Patents Assigned to NEC (China) Co., Ltd.
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Publication number: 20140028442Abstract: 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: ApplicationFiled: April 25, 2013Publication date: January 30, 2014Applicant: NEC (China) Co., Ltd.Inventors: Lu Yu, Lei Song, Changjian Hu, Kai Zhao
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Publication number: 20130344913Abstract: 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: ApplicationFiled: September 16, 2011Publication date: December 26, 2013Applicant: NEC (CHINA) CO., LTD.Inventors: Chaofeng Li, Lei Jiang, Ming Lei
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Publication number: 20130345976Abstract: 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: ApplicationFiled: April 25, 2013Publication date: December 26, 2013Applicant: NEC (China) Co., Ltd.Inventors: Man Li, Weisong Hu, Xiaowei Liu
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Publication number: 20130343481Abstract: 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: ApplicationFiled: February 28, 2011Publication date: December 26, 2013Applicant: NEC (China) Co., Ltd.Inventors: Yu Zhang, Dalin Zhu, Zhennian Sun, Ming Lei
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Patent number: 8606727Abstract: 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: GrantFiled: November 9, 2010Date of Patent: December 10, 2013Assignee: NEC (China) Co., Ltd.Inventors: Tao Wu, Shaoya Wang, Junjian He, Weisong Hu, Jia Rao, Xiaowei Liu
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Publication number: 20130322396Abstract: 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: ApplicationFiled: September 19, 2011Publication date: December 5, 2013Applicant: NEC (CHINA) CO., LTD.Inventors: Lei Jiang, Ming Lei, Weidong Wang, Chaowei Wang
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Publication number: 20130272438Abstract: 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: ApplicationFiled: March 16, 2011Publication date: October 17, 2013Applicant: NEC (CHINA) CO., LTD.Inventors: Dalin Zhu, Yu Zhang, Gang Wang, Ming Lei
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Publication number: 20130265960Abstract: 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: ApplicationFiled: February 28, 2011Publication date: October 10, 2013Applicant: NEC (CHINA) CO., LTD.Inventors: Gang Wang, Yu Zhang, Zhennian Sun, Ming Lei
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Publication number: 20130259024Abstract: 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: ApplicationFiled: March 14, 2011Publication date: October 3, 2013Applicant: NEC (CHINA) CO., LTD.Inventors: Zhongshan Zhang, Ming Lei
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Patent number: 8548490Abstract: 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: GrantFiled: October 28, 2009Date of Patent: October 1, 2013Assignee: NEC (China) Co., Ltd.Inventors: Yongcai Wang, Junhui Zhao
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Publication number: 20130251252Abstract: 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: ApplicationFiled: January 16, 2013Publication date: September 26, 2013Applicant: NEC (China) Co., Ltd.Inventors: Feng Wang, Shaopeng Tang, Hongming Zhang, Wei Zeng, Guoyi Liu, Qingyuan Wang, Lei Qin, Qingming Huang
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Publication number: 20130254212Abstract: 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: ApplicationFiled: December 12, 2012Publication date: September 26, 2013Applicant: NEC (China) Co., Ltd.Inventors: Jia RAO, Weisong HU
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Publication number: 20130251197Abstract: 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: ApplicationFiled: January 16, 2013Publication date: September 26, 2013Applicant: NEC (China) Co., Ltd.Inventors: Guoyi Liu, Shaopeng Tang, Hongming Zhang, Feng Wang, Wei Zeng
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Publication number: 20130251246Abstract: 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: ApplicationFiled: January 16, 2013Publication date: September 26, 2013Applicant: NEC (China) Co., Ltd.Inventors: Shaopeng Tang, Feng Wang, Guoyi Liu, Hongming Zhang, Wei Zeng
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Publication number: 20130242920Abstract: 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: ApplicationFiled: August 1, 2011Publication date: September 19, 2013Applicant: NEC (CHINA) CO., LTD.Inventors: Gang Wang, Ming Lei
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Publication number: 20130243343Abstract: 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: ApplicationFiled: January 16, 2013Publication date: September 19, 2013Applicant: NEC (China) Co., Ltd.Inventors: Hongming Zhang, Guoyi Liu, Shaopeng Tang, Feng Wang, Wei Zeng
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Publication number: 20130235835Abstract: 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: ApplicationFiled: February 28, 2011Publication date: September 12, 2013Applicant: NEC (CHINA) CO., LTD.Inventors: Gang Wang, Ming Lei
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Publication number: 20130238155Abstract: 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: ApplicationFiled: December 14, 2012Publication date: September 12, 2013Applicant: NEC (CHINA) CO., LTD.Inventors: LEI SONG, CHANGJIAN HU, LU YU, KAI ZHAO
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Publication number: 20130230048Abstract: 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: ApplicationFiled: December 12, 2012Publication date: September 5, 2013Applicant: NEC (China) Co., Ltd.Inventors: YONGQIANG LIU, Yan Hu, Zhangfeng Hu
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Patent number: 8527487Abstract: 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: GrantFiled: November 16, 2009Date of Patent: September 3, 2013Assignee: NEC (China) Co., Ltd.Inventors: Changjian Hu, Kai Zhao, Min Zhao, Likun Qiu