公开(公告)号：US20230403672A1

公开(公告)日：2023-12-14

申请号：US17994976

申请日：2022-11-28

Applicant: NEC Corporation

Inventor： Toshiki TAKEUCHI ,  Kazushi Muraoka

IPC: H04W64/00

CPC classification number: H04W64/00

Abstract: To provide a wireless control device, a wireless communication system, a wireless control method, and a wireless control program that are able to achieve stable communication quality.
The wireless control device includes: a movement prediction unit configured to predict a movement of a wireless terminal configured to perform wireless communication; a propagation change determination unit configured to determine a propagation change degree indicating a degree of an extent that propagation of the wireless communication including received power of the wireless communication changes within a predetermined assumed delay time; and a selection unit configured to select, from among a plurality of antennas and a plurality of beams, at least any of the antenna and the beam being used for wireless communication control with the wireless terminal, based on the propagation change degree being determined by the propagation change determination unit.

公开(公告)号：US20220206103A1

公开(公告)日：2022-06-30

申请号：US17606500

申请日：2020-04-30

Applicant: NEC Corporation

Inventor： Toshiki TAKEUCHI

IPC: G01S5/02

Abstract: A location estimation system includes: a first location estimating unit configured to estimate first location information related to a target object; a second location estimating unit configured to estimate second location information related to a target object; an association determining unit configured to determine association between the target object whose location is estimated from the first location information and the target object whose location is estimated from the second location information, based on the first location information and the second location information; a weight calculating unit configured to calculate correct location information of the target object and weighting information of the correct location information, based on accuracy information of the second location information and determination results of the association; and a parameter updating unit configured to update a parameter for estimating the first location information, based on the correct location information and the weighting information.

公开(公告)号：US20240386324A1

公开(公告)日：2024-11-21

申请号：US18659108

申请日：2024-05-09

Applicant: NEC Corporation ,  NEC Platforms, Ltd.

Inventor： Shoya TOKITA ,  Jun SAKAI ,  Toshiki TAKEUCHI ,  Ayaka HARAYAMA ,  Tsuyoshi HAMADA ,  Tomohiro SHIMODA

IPC: G06N20/00

Abstract: The learning model generator includes a data division unit which groups multiple feature data, each of which indicates a feature, and a learning model generation unit which generates a learning model using feature data belonging to a first group among multiple groups formed by the data division unit, or the feature data belonging to the first group and a part of feature data belonging to other groups, as training data.

公开(公告)号：US20240284291A1

公开(公告)日：2024-08-22

申请号：US18290477

申请日：2021-10-15

Applicant: NEC Corporation

Inventor： Kazushi MURAOKA ,  Toshiki TAKEUCHI ,  Yasushi MARUTA

IPC: H04W36/32 ,  H04W64/00

CPC classification number: H04W36/324 ,  H04W36/322 ,  H04W64/003

Abstract: In order to control radio communication with a terminal apparatus in accordance with a movement situation of the terminal apparatus, a radio control apparatus is configured to estimate a location of the terminal apparatus, estimate a type of the terminal apparatus, predict movement of the terminal apparatus based on the estimated location, predict a future location of the terminal apparatus, estimate, based on the estimated type, a reception level of a radio signal at the future location for each communication parameter, and determine the communication parameter to be used for the terminal apparatus at the future location, based on an estimation result of the reception level.

公开(公告)号：US20220141688A1

公开(公告)日：2022-05-05

申请号：US17512821

申请日：2021-10-28

Applicant: NEC Corporation

Inventor： Toshiki TAKEUCHI ,  Kohei OKADA

IPC: H04W24/08 ,  H04W40/24

Abstract: A radio frame analysis system includes: an analysis unit that analyzes a network configuration by performing clustering processing on a frame feature value; a distance calculation unit that calculates a distance between clusters obtained by the clustering processing; a reliability determination unit that determines reliability of a result of the clustering processing based on the distance between the clusters; an output unit that outputs a result of the analysis performed by the analysis unit; and an output timing change unit that changes a timing at which the output unit outputs the result of the analysis by changing the number of samples of the frame feature value required to output the result in accordance with the reliability.

公开(公告)号：US20210250894A1

公开(公告)日：2021-08-12

申请号：US16973614

申请日：2019-06-12

Applicant: NEC Corporation

Inventor： Taichi OHTSUJI ,  Toshiki TAKEUCHI ,  Masaki KITSUNEZUKA

IPC: H04W64/00 ,  G01S5/02 ,  G06F17/14

Abstract: A terminal number estimating system includes: a plurality of receivers that receive a wireless signal transmitted from a plurality of terminal devices by frequency-division multiple access; a Fourier transform unit that performs a discrete Fourier transform on each wireless signal received by the plurality of reception means and outputs a discrete Fourier coefficient; and a terminal number estimation unit that estimates a position of each terminal device by clustering a resource block of each wireless signal based on each discrete Fourier coefficient.

公开(公告)号：US20240397351A1

公开(公告)日：2024-11-28

申请号：US18665819

申请日：2024-05-16

Applicant: NEC Corporation

Inventor： Naoto ISHII ,  Toshiki TAKEUCHI ,  Daisaku OGASAHARA

IPC: H04W24/06 ,  H04B10/073 ,  H04Q11/00 ,  H04W88/08

Abstract: A wireless control unit transmits to a plurality of analog sections a control signal for performing control so as to cause the plurality of analog sections to transition to a loopback mode, transmits to the plurality of analog sections an observation signal for observing delay times, calculates, for each of the plurality of analog sections, a path delay based on the number of clocks generated from when the observation signal is transmitted to when the observation signal is received, and transmits to the plurality of analog sections a control signal for canceling the loopback mode of the plurality of analog sections. In addition, the wireless control unit transmits a downlink signal at a timing calculated for each of the plurality of analog sections according to the path delay.

公开(公告)号：US20230170970A1

公开(公告)日：2023-06-01

申请号：US17992365

申请日：2022-11-22

Applicant: NEC Corporation

Inventor： Jun SHIKIDA ,  Kazushi MURAOKA ,  Toshiki TAKEUCHI

IPC: H04B7/06 ,  H04B17/309

CPC classification number: H04B7/0695 ,  H04B17/309

Abstract: Provided is a control apparatus configured to acquire a measurement result including information on reception qualities of a plurality of beams, update a database including information representing a relationship between the plurality of beams for each of a plurality of propagation environments, based on the measurement result, and perform selection processing for selecting a beam using the database.

公开(公告)号：US20210227486A1

公开(公告)日：2021-07-22

申请号：US16972786

申请日：2019-05-10

Applicant: NEC Corporation

Inventor： Toshiki TAKEUCHI

IPC: H04W64/00

Abstract: An object quantity estimation system 100 includes: a terminal path estimation unit 20 configured to estimate the traveling paths of wireless terminals; an actual quantity-of-people counting unit 30 configured to count the actual quantity of people that are located in each of the fixed points; a terminal detection rate calculation unit 40 configured to calculate the terminal detection rate that indicates a relationship between the quantity of the wireless terminals and the actual quantity of people, for each of the fixed points; and an actual quantity-of-people estimation unit 50 configured to determine priorities of the traveling paths, each of which passes at least one of the fixed points, and sequentially estimate the actual quantity of people having traveled on each traveling path, in descending order of the priorities of the traveling paths, based on the terminal detection rates.

公开(公告)号：US20180284217A1

公开(公告)日：2018-10-04

申请号：US15765859

申请日：2016-10-04

Applicant: NEC CORPORATION

Inventor： Toshiki TAKEUCHI

IPC: G01S3/782 ,  H04B7/10 ,  H04W16/28 ,  H04W72/04 ,  H01Q1/22

Abstract: An antenna directivity control parameter generating apparatus includes a memory that stores image processing data generated by image processing and a processor that calculates an antenna directivity control parameter for a base station based on the image processing data.