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131.发明授权公开(公告)号：US09866442B2
公开(公告)日：2018-01-09
申请号：US14699228
申请日：2015-04-29
Applicant: NEC Laboratories America, Inc.
Inventor： Ankitkumar Patel , Philip Nan Ji , Ting Wang
CPC classification number: H04L41/12 , H04J14/0227 , H04J14/0257 , H04J14/0271 , H04L41/22
Abstract: Methods and systems for embedding VI demands in a software-defined network include mapping virtual nodes over physical nodes in a network topology. An auxiliary graph including virtual links between physical nodes that have a residual capacity sufficient to meet a virtual infrastructure demand is constructed. Virtual links over physical links are mapped to maximize use of existing optical channels and to minimize switching of a virtual link between a wavelength division multiplexing layer and an IP layer. New optical channels with a maximum spectral efficiency are established. A set of potential solutions for embedding a set of virtual infrastructure demands is determined. A solution is selected from the set of potential solutions that maximizes a weighted average of spectrum needed to support the set of virtual infrastructure demands and a cost of provisioning the virtual infrastructure demands.
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公开(公告)号：US09813155B2
公开(公告)日：2017-11-07
申请号：US15385944
申请日：2016-12-21
Applicant: NEC Laboratories America, Inc.
Inventor： Giovanni Milione , Philip Nan Ji , Ezra Ip , Shaoliang Zhang , Yue-Kai Huang , Ting Wang
IPC: H04B10/00 , H04B10/25 , H04J14/02 , H04J14/06 , H04L5/14 , H04B10/40 , H04B7/0413 , H04B10/2581 , H04J14/00
CPC classification number: H04B10/2503 , H04B7/0413 , H04B10/2581 , H04B10/40 , H04J14/02 , H04J14/06 , H04L5/14
Abstract: Systems and methods for optical communication are disclosed that include communicating data using one or more transceiver pairs coupled to a spatial-multiplexer (S-MUX); performing bi-directional transmissions over an elliptical core optical fiber to a spatial-demultiplexer (S-DEMUX) using spatial modes to communicate data in either direction between two transceiver pairs with low crosstalk and without optical circulators or wavelength-division multiplexing (WDM); and communicating data from the S-DEMUX with g one or more transceiver pairs.
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公开(公告)号：US09784567B2
公开(公告)日：2017-10-10
申请号：US14842542
申请日：2015-09-01
Applicant: NEC Laboratories America, Inc.
CPC classification number: G01B11/168 , G01K11/32 , G01K2011/322
Abstract: Methods and systems for sensing conditions of a fiber include splitting a light signal into two branches. A first branch is converted to have a mode different from that of the second branch. Both branches are mode multiplexed into a single fiber. An output of the fiber is mode demultiplexed into the two branches. The first branch is mode converted to its original mode. Brillouin scattering patterns of the two branches are compared to determine a temperature and strain profile of the fiber.
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134.发明授权公开(公告)号：US09742526B2
公开(公告)日：2017-08-22
申请号：US14504428
申请日：2014-10-02
Applicant: NEC Laboratories America, Inc.
Inventor： Ivan Djordjevic , Ting Wang
CPC classification number: H04L1/0041 , H03M13/00 , H03M13/255 , H04B10/516 , H04B10/6163 , H04L1/005 , H04L1/0058 , H04L25/067 , H04L27/3405
Abstract: A method to process applicable to coherent optical channels with either linear or nonlinear phase noise includes: splitting a received sequence of data into clusters of points according to a cumulative log-likelihood function from constellation obtained in a previous iteration; generating new constellation points by calculating a center of mass of the clusters of points; repeating until convergence or until a predetermined number of iterations has been reached to determine a signal constellation; and transmitting signals over the coherent optical channels with nonlinear phase noise using the disclosed signal constellation and LDPC-coded modulation concepts.
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公开(公告)号：US09729230B2
公开(公告)日：2017-08-08
申请号：US14808414
申请日：2015-07-24
Applicant: NEC Laboratories America, Inc.
Inventor： Shaoliang Zhang , Fatih Yaman , Yue-Kai Huang , Ting Wang
IPC: H04B17/00 , H04B10/077 , G02F1/01 , H04B10/564
CPC classification number: H04B10/0775 , G02F1/0123 , H04B10/50575 , H04B10/564 , H04B2210/075
Abstract: A system for centralized automatic bias control for a plurality of modulators, including a coupler for coupling output of each of the plurality of modulators to generate a combined modulator output. A pilot insertion device inserts a pilot tone into each of the plurality of modulators such that a different pilot tone frequency is inserted for each of the plurality of modulators. A monitoring device iteratively monitoring power (Pt) of each inserted pilot tone over time to determine whether a current modulator bias is optimal for each of the plurality of modulators, and an adjuster device iteratively adjusts the modulator bias for each of the plurality of modulators for which the current modulator bias is determined to be sub-optimal until a threshold condition has been met.
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Patent Agency Ranking
公开(公告)号：US09722700B2
公开(公告)日：2017-08-01
申请号：US14807446
申请日：2015-07-23
Applicant: NEC Laboratories America, Inc. , NEC Corporation
Inventor： Fatih Yaman , Shaoliang Zhang , Ting Wang , Yoshihisa Inada , Takaaki Ogata
IPC: H04B17/00 , H04B10/079 , H04J14/02
CPC classification number: H04B10/07957 , H04B10/07955 , H04J14/0221
Abstract: A wavelength division multiplexing system and method featuring a wavelength monitor that is configured to receive a portion of a combined signal of wavelength division multiplexing channels and determine the wavelengths of each channel or the guardband between each channel in the combined signal. The wavelength monitor determines if there is excess laser drift for each channel in the combined signal. If excess laser drift is determined, feedback is sent to the transmitter for the signal with excess laser drift and the signal is adjusted to produce a target wavelength. The wavelength monitor may utilize optical intradyning in order to monitor the wavelengths of each channel in the combined signal.
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公开(公告)号：US09720075B2
公开(公告)日：2017-08-01
申请号：US14946304
申请日：2015-11-19
Applicant: NEC Laboratories America, Inc.
Inventor： Giovanni Milione , Neda Cvijetic , Ting Wang
CPC classification number: G01S7/4818 , G01J4/04 , G01S7/4802 , G01S7/4814 , G01S7/4816 , G01S7/499
Abstract: A system and method for remote object sensing which features a spatially polarization-inhomogeneous light beam that is directed on the remote object. A polarimetry receiver receives the light beam after it contacts the remote object. The changes in the spatially polarization-inhomogeneous light beam from contacting the remote object are a result of spatial features of the remote object. The polarimetry receiver is configured to measure the spatially inhomogeneous electric field of the light beam after it contacts the remote object and compute the changes in the spatially polarization-inhomogeneous light beam in order to detect spatial features of the remote object. The system obtains high-resolution, real-time information concerning important spatial features of the remote object.
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公开(公告)号：US20170214465A1
公开(公告)日：2017-07-27
申请号：US15131307
申请日：2016-04-18
Applicant: NEC Laboratories America, Inc.
Inventor： Giovanni Milione , Ezra Ip , Ting Wang
IPC: H04B10/2581 , H04J14/00 , H04B10/40 , H04B10/516 , H04Q11/00 , H04B10/50
CPC classification number: H04B10/2581 , H04B10/40 , H04B10/503 , H04B10/516 , H04J14/00 , H04Q11/0005 , H04Q2011/0015
Abstract: Methods and system for transmitting data includes converting multiple optical beams to distinct respective spatial modes. Data is modulated onto each of the optical beams. The optical beams are combined into a single transmission beam. The transmission beam is launched onto a multimode optical fiber having an elliptical core.
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公开(公告)号：US20170115218A1
公开(公告)日：2017-04-27
申请号：US15269586
申请日：2016-09-19
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Lei Tao , Yue Tian , Ting Wang
CPC classification number: G01N21/59 , B60R11/04 , B64B1/40 , B64C39/024 , B64C2201/12 , G01N33/0062 , G01N2021/1795 , G01N2201/061 , G01N2201/06113 , G01N2201/0612 , G01N2201/062 , G01N2201/0636 , G01S3/786 , G01S7/4802 , G01S17/06 , G01S17/66 , G01S17/88 , G01S19/13
Abstract: Systems and methods for generating a three-dimensional gas map includes a remote vehicle including reflective material. A positioning stage including multidimensional movement to track the remote vehicle. A light head to reflect light off of the remote vehicle. A controller to analyze received light to determine gas content and generate a three-dimensional gas map.
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140.发明授权公开(公告)号：US09609400B2
公开(公告)日：2017-03-28
申请号：US14465122
申请日：2014-08-21
Applicant: NEC Laboratories America, Inc.
Inventor： Konstantinos Kanonakis , Junqiang Hu , Ankitkumar Patel , Philip Ji , Ting Wang
CPC classification number: H04Q11/00 , H04L12/40136 , H04Q2213/13103 , H04Q2213/13292 , H04Q2213/13389 , Y02D50/10
Abstract: Systems and methods for data transport, including receiving one or more signals into a reconfigurable and flexible rate shared rate multi-transponder network architecture, wherein the network architecture includes one or more transponders with multiple line side interfaces and one or more client side interfaces. The transponders are configured to map one or more signals to multiple parallel Virtual Ethernet Links, remove idle characters from the one or more signals, buffer one or more blocks of characters using an intermediate block buffer, activate and deactivate one or more portions of input/output electrical lanes of an Ethernet module, multiplex and demultiplex the one or more signals to and from the input/output electrical lanes to enable sharing of a single optical transceiver by multiple independent signals, and insert blocks of idle characters to enable transmission over a lower rate transmission pipe.
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