Redundant switch fabric methods and system for switching of telecommunication signals

• US 6,836,353 B1
• Filed: 11/20/2001
• Issued: 12/28/2004
• Est. Priority Date: 11/20/2001
• Status: Expired due to Fees

• Current Assignee: Nayna Networks, Inc.
• Original Assignee: Nayna Networks, Inc.
• Inventors: Jain, Raj, Ramadas, Krishna Kumar
• Primary Examiner(s): Font, Frank G.
• Assistant Examiner(s): CONNOLLY, PATRICK J
• Application Number:
  US09/991,316
• Time in Patent Office: 1,134 Days
• Field of Search: 385/16, 385/17, 385/18, 385/19, 385/20, 385/21, 385/22, 385/23, 385/24, 359/290, 359/291, 359/298
• US Class Current: 359/298
• 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 14/0284 WDM mesh architectures
• CPC Class Codes: H04J 14/0297 Optical equipment protection
• CPC Class Codes: H04Q 11/0005 Switch and router aspects
• CPC Class Codes: H04Q 2011/003 using switches based on microelectro-mechanical systems [MEMS]
• CPC Class Codes: H04Q 2011/0043 Fault tolerance

Abstract

An optical switching system and method. The method includes tapping a first portion of an incoming data beam from an incoming source; and transferring the incoming data beam from the incoming source to a first path provided by a first MEMS based switching fabric. The method also transfers a monitoring source to monitor a second path of provided by second MEMS based switch fabric, while the second path of the second MEMS based switch fabric is in a stand by mode. A step of tapping a second portion of an outgoing data beam provided by the first MEMS based switching fabric is also included. The method determines if a process condition of the first path by at least the second portion of the outgoing data beam.

Claims

1. An optical switching system, the system comprising:

a housing;

an input device coupled to the housing;

an output device coupled to the housing;

a first switch fabric coupled between the input device and coupled between the output device, the first switch fabric comprising a plurality of MEMS based switching devices, one or more of the MEMS based switching device being capable of deflecting optical signals;

a second switch fabric coupled between the input device and coupled between the output device, the second switch fabric comprising a plurality of MEMS based switching devices, one or more of the MEMS based switching device being capable of deflecting optical signals;

an input fiber bundle coupled to the input device;

an output fiber bundle coupled to the output device;

a first switching device coupled to the first switch fabric and coupled to the second switch fabric, the first switching device also being coupled to the input device for receiving a beam from one of the input fibers and directing the beam to the first switch fabric or the second switch fabric depending upon a predetermined criteria;

a second switch device coupled to the first switch fabric and coupled to the second switch fabric, the second switching device also being coupled to the output device for receiving the beam from either the first switch fabric or the second switch fabric depending upon the predetermined criteria; and

a control device coupled to the first switch device and the second switch device, the control device providing a signal to determine if the beam is to be directed to the first switch fabric or the second switch fabric based upon the predetermined criteria.

2. The system of claim 1 wherein each of the MEMS based switching devices is capable of directing an optical signal from the input fiber bundle to the output fiber bundle.

3. The system of claim 1 wherein the first switch fabric is a primary switch fabric and the second switch fabric is a backup switch fabric.

4. The system of claim 1 wherein the first switching device is provided on a fiber interface card.

5. The system of claim 1 wherein the second switching device is provided on a fiber interface card.

6. The system of claim 1 further comprising a position beam source coupled to the first switching device.

7. The system of claim 6 further comprising a sensor device coupled to the second switching device.

8. The system of claim 1 wherein the first switching device is a two by two switch.

9. The system of claim 1 wherein the second switching device is a two by two switch.

10. The system of claim 1 further comprising a position beam source coupled to the first switching device and a sensor device coupled to the second switching device, the second switching device being adapted to receive a position beam from the position beam source.

11. A method of operating an optical switching system, the method comprising:

tapping a first portion of an incoming data beam from an incoming source;

transferring the incoming data beam from the incoming source to a first path provided by a first MEMS based switching fabric;

transferring a monitoring source to monitor a second path of provided by second MEMS based switch fabric, while the second path of the second MEMS based switch fabric is in a stand by mode;

tapping a second portion of an outgoing data beam provided by the first MEMS based switching fabric; and

determining a process condition of the first path by at least the second portion of the outgoing data beam.

12. The method of claim 11 wherein the determining is provided by the first portion of the incoming data beam.

13. The method of claim 11 wherein the incoming data beam and the outgoing data beam are continuous.

14. The method of claim 11 wherein the second MEMS based switch fabric is redundant.

15. The method of claim 11 wherein the incoming data beam and the monitoring beam can be switch to traverse through either the first path or the second path.