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Patent
Publication NumberUS 20200092023Filing StatusPatent ApplicationAvailabilityUnknownFiling Date2019-09-09Publication Date2020-03-19
A network element includes at least two Time Division Multiplexing (TDM) modules each including a TDM client interface, TDM processing circuitry, and circuit emulation circuitry; and a packet switch fabric connected to the at least two TDM modules and configured to output a packet interface, wherein a protected TDM service through the at least two TDM modules is provided as a single packetized TDM stream via the packet interface from the packet switch fabric.
Patent
Publication NumberUS 20200092186Filing StatusPatent ApplicationAvailabilityUnknownFiling Date2018-11-01Publication Date2020-03-19
Systems and methods with a service operating in a network between an originating node and a terminating node include, responsive to detection of a fault on a service, determining a first snapshot of information at each of the originating node and the terminating node; responsive to detection of clearing of the fault, determining a second snapshot of information at each of the originating node and the terminating node; and utilizing the first snapshot of information at each of the originating …
Patent
Publication NumberUS 10594281Filing StatusIssued PatentAvailabilityUnknownFiling Date2019-03-04Publication Date2020-03-17
An automatic gain control system for a receiver for an asymmetrical and/or unbalanced constellation, the system including: an automatic gain control loop adapted to be coupled to both a first transimpedance amplifier coupled to a first analog-to-digital converter forming a first tributary and a second transimpedance amplifier coupled to a second analog-to-digital converter forming a second tributary; wherein the automatic gain control loop is operable for providing an offset gain control volt…
Patent
Publication NumberUS 10594395Filing StatusIssued PatentAvailabilityUnknownFiling Date2018-07-23Publication Date2020-03-17
Systems and methods of compensating for the delay asymmetry of coherent optical modems in a packet optical network include measuring fill levels of one or more queues each including an elastic First-In-First-Out (FIFO) circuit used in a transport mapping scheme, wherein the transport mapping scheme is one or more of client mapping to Optical Transport Unit (OTU) and OTU mapping to Flexible OTN (FlexO); and performing adjustments in a clock based in part on the measured fill levels, wherein th…
Patent
Publication NumberUS 20200081314Filing StatusPatent ApplicationAvailabilityUnknownFiling Date2018-09-10Publication Date2020-03-12
Disclosed herein are architectures for low power, low voltage traveling wave Mach-Zehnder optical modulators. By combining single-ended series push-pull modulator configurations with differential dual-drive modulator configurations, the advantages of each type may be utilized. In particular, the halved capacitance of single-ended series push-pull modulators may reduce microwave losses, thereby improving bandwidth performance within modulator configurations. Moreover, reduced required drive vo…
Patent
Publication NumberUS 20200082013Filing StatusPatent ApplicationAvailabilityUnknownFiling Date2018-09-10Publication Date2020-03-12
Systems and methods of automated feature selection and pattern discovery of multi-variate time-series include obtaining a multi-variate times-series from a network; preprocessing the multi-variate times-series to account for sampling intervals and missing data in the multi-variate times-series; determining a distance matrix for the multi-variate times-series which estimates correlation among features in the multi-variate times-series; performing clustering on the distance matrix; reducing dim…
Patent
Publication NumberUS 10587339Filing StatusIssued PatentAvailabilityUnknownFiling Date2018-11-27Publication Date2020-03-10
Systems and methods of optical restoration include, in an optical network with a photonic service operating between two nodes via an associated optical modem at each node, wherein each modem is capable of supporting variable capacity, C1, C2, . . . , CN where C1>C2> . . . >CN, detecting a fault on a home route of the photonic service while the photonic service operates at a home route capacity CH, CH is one of C1, C2, . . . , CN−1; downshifting the photonic service to a restoration route capa…
Patent
Publication NumberUS 10587358Filing StatusIssued PatentAvailabilityUnknownFiling Date2019-02-28Publication Date2020-03-10
An optical transmitter is operative to generate, from a plurality of encoded client bits, a set of symbols exhibiting non-uniform visitation probabilities in at least one dimension, to encode the set of symbols across a plurality of frequency division multiplexing (FDM) subcarriers, and to transmit an optical signal comprising the plurality of FDM subcarriers across which the set of symbols is encoded. An optical receiver is operative to decode a set of symbol estimates from a plurality of FD…
Patent
Publication NumberUS 20200073154Filing StatusPatent ApplicationAvailabilityUnknownFiling Date2019-08-29Publication Date2020-03-05
A silicon photonics modulator includes a rib that is a PN junction; a slab including a P doped region adjacent to the waveguide core on a first side and an N doped region adjacent to the waveguide core on a second side, opposite the first side; and a first electrode connected to the P-doped region and a second electrode connected to the N-doped region, wherein the rib is dimensioned to support guiding of a Transverse Magnetic (TM) mode with a main lobe that propagates orthogonal to the slab. …
Patent
Publication NumberUS 20200076499Filing StatusPatent ApplicationAvailabilityUnknownFiling Date2018-09-04Publication Date2020-03-05
An optical node includes one or more Optical Add/Drop Multiplexer (OADM) devices which each form a respective degree connected to an associated Optical Multiplex Section (OMS) section of a cascaded optical network including a plurality of OMS sections; and a channel holder source connected to the OADM devices, wherein the OADM device is configured to detect a local fault affecting one or more traffic signals and switch to the channel holder source to provide a respective channel holder the on…
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