公开(公告)号：US20250081224A1

公开(公告)日：2025-03-06

申请号：US18574798

申请日：2021-12-10

Applicant: NEC Corporation

Inventor： Toshiki TAKEUCHI ,  Kazushi MURAOKA ,  Yasushi MARUTA

IPC: H04W72/541 ,  H04W24/02

Abstract: A wireless base station includes an interference-sensing means for sensing the occurrence of interference at the wireless base station, an interference analysis means for executing analysis that is based on the result of sensing by the interference-sensing means and that includes estimation as to the continuity of the interference, and a wireless resource control means for executing wireless resource control for reducing the effect of the interference in accordance with the result of analysis by the interference analysis means. The continuity includes temporal continuity and/or spatial continuity.

公开(公告)号：US20240146437A1

公开(公告)日：2024-05-02

申请号：US18570182

申请日：2022-01-24

Applicant: NEC Corporation

Inventor： Mingqi WU ,  Kazushi MURAOKA

IPC: H04J14/02 ,  H04B10/079 ,  H04B10/2581

CPC classification number: H04J14/0221 ,  H04B10/07953 ,  H04B10/2581

Abstract: A penalty is introduced to the channel with less noise when the difference in the transmitted signal quality among channels is reduced; therefore, an equalization apparatus according to an exemplary aspect of the disclosure includes a processing means for performing a process associated with a signal using a transfer function with a coefficient, the signal propagating through each of a plurality of channels; and a coefficient generating means for generating the coefficient based on channel quality information on each of the plurality of channels.

公开(公告)号：US20230419798A1

公开(公告)日：2023-12-28

申请号：US18243884

申请日：2023-09-08

Applicant: NEC Corporation

Inventor： Taichi OHTSUJI ,  Kazushi MURAOKA ,  Hiroaki AMINAKA ,  Dai KANETOMO ,  Norio YAMAGAKI ,  Takashi YOSHINAGA

IPC: G08B13/196 ,  G08B25/00 ,  G06V20/52 ,  G06T7/292

CPC classification number: G08B13/19608 ,  G08B13/19613 ,  G08B13/19645 ,  G08B25/009 ,  G06V20/52 ,  G06T7/292 ,  G06T2207/30232

Abstract: A tracking support system includes a position calculating section connected with a plurality of cameras arranged in a predetermined monitoring area to transmit video images imaged by the plurality of cameras and configured to calculate a position of the tracking target based on the video images received from the plurality of cameras; a tracker selecting section configured to select a tracker to be instructed to track the tracking target, based on position information of the terminal received from the terminal and the calculated position of the tracking target; and an information transmitting section configured to transmit information of a distance between the tracking target and the terminal during the tracking of the tracking target to the terminal carried by the selected tracker.

公开(公告)号：US20230344478A1

公开(公告)日：2023-10-26

申请号：US18132633

申请日：2023-04-10

Applicant: NEC Corporation

Inventor： Toshiki TAKEUCHI ,  Kazushi MURAOKA

IPC: H04B7/06 ,  H04L41/16

CPC classification number: H04B7/0608 ,  H04B7/0695 ,  H04L41/16

Abstract: A control device configured to predict prediction information based on in-operation time-series data with use of a learning device, the learning device being trained, during training, (i) with time-series data, using as training data, in which pieces of radio quality information of respective antennas that are disposed in a distributed manner and that perform wireless communications with a terminal device are arranged in time series, and (ii) with assignment information, using as training data, that includes information about the antenna assigned, from the training data, to the wireless communications after a predetermined length of time, wherein the in-operation time-series data being the time-series data acquired during operation, and the prediction information including information about the antenna to be assigned, from the in-operation time-series data, to the wireless communications after the predetermined length of time.

公开(公告)号：US20210320750A1

公开(公告)日：2021-10-14

申请号：US17230323

申请日：2021-04-14

Applicant: NEC CORPORATION ,  OSAKA UNIVERSITY ,  THE DOSHISHA

Inventor： Kazushi MURAOKA ,  Naoto ISHII ,  Takumi TAKAHASHI ,  Seiichi SAMPEI ,  Shinsuke IBI

IPC: H04L1/00 ,  H03M13/11

Abstract: A BP detector of a wireless receiver apparatus reads a first parameter set or a second parameter set. The first parameter set includes a plurality of scaling factors and a plurality of damping factors learned together using a deep learning technique. The second parameter set includes a plurality of scaling factors and a plurality of node selection factors learned together using a deep learning technique from a memory. The BP detector executes an iterative BP algorithm that uses the first parameter set or the second parameter set in order to perform multi-user detection.

公开(公告)号：US20210105584A1

公开(公告)日：2021-04-08

申请号：US16606307

申请日：2018-01-18

Applicant: NEC Corporation

Inventor： Taichi OHTSUJI ,  Kazushi MURAOKA

IPC: H04W4/06 ,  H04W4/70 ,  H04W24/10 ,  H04W88/04

Abstract: Radio terminals (1A, 1B, 1C) each receive a broadcast/multicast signal (220) from a cellular communication network (10). The representative terminal (1A) receives response messages from the respective neighboring radio terminals (1B, 1C) via D2D communication (231, 232). Each response message is generated based on reception of the broadcast/multicast signal (220) by each neighboring radio terminal (1B, 1C). The representative terminal (1A) generates a representative response message and transmits it to the cellular communication network (10) or another node (7) via uplink transmission (240). It is thus, for example, possible to contribute to improving efficiency of transmission by radio terminals of response messages related to a broadcast/multicast service.

公开(公告)号：US20200266863A1

公开(公告)日：2020-08-20

申请号：US16761523

申请日：2018-11-08

Applicant: NEC Corporation

Inventor： Kazushi MURAOKA

IPC: H04B7/06 ,  H04L5/00 ,  H04B7/0456 ,  H04B7/0452 ,  H04L25/02 ,  H04L27/26 ,  H04W28/04 ,  H04B17/309

Abstract: A wireless apparatus multiplies, by a first weight corresponding to each of a plurality of beams, a received signal corresponding to a reference signal transmitted from each of wireless terminals, estimates a channel response associated with each of the beams, computes a predetermined metric for each combination of beams to be used, selects the beams to be used when performing signal detection with respect to a received signal into which radio signals transmitted from the wireless terminals are spatially multiplexed based on the predetermined metric, determines a second weight to be used for the signal detection and multiplies, by the second weight, the received signal into which radio signals transmitted from the wireless terminals are spatially multiplexed to perform the signal detection.

公开(公告)号：US20200092736A1

公开(公告)日：2020-03-19

申请号：US16692460

申请日：2019-11-22

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Hiroaki AMINAKA ,  Hiroto SUGAHARA ,  Yoshikazu KAKURA ,  Kazushi MURAOKA

IPC: H04W24/08 ,  H04W76/27 ,  H04B17/309 ,  H04B17/24 ,  H04B17/318 ,  H04B17/382 ,  H04W24/10 ,  H04W16/14 ,  H04W88/02 ,  H04W72/04 ,  H04W88/10 ,  H04L5/00 ,  H04W72/08

Abstract: A radio terminal (2) is used in a radio communication system (100) and communicates with a radio station (1). The radio terminal (2) includes a measurement unit (20). The measurement unit (20) operates to perform, using a terminal measurement procedure for executing a first terminal measurement corresponding to radio access technology applied to the radio communication system (100), a second terminal measurement of a shared frequency shared by a plurality of radio systems including the radio communication system (100).

公开(公告)号：US20190029029A1

公开(公告)日：2019-01-24

申请号：US16072205

申请日：2016-12-15

Applicant: NEC CORPORATION

Inventor： Taichi OHTSUJI ,  Hiroaki AMINAKA ,  Kazushi MURAOKA

IPC: H04W72/12 ,  H04W72/04 ,  H04W76/27 ,  H04W92/18 ,  H04W88/04

CPC classification number: H04W72/0406 ,  H04L5/00 ,  H04L5/0048 ,  H04L5/0053 ,  H04W4/023 ,  H04W72/042 ,  H04W76/27 ,  H04W88/04 ,  H04W92/18

Abstract: A network apparatus (2) transmits, to at least one of a D2D transmitting terminal (1A) and a D2D reception terminal (1B), a first control signal (501) including an indication indicating which of first and second D2D transmission modes is activated. The first D2D transmission mode conforms to a first resource pattern that is repeated every first time period. The second D2D transmission mode conforms to a second resource pattern that is repeated every second time period, the second time period being the same as or different from the first time period. The second resource pattern is defined so as to allow low-latency transmission. In an example, the second resource pattern does not include a control channel subframe pool that is used for transmission of D2D control information indicating resource allocation for data transmission.

公开(公告)号：US20180213385A1

公开(公告)日：2018-07-26

申请号：US15578396

申请日：2016-01-21

Applicant: NEC Corporation

Inventor： Hiroaki AMINAKA ,  Kazushi MURAOKA

IPC: H04W8/00 ,  H04W56/00

CPC classification number: H04W8/005 ,  H04W56/001 ,  H04W88/04 ,  H04W92/18

Abstract: A wireless terminal (1A) receives a discovery signal (201) wirelessly transmitted from another wireless terminal (1B) via device-to-device (D2D) communication, and transmits a discovery report (202, 302) to a network (2, 3) via cellular communication (101). The discovery report indicates at least one of: (a) an identifier of the other wireless terminal (1B); (b) an identifier(s) of one or more D2D communication pairs to which the other wireless terminal (1B) belongs; (c) an identifier of a base station or a cell with which the other wireless terminal (1B) is associated; (d) received power of a discovery signal from the other wireless terminal (1B); and (e) the number of detections of the discovery signal from the other wireless terminal (1B). It is thus possible to provide a discovery report containing contents suitable for use in a network.