Transmission impairment compensation in point-to-multipoint communication systems
Granted: April 2, 2024
Patent Number:
11950031
Systems and methods for performing impairment compensation in point-to-multi-point communication systems are described. In a data snapshot mode, a hub node can send instructions to each communication node connected to the hub node to send a data snapshot of data being received and processed by the communication nodes at a particular time. In a trench line mode, a hub node sends instructions to each communication node to send trench line data back to the hub node. The hub node uses the…
Observability without changing the target
Granted: March 26, 2024
Patent Number:
11943121
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…
Fast scan method and apparatus for beacon auto-tune
Granted: March 26, 2024
Patent Number:
11942997
Consistent with the present disclosure, a local oscillator is provided in a receiver. The local oscillator laser a first and second mirrors and phase section and heaters are provided adjacent each portion of the laser, such that the temperature and thus the frequency of light output from the local oscillator laser may be tuned. Applying electrical power, such as a current or voltage to the phase section may result in rapid frequency tuning of light output from the local oscillator laser…
Optical modules having an improved optical signal to noise ratio
Granted: March 12, 2024
Patent Number:
11929826
Consistent with the present disclosure, a photonic integrated circuit (PIC) is provided that has 2 N channels (N being an integer). The PIC is optically coupled to N optical fibers, such that each of N polarization multiplexed optical signals are transmitted over a respective one of the N optical fibers. In another example, each of the N optical fibers supply a respective one of N polarization multiplexed optical signals to the PIC for coherent detection and processing. A multiplexer and…
Heat transfer in optical transceiver
Granted: February 27, 2024
Patent Number:
11916579
An optical transceiver with a built-in heat transfer structure is described. The heat transfer structure can connect one or more circuit regions of the optical transceiver to a heat sink while bypassing circuit regions that may impede the transfer of heat from the one or more circuit regions. The heat transfer structure may directly contact the one or more circuit regions, and the heat sink and may include an opening to avoid contact with the circuit regions to be bypassed.
Stitching data for analyzing real time systems
Granted: February 20, 2024
Patent Number:
11907249
Methods and systems for stitching real-time and historical data are disclosed herein. The data may be gathered from a line card and represent metrics of hardware or software elements of the line card. The historical data may be transferred and stored in an archive of a control card of a network element and the real-time data may be accessed by a proxy host of the control card substantially in real-time. A network administration device may access the historical data on the file collector…
Optical subcarrier dual-path protection and restoration for optical communications networks
Granted: February 13, 2024
Patent Number:
11901950
An example system includes a first network device having first circuitry. The first network device is configured to perform operations including receiving data to be transmitted to a second network device over an optical communications network, and transmitting first information and second information to the second device. The first information is indicative of the data, and is transmitted using a first communications link of the optical communications network and using a first subset of…
Distribution matching for probabilistic constellation shaping with an arbitrary input/output alphabet
Granted: February 13, 2024
Patent Number:
11902079
Consistent with the present disclosure, an encoder circuit is provided at a transmit side of an optical fiber link that maps an input sequence of bits of fixed length k a sequence of symbols of a codeword of length n, such that the symbols of the codeword define a predetermined transmission probability distribution. Preferably, each symbol of the codeword is generated during a corresponding clock cycle, such that after n clock cycles, a complete codeword corresponding to the input bit…
Optical subcarrier dual-path protection and restoration for optical communications networks
Granted: February 13, 2024
Patent Number:
11901950
An example system includes a first network device having first circuitry. The first network device is configured to perform operations including receiving data to be transmitted to a second network device over an optical communications network, and transmitting first information and second information to the second device. The first information is indicative of the data, and is transmitted using a first communications link of the optical communications network and using a first subset of…
Distribution matching for probabilistic constellation shaping with an arbitrary input/output alphabet
Granted: February 13, 2024
Patent Number:
11902079
Consistent with the present disclosure, an encoder circuit is provided at a transmit side of an optical fiber link that maps an input sequence of bits of fixed length k a sequence of symbols of a codeword of length n, such that the symbols of the codeword define a predetermined transmission probability distribution. Preferably, each symbol of the codeword is generated during a corresponding clock cycle, such that after n clock cycles, a complete codeword corresponding to the input bit…
Clock recovery for digital subcarriers for optical networks
Granted: January 23, 2024
Patent Number:
11881898
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…
Optical subcarrier dual-path protection and restoration for optical communications networks
Granted: January 9, 2024
Patent Number:
11870496
An example system includes a first network device having first circuitry. The first network device is configured to perform operations including receiving data to be transmitted to a second network device over an optical communications network, and transmitting first information and second information to the second device. The first information is indicative of the data, and is transmitted using a first communications link of the optical communications network and using a first subset of…
Method apparatus, and computer readable medium for defining and encoding packets for data exchange over a network
Granted: January 9, 2024
Patent Number:
11868704
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,…
Subcarrier modulation with radio frequency (RF) IQ modulators
Granted: December 26, 2023
Patent Number:
11855754
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…
Bidirectional optical communications
Granted: December 5, 2023
Patent Number:
11838105
This disclosure describes digitally generating sub-carriers (SCs) to provide isolation and dynamic allocation of bandwidth between uplink and downlink traffic between transceivers that are communicatively coupled via a bidirectional link including one or more segments of optical fiber. Separate uplink and downlink communication channels may be created using digitally generated SCs and using the same transmitter laser. In some implementations, one or more of the nodes include a…
Out-of-band communication channel for subcarrier-based optical communication systems
Granted: December 5, 2023
Patent Number:
11838052
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…
SD-FEC defect propagation across regeneration nodes in support of single and multi-carrier super channel protection in ROADM networks
Granted: December 5, 2023
Patent Number:
11838048
A regen node is described. The regen node includes a coherent receiver, a control module and a coherent transmitter. The coherent receiver has circuitry to convert a first optical signal received from an upstream node in an optical layer of an optical network to a first digital data stream in a digital layer having a first FEC frame and a data traffic. The control module extracts a first fault signal from the first FEC frame; generates a second fault signal based at least in part on the…
Subcarrier based data center network architecture
Granted: November 21, 2023
Patent Number:
11824632
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for generating, transmitting, directing, receiving, and processing optical subcarriers. In some implementations, a system includes a Tier 1 switch that supplies a plurality of data channels; a transmitter that receives the plurality of data channels, the transmitter including an optical modulator that supplies a plurality of optical subcarriers based on the plurality of data channels; an…
Frequency division multiple access optical subcarriers
Granted: November 21, 2023
Patent Number:
11824628
A hub node may or have a capacity greater than that of associated leaf nodes. Accordingly, inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, each connection including one or more segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer. Optical subcarriers may be transmitted…
Transmitting and receiving data using a satellite communications network
Granted: November 14, 2023
Patent Number:
11817901
An example apparatus includes an optical transmitter, an optical splitter, lenses, and mirrors. The optical splitter has an input and several outputs. The input of the optical splitter is optically coupled to the transmitter, such that each of the outputs of the optical splitter is operable to supply a corresponding one of a plurality of modulated optical signals, each of which includes a plurality of optical subcarriers. Each of the lenses is optically coupled to a respective one of the…
