Patents Assigned to Infinera Corporation
  • Publication number: 20190140976
    Abstract: A method and apparatus for the efficient dynamic allocation of additional bandwidth in an optical virtual private network (OVPN) are described herein. A software defined network (SDN) controller may receive a request from an end-user of an OVPN for active bandwidth. Then, the SDN controller may determine whether the OVPN requires additional bandwidth to satisfy the request. As of the request, the additional bandwidth may be pre-deployed, but not yet activated for use. In an example, a path computation element (PCE) of the SDN controller may make this determination. Further, the SDN controller, on a condition that additional bandwidth is required, may determine whether additional bandwidth may be activated based on a policy of the end-user. As a result, the SDN controller, on a condition that additional bandwidth may be activated, may transmit an activation message to one or more line cards of the OVPN to activate the additional bandwidth.
    Type: Application
    Filed: November 7, 2017
    Publication date: May 9, 2019
    Applicant: Infinera Corporation
    Inventors: Christopher Liou, Balaji Balasubramanian, Mahidhar Rajala, Srinivasan Seetharaman, Anurag Sharma, Sri Mohana Satya Srinivas Singamsetty
  • Patent number: 10277965
    Abstract: A method and system are disclosed in which a link state advertisement message (LSA) conforming to a Generalized Multiprotocol Label Switching (GMPLS) routing protocol is generated and transmitted. The LSA is associated with a TE Link between a transmit node and a receive node in a network. The transmit node supplies a plurality of optical signals, each of which has a plurality of frequencies, the frequencies being allocated among a plurality of spectral portions such that the plurality of spectral portions are grouped into a plurality of frequency slots. The LSA may include information indicative of a number of spectral portions, e.g., spectral slices, which correspond to frequencies of selected ones of the plurality of optical signals, said selected ones of the plurality of optical signals being available to carry data from the transmit node to the receive node.
    Type: Grant
    Filed: September 13, 2015
    Date of Patent: April 30, 2019
    Assignee: Infinera Corporation
    Inventors: Abinder Dhillon, Iftekhar Hussain, Rajan Rao, Marco Sosa
  • Patent number: 10261259
    Abstract: Consistent with the present disclosure, a coherent receiver PIC may be provided having waveguides that may be routed in a substantially U-shaped bend to feed both an incoming signal and a local oscillator signal into a 90-degree optical hybrid circuit, which may include a multi-mode interference (MMI) device. As a result, one or more local oscillator lasers may be provided between optical hybrid circuits in certain examples, and, in other examples, optical waveguides feeding optical signals to the optical hybrids are provided between the optical hybrid circuits. In both examples, a more compact receiver PIC layout may be achieved without waveguide crossings, that can be linearly scaled to accommodate reception of additional signals or channels without added complexity.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: April 16, 2019
    Assignee: Infinera Corporation
    Inventor: Peter W. Evans
  • Patent number: 10230653
    Abstract: Systems, methods, and devices for managing latency in a network with a plurality of switches, each switch having client side ports and line side ports. A required bandwidth for each link between connected pairs of the plurality of switches is received. A client-side capacity value for each switch is received. An initial undersubscription factor is calculated based on the required bandwidths and the client-side capacity values. A desired undersubscription factor is calculated for each switch based on the initial undersubscription factor and the client side capacity values. A desired bandwidth is calculated for each link between connected pairs of the plurality of switches based on the required bandwidths and the desired undersubscription factors.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: March 12, 2019
    Assignee: Infinera Corporation
    Inventors: Madhukar Anand, Ramesh Subrahmaniam, Stuart Elby
  • Patent number: 10211925
    Abstract: A device may include a substrate. The device may include a carrier mounted to the substrate. The device may include a transmitter photonic integrated circuit (PIC) mounted on the carrier. The transmitter PIC may include a plurality of lasers that generate an optical signal when a voltage or current is applied to one of the plurality of lasers. The device may include a first microelectromechanical structure (MEMS) mounted to the substrate. The first MEMS may include a first set of lenses. The device may include a planar lightwave circuit (PLC) mounted to the substrate. The PLC may be optically coupled to the plurality of lasers by the first set of lenses of the first MEMS. The device may include a second MEMS, mounted to the substrate, that may include a second set of lenses, which may be configured to optically couple the PLC to an optical fiber.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: February 19, 2019
    Assignee: Infinera Corporation
    Inventors: Timothy Butrie, Michael Reffle, Xiaofeng Han, Mehrdad Ziari, Vikrant Lal, Peter W. Evans, Fred A. Kish, Jr., Donald J. Pavinski, Jie Tang, David Coult
  • Patent number: 10211928
    Abstract: Constant modulus multi-dimensional modulation system and methods are disclosed herein, employing multi-intensity quadrature amplitude modulation (QAM) to generate a dual-polarization symbol. j bits may be mapped to one of a plurality of dual-polarization symbols having a same constant power modulus on a two-level constellation including first and second intensity rings in a four-dimensional (4D) space including in-phase (I), quadrature (Q), X polarization (Xpol) and Y polarization (Ypol). A first bit of the j bits may indicate that the symbol is on the first intensity ring for the Xpol and the second intensity ring for the Ypol, a next k bits may indicate a location of the symbol on the first intensity ring in the Xpol, and a remaining j?k?1 bits may indicate a location of the symbol on the second intensity ring in the Ypol. Maximum correlation decoding may be used to decode the first symbol at the receiver.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: February 19, 2019
    Assignee: Infinera Corporation
    Inventors: Abdullah S. Karar, Han Sun, Kuang-Tsan Wu
  • Patent number: 10205301
    Abstract: Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second cladding layer provided on the waveguide core; and a heat source configured to change a temperature of at least one of the waveguide core and the grating, where an optical mode propagating in the waveguide core of the mirror section does not incur substantial loss due to interaction with portions of the mirror section above and below the waveguide core.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: February 12, 2019
    Assignee: Infinera Corporation
    Inventors: Peter W Evans, Mingzhi Lu, Fred A. Kish, Jr., Vikrant Lal, Scott Corzine, John W. Osenbach, Jin Yan
  • Patent number: 10187079
    Abstract: Methods and apparatuses are described herein for metastability error detection and correction in analog-to-digital converters (ADCs). For example, an ADC may comprise a comparator, a register circuit, a first circuit, and a second circuit. The comparator may generate a comparator output signal in response to a sampling clock signal. The register circuit, operatively coupled to the comparator, may process the comparator output signal. The first circuit, operatively coupled to the comparator and the register circuit may generate a plurality of first output bits that include a bit indicating a metastability error on a condition that the metastability error occurred during the bit conversion. The second circuit, operatively coupled to the first circuit, may generate a plurality of second output bits indicating a location of the metastability error. The plurality of second output bits may be sampled using first and second groups in response to the sampling clock signal.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: January 22, 2019
    Assignee: Infinera Corporation
    Inventor: Shah Sharif
  • Patent number: 10181697
    Abstract: Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second cladding layer provided on the waveguide core; and a heat source configured to change a temperature of at least one of the waveguide core and the grating, where an optical mode propagating in the waveguide core of the mirror section does not incur substantial loss due to interaction with portions of the mirror section above and below the waveguide core.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: January 15, 2019
    Assignee: Infinera Corporation
    Inventors: Peter W. Evans, Mingzhi Lu, Fred A. Kish, Jr., Vikrant Lal, Scott Corzine, John W. Osenbach, Jin Yan
  • Patent number: 10181696
    Abstract: Methods, systems, and apparatus, including an optical receiver including a laser including a gain section; and a first tunable reflector configured to output a reference signal; a first coupler formed over the substrate; a shutter variable optical attenuator formed over the substrate, the shutter variable optical attenuator including an input port configured to receive the first portion of the reference signal from the laser; and an output port configured to provide or to block, based on a control signal, the first portion of the reference signal from the laser; and a second coupler including a first port configured to receive the first portion of the reference signal from the shutter variable optical attenuator; and a second port configured to (i) provide the first portion of the reference signal from the shutter variable optical attenuator to an optical analyzer or (ii) receive a data signal from a transmitter.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: January 15, 2019
    Assignee: Infinera Corporation
    Inventors: Peter W. Evans, Jeffrey T. Rahn, Vikrant Lal, Miguel Iglesias Olmedo, Amir Hosseini, Parmijit Samra, Scott Corzine, Ryan W. Going
  • Patent number: 10181698
    Abstract: Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second cladding layer provided on the waveguide core; and a heat source configured to change a temperature of at least one of the waveguide core and the grating, where an optical mode propagating in the waveguide core of the mirror section does not incur substantial loss due to interaction with portions of the mirror section above and below the waveguide core.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: January 15, 2019
    Assignee: Infinera Corporation
    Inventors: Peter W. Evans, Mingzhi Lu, Fred A. Kish, Jr., Vikrant Lal, Scott Corzine, John W. Osenbach, Jin Yan
  • Publication number: 20190014036
    Abstract: A method and system for flow tracing for use in a packet-optical network is disclosed herein. A device in the packet-optical network may receive a packet including a header and payload. The device may read intent information from the header, and translate the intent information to generate a device-specific action in an optical layer to provide one or more globally unique identifiers (IDs) associated with the device. The device may execute the device-specific action in the optical layer to generate a response including the globally unique IDs corresponding to the intent, where the response forms part of the flow trace. The device may associate the response with the intent, and encode the response for downstream data forwarding. The device may further add multi-layer proof-of-transit (POT) information to the response that may be used to securely verify the path indicated in the SmartFlow flow trace.
    Type: Application
    Filed: December 13, 2017
    Publication date: January 10, 2019
    Applicant: Infinera Corporation
    Inventors: Madhukar Anand, Ramesh Subrahmaniam, Radhakrishna Valiveti
  • Publication number: 20190013954
    Abstract: A method and system for elastic timestamping for use in computing and networking applications including telemetry is disclosed herein. A device that is part of a system may initially generate a variable size timestamp or elastic n-dimensional timestamp (ENTS) with n time dimensions fields for a corresponding event in the system for which timing or temporal order information is needed. The device may select a subset of the n time dimensions fields of the ENTS based on a relevant time granularity of the corresponding event to generate a compact ENTS with a reduced size. The device may communicate the compact ENTS for further processing. In an example, the ENTS may be generated for a device-specific action performed to gather telemetry data in response to received telemetry intent at the device, and the compact ENTS may be communicated with a corresponding telemetry response.
    Type: Application
    Filed: December 21, 2017
    Publication date: January 10, 2019
    Applicant: Infinera Corporation
    Inventors: Madhukar Anand, Ramesh Subrahmaniam, Radhakrishna Valiveti
  • Publication number: 20190014395
    Abstract: A system and methods for reliable telemetry are disclosed herein. In an example of reliable in-band telemetry in a communications network, intent information for a destination device may be generated at a network device indicating a type of telemetry data to be collected. The network device may update a locally stored invertible Bloom function (IBF) by applying one or more hash function to the intent information, a destination identifier (ID) associated with the destination device, and/or a local timestamp, and periodically forward the locally stored IBF to the destination device. The network device may receive a notification message by the destination device that the intent information is missing at the destination device and re-forward the intent information to the destination device. In another example, a network device may maintain and periodically forward a locally stored IBF based on response data and the destination ID.
    Type: Application
    Filed: April 6, 2018
    Publication date: January 10, 2019
    Applicant: Infinera Corporation
    Inventors: Madhukar Anand, Ramesh Subrahmaniam, Radhakrishna Valiveti
  • Publication number: 20190014394
    Abstract: A method and system for packet-optical in-band telemetry (POINT) that may be used in a packet-optical network is disclosed herein. An intermediate POINT device may receive a packet including at least a header and a payload at a packet layer. The POINT device may read intent information from the header, and the intent information may indicate a type of telemetry data to be collected. The POINT device may translate the intent information from the packet layer to generate a device-specific action in an optical layer to the type of telemetry data indicated by the intent. The POINT device may execute the device-specific action in the optical layer to generate a response corresponding to the intent, associate the response with the intent, and encode the response in the packet layer for downstream data forwarding.
    Type: Application
    Filed: November 2, 2017
    Publication date: January 10, 2019
    Applicant: Infinera Corporation
    Inventors: Madhukar Anand, Ramesh Subrahmaniam, Sanjoy Bardhan, Radhakrishna Valiveti
  • Patent number: 10177531
    Abstract: Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second cladding layer provided on the waveguide core; and a heat source configured to change a temperature of at least one of the waveguide core and the grating, where an optical mode propagating in the waveguide core of the mirror section does not incur substantial loss due to interaction with portions of the mirror section above and below the waveguide core.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: January 8, 2019
    Assignee: Infinera Corporation
    Inventors: Peter W. Evans, Mingzhi Lu, Fred A. Kish, Jr., Vikrant Lal, Scott Corzine, John W. Osenbach, Jin Yan
  • Patent number: 10175005
    Abstract: A method of fabricating a heat pipe may include providing a first material as a body section. The method may include stamping or etching the body section to include the cavity. A portion of the body section may constitute a wall of the cavity. The method may include stamping or etching the wall of the cavity to provide a set of corrugations on a portion of the wall of the cavity. The method may include forming an opening in the wall of the cavity. The method may include attaching a lid over the cavity. The lid constituting at least a portion of a hermetic seal of the cavity. The method may include attaching a cover to the body section approximately adjacent to the opening in the cavity. The method may include attaching a valve to the body section approximately at the opening to the cavity.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: January 8, 2019
    Assignee: Infinera Corporation
    Inventors: John W. Osenbach, Jie Tang, S. Eugene Messenger, John Coronati
  • Publication number: 20190007277
    Abstract: Systems, methods, and devices for simulating a large network topology and characterizing network devices. the method includes generating a simulated open shortest path first (OSPF) network topology using a simulator device; generating link state advertisement (LSA) OSPF packets based on the simulated OSPF network topology using the simulator device; and communicating the OSPF packets to a gateway device for flooding a real OSPF network topology with the OSPF packets.
    Type: Application
    Filed: June 30, 2017
    Publication date: January 3, 2019
    Applicant: Infinera Corporation
    Inventors: Mohit Misra, Prakash Singh Bisht, Ashwini Kumar Bhat, Devaraj Jagannath Poojari, Jyothi R
  • Publication number: 20190007238
    Abstract: Systems, methods, and devices for encoding and decoding a packet buffer for data exchange over a communications network, including parsing a data container definition file to determine a packet format; generating a code file based on the data container definition file; inserting the code file into a source tree of an application; compiling the source tree to generate an executable file; and executing the executable on a computing device in communication with the communications network, wherein the executable file encodes and decodes the packet buffer for data exchange over the communications network.
    Type: Application
    Filed: June 30, 2017
    Publication date: January 3, 2019
    Applicant: Infinera Corporation
    Inventors: Mohit Misra, Prakash Singh Bisht, Ashwini Kumar Bhat
  • Publication number: 20190004932
    Abstract: A unit test and automation framework (UTAF) system and method are disclosed for unit testing. A unit definition file that includes properties of the unit being tested may be compiled to generate a skeleton code that describes a structure of the unit and the interactions of the unit with other units. One or more interactions may be overridden to generate a unit production code for the unit. A unit testing (UT) engine may enable interactions between the unit and the other units to run test cases on the unit production code as part of unit testing. Various components of the UTAF system may provide commands to or perform functions for the UT engine to perform the unit testing, such as providing test commands, displaying statistics, providing interface messaging between the unit and the plurality of other units, provide commands for record and replay testing, and other information.
    Type: Application
    Filed: June 30, 2017
    Publication date: January 3, 2019
    Applicant: Infinera Corporation
    Inventors: Mohit Misra, Subhendu Chattopadhyay, Ravi Shankar Pandey, Saurabh Pandey, Ruchi Agrawal