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1. 发明授权

US12063074B2 Fiber cut/fault localization using digital subcarriers 有权
公开(公告)号：US12063074B2
公开(公告)日：2024-08-13
申请号：US17817253
申请日：2022-08-03
申请人： Infinera Corp.
发明人： Magnus Olson , Amir Rashidinejad , Jia Ge
IPC分类号： H04B10/63 , H04B10/40 , H04W72/0453
CPC分类号： H04B10/63 , H04B10/40 , H04W72/0453
摘要： A method is described in which a coherent transmitter transmits a first optical signal having customer data through a fiber optic link. A control signal is provided to the coherent transmitter to cause the coherent transmitter to transmit a second optical signal devoid of customer data. A reflection of the second optical signal is detected via the coherent receiver. Then, a chromatic dispersion of the reflection of the second optical signal is determined and correlated with known parameters indicative of an amount of chromatic dispersion per unit length of the fiber optic link to determine a distance travelled by the second optical signal.

2. 发明授权

US12047163B2 Out-of-band communication channel for point-to-multi-point communications 有权
公开(公告)号：US12047163B2
公开(公告)日：2024-07-23
申请号：US17527137
申请日：2021-11-15
申请人： Infinera Corporation
发明人： Christopher Fludger , Syed Muhammad Bilal , Demin Yao , Xiang Chen , Han Henry Sun , Byungyoon Min , William Isaac , Zihao Liu , Yuanqing Li
IPC分类号： H04J14/02 , H04B10/50 , H04B10/54
CPC分类号： H04J14/0257 , H04B10/504 , H04B10/54 , H04J14/0272
摘要： Techniques are described for implementing an out-of-band communication channel used to exchange control channel information in sub-carrier-based optical communication systems. In an example implementation, a transmitter includes a laser operable to supply an optical signal, a digital signal processor operable to supply first electrical signals based on first data input to the digital signal processor and second data input to the digital signal processor, digital-to-analog conversion circuitry operable to output second electrical signals based on the first electrical signals, modulator driver circuitry is operable to output third electrical signals based on the second electrical signals, and an optical modulator operable to supply first and second modulated optical signals based on the third electrical signals. The first modulated optical signal includes a plurality of optical subcarriers carrying user data. The plurality of optical subcarriers also being amplitude modulated to carry control information.

3. 发明授权

US11996884B1 Dual marker based latency measurement 有权
公开(公告)号：US11996884B1
公开(公告)日：2024-05-28
申请号：US17527102
申请日：2021-11-15
申请人： Infinera Corporation
发明人： Vinod Narippatta , Ting-Kuang Chiang , Tulasi Veguru , Scott Pringle
IPC分类号： H04B10/079 , H04B10/40 , H04L49/90
CPC分类号： H04B10/0795 , H04B10/40 , H04L49/90
摘要： Systems, methods, devices, and other implementations for minimizing latency asymmetries and variations in a bi-directional link between two nodes in a communication system are described. To determine a variable latency for communication between two network nodes, a transmitting node can insert a line marker and a client marker into the data to be transmitted to the receiving node. The line marker and client marker can be inserted into the data at different portions or by different components of a transmitter. The receiving node can receive the transmitted data and extract the line marker and client marker. A delay associated with the line and client markers (Tc-TL) in the transmission device and a delay between the reception of the line and clien markers (Rc-RL) at the receiving node can be used to determine the variable latency.

4. 发明授权

US11979186B2 Computation of optimum fiber input power 有权
公开(公告)号：US11979186B2
公开(公告)日：2024-05-07
申请号：US17929170
申请日：2022-09-01
申请人： Infinera Corp.
发明人： Ankur Neog , Zhong Pan , Baranidhar Ramanathan
IPC分类号： H04B10/079 , G06N3/082
CPC分类号： H04B10/07953 , G06N3/082
摘要： Disclosed herein are methods and systems for computing a launch power for an optical node by collecting data for an optical network segment and inputting the collected data and first power spectral density values into a machine learning model which are used to compute a first non-linear interference value. A first generalized-optical signal-to-noise ratio value is computed using the computed first non-linear interference value and amplified spontaneous emission values. At least one second generalized-optical signal-to-noise ratio value is computed using at least one second non-linear interference value, computed using at least one second power spectral density values, and the amplified spontaneous emission values. A highest generalized-optical signal-to-noise ratio value is determined by comparing the first generalized-optical signal-to-noise ratio value and the at least one second generalized-optical signal-to-noise ratio value. A launch power is computed using the power spectral density values associated with the highest generalized-optical signal-to-noise ratio.

5. 发明授权

US11943121B2 Observability without changing the target 有权
公开(公告)号：US11943121B2
公开(公告)日：2024-03-26
申请号：US17840875
申请日：2022-06-15
申请人： Infinera Corp.
发明人： Praveen Kumar Pal , Dharmendra Naik , Madhav Kothapalli
IPC分类号： H04L43/045 , H04L43/0817 , H04L43/0894
CPC分类号： H04L43/045 , H04L43/0817 , H04L43/0894
摘要： A network element is herein disclosed. The network element comprises an embedded device having one or more property affecting a function of the embedded device; a computing system having a processor and a memory, the memory being a non-transitory computer-readable medium storing a performance monitoring domain agent, a performance monitoring collector daemon, and a performance monitoring logger. The performance monitoring collector daemon is processor-executable code that when executed by the processor causes the processor to communicate with the embedded device and collect one or more performance information of the embedded device based on the one or more property. The performance monitoring domain agent is processor-executable code that when executed by the processor causes the processor to: retrieve the performance information from the performance monitoring collector daemon; format the performance information into a formatted data based on a metrics metadata file; and transmit the formatted data to the performance monitoring logger.

6. 发明授权

US11868704B2 Method apparatus, and computer readable medium for defining and encoding packets for data exchange over a network 有权
公开(公告)号：US11868704B2
公开(公告)日：2024-01-09
申请号：US15639994
申请日：2017-06-30
申请人： Infinera Corporation
发明人： Mohit Misra , Prakash Singh Bisht , Ashwini Kumar Bhat
IPC分类号： G06F40/14 , G06F16/13 , H04L12/54 , H04L45/02 , H04L45/48 , G06F8/41 , H04L12/66
CPC分类号： G06F40/14 , G06F16/13 , H04L12/56 , H04L45/10 , H04L45/48 , G06F8/41 , H04L12/66
摘要： 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.

7. 发明授权

US11855754B2 Subcarrier modulation with radio frequency (RF) IQ modulators 有权
公开(公告)号：US11855754B2
公开(公告)日：2023-12-26
申请号：US16730562
申请日：2019-12-30
申请人： Infinera Corporation
发明人： Kuang-Tsan Wu , Han Henry Sun , Steven Joseph Hand , David F. Welch
IPC分类号： H04J14/02 , H04B10/25
CPC分类号： H04J14/02 , H04B10/25
摘要： Methods, systems, and apparatus for subcarrier modulation with radio frequency inphase-quadrature (IQ) modulators. A system includes a plurality of IQ modulators, each configured to receive an input electrical signal comprising an inphase signal and a quadrature signal, and each configured to modulate the inphase signal and quadrature signal based on one of a plurality of local oscillator signals to output a multiplexed signal. Each of the plurality of local oscillator signals is supplied by a respective one of a plurality of local oscillator circuits. A modulator circuit is configured to modulate a carrier optical signal from a laser having a frequency ωc based on the multiplexed signal to generate a modulated optical signal centered at frequency ωc and comprising a plurality of subcarriers. A center frequency of each of the plurality of subcarriers is offset from ωc by a frequency of said one of the plurality of local oscillator signals.

8. 发明授权

US11838052B2 Out-of-band communication channel for subcarrier-based optical communication systems 有权
公开(公告)号：US11838052B2
公开(公告)日：2023-12-05
申请号：US17561768
申请日：2021-12-24
申请人： Infinera Corporation
发明人： Steven J. Hand
IPC分类号： H04B10/00 , H04B10/27 , H04J14/02
CPC分类号： H04B10/27 , H04J14/0227
摘要： An example system includes a hub transceiver and a plurality of edge transceivers. The hub transceiver is operable to transmit, over a first communications channel, a first message to each of the edge transceivers concurrently, including an indication of available network resources on an optical communications network. Each of the edge transceiver is operable to transmit, transmit, over a second communications channel, a respective second message to the hub transceiver including an indication of a respective subset of the available network resources selected by the edge transceiver for use in communicating over the optical communications network. Further, the edge transceiver is operable to receive, from the hub transceiver, a third message acknowledging receipt of a selection and a fourth message confirming an assignment of the selected subset of the available network resources to the edge transceiver.

9. 发明公开

US20230388041A1 Clock Recovery for Digital Subcarriers for Optical Networks 审中-公开
公开(公告)号：US20230388041A1
公开(公告)日：2023-11-30
申请号：US17752832
申请日：2022-05-24
申请人： Infinera Corporation
发明人： Jeffrey T. Rahn , Kuang-Tsan Wu , Steven Joseph Hand , Han Henry Sun
IPC分类号： H04J14/02 , H04Q11/00
CPC分类号： H04J14/0246 , H04J14/0282 , H04Q11/0067
摘要： Optical network systems and components are disclosed, including a transmitter comprising a digital signal processor that receives data; circuitry that generate a plurality of electrical signals based on the data; a plurality of filters, each of which receiving a corresponding one of the plurality of electrical signals, a plurality of roll-off factors being associated with a respective one of the plurality of filters; a plurality of DACs that receive outputs from the digital signal processor, the outputs being indicative of outputs from the plurality of filters; a laser that supplies light; and a modulator that receives the light and outputs from the DACs, and supplies a plurality of optical subcarriers based on the outputs, such that one of the optical subcarriers has a frequency bandwidth that is wider than remaining ones of the optical subcarriers, said one of the optical subcarriers carrying information for clock recovery.

10. 发明授权

US11743621B2 Network switches systems for optical communications networks 有权
公开(公告)号：US11743621B2
公开(公告)日：2023-08-29
申请号：US17069818
申请日：2020-10-13
申请人： Infinera Corporation
发明人： Tulasi Veguru , David F. Welch , Mats Plantare , Prasad Paranjape , Ting-Kuang Chiang , Gus Elmer
IPC分类号： H04Q11/00
CPC分类号： H04Q11/0067 , H04Q11/0005 , H04Q2011/0016 , H04Q2011/0081 , H04Q2011/0086 , H04Q2011/0088
摘要： Optical subcarriers may be employed to transmit data in a point-to-multi-point network whereby a hub node including a network switch receives such data from a client and transmits information indicative of such data to multiple leaf or network nodes, where data intended for such leaf node is output. Often the rate at which data is supplied to the hub node is different than the rate at which information indicative of the data is transmitted. Moreover, the client data may have a format that is different than that associated with the transmitted information indicative of the client data. Consistent with the present disclosure, client data is inverse multiplexed to lower data rate streams and then multiplexed to a plurality of inputs, each of which corresponding to a respective optical subcarrier. Information indicative of the data may be allocated to multiple subcarriers, if the a single carrier lacks sufficient capacity or bandwidth to meet the bandwidth requirements of the leaf node. Buffer circuits may also be employed to “shape” or delay the outputs or flows of the multiplexer so that data is fed, for example, to a transmit portion of chip 200b of the network switch at a uniform rate rather than in non-uniform data bursts, which, under certain circumstances, could exceed the capacity of such transmit portion. In a further example, leaf nodes include circuitry for monitoring the amount of received data, and, if such received exceeds a certain threshold, a request is sent from the leaf node to the hub to transmit data at a rate equal to or substantially equal to the received data rate. As a result, symmetric data flows may be achieved whereby the leaf nodes transmit and receive data at the same or substantially the same rate.

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