公开(公告)号：US20250106782A1

公开(公告)日：2025-03-27

申请号：US18294703

申请日：2021-09-01

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Motoharu SASAKI ,  Daisuke MURAYAMA ,  Shota NAKAYAMA ,  Takatsune MORIYAMA ,  Yasushi TAKATORI

IPC: H04W52/28 ,  H04W16/18

Abstract: In a base station control system including a first base station whose deployment position has not been determined and a base station control apparatus, the base station control apparatus reduces a deviation in the number of terminals connected to each base station by including a clustering unit configured to repeat clustering for dividing a plurality of terminals into clusters for each of the first base station and a second base station while fixing a position of the existing second base station to which the plurality of terminals is connected and changing a position of the first base station, a calculation unit configured to calculate a number of first terminals connected to the first base station and a number of second terminals connected to the second base station for each of a plurality of transmission powers of the first base station in a case where the first base station is deployed at a position at a point in time at which the clustering is completed, and a selection unit configured to select a transmission power of the first base station on the basis of the number of first terminals and the number of second terminals.

公开(公告)号：US20250052797A1

公开(公告)日：2025-02-13

申请号：US18723488

申请日：2021-12-24

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Ryotaro TANIGUCHI ,  Tomoki MURAKAMI ,  Tomoaki OGAWA ,  Yasushi TAKATORI ,  Minoru INOMATA

IPC: G01R29/08

Abstract: The present disclosure relates to a propagation environment estimation method suitable for environment estimation of a wireless signal using a scale model. The method includes the following steps. The scale model is created. A light source regarded as a transmission station of the radio wave is installed in the scale model, and a measurement range in the scale model is irradiated by the light source. The measurement range irradiated by the light source is captured, and gradation of light obtained by the capture is converted into a reception level of the radio wave.

公开(公告)号：US20240389147A1

公开(公告)日：2024-11-21

申请号：US18691460

申请日：2021-10-01

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Shoko SHINOHARA ,  Yusuke ASAI ,  Yasushi TAKATORI ,  Junichi IWATANI ,  Yoshitaka SHIMIZU ,  Tomoyuki YAMADA

IPC: H04W74/0816 ,  H04W52/02 ,  H04W72/121 ,  H04W84/12

Abstract: In a wireless communication method between a base station and a plurality of wireless terminals, the base station includes a plurality of first wireless modules that perform wireless communication using different channels that do not overlap each other, and each of the plurality of wireless terminals includes a second wireless module that performs wireless communication using any one communication channel. The wireless communication method includes executing a channel switching process of switching use states of the plurality of first wireless modules according to a predetermined schedule so as to enable any one of the plurality of first wireless modules to carry out transmission and to prohibit the other thereof from carrying out transmission. Further, there is a sleeping of an operation of the second wireless module while the first wireless module that performs wireless communication using the communication channel is prohibited from carrying out transmission.

公开(公告)号：US20240357389A1

公开(公告)日：2024-10-24

申请号：US18685516

申请日：2021-08-27

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Masashi IWABUCHI ,  Tomoaki OGAWA ,  Hiroki YOSHIOKA ,  Masayoshi NABESHIMA ,  Yasushi TAKATORI

IPC: H04W24/08 ,  H04B17/318

CPC classification number: H04W24/08 ,  H04B17/318

Abstract: A user data rate estimation device acquires a reception power in a user, and receives input of information regarding a communication environment of the user. Next, the device calculates a wireless resource to be allocated to the user on the basis of information regarding a bandwidth, a scheduling method, and the number of users included in the information regarding the communication environment, calculates an overhead on the basis of information regarding a communication standard, a frequency band, and a bandwidth included in the information regarding the communication environment, and determines a communication mode on the basis of the reception power or communication quality information converted from the reception power. Then, the device calculates a user data rate on the basis of the wireless resource, the overhead, the communication mode, and information regarding the number of spatial streams included in the information regarding the communication environment.

公开(公告)号：US20240340829A1

公开(公告)日：2024-10-10

申请号：US18682267

申请日：2021-08-18

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Akira KISHIDA ,  Kengo NAGATA ,  Shoko SHINOHARA ,  Hanae OTANI ,  Yusuke ASAI ,  Yasushi TAKATORI

IPC: H04W56/00 ,  H04W74/0833

CPC classification number: H04W56/0045 ,  H04W74/0833

Abstract: A transmitting station which is a station that transmits a wireless signal includes a first wireless signal processing unit, a second wireless signal processing unit, and a transmission timing adjustment unit. The first wireless signal processing unit transmits and receives a wireless signal using a first channel. The second wireless signal processing unit transmits and receives a wireless signal using a second channel different from the first channel. The transmission timing adjustment unit adjusts transmission timings of first data and second data on the basis of a first status associated with the first wireless signal processing unit and a second status associated with the second wireless signal processing unit.

公开(公告)号：US20240340042A1

公开(公告)日：2024-10-10

申请号：US18291245

申请日：2021-08-06

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Masashi IWABUCHI ,  Yoghitha RAMAMOORTHI ,  Tomoaki OGAWA ,  Yasushi TAKATORI

IPC: H04B7/04 ,  H04B7/0408

CPC classification number: H04B7/04013 ,  H04B7/0408

Abstract: A relay apparatus includes a plurality of reflection elements that applies independent phase shifts to an incoming wave, a communication circuitry that receives transmission point information from one or more transmission points, an element allocation circuitry, and a phase control circuitry. The element allocation circuitry determines the number of communication links to be established via the relay apparatus based on the transmission point information, determines the number of reflection elements to be allocated to each of the communication links, and determines a reflection element to be allocated to each of the communication links according to the number of the reflection elements. The phase control circuitry determines the phase weights so that a beam directed to a reception point being a communication destination of each communication link is generated by a reflection wave generated by each reflection element allocated to each of the communication links.

公开(公告)号：US20240334468A1

公开(公告)日：2024-10-03

申请号：US18580165

申请日：2021-07-20

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Shoko SHINOHARA ,  Yusuke ASAI ,  Yasushi TAKATORI ,  Junichi IWATANI ,  Tomoyuki YAMADA ,  Yoshitaka SHIMIZU

IPC: H04W72/542 ,  H04W72/0446 ,  H04W76/20

CPC classification number: H04W72/542 ,  H04W72/0446 ,  H04W76/20

Abstract: A wireless communication system includes a plurality of wireless communication apparatuses forming a wireless communication network. The system also includes one or a plurality of control apparatuses that controls the plurality of wireless communication apparatuses. Each of the plurality of wireless communication apparatuses includes a plurality of network interface controllers (NICs) that performs wireless communication through different channels that do not overlap each other. The control apparatus executes channel switching processing of switching a use state of the plurality of NICs in each wireless communication apparatus. The control apparatus controls the plurality of wireless communication apparatuses to use NICs of the same channel in the same period. The control apparatus controls to share connection information regarding each of the plurality of NICs in advance before the channel switching processing.

公开(公告)号：US20240098783A1

公开(公告)日：2024-03-21

申请号：US18276449

申请日：2021-02-18

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hanae OTANI ,  Akira KISHIDA ,  Kengo NAGATA ,  Yusuke ASAI ,  Yasuhiko INOUE ,  Yasushi TAKATORI

IPC: H04W74/08

CPC classification number: H04W74/0808

Abstract: A wireless apparatus according to one aspect of the present invention includes a reception unit configured to receive, on a frequency channel, a frame including first identification information for identifying the priority level of the frame, and a carrier sensing control unit configured to determine a threshold based on the first identification information, and determine a usage state of the frequency channel based on a comparison between received power of the frame and the determined threshold.

公开(公告)号：US20240097775A1

公开(公告)日：2024-03-21

申请号：US18275233

申请日：2021-02-19

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Riku OMIYA ,  Tomoaki OGAWA ,  Tomoki MURAKAMI ,  Yasushi TAKATORI

IPC: H04B7/145

CPC classification number: H04B7/145

Abstract: A wireless communication system includes a sensor that acquires a position of an obstacle present between a transmitting station and a receiving station; an obstacle region detector that detects an obstacle region on the basis of the position acquired by the sensor; and a reflector region setter that sets, as a reflector setting region, a region on an opposite side of the obstacle region with reference to a tangent from the transmitting station toward the obstacle region and on an opposite side of the obstacle region with reference to a tangent from the receiving station toward the obstacle region. Further, there is a reflector selector that selects a reflector present in the reflector setting region among the plurality of reflectors, and a controller that controls communication such that the receiving station and the transmitting station perform wireless communication by radio waves reflected by the reflector selected by the reflector selector.

公开(公告)号：US20240064835A1

公开(公告)日：2024-02-22

申请号：US18269848

申请日：2021-03-24

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Akira KISHIDA ,  Kengo NAGATA ,  Yasuhiko INOUE ,  Yusuke ASAI ,  Yasushi TAKATORI

IPC: H04W76/15 ,  H04L1/1607

CPC classification number: H04W76/15 ,  H04L1/1642

Abstract: A transmitting station (TX) according to an embodiment includes first and second wireless signal processing units (STA1 and STA2) and a link management unit (LM). The first and second wireless signal processing units transmit wireless signals using first and second channels, respectively. The link management unit establishes multi-link with a receiving station. The link management unit manage communication in which the multi-link are used and store first information (TBM) indicating a sequence number of transmission target data. When second information (RBM) indicating the sequence number of the data received by the receiving station is received from the receiving station via the first or second wireless signal processing unit, the link management unit sets a bit corresponding to the sequence number indicated by the second information in the first information as a transmitted bit.