Optical circuit switched protocol

• US 6,101,013 A
• Filed: 01/30/1998
• Issued: 08/08/2000
• Est. Priority Date: 01/30/1998
• Status: Expired due to Fees

• Current Assignee: National Aeronautics and Space Administration US Government As Represented By The Administrator of The
• Original Assignee: United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration
• Inventors: Monacos, Steve P.
• Primary Examiner(s): Pascal, Leslie
• Assistant Examiner(s): Phan, Hanh
• Application Number:
  US09/024,868
• Time in Patent Office: 921 Days
• Field of Search: 359/139, 359/138, 359/140, 359/117, 359/165, 370/357, 370/360, 370/389, 370/386, 370/392
• US Class Current: 398/1
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04Q 11/0005 Switch and router aspects
• CPC Class Codes: H04Q 11/0066 Provisions for optical burst or packet networks
• CPC Class Codes: H04Q 2011/0039 Electrical control
• CPC Class Codes: H04Q 2011/0073 Provisions for forwarding or routing, e.g. lookup tables
• CPC Class Codes: H04Q 2011/0088 Signalling aspects

Abstract

The present invention is a system and method embodied in an optical circuit switched protocol for the transmission of data through a network. The optical circuit switched protocol is an all-optical circuit switched network and includes novel optical switching nodes for transmitting optical data packets within a network. Each optical switching node comprises a detector for receiving the header, header detection logic for translating the header into routing information and eliminating the header, and a controller for receiving the routing information and configuring an all optical path within the node. The all optical path located within the node is solely an optical path without having electronic storage of the data and without having optical delay of the data. Since electronic storage of the header is not necessary and the initial header is eliminated by the first detector of the first switching node, multiple identical headers are sent throughout the network so that subsequent switching nodes can receive and read the header for setting up an optical data path.

Claims

1. An optical circuit switched system for transmitting data from source locations to destination locations within an optical network comprising:

an optical data packet having a header, a data payload portion, and a trailer; and

a plurality of optical switching nodes interconnecting the locations of network together, wherein each optical switching node comprises a detector for receiving the header, header detection logic for translating the header into routing information and eliminating the header, and a controller for receiving the routing information and for configuring an all optical path within each node;

wherein said all optical path located within said optical switching node is solely an optical path without having electronic storage of the data and without having optical delay of the data;

wherein multiple identical headers are sent throughout the network so that subsequent switching nodes can receive and read the header for setting up an optical data path.

2. The optical circuit switched system of claim 1, wherein the network has a finite number of optical switching nodes in the network.

3. The optical circuit switched system of claim 2, wherein a predetermined finite number of multiple identical headers are sent throughout the network.

4. The optical circuit switched system of claim 2, wherein a finite number of multiple identical headers equal to the maximum number of optical switching nodes in a communication path are sent throughout the network.

5. The optical switching node of claim 1, wherein said network has an infinite number of optical switching nodes in the network.

6. The optical switching node of claim 5, wherein an infinite number of multiple identical headers are sent throughout the network.

7. The optical circuit switched system of claim 1, wherein multiple identical headers are sent throughout the network until the destination location sends the source location a handshake signal acknowledging receipt of the headers.

8. An optical switching node for transmitting an optical data packet within a network, wherein the optical data packet includes a header, data, and a trailer portion, the optical switching node comprising:

a detector for converting the optical signal to an electrical signal;

a header detection logic device for determining if the information is the header, the data, or the trailer portion, for processing only the header, for translating the header into routing information, and for eliminating the header; and

a controller for receiving the routing information and for configuring an all optical data path within the node;

wherein the all optical data path located within the node is solely an optical path without having electronic storage of the data and without having optical delay of the data.

9. The optical switching node of claim 8, further comprising a link for connection of the optical switching node to plural optical switching nodes to define a network.

10. The optical switching node of claim 9, wherein multiple identical headers are sent throughout the network so that subsequent switching nodes can receive and read the header for setting up an optical data path.

11. The optical switching node of claim 10, wherein the network has a finite number of optical switching nodes in the network.

12. The optical switching node of claim 11, wherein a predetermined finite number of multiple identical headers are sent throughout the network.

13. The optical switching node of claim 11, wherein a finite number of multiple identical headers equal to the maximum number of optical switching nodes in a communication path are sent throughout the network.

14. The optical switching node of claim 10, wherein said network has an infinite number of optical switching nodes in the network.

15. The optical switching node of claim 14, wherein an infinite number of multiple identical headers are sent throughout the network.

16. The optical switching node of claim 14, wherein multiple identical headers are sent throughout the network until the destination location sends the source location a handshake signal acknowledging receipt of the headers.

17. A method for transmitting optical data packets from source locations to destination locations within an optical network, wherein the optical data packet includes a header and a data payload portion, wherein the method comprises the steps of:

interconnecting the locations of the network together with a plurality of optical switching nodes;

receiving the header, translating the header into routing information, eliminating the header, receiving the routing information, and configuring an all optical path within the nodes; and

sending multiple identical headers throughout the network so that subsequent switching nodes can receive and read the header for setting up an optical data path.

18. The method of claim 17, wherein the network has a finite number of optical switching nodes in the network and a predetermined finite number of multiple identical headers are sent throughout the network.

19. The method of claim 18, wherein a finite number of multiple identical headers equal to the maximum number of optical switching nodes in a communication path are sent throughout the network.

20. The method of claim 17, wherein said network has an infinite number of optical switching nodes in the network and wherein an infinite number of multiple identical headers are sent throughout the network.

21. The method of claim 20, wherein multiple identical headers are sent throughout the network until the destination location sends the source location a handshake signal acknowledging receipt of the headers.