

19. The method according to claim 18 wherein the monitoring comprises monitoring after the communicating.

20. The method according to claim 17 wherein the providing comprises providing an optical switch comprising at least one equipment protection device.

21. The method according to claim 17 wherein the providing comprises providing an optical cross-connect switch.

22. The method according to claim 17 further providing equipment protection during the converting.

23. The method according to claim 17 wherein the controlling comprises controlling to implement restoration within the optical communication conduits.

24. A data terminal for supporting monitoring of an optical network, the terminal comprising:

a plurality of transmission interfaces coupled to an optical switch and configured to convert between an optical domain to an electrical domain, wherein the optical switch supports transmission of signals from a plurality of communication paths within the optical network; and

a controller coupled to the transmission interfaces and configured to monitor signal quality of the signals within the transmission interfaces to determine whether the signal quality satisfies a predetermined transmission criterion,

wherein the controller communicates with an optical switch controller coupled to the optical switch to switch from one of the communication paths to another one of the communication paths based on whether the predetermined transmission criterion is satisfied.

25. A terminal according to claim 24, wherein the communication paths include designated working conduits and designated protect conduits, the one communication path being one of the working conduits and the other communication path being one of the protect conduits.

26. A terminal according to claim 24, wherein the transmission interfaces include a receive card and a transmit card, the terminal further comprising:

a switch coupled to the transmission interfaces and configured to switch one of the signals received on the receive card to the transmit card based on the monitoring by the controller.

27. A terminal according to claim 24, wherein the transmission interfaces include a receive card and a plurality of transmit cards, the terminal further comprising:

a port configured to receive an incoming signal from a data equipment;

a switch fabric configured to process the incoming signal from the port; and

a splitter coupled switch fabric and configured to split the incoming signal over the transmit cards for simultaneous transmission to the optical switch.

28. A terminal according to claim 24, wherein the transmission interfaces include a plurality of receive cards and a plurality of transmit cards, each of the cards being configured to generate status information on the signals processed by the cards to the controller.

29. A terminal according to claim 28, wherein the controller determines whether the predetermined transmission criterion is satisfied based on status information concurrently received from multiple ones of the cards.

30. A method for supporting monitoring of an optical network, the method comprising:

converting signals received from an optical switch between an optical domain to an electrical domain, wherein the optical switch supports transmission of signals from a plurality of communication paths within the optical network;

monitoring signal quality of the signals within a plurality of transmission interfaces;

determining whether the signal quality satisfies a predetermined transmission criterion; and

communicating with an optical switch controller coupled to the optical switch to switch from one of the communication paths to another one of the communication paths based on whether the predetermined transmission criterion is satisfied.

31. A method according to claim 30, wherein the communication paths include designated working conduits and designated protect conduits, the one communication path being one of the working conduits and the other communication path being one of the protect conduits.

32. A method according to claim 30, wherein the transmission interfaces include a receive card and a transmit card, the method further comprising:

switching one of the signals received on the receive card to the transmit card based on the determining step.

33. A method according to claim 30, wherein the transmission interfaces include a receive card and a plurality of transmit cards, the method further comprising:

receiving an incoming signal from a data equipment over a port coupled to a switch fabric; and

splitting the incoming signal processed by the switch fabric over the transmit cards for simultaneous transmission to the optical switch.

34. A terminal according to claim 30, wherein the transmission interfaces include a plurality of receive cards and a plurality of transmit cards, each of the cards being configured to generate status information on the signals.

35. A terminal according to claim 30, further comprising:

concurrently receiving status information from multiple ones of the cards, wherein the determining step is performed based on the received status information.