Communication/power network having out-of-band time and control signaling

• US 20080037987A1
• Filed: 02/06/2007
• Published: 02/14/2008
• Est. Priority Date: 02/06/2006
• Status: Abandoned Application

• Current Assignee: Woods Hole Oceanographic Institution
• Original Assignee: Woods Hole Oceanographic Institution
• Inventors: Lerner, Steven, Bradley, Albert, Maffei, Andrew, Chave, Alan, Sonnichsen, Frederick
• Application Number:
  US11/702,851
• Publication Number:
  US 20080037987A1
• Time in Patent Office: Days
• US Class Current: 398/59
• CPC Class Codes: H04B 10/0773 Network aspects, e.g. central monitoring of transmission parameters
• CPC Class Codes: H04J 3/0644 External master-clock

Abstract

The systems and methods provide an out-of-band time and control signal distribution network that may be employed in conjunction with a large scale area network. The network is capable of installation on the seafloor and comprises a plurality of network nodes being interconnected by fiber optic cable, and each having optical transceivers for coupling to an optical fiber cable having data channels carrying data packets among the plurality of network nodes and having one or more control and time channels for carrying control and time signals, and an out-of-band communications module for coupling to the optical fiber cable to utilize the control and time data signals transmitted separately from the data packets, to provide the distribution of in-band data packets among network nodes and the distribution of out-of-band timing and control signals to said plural network nodes.

Claims

1. A communication network capable of installation on the seafloor and comprising

a plurality of network nodes being interconnected by fiber optic cable, and each having

optical transceivers for coupling to an optical fiber cable having data channels carrying data packets among the plurality of network nodes and having one or more control and time channels for carrying control and time signals, and

an out-of-band communications module for coupling to the optical fiber cable to utilize the control and time data signals transmitted separately from the data packets, to provide the distribution of in-band data packets among network nodes and the distribution of out-of-band timing and control signals to said plural network nodes.

2. The communication network according to claim 1, wherein said out-of-band communications module further comprises

a control module for regulating the flow of control and time signals across the optical channel.

3. The communication network according to claim 2, wherein the control module further comprises

a time distribution module for distributing a NIST-traceable time signal corrected for transmission latency among the plural network nodes.

4. The communication network according to claim 3, having

means for measuring the transmission latency among the plural network nodes.

5. A communication network according to claim 2, wherein the control module further includes

an interface controller for selectively allowing a plurality of data channels internal to the network node to access the optical channel carrying control and time signals among the network nodes.

6. A communication network according to claim 5, wherein the control module allows one node at a time to access the control and time signals among all of the network nodes.

7. A communication network according to claim 5, wherein the module further includes

a media access controller for blocking data from being received over a channel in response to detecting data being received on another channel.

8. A communication network according to claim 2, further comprising

a control circuit for regulating access to a given optical path carrying control and time signals among the network nodes and capable of suppressing multiple repeats of said signal.

9. An out-of-band communication network according to claim 1, further comprising

a serial interface circuit for communicating optical data over the optical channel at a rate of between 50 BAUD (Bits Per Second) and 115,000 BAUD.

10. A communication network according to claim 9, further comprising

a base band keying circuit for on/off keying a laser diode to generate data signals for distribution over the optical channel.

11. A communication network according to claim 10, wherein the laser diode comprises a communications laser.

12. An out-of-band communication network according to claim 10, further comprising

a power regulator circuit for regulating the power applied to the laser diode.

13. A communication network according to claim 12, wherein

the power regulator circuit utilizes the internal Laser Diode monitor diode to monitor optical power generated by the laser diode using a non-carrier based communications protocol and a feedback loop to regulate the power generated thereby.

14. A communication network according to claim 1, further comprising

a low power sleep mode allowing a control module to turn itself off by timed prearrangement or by lack of incoming signals.

15. A communication network according to claim 1, having in situ battery power for at least one week.

16. A communication network according to claim 13, further comprising a wake-up circuit for causing the device to enter into an active state in response to an incoming signal.

17. A communication network according to claim 16, further comprising a time distribution system for synchronizing clocks within the network nodes in response to a timing pulse transmitted over the optical channel.

18. A communication network according to claim 1, wherein the network nodes are arranged in an architecture selected from the group consisting of a mesh architecture, a bus architecture, a ring architecture, or a star architecture.

19. A communication network, comprising

a master node having

a data packet generator,

control and time distribution circuits for generating control and time signals, and

a NIST-traceable time source,

a steering module to allow operation in mesh, bus, ring, or star architectures,

an optical transceiver for transmitting and receiving data as optical signals over an optic channel, and

a plurality of network nodes arranged into a selected network configuration, and further having

an optical transceiver for coupling to an optical channel carrying data packets among the plurality of network nodes and having a control and time channel for carrying control and time signals, and

an out-of-band communications module for coupling to the optical fiber cable to detect the control and time signals transmitted separately from the data packets, to thereby provide the distribution of in-band data packets among network nodes and the distribution of out-of-band time and control signals to said plural network nodes.