REDUCING PROCESSING COMPLEXITY AND COST ASSOCIATED WITH A SOFT FORWARD ERROR CORRECTION (FEC) OPERATION
Granted: October 3, 2013
Application Number:
20130262954
A system is configured to receive a word on which to perform forward error correction; identify least reliable positions that correspond to encoded bits, within the word, associated with a lowest level of reliability; generate candidate words based on different combinations of inverted encoded bits; identify a pair of candidate words that includes a candidate word and another candidate word, the candidate word includes an inverted most reliable bit of the encoded bits within the…
FORWARD ERROR CORRECTION (FEC) CONVERGENCE BY CONTROLLING RELIABILITY LEVELS OF DECODED WORDS IN A SOFT FEC DECODER
Granted: July 4, 2013
Application Number:
20130173984
A system receives a first word on which to perform error correction; identifies combinations in which encoded bits, within the first word, can be inverted; generates candidate words based on the first word and the combinations; decodes the candidate words; determines distances between the decoded words and the first word; selects, as a second word, one of the decoded words associated with a shortest distance; compares the second word to the first word to identify errors within the first…
PHASE-MODULATED TRANSMISSION CONTROL USING EMBEDDED CONTROL SYMBOLS
Granted: July 4, 2013
Application Number:
20130170831
A system receives a phase-modulated signal that carries client symbols and a sequence that includes first symbols on which a first tone is to be based and having a first power level, and second symbols on which a second tone is to be based and having a second power level; processes the sequence to generate the first tone and the second tone; determines a power difference based on the first power level and the second power level; retrieves condition information that identifies a threshold…
SUPER OPTICAL CHANNEL DATA UNIT SIGNAL SUPPORTED BY MULTIPLE WAVELENGTHS
Granted: May 2, 2013
Application Number:
20130108273
A node is configured to receive first optical channel data unit (ODU) signals; encapsulate the first ODU signals into a second ODU signal; distribute data of the second ODU signal to a group of third ODU signals; encapsulate each of the third ODU signals into a respective optical channel transport unit (OTU) signal; and transmit each of the OTU signals on a respective optical channel of a group of optical channels. Each optical channel, of the group of optical channels, has a…
SUPER OPTICAL CHANNEL TRANSPORT UNIT SIGNAL SUPPORTED BY MULTIPLE WAVELENGTHS
Granted: May 2, 2013
Application Number:
20130108268
A node is configured to receive first optical channel data unit (ODU) signals; encapsulate one or more of the first ODU signals into a second ODU signal; encapsulate the second ODU signal into an optical channel transport unit (OTU) signal; and transmit the OTU signal on one or more optical channels.
SUPER-CHANNEL ASSIGNMENT USING A FLEXIBLE GRID
Granted: April 4, 2013
Application Number:
20130084075
A node is configured to receive an instruction to establish a channel having a bandwidth that corresponds to an operating spectrum an optical fiber; obtain information that identifies a channel spacing and a pointer that identifies where, within the spectrum, to establish bandwidth allocations; identify a group of bandwidth segments based on the spectrum and the channel spacing; and generate bit words that correspond to the bandwidth allocations, where the bit words includes bits that,…
HEAT TRANSFER USING A DURABLE LOW-FRICTION INTERFACE
Granted: March 28, 2013
Application Number:
20130077253
A system includes a removable module to process data when installed in the system, where the module includes a first surface via which heat, that is generated by the module, is transferred. The system also includes a port into which the module is installed; and a heat sink, associated with the port, to dissipate the heat received from the first surface, where the heat sink includes a second surface on which a material is applied, and where the material makes contact with the first…
USING EVENTS DATA
Granted: March 14, 2013
Application Number:
20130066679
A computer device receives a list of events, and generates possible outcomes of the events. Each one of the possible outcomes indicates which ones of the events occur and which ones of the events do not occur. The computer device receives a request for forecast information for an item associated with two or more of the events. The computer device further retrieves data, from the possible outcomes, for the item. The computer device generates the forecast, for the item, based on the data.…
COOLING DEVICE INSTALLATION USING A RETAINER ASSEMBLY
Granted: January 31, 2013
Application Number:
20130027889
A system includes a retainer assembly to align each of a group of cooling devices with a corresponding electrical component of a group of electrical components that are mounted to a circuit board, where the retainer assembly includes a group of apertures, such that each of the cooling devices protrudes through a corresponding aperture when the retainer assembly is installed on the circuit board, and where the retainer assembly includes a group of retaining springs, each of which is…
COHERENT DETECTION USING COHERENT DECODING AND INTERLEAVING
Granted: January 24, 2013
Application Number:
20130022147
A system is configured to receive a block of symbols, associated with a phase-modulated signal that includes data symbols that correspond to a payload associated with the signal, and control symbols; process the control symbols to identify an amount of phase noise associated with the control symbols; reset a phase, associated with each of the data symbols, based on the amount of phase noise and a reference phase; interleave the respective data samples, of each of the data symbols with…
ADAPTIVE VOLTAGE SCALING BASED ON THE RESULTS OF FORWARD ERROR CORRECTION PROCESSING
Granted: January 3, 2013
Application Number:
20130007516
In one implementation, a device may include a voltage regulator circuit, a data processing circuit, and an error correction circuit, where the error correction circuit may correct errors in data processed by the data processing circuit to obtain error-corrected data and output an error-corrected version of the processed data. Additionally, an error monitor circuit may output an error signal indicative of a level of the errors in the processed data. A control circuit may receive the error…
CHANNEL DE-SKEWING FOR A COHERENT OPTICAL RECEIVER
Granted: January 3, 2013
Application Number:
20130004158
A system may receive a group of electrical signals from an optical receiver and via a group of channels; identify a first signal, as a reference signal, that is received via a first channel; and identify a second signal, as an orthogonal signal, that is received via a second channel, where the second signal may be orthogonal to the first signal. The system may further measure a group of skew values based on a difference in arrival times between one or more other signals, of the group of…
DISTRIBUTING CONTROL PLANE PROCESSING
Granted: January 3, 2013
Application Number:
20130003753
A network device includes shelf controllers and interface unit controllers. An interface unit controller, of the interface unit controllers, is configured to receive a message from a different network device; determine whether a session exists for the message; identify a shelf controller, of the shelf controllers, based on the session when the session exists for the message; select the shelf controller, to receive the message, based on a load or mapping of the shelf controller when the…
FORWARD CARRIER RECOVERY USING FORWARD ERROR CORRECTION (FEC) FEEDBACK
Granted: December 27, 2012
Application Number:
20120328305
A system receive, from an optical receiver, a signal derived from a first optical signal and a second optical signal generated by a local oscillator, that includes a first component that is an in-phase component and a second component that is a quadrature phase component; filter the signal, using a filter, set to one or more configurations, to obtain one or more recovered signals, where each of the recovered signals includes a respective quantity of noise; perform forward error…
IN-BAND CONTROL PLANE AND MANAGEMENT FUNCTIONALITY IN OPTICAL LEVEL ONE VIRTUAL PRIVATE NETWORKS
Granted: September 29, 2011
Application Number:
20110236018
A method performed by an optical node, operating as a first network edge device of an optical layer one virtual private network (L1VPN), includes generating, by a first module of the optical node, a first optical data frame, where the first optical data frame includes an L1VPN overhead, and where the L1VPN overhead includes a control plane communication field; generating, by a second module of the optical node, a first control plane message for a second network edge device of the optical…
FAST PROTECTION PATH ACTIVATION USING CONTROL PLANE MESSAGES
Granted: March 31, 2011
Application Number:
20110075549
A method, performed in a network that includes a group of nodes, includes identifying a path through a set of the nodes, where each node, in the set of nodes, has a data plane and a control plane; establishing a control plane tunnel, associated with the path, within the control plane of the nodes in the set of nodes; establishing a data plane tunnel, associated with the path, within the data plane of the nodes in the set of nodes, where the data plane tunnel is associated with the…
FLAT-TOP RESPONSE ARRAYED WAVEGUIDE GRATING
Granted: September 30, 2010
Application Number:
20100247036
An optical system is disclosed. The optical system includes first and second waveguides, a first dispersive element, and a coupler. The first waveguide is configured to support a first mode and a second mode of an optical input signal. The second mode being of a higher order than the first mode. The second waveguide has an input and an output and is configured to receive a portion of the optical input signal. The first dispersive element is disposed along a length of one of the first or…
OPTICAL MODE COUPLER
Granted: September 30, 2010
Application Number:
20100247037
An optical coupler includes a first waveguide configured to supply a first optical signal having a wavelength and a second waveguide. The first optical signal having a first mode. The first waveguide has a tapered portion being spaced from the second waveguide by a distance sufficient to facilitate evanescent coupling of the first optical signal from the first waveguide to the second waveguide. A first effective refractive index of the first waveguide at a location in the tapered portion…
DUAL ASYNCHRONOUS MAPPING OF CLIENT SIGNALS OF ARBITRARY RATE
Granted: January 21, 2010
Application Number:
20100014861
A network may include an ingress node that is configured to receive a client signal having a client rate that is one of a multiple different client rates, asynchronously map the client signal into a first frame of a first rate, asynchronously map the first frame into a second frame of a second rate, and output the second frame on the network; an intermediate node that is configured to receive the second frame, recover the first frame from the second frame, asynchronously map the first…
MONOLITHIC TRANSMITTER PHOTONIC INTEGRATED CIRCUIT (TXPIC) HAVING TUNABLE MODULATED SOURCES WITH FEEDBACK SYSTEM FOR SOURCE POWER LEVEL OR WAVELENGTH TUNING
Granted: June 12, 2008
Application Number:
20080138088
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated…
