Patents Assigned to NEC (China) Co., Ltd.
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Publication number: 20150036561Abstract: Embodiments of the disclosure provide a method and apparatus for enhancing coverage in a TDD system, wherein there is at least one TDD UL/DL configuration for subframes in the TDD system, and the at least one UL/DL configuration comprises at least one special subframe and at least one normal subframe. In the method according to embodiments of the present invention, whether a special subframe is to be applied in TTI bundling is determined first, and then a message with an indication indicating that a special subframe is to be applied in TTI bundling is sent to a UE in response to determining that a special subframe is to be applied in TTI bundling, such that the UE transmits TTI bundling packets on at least one special subframe.Type: ApplicationFiled: September 25, 2012Publication date: February 5, 2015Applicant: NEC (CHINA) CO., LTD.Inventors: Gang Wang, Zhennian Sun, Ming Lei
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Publication number: 20150009895Abstract: Embodiments of the disclosure provide methods and apparatuses for cancelling cross-subframe co-channel interference (CCI). The method comprising receiving a channel quality indicators (CQI) of a cross-subframe from user equipment (UE), wherein the cross-subframe is a downlink subframe that is interfered by an uplink subframe in a neighboring cell; determining if the UE should be scheduled during cross-subframes based on at least the CQI; scheduling the UE during the cross-subframes if the UE is determined to be scheduled. By means of measuring and reporting CQIs on cross-subframe at UEs, base stations may determine more accurately if interferences at the cross-subframes are severe enough and if resources should be scheduled at the cross-subframe.Type: ApplicationFiled: March 27, 2012Publication date: January 8, 2015Applicant: NEC (CHINA) CO., LTD.Inventors: Dalin Zhu, Zhennian Sun, Yu Zhang, Gang Wang, Ming Lei
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Publication number: 20150003268Abstract: Embodiments of the disclosure provide a method and apparatus for scheduling a UE, wherein a BS serves the UE and employs a non-normal subframe to coordinate inter-cell interference, and wherein transmission power in the non-normal subframe is lower than that in a normal subframe. In the method according to embodiments of the present invention, channel quality information for the non-normal subframe may be adjusted based on information on transmission power of downlink packets and reference signals; and a target MCS may be determined according to the adjusted channel quality information, so that the BS schedules the UE based on the target MCS in the non-normal subframe.Type: ApplicationFiled: March 23, 2012Publication date: January 1, 2015Applicant: NEC (CHINA) CO., LTD.Inventors: Gang Wang, Lei Jiang, Ming Lei
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Publication number: 20140378150Abstract: Embodiments of the disclosure provide methods and apparatuses for performing D2D communication in a communication system. The communication system at least comprises a BS and a UE in cellular communication with the BS, and wherein the D2D communication is performed between a D2D transmitter and a D2D receiver and interferes with the cellular communication. A method according to the disclosure may comprise steps of: obtaining MCS information on the cellular communication between the BS and the UE; and determining a transmitting power for the D2D communication based on the MCS information, so as to reduce the interference from the D2D communication to the cellular communication.Type: ApplicationFiled: March 16, 2012Publication date: December 25, 2014Applicant: NEC (CHINA) CO., LTD.Inventors: Chaofeng Li, Ming Lei
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Publication number: 20140376369Abstract: Embodiments of the disclosure provide a method and apparatus for dynamically adjusting UL-DL configuration. In the method according to embodiments of the present invention, downlink traffic load and uplink traffic load for transmission between a BS and a UE in a TDD system may be obtained, a UL-DL traffic load relation may be determined based on the downlink traffic load and the uplink traffic load and a UL-DL configuration may be selected based on the UL-DL traffic load relation.Type: ApplicationFiled: March 30, 2012Publication date: December 25, 2014Applicant: NEC (CHINA) CO., LTD.Inventors: Dalin Zhu, Zhennian Sun, Su Yi, Gang Wang, Ming Lei
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Publication number: 20140378154Abstract: Provided are methods and corresponding apparatuses for allocation of resource blocks. A method for allocation of resource blocks comprises receiving, from a base station, information regarding a measurement location at which at least one identified resource block has been measured; and using, based upon a current location of a mobile relay node and the measurement location, the at least one identified resource block for communication between the mobile relay node and at least one user equipment connected therewith, wherein the at least one identified resource block is not used for communication between the base station and at least one user equipment connected therewith at the measurement location and a measurement of the at least one identified resource block is below a predetermined threshold. With the claimed inventions, interference in the high speed railway communication could be ameliorated and the spectrum efficiency would be improved.Type: ApplicationFiled: March 29, 2012Publication date: December 25, 2014Applicant: NEC (CHINA) CO., LTD.Inventors: Su Yi, Ming Lei, Shaoyi Xu
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Publication number: 20140369281Abstract: Embodiments of the disclosure provide methods and apparatuses for cancelling cross-subframe co-channel interference (CCI), the method comprising receiving a channel quality indicator (CQI) of a cross-subframe from a user equipment (UE), the cross-subframe is a downlink subframe that is interfered by an uplink subframe in a neighboring cell; determining if the UE should be scheduled during cross-subframes by comparing the CQI with an adaptive threshold; and scheduling the UE during the cross-subframes if the UE is determined to be scheduled. By means of determining the resources scheduling based on an adaptive threshold, CCI may be cancelled and the overall resource usage will be increased according to the present invention. Furthermore, the adaptive threshold scheme can be easily implemented in practice.Type: ApplicationFiled: March 27, 2012Publication date: December 18, 2014Applicant: NEC (CHINA) CO., LTD.Inventors: Dalin Zhu, Zhennian Sun, Yu Zhang, Gang Wang, Ming Lei
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Publication number: 20140369219Abstract: The present invention provides a method and apparatus for estimating channel quality information, a base station and a network central processing device. According to the embodiments of the present invention, a macro cell includes multiple transmission points, the method can comprise receiving the channel quality information which is measured by a user equipment based on a cell specific reference signal; obtaining channel matrix information the multiple transmission points; calculating beamforming information on a single cell transmission and a coordinated multi-point transmission based on the channel matrix information; and estimating the channel quality information for the single cell transmission and the coordinated multi-point transmission based on the channel quality information, the channel matrix information, and the beamforming information.Type: ApplicationFiled: February 24, 2012Publication date: December 18, 2014Applicant: NEC (CHINA) CO., LTD.Inventors: Gang Wang, Ming Lei
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Publication number: 20140369283Abstract: The present invention relates to a method for link adaptation in a wireless communication system. The method comprises: determining whether a UE operates in a SU-MIMO transmission mode or in a MU-MIMO transmission mode; applying, in responsive to determination that the UE operates in the SU-MIMO transmission mode, a SU-MIMO OLLA offset to a signal to interference and noise ratio adjusted with inner loop link adaptation; applying, in responsive to determination that the UE operates in the MU-MIMO transmission mode, a MU-MIMO OLLA offset to a signal to interference and noise ratio adjusted with inner loop link adaptation, wherein the MU-MIMO OLLA offset is based on the SU-MIMO OLLA offset and an extra offset which is indicative of inter-user interference, wherein the SU-MIMO OLLA offset and the extra offset are updated in responsive to receipt of an ACK/NACK message for a packet reported from the UE.Type: ApplicationFiled: March 27, 2012Publication date: December 18, 2014Applicant: NEC (CHINA) CO., LTD.Inventors: Qingwei Ge, Gang Wang, Zhennian Sun, Ming Lei
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Patent number: 8891556Abstract: An apparatus and method for generating a signal for transmission in a single-carrier communication system are disclosed. The apparatus comprises a reference signal inserter, which multiplexes data symbols with reference signal symbols in time domain to form a plurality of symbol blocks as the signal for transmission, wherein the plurality of symbol blocks include symbol blocks of a first type and symbol blocks of a second type, wherein each of the symbol blocks of the first type includes only data symbols, and wherein each of the symbol blocks of the second type includes both data symbols and reference signal symbols.Type: GrantFiled: August 4, 2010Date of Patent: November 18, 2014Assignee: NEC (China) Co., Ltd.Inventors: Ye Wu, Ming Lei
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Publication number: 20140328218Abstract: The present invention provides a method and apparatus for allocating feedback transmission resource and a method and apparatus for providing information on values thereof. According to the method of allocating feedback transmission resource, the feedback transmission resource is divided into a plurality of resource units, and the method can comprise receiving information on values of the plurality of resource units for the mobile stations; determining values of possible resource allocation status in each bidding round for the mobile stations from the received information on the values based on the sequential second price auction; and deriving an auction process of the resource units from the determined values of possible resource allocation status in each bidding round based on the sequential second price auction, so as to obtain a final resource unit allocation result for the mobile stations.Type: ApplicationFiled: November 8, 2011Publication date: November 6, 2014Applicant: NEC (CHINA) CO., LTD.Inventors: Dalin Zhu, Ming Lei, Lingyang Song, Zhongshan Zhang, Tianyu Wang
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Patent number: 8879655Abstract: The present invention provides a method for obtaining channel state information required for beamforming, comprising: estimating current channel state information according to a received signal; predicting future channel state information which is expected to be used by a transmitter in the next beamforming based on the current channel state information and historical channel state information; reading previous channel state information used by the transmitter in the current beamforming; determining feedback information based on the future channel state information and the previous channel state information; and sending the feedback information to the transmitter.Type: GrantFiled: August 24, 2011Date of Patent: November 4, 2014Assignee: NEC (China) Co., Ltd.Inventors: Yu Zhang, Ye Wu, Ming Lei
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Publication number: 20140297653Abstract: An ontology-based query method and apparatus include acquiring a to-be-queried triple input by the user, where a known element is a query condition. One or more unknown elements in the to-be-queried triple is a query object and searching is performed, in the key-value pairs stored in each of the plurality of computing nodes, for a key-value pair matching the query condition. An element corresponding to the query object is determined from three elements included in a key value of the matched key-value pair, to acquire elements corresponding to the query objects determined in each of the plurality of computing nodes. A query result is acquired according to the elements corresponding to the query objects determined in each of the plurality of computing nodes.Type: ApplicationFiled: March 11, 2014Publication date: October 2, 2014Applicant: NEC (China) Co., Ltd.Inventors: Bo Liu, Jianqiang Li, Chunchen Liu
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Publication number: 20140297606Abstract: Disclosed is a method and device for processing a time sequence based on dimensionality reduction, belonging to the technical field of computers. The method includes: acquiring at least one to-be-processed time sequence; processing the at least one time sequence based on Piecewise Linear Approximation (PLA) where a time length of a time segment processed by PLA is unfixed and is an integral multiple of a preset unit time length. According to the present disclosure, a space for storing a time sequence may be reduced.Type: ApplicationFiled: March 11, 2014Publication date: October 2, 2014Applicant: NEC (China) Co., Ltd.Inventors: Jianqiang LI, Chunchen LIU, Bo LIU
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Publication number: 20140192704Abstract: The present invention provides a method and apparatus for indicating downlink channel measurement and a method and apparatus for performing channel measurement. The method for indicating downlink channel measurement comprises: receiving information on interferes of a user equipment; generating, based on downlink subframe configuration information, a downlink channel measurement indication for each of possible combinations of the interferers, wherein the channel measurement indication is adapted to indicate a subframe group to be measured by a user equipment; and sending the downlink channel measurement indication to the user equipment so as to indicate the user equipment to perform corresponding downlink channel measurement. According to embodiments of the present invention, the subframe groups that are required to be measured by the user equipment may be determined with respect to possible combinations of interferers corresponding to different levels of interference.Type: ApplicationFiled: August 5, 2011Publication date: July 10, 2014Applicant: NEC (CHINA) CO., LTD.Inventors: Su Yi, Yu Zhang, Zhennian Sun, Ming Lei
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Publication number: 20140188382Abstract: A vehicle route planning method and apparatus include: acquiring a current location, a destination location, and an amount of remaining energy of a vehicle; if energy needs to be supplemented for the vehicle to travel from the current location to the destination location, determining backup energy stations for supplementing energy; acquiring a node cost when the vehicle reaches each of the backup energy stations, and determining, according to an energy efficiency of the vehicle, an energy consumption of the vehicle when traveling on each of paths from the current location to the destination location. A travel route is planned for the vehicle according to the energy consumption of the vehicle when traveling on each of the paths, and the node cost when the vehicle reaches each of the backup energy stations.Type: ApplicationFiled: July 25, 2013Publication date: July 3, 2014Applicant: NEC (China) Co., Ltd.Inventors: ZHENG PAN, MAN LI, WEISONG HU, XIAOWEI LIU
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Patent number: 8700295Abstract: A road network is described using roads, intersections and sections as traffic information elements and a correspondence between these elements and a road topological network in a digital map is established, so that a universal traffic information describing model, which is compatible with language used in people's daily life, can be established. The traffic information element knowledge base is generated based on roads, intersections and sections, respective attributes and the relationship between them, to support inter-conversion between road topological network traffic information and text-based traffic information.Type: GrantFiled: November 9, 2010Date of Patent: April 15, 2014Assignee: NEC (China) Co., Ltd.Inventors: Tao Wu, Weisong Hu, Xiaowei Liu, Weili Zhang, Chenghai Li
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Patent number: 8694275Abstract: Embodiments of the present invention provide not only a technical solution for calibrating a positioning device but also a technical solution for characterizing an area of interest in a space. Specifically, there is provided a system, which may include: a tag capable of emitting ranging signals, placed at location points which are selected as space feature points in the space; a positioning device in the space, configured to obtain relative coordinates of the space feature points in relation to the positioning device based on the ranging signals from the tag; and a server, configured to determine location parameters of the positioning device in the space based on the relative coordinates, so as to calibrate the positioning device. The positioning device can be calibrated automatically, fast and accurately using the system.Type: GrantFiled: July 25, 2012Date of Patent: April 8, 2014Assignee: NEC (China) Co., Ltd.Inventors: Yongcai Wang, Junhui Zhao, Toshikazu Fukushima
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Publication number: 20140092244Abstract: An object search method, a search verification method, and apparatuses thereof, pertain to the field of video surveillance technologies. The object search method includes: acquiring an object image for search and a designated region of the object image for search, and calculating local feature points in the designated region of the object image for search; searching in a pre-constructed index set for indexes matching the local feature points in the designated region; and acquiring object images corresponding to the detected indexes, and using the acquired object images as detected object images in a video. In this way, object search is implemented by using local regions of an image, the application range of the object search is extended, and accuracy of the search result is improved.Type: ApplicationFiled: July 30, 2013Publication date: April 3, 2014Applicant: NEC (China) Co., Ltd.Inventors: Shaopeng Tang, Dawei Liang, Wei Zeng
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Patent number: 8649991Abstract: Embodiments of the present invention provide not only a technical solution for calibrating a positioning device but also a technical solution for characterizing an area of interest in a space. Specifically, there is provided a system, which may include: a tag capable of emitting ranging signals, placed at location points which are selected as space feature points in the space; a positioning device in the space, configured to obtain relative coordinates of the space feature points in relation to the positioning device based on the ranging signals from the tag; and a server, configured to determine location parameters of the positioning device in the space based on the relative coordinates, so as to calibrate the positioning device. The positioning device can be calibrated automatically, fast and accurately using the system.Type: GrantFiled: July 25, 2012Date of Patent: February 11, 2014Assignee: NEC (China) Co., Ltd.Inventors: Yongcai Wang, Junhui Zhao, Toshikazu Fukushima