Patents by Inventor Sanjeev RAMACHANDRAN

Sanjeev RAMACHANDRAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10824351
    Abstract: Systems and methods are described in which circuitry of a first controller of a first node receives a first signal indicating an optical loss of signal within the first path. Circuitry of a second controller of the first node on the first path within a transport network generates a second signal indicating a failure within the first path. The first controller accessing a network topology database determines that restoration of the first path would be ineffective due to there being no alternate path, and signals a second node downstream in the first path with the second signal indicating the failure within the first path, and a third signal indicating that restoration of the first path would be ineffective due to there being no alternate path.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: November 3, 2020
    Assignee: Infinera Corporation
    Inventors: Nikhil Kumar Satyarthi, Amit Satbhaiya, Sanjeev Ramachandran, Rajan Rao, Baranidhar Ramanathan
  • Patent number: 10797824
    Abstract: Methods, nodes and control modules are disclosed. In the method, circuitry of a first node in a mesh network converts an optical layer in a working path between the first node and a second node, to a data stream in a digital layer. The working path carries data traffic from the first node to the second node in the optical layer of the mesh network when there is no failure in the working path. Circuitry of the first node in the mesh network detects a failure in the working path due to detection of an error in the data stream in the digital layer. The circuitry of the first node establishes, through transmission of at least one signal from the first node to the second node, a restoration path in the optical layer based on, at least in part, detection of the error in the data stream in the digital layer.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: October 6, 2020
    Assignee: Infinera Corporation
    Inventors: Rajan Rao, Ashok Kunjidhapatham, Ashwini Kumar Bhat, Baranidhar Ramanathan, Sanjeev Ramachandran, Nikhil Satyarhi, Saratchandar Adayapalam Viswanathan, Biao Lu, Amit Satbhaiya, Ramnarayan Srinivasan, Ramakrishna Pratapa
  • Publication number: 20200112365
    Abstract: A transport network, a node, and a method are disclosed. The transport network, the node, and the method detect a failure of a super channel originating from a sliceable light source that is routed through the transport network, by detecting an optical loss of signal by an optical power monitoring device, in presence or absence of an optical loss of signal of the complete band by at least one photo detector. This information is analyzed with a fault detection algorithm using a patch cable network configuration to determine a fault indication for a failure within the first node. The fault signal indicative of the fault indication is then passed to another node on the first path.
    Type: Application
    Filed: October 4, 2018
    Publication date: April 9, 2020
    Inventors: Amit Satbhaiya, Nikhil Kumar Satyarthi, Sanjeev Ramachandran, Rajan Rao, Baranidhar Ramanathan
  • Publication number: 20200059712
    Abstract: A system and method is disclosed in which circuitry of a first controller of a first node on a first path within a transport network receives a first signal indicating a failure within the first path from a second controller. The first node is an end node of the first path. A first client signal failure clear signal is received from a second node upstream of the first node on the first path. The first client signal failure clear signal indicates that a non-restorable fault has been resolved such that the first path can be considered for carrying data traffic. The non-restorable fault is a failure at the source. Subsequent to receiving the first signal indicating the failure within the first path, a backward defect indication clear signal is transmitted to the second node, the backward defect indication clear signal indicating an absence of a failure in the first path.
    Type: Application
    Filed: August 17, 2018
    Publication date: February 20, 2020
    Inventors: Nikhil Kumar Satyarthi, Amit Satbhaiya, Sanjeev Ramachandran, Rajan Rao, Baranidhar Ramanathan, Dileep Padala, Dinesh Kumar Prakasam
  • Patent number: 10447420
    Abstract: Embodiments include methods and apparatuses for providing at least one signaling indication of a super-channel by a power controller in a Wavelength Division Multiplexing (WDM) system. The power controller may receive a service provisioning and a lock state from a network management entity. The power controller may receive, from an optical fabric unit, a fabric state that indicates whether a pass-band of the super-channel is provisioned. The power controller may receive the power level of the super-channel from a power monitoring unit. Based on the power level and attenuation level of the super-channel, the power controller may determine a ramp state that indicates whether the power level reached to a predetermined power. The power controller may determine an alarm state based on the power level. The power controller may determine the signaling indication based on the service provisioning, lock, fabric, ramp, and alarm states.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: October 15, 2019
    Assignee: Infinera Corporation
    Inventors: Rajan Rao, Nikhil Kumar Satyarthi, Parveen Kumar Gupta, Sowmya Mahadevaiah, Sanjeev Ramachandran, Baranidhar Ramanathan, Ramakrishnan Subramanian
  • Publication number: 20190007131
    Abstract: Systems and methods are described in which circuitry of a first controller of a first node receives a first signal indicating an optical loss of signal within the first path. Circuitry of a second controller of the first node on the first path within a transport network generates a second signal indicating a failure within the first path. The first controller accessing a network topology database determines that restoration of the first path would be ineffective due to there being no alternate path, and signals a second node downstream in the first path with the second signal indicating the failure within the first path, and a third signal indicating that restoration of the first path would be ineffective due to there being no alternate path.
    Type: Application
    Filed: August 17, 2018
    Publication date: January 3, 2019
    Inventors: Nikhil Kumar Satyarthi, Amit Satbhaiya, Sanjeev Ramachandran, Rajan Rao, Baranidhar Ramanathan
  • Publication number: 20180351694
    Abstract: Methods, nodes and control modules are disclosed. In the method, circuitry of a first node in a mesh network converts an optical layer in a working path between the first node and a second node, to a data stream in a digital layer. The working path carries data traffic from the first node to the second node in the optical layer of the mesh network when there is no failure in the working path. Circuitry of the first node in the mesh network detects a failure in the working path due to detection of an error in the data stream in the digital layer. The circuitry of the first node establishes, through transmission of at least one signal from the first node to the second node, a restoration path in the optical layer based on, at least in part, detection of the error in the data stream in the digital layer.
    Type: Application
    Filed: June 5, 2018
    Publication date: December 6, 2018
    Inventors: Rajan Rao, Ashok Kunjidhapatham, Ashwini Kumar Bhat, Baranidhar Ramanathan, Sanjeev Ramachandran, Nikhil Satyarhi, Saratchandar Adayapalam Viswanathan, Biao Lu
  • Patent number: 9853726
    Abstract: This disclosure relates to optical line system equipment, which enables wavelength addition for long haul transmission. The system is configured to prevent contention of wavelengths added into a multiplexer. For example, an optical wavelength combiner, such as a multiplexer, may include components that are configured to detect potential collisions between existing wavelengths and a newly added wavelength, and block the addition of the conflicting wavelength while alerting the operator.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: December 26, 2017
    Assignee: Infinera Corporation
    Inventors: Saurabh Kumar, Sanjeev Ramachandran, Baranidhar Ramanathan
  • Publication number: 20170353264
    Abstract: Embodiments include methods and apparatuses for providing at least one signaling indication of a super-channel by a power controller in a Wavelength Division Multiplexing (WDM) system. The power controller may receive a service provisioning and a lock state from a network management entity. The power controller may receive, from an optical fabric unit, a fabric state that indicates whether a pass-band of the super-channel is provisioned. The power controller may receive the power level of the super-channel from a power monitoring unit. Based on the power level and attenuation level of the super-channel, the power controller may determine a ramp state that indicates whether the power level reached to a predetermined power. The power controller may determine an alarm state based on the power level. The power controller may determine the signaling indication based on the service provisioning, lock, fabric, ramp, and alarm states.
    Type: Application
    Filed: June 5, 2017
    Publication date: December 7, 2017
    Applicant: Infinera Corporation
    Inventors: Rajan Rao, Nikhil Kumar Satyarthi, Parveen Kumar Gupta, Sowmya Mahadevaiah, Sanjeev Ramachandran, Baranidhar Ramanathan, Ramakrishnan Subramanian
  • Patent number: 9806842
    Abstract: A device may perform a set of sample measurements of a set of slices of spectrum utilized by an input optical signal. The device may perform an analysis of the input optical signal to determine an attenuation profile. The analysis may include identifying a channel in a particular slice of spectrum, of the set of slices of spectrum, based on an optical power of a sample measurement, of the set of sample measurements, satisfying a threshold. The device may apply the attenuation profile to the input optical signal to generate an output optical signal with a particular spectral shape. The device may provide the output optical signal with the particular spectral shape.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: October 31, 2017
    Assignee: Infinera Corporation
    Inventors: Omer Faruk Yilmaz, Ankur Neog, Saurabh Kumar, Sanjeev Ramachandran
  • Publication number: 20170047992
    Abstract: This disclosure relates to optical line system equipment, which enables wavelength addition for long haul transmission. The system is configured to prevent contention of wavelengths added into a multiplexer. For example, an optical wavelength combiner, such as a multiplexer, may include components that are configured to detect potential collisions between existing wavelengths and a newly added wavelength, and block the addition of the conflicting wavelength while alerting the operator.
    Type: Application
    Filed: September 30, 2015
    Publication date: February 16, 2017
    Inventors: Saurabh KUMAR, Sanjeev RAMACHANDRAN, Baranidhar RAMANATHAN
  • Publication number: 20170019204
    Abstract: A device may perform a set of sample measurements of a set of slices of spectrum utilized by an input optical signal. The device may perform an analysis of the input optical signal to determine an attenuation profile. The analysis may include identifying a channel in a particular slice of spectrum, of the set of slices of spectrum, based on an optical power of a sample measurement, of the set of sample measurements, satisfying a threshold. The device may apply the attenuation profile to the input optical signal to generate an output optical signal with a particular spectral shape. The device may provide the output optical signal with the particular spectral shape.
    Type: Application
    Filed: July 14, 2015
    Publication date: January 19, 2017
    Inventors: Omer Faruk YILMAZ, Ankur NEOG, Saurabh KUMAR, Sanjeev RAMACHANDRAN