公开(公告)号：US20170228645A1

公开(公告)日：2017-08-10

申请号：US15423360

申请日：2017-02-02

Applicant: NEC Laboratories America, Inc.

Inventor： Linnan WANG ,  Yi YANG ,  Renqiang MIN ,  Srimat CHAKRADHAR

IPC: G06N3/08 ,  G06N3/04

CPC classification number: G06N3/08 ,  G06N3/04 ,  G06N3/0454 ,  G06N3/084

Abstract: Aspects of the present disclosure describe techniques for training a convolutional neural network using an inconsistent stochastic gradient descent (ISGD) algorithm. Training effort for training batches used by the ISGD algorithm are dynamically adjusted according to a determined loss for a given training batch which are classified into two sub states—well-trained or under-trained. The ISGD algorithm provides more iterations for under-trained batches while reducing iterations for well-trained ones.

公开(公告)号：US09722720B2

公开(公告)日：2017-08-01

申请号：US14811268

申请日：2015-07-28

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Karthikeyan Sundaresan ,  Sampath Rangarajan

IPC: H04B7/04 ,  H04J11/00 ,  H04B7/024

CPC classification number: H04J11/005 ,  H04B7/024

Abstract: A method, system, and computer program product for minimizing intra-cell and inter-cell interference in a multi-cell full duplex communication system in a wireless network. The method includes selecting, by a client selector, a plurality of clients, wherein the plurality of clients includes a plurality of uplink clients configured to transmit signals and a plurality of downlink clients configured to receive signals over a plurality of data streams in each cell of the multi-cell full duplex communication system, and performing, by a spatial interference aligner, spatial interference alignment on interfering data streams to align the interfering data streams of uplink clients towards downlink clients in its own cell and downlink clients in a neighboring cell.

公开(公告)号：US09720597B2

公开(公告)日：2017-08-01

申请号：US14603813

申请日：2015-01-23

Applicant: NEC Laboratories America, Inc.

Inventor： Cheng-Hong Li ,  Giuseppe Coviello ,  Kunal Rao ,  Murugan Sankaradas ,  Srihari Cadambi ,  Srimat Chakradhar ,  Rajat Phull

IPC: G06F12/00 ,  G06F3/06 ,  G06F9/50

CPC classification number: G06F3/061 ,  G06F3/0656 ,  G06F3/0673 ,  G06F9/50 ,  G06F12/023

Abstract: Systems and methods for swapping out and in pinned memory regions between main memory and a separate storage location in a system, including establishing an offload buffer in an interposing library; swapping out pinned memory regions by transferring offload buffer data from a coprocessor memory to a host processor memory, unregistering and unmapping a memory region employed by the offload buffer from the interposing library, wherein the interposing library is pre-loaded on the coprocessor, and collects and stores information employed during the swapping out. The pinned memory regions are swapped in by mapping and re-registering the files to the memory region employed by the offload buffer, and transferring data of the offload buffer data from the host memory back to the re-registered memory region.

公开(公告)号：US20170212238A1

公开(公告)日：2017-07-27

申请号：US15385961

申请日：2016-12-21

Applicant: NEC Laboratories America, Inc.

Inventor： Giovanni Milione

IPC: G01S17/58 ,  G01S17/66

CPC classification number: G01S17/58 ,  G01S17/66

Abstract: A system for sensing a remote object includes a light beam for illuminating the remote object; a sensor to determine an orbital angular momentum (OAM) of the light beam; and a processor with code to determine the remote object's direction of lateral motion.

公开(公告)号：US20170211970A1

公开(公告)日：2017-07-27

申请号：US15385972

申请日：2016-12-21

Applicant: NEC Laboratories America, Inc.

Inventor： Giovanni Milione ,  Philip Nan Ji ,  Ezra Ip ,  Ting Wang

IPC: G01H9/00

CPC classification number: G01H9/004

Abstract: A system to perform distributed acoustic sensing (DAS) in an environment with acoustic vibrations present includes at least an optical fiber positioned in said environment, wherein the optical fiber comprises N spatial channels and N laser pulses are launched into the N spatial channels of the optical fiber and propagate over a fiber length; and one or more sensors to measure N signals of acoustic vibration amplitude and frequency from each of N spatial channels, wherein the N signals are digitally added for spatial averaging and applied to determine DAS.

公开(公告)号：US20170201462A1

公开(公告)日：2017-07-13

申请号：US15470178

申请日：2017-03-27

Applicant: AT&T Intellectual Property I, L.P. ,  NEC Laboratories America, Inc.

Inventor： Lusheng Ji ,  Chonggang Wang ,  Ting Wang

IPC: H04L12/823 ,  H04L12/801 ,  H04L12/26 ,  H04L12/851

CPC classification number: H04L47/32 ,  H04L12/56 ,  H04L43/08 ,  H04L47/11 ,  H04L47/24 ,  H04L47/35 ,  H04W40/12 ,  H04W84/18 ,  Y02D70/00 ,  Y02D70/22 ,  Y02D70/34

Abstract: Data is routed in a mesh network of devices that can communicate wirelessly through a plurality of technologies. One or more of such devices receive broadcast message(s) from a destination device intended to receive the data, and generate a first radio link quality metric (RLQM) value based on the broadcast message(s). A source device originates and delivers a quantum of data with an embedded first RLQM value. A set of intermediate devices relays the quantum of data if a forwarding criterion is fulfilled; the forwarding criterion is based in part on the first RLQM value and a second RLQM value generated by an intermediate device in the set of intermediate devices based on the broadcast message(s). The intermediate device exploits an optical interface to transmit the quantum of data. The destination device broadcasts an acknowledgement signal in response to receiving intended data.

公开(公告)号：US20170161109A1

公开(公告)日：2017-06-08

申请号：US15362439

申请日：2016-11-28

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Rajesh Mahindra ,  Sampath Rangarajan ,  Karthikeyan Sundaresan

IPC: G06F9/50 ,  H04L29/08

CPC classification number: G06F9/505 ,  G06F9/5061 ,  H04L67/10 ,  H04L67/1031

Abstract: Computer-implemented methods and a system are provided for distributing tasks between a plurality of processes in a computer network. A method includes distributing, by a load balancer in the computer network, tasks between the plurality of processes. The method further includes maintaining, by the load balancer, a registry for each of the tasks. For a given task, the registry indicates which of the plurality of processes to which the given task is distributed based on a hash function. The method also includes forming, by the load balancer, a respective set of registries for each of the plurality of processes, based on a set of thresholds. The method additionally includes redefining, by the load balancer, the set of thresholds when one of the plurality of processes ceases or a new process, added to the plurality of processes, commences.

公开(公告)号：US09652247B2

公开(公告)日：2017-05-16

申请号：US14572261

申请日：2014-12-16

Applicant: NEC Laboratories America, Inc.

Inventor： Cheng-Hong Li ,  Giuseppe Coviello ,  Srimat Chakradhar ,  Arash Rezaei

IPC: G06F9/44 ,  G06F9/38 ,  G06F11/14 ,  G06F9/30 ,  G06F9/48

CPC classification number: G06F9/3863 ,  G06F9/3009 ,  G06F9/3877 ,  G06F9/4856 ,  G06F11/1438 ,  G06F11/1446 ,  G06F11/203 ,  G06F11/2043 ,  G06F2201/825 ,  G06F2201/84 ,  G06F2209/509

Abstract: Methods are provided. A method for swapping-out an offload process from a coprocessor includes issuing a snapify_pause request from a host processor to the coprocessor to initiate a pausing of the offload process executing by the coprocessor and another process executing by the host processor using a plurality of locks. The offload process is previously offloaded from the host processor to the coprocessor. The method further includes issuing a snapify_capture request from the host processor to the coprocessor to initiate a local snapshot capture and saving of the local snapshot capture by the coprocessor. The method also includes issuing a snapify_wait request from the host processor to the coprocessor to wait for the local snapshot capture and the saving of the local snapshot capture to complete by the coprocessor.

公开(公告)号：US20170132523A1

公开(公告)日：2017-05-11

申请号：US15340255

申请日：2016-11-01

Applicant: NEC Laboratories America, Inc.

Inventor： Hui Zhang ,  Haifeng Chen ,  Jianwu Xu ,  Kenji Yoshihira ,  Guofei Jiang

IPC: G06N5/04 ,  G06N99/00

CPC classification number: G06N5/047 ,  G06N20/00

Abstract: Systems and methods are disclosed for detecting periodic event behaviors from machine generated logging by: capturing heterogeneous log messages, each log message including a time stamp and text content with one or more fields; recognizing log formats from log messages; transforming the text content into a set of time series data, one time series for each log format; during a training phase, analyzing the set of time series data and building a category model for each periodic event type in heterogeneous logs; and during live operation, applying the category model to a stream of time series data from live heterogeneous log messages and generating a flag on a time series data point violating the category model and generating an alarm report for the corresponding log message.

公开(公告)号：US20170132278A1

公开(公告)日：2017-05-11

申请号：US15340341

申请日：2016-11-01

Applicant: NEC Laboratories America, Inc.

Inventor： Junghwan Rhee ,  Jianwu Xu ,  Hui Zhang ,  Guofei Jiang

IPC: G06F17/30

CPC classification number: G06F16/2425 ,  G06F16/116 ,  G06F16/2455

Abstract: Systems and methods are disclosed for analyzing logs generated by a machine by analyzing a log and identifying one or more abstract landmark delimiters (ALDs) representing delimiters for log tokenization; from the log and ALDs, tokenizing the log and generating an increasingly tokenized format by separating the patterns with the ALD to form an intermediate tokenized log; iteratively repeating the tokenizing of the logs until a last intermediate tokenized log is processed as a final tokenized log; and applying the tokenized logs in applications.