Patents Assigned to NEC (China) Co., Ltd.
  • Publication number: 20140028442
    Abstract: A method and apparatus for occupation detection includes: estimating locations of detected objects in a segmented detection region at a current time to acquire an estimation result, and transforming each of the acquired estimation results to a corresponding binary matrix, acquiring at least one candidate matrix at the current time according to the acquired binary matrices, and performing difference estimation on each of the candidate matrices at the current time according to output probabilities at the current time of at least one binary sensor deployed in the detection region; and selecting at least one condition-compliant matrix from the candidate matrices at the current time according to the estimation results, and using the selected matrix as an occupation detection result at the current time.
    Type: Application
    Filed: April 25, 2013
    Publication date: January 30, 2014
    Applicant: NEC (China) Co., Ltd.
    Inventors: Lu Yu, Lei Song, Changjian Hu, Kai Zhao
  • Publication number: 20130344913
    Abstract: The present invention provides a method and apparatus for determining a transmission power of a secondary transmitter in a hierarchical spectrum sharing system. The method can comprise steps of obtaining channel quality information on a primary link from at least one primary receiver within a transmission range of the secondary transmitter; and determining the transmission power for the secondary transmitter based on the channel quality information, wherein the transmission power is matched with the channel quality indicated by the channel quality information. According to the embodiments of the present invention, a power control scheme is applied to the secondary transmitter based on the channel quality information on the primary link. In such a way, the secondary transmitter' throughput can be improved with controllable rate loss to the primary receiver and accordingly the spectrum efficiency for the whole system can be further upgraded.
    Type: Application
    Filed: September 16, 2011
    Publication date: December 26, 2013
    Applicant: NEC (CHINA) CO., LTD.
    Inventors: Chaofeng Li, Lei Jiang, Ming Lei
  • Publication number: 20130345976
    Abstract: A method and apparatus are provided for planning a route of an electric vehicle so as to give a globally optimal route over which the electric vehicle travels and to enable the electric vehicle to prepare for a next trip upon arrival at a destination. The method includes: determining location information of respective candidate charging stations and respective sequences of candidate charging stations according to acquired location information of an origin and location information of a destination as predetermined, charging facility information of the destination and an initial amount of power; calculating for each sequence of candidate charging stations a route parameter of arrival at the destination from the origin sequentially through the candidate charging stations included in the sequence of candidate charging stations; and selecting an optimal route according to route parameters of the respective sequences of candidate charging stations and a predetermined route selection criterion.
    Type: Application
    Filed: April 25, 2013
    Publication date: December 26, 2013
    Applicant: NEC (China) Co., Ltd.
    Inventors: Man Li, Weisong Hu, Xiaowei Liu
  • Publication number: 20130343481
    Abstract: A method for predicting precoding matrix (PM) in a MIMO System includes the steps of: obtaining a present PM based on a present transmission; fitting the present PM and previous PMs with a predefined model; and determining a forthcoming PM which is expected to be used in the next transmission based on the fitting.
    Type: Application
    Filed: February 28, 2011
    Publication date: December 26, 2013
    Applicant: NEC (China) Co., Ltd.
    Inventors: Yu Zhang, Dalin Zhu, Zhennian Sun, Ming Lei
  • Patent number: 8606727
    Abstract: A system and method for traffic prediction based on space-time relation are disclosed. The system comprises a section spatial influence determining section for determining, for each of a plurality of sections to be predicted, spatial influences on the section by its neighboring sections; a traffic prediction model establishment section for establishing, for each of the plurality of sections to be predicted, a traffic prediction model by using the determined spatial influences and historical traffic data of the plurality of sections; and a traffic prediction section for predicting traffic of each of the plurality of sections to be predicted for a future time period by using real-time traffic data and the traffic prediction model. An apparatus and method for determining spatial influences among sections, as well as an apparatus and method for traffic prediction, are also disclosed.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: December 10, 2013
    Assignee: NEC (China) Co., Ltd.
    Inventors: Tao Wu, Shaoya Wang, Junjian He, Weisong Hu, Jia Rao, Xiaowei Liu
  • Publication number: 20130322396
    Abstract: Embodiments of the disclosure provide a method an apparatus for coordinating interference on a user equipment, the user equipment being served by a serving base station and interfered by an interfering base station. The method comprising steps of requesting for a limited access to the interfering base station; and responsive to an acknowledge message from the interfering base station, transmitting interference coordination information to the interfering base station.
    Type: Application
    Filed: September 19, 2011
    Publication date: December 5, 2013
    Applicant: NEC (CHINA) CO., LTD.
    Inventors: Lei Jiang, Ming Lei, Weidong Wang, Chaowei Wang
  • Publication number: 20130272438
    Abstract: Embodiments of the invention provide a method for beamforming based on Grassmannian predictive coding (GPC) in a MIMO system. The method may comprise steps of: estimating present channel direction information (CDI) according to a received signal; predicting future CDI based on the present CDI and at least one of previous CDIs; predicting future codebook based on present codebook and at least one of previous codebooks; selecting a codeword from the future codebook based on the future CSI; and feeding back an index of the selected codeword to the transmitter.
    Type: Application
    Filed: March 16, 2011
    Publication date: October 17, 2013
    Applicant: NEC (CHINA) CO., LTD.
    Inventors: Dalin Zhu, Yu Zhang, Gang Wang, Ming Lei
  • Publication number: 20130265960
    Abstract: The present invention discloses a method and an apparatus for modifying a channel quality indication (CQI). This method may comprise: calculating a scaling factor for the channel quality indication based on uplink channel information and an antenna virtualization pre-coding scheme; and modifying the channel quality indication reported by user equipment by using the scaling factor. According to the technical solutions of the present invention, the antenna virtualization factor is considered in performing CQI modification and. Thus, this solution can overcome the problem of CQI mismatch, enhance the completeness and accuracy of CQI feedback, and improve the cell throughput performance and frequency utilization.
    Type: Application
    Filed: February 28, 2011
    Publication date: October 10, 2013
    Applicant: NEC (CHINA) CO., LTD.
    Inventors: Gang Wang, Yu Zhang, Zhennian Sun, Ming Lei
  • Publication number: 20130259024
    Abstract: The present invention discloses a method and an apparatus for primary synchronization signal (PSS) detection. The method may comprise: performing a central-symmetrical preprocess on a receive vector by exploiting a central symmetry of the primary synchronization signal; and performing, based on the central-symmetrical preprocess, a non-coherent detection on the receive vector using local primary synchronization signals so as to detect the primary synchronization signal. The computation complexity in PSS detection may be significantly reduced by performing preprocess to the receive vector based on the central symmetry of the primary synchronization signal, thereby considerably enhancing the speed and performance of PSS search and further improving the cell search efficiency.
    Type: Application
    Filed: March 14, 2011
    Publication date: October 3, 2013
    Applicant: NEC (CHINA) CO., LTD.
    Inventors: Zhongshan Zhang, Ming Lei
  • Patent number: 8548490
    Abstract: The present invention provides a multi-objects positioning system and power-control based multiple access control method. The multi-objects positioning system according to the present invention comprises a plurality of tag devices carried by multiple objects and one or more positioning devices for determining the positions of the objects, wherein each of the tag devices includes a positioning device list for recording status information of the positioning devices.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: October 1, 2013
    Assignee: NEC (China) Co., Ltd.
    Inventors: Yongcai Wang, Junhui Zhao
  • Publication number: 20130251252
    Abstract: A method and device for extracting color features, relating to the field of image processing includes converting an original image into sub-images corresponding to channels in a color space, dividing the sub-images into a plurality of cells with identical size, and calculating the color histograms of each of the plurality of cells. A cell and neighboring cells thereof are defined as the effective scope of the cell, and a feature vector of the cell is determined according to a degree of similarity of the color histograms of every two neighboring cells in the effective scope. The feature vectors of the cells in the sub-images are concatenated to obtain feature vectors of the sub-images, and a feature vector of the original image is obtained according to the feature vectors of the sub-images.
    Type: Application
    Filed: January 16, 2013
    Publication date: September 26, 2013
    Applicant: NEC (China) Co., Ltd.
    Inventors: Feng Wang, Shaopeng Tang, Hongming Zhang, Wei Zeng, Guoyi Liu, Qingyuan Wang, Lei Qin, Qingming Huang
  • Publication number: 20130254212
    Abstract: A data indexing system is provided. The system includes: a time interval splitting unit configured to split a predetermined time range into a plurality of time intervals. A first index creating unit is configured to create a first-level index for data in a current time interval, the first-level index including a time interval index and a subspace index. A second index creating unit is configured to create, in a time interval after the current time interval, a second-level index for data in the current time interval. The second-level index has a finer granularity than the first-level index. A data indexing method and a data querying method are also provided. The cost for index maintenance can be greatly reduced in a case of frequent updates. Further, invalid scans during the query process can be reduced and the query performance can be improved.
    Type: Application
    Filed: December 12, 2012
    Publication date: September 26, 2013
    Applicant: NEC (China) Co., Ltd.
    Inventors: Jia RAO, Weisong HU
  • Publication number: 20130251197
    Abstract: A method and a device for objects counting in image processing includes acquiring the depth image of any one frame; detecting objects according to the depth image; associating the identical object in different frames to form a trajectory; and determining the number of objects according to the number of trajectories. The devices include an acquisition module for acquiring the depth image of any one frame; a detection module for detecting objects according to the depth image; an association module for associating the identical object in different frames to form a trajectory; a determining module for determining the number of objects according to the number of trajectories. The objects are detected according to the depth image. The identical object in different frames is associated to form a trajectory and the number of objects is determined according to the number of trajectories.
    Type: Application
    Filed: January 16, 2013
    Publication date: September 26, 2013
    Applicant: NEC (China) Co., Ltd.
    Inventors: Guoyi Liu, Shaopeng Tang, Hongming Zhang, Feng Wang, Wei Zeng
  • Publication number: 20130251246
    Abstract: A method and a device for training a pose classifier and an object classifier, and a method and a device for objection detection, relating to the field of image processing are provided. The object detection method includes acquiring input image samples; performing pose estimation processing on said input image sample according to said pose classifier; and performing object detection on the processed input image sample according to said pose classifier to acquire the location information of the object, wherein said object is an object with joints. Objects in different poses can be detected and therefore the object hit rate is increased.
    Type: Application
    Filed: January 16, 2013
    Publication date: September 26, 2013
    Applicant: NEC (China) Co., Ltd.
    Inventors: Shaopeng Tang, Feng Wang, Guoyi Liu, Hongming Zhang, Wei Zeng
  • Publication number: 20130242920
    Abstract: Embodiments of the invention provide a method for enhancing downlink HARQ. The method may comprise steps of: responsive to that a packet is unsuccessfully received, estimating a required channel quality for next retransmission of the packet; selecting a target subset of base stations from a cooperation set of base stations based on the required channel quality; and sending an indication of the target subset of base stations to a central unit.
    Type: Application
    Filed: August 1, 2011
    Publication date: September 19, 2013
    Applicant: NEC (CHINA) CO., LTD.
    Inventors: Gang Wang, Ming Lei
  • Publication number: 20130243343
    Abstract: A method and a device for people group detection, relating to the field of image processing includes acquiring at least one corner and foreground region in video data; computing, according to said corner and foreground region, to obtain at least one cluster; constructing at least one region of people group according to said cluster. The device includes an acquisition module, a clustering module, and a construction module. Automatic people group detection is realized that is independent of the location detection of people and can be applied to any scene including complicated ones, and thus user demands can be better satisfied.
    Type: Application
    Filed: January 16, 2013
    Publication date: September 19, 2013
    Applicant: NEC (China) Co., Ltd.
    Inventors: Hongming Zhang, Guoyi Liu, Shaopeng Tang, Feng Wang, Wei Zeng
  • Publication number: 20130235835
    Abstract: The present invention discloses a method and apparatus of performing outer loop link adaptation (OLLA) operation. This method may comprise: accelerating in an initial probing phase, increase of an OLLA scaling factor until obtaining a negative result regarding codeword selection; and fine modifying, in a fine modification phase, the scaling factor using an upturn factor and a downturn factor in response to the result regarding codeword selection so that a channel quality indication, which is modified using the scaling factor, is matched with its actual value. Compared with the prior art, the technical solution as provided in the present invention can quickly modify a CQI to match its actual value, thus this solution may effectively mitigate the CQI mismatch, improve the CQI feedback accuracy, and further enhance the cell throughput performance and frequency utilization.
    Type: Application
    Filed: February 28, 2011
    Publication date: September 12, 2013
    Applicant: NEC (CHINA) CO., LTD.
    Inventors: Gang Wang, Ming Lei
  • Publication number: 20130238155
    Abstract: Embodiments of the invention disclose a method and apparatus for detecting the statuses of energy source consumption devices, relate to the field of energy source auditing and are intended to improve the efficiency and accuracy of detecting the statuses of the energy source consumption devices.
    Type: Application
    Filed: December 14, 2012
    Publication date: September 12, 2013
    Applicant: NEC (CHINA) CO., LTD.
    Inventors: LEI SONG, CHANGJIAN HU, LU YU, KAI ZHAO
  • Publication number: 20130230048
    Abstract: A server interconnection system includes three switches each having n downlink ports and an uplink port, wherein n is an integer equal to or larger than 2; and m servers each having at least two network interface cards respectively connected to downlink ports of different switches, wherein m=3p/2, p is an even number equal to or larger than 2 but equal to or less than n, wherein every three servers form a group. A first server connects to a downlink port of a first switch and a downlink port of a second switch via two network interface cards. A second server connects to a downlink port of the first switch and a downlink port of a third switch via two network interface cards. A third server connects to a downlink port of the second switch and a downlink port of the third switch via two network interface cards.
    Type: Application
    Filed: December 12, 2012
    Publication date: September 5, 2013
    Applicant: NEC (China) Co., Ltd.
    Inventors: YONGQIANG LIU, Yan Hu, Zhangfeng Hu
  • Patent number: 8527487
    Abstract: The present invention provides a method and system for automatic construction of information organization structure for related information browsing. The method comprises: inputting a target entity; retrieving information objects related to the target entity from an information object set; extracting topics related to the target entity; searching an existing structure resource to identify existing structures and entities which are relevant to the target entity based on the extracted topics; and selecting a matched structure, which is used for organizing the retrieved information objects related to the target entity, from the identified existing structures by comparing the target entity with each of the identified entities. Compared with the prior arts, the present invention can largely improve the readability of the relevant generated information organization structure.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: September 3, 2013
    Assignee: NEC (China) Co., Ltd.
    Inventors: Changjian Hu, Kai Zhao, Min Zhao, Likun Qiu