Fujitsu Corporation

Fujitsu Ten Limited

Fujitsu Frontech Limited

Fujitsu Limied

Teruhisa Ninomiya

Manabu Kai

Tatsuya Kikuzuki

Hiromasa Yamauchi

Isamu Yamada

Yoshinori Tanaka

Naofumi Okubo

Ichirou Ida

Kazumi Kasai

Osamu Isaji

Tamio Saito

Makoto Hamaminato

Hiroki Akano

Yoshihiro Kawasaki

Hiroshi Kurihara

Toru Maniwa

Shunji Baba

Makoto Yoshida

Shigeru Hashimoto

Katsumi Kobayashi

Akihiro Wada

Eiji Matsumoto

Toshihiro Kunitake

Shinichi Shiotsu

Yoshiyasu Sugimura

Yoji Ohashi

Nobuhisa Aoki

Tsuyoshi Niwata

Andrey S Andrenko

Kaoru Yokoo

Masafumi Katoh

Yusuke Kawasaki

Kensuke Sawada

Satoru Nogami

Atsushi Honda

Hiroaki Kawasumi

Takahiro Koharagi

Shohei Ishikawa

Shiho Nakahara

Masashi Kuwahara

Takuji Furusawa

Masaharu Nozawa

Osamu Kuroda

Syunji Baba

Yuki Iwamasa

Iwamasa Yuki

An installation location determination device for a radio device, includes a memory and a processor. The memory stores device information on a transmitter and a receiver, and environment information. The processor executes a process including, performing first simulation using a ray tracing method based on the device information and the environment information to calculate first received signal strengths at a plurality of installation candidate points, located respectively at centers of a plurality of installation candidate locations where the receiver is to be installed, and a plurality of neighboring points set for each of the installation candidate points within a first distance from the installation candidate point, calculating second received signal strengths in the respective installation candidate locations based on a calculation result of the first received signal strengths, determining an installation location of the receiver based on the second received signal strengths, and outputting the installation location.

Installation location determination device and method for installation location determination of radio device

An information processing apparatus includes a memory, and a processor coupled to the memory and configured to obtain location information indicating locations of a wireless transmitter and a wireless receiver, simulate a first power of a first reception signal at the wireless receiver in a condition that a radio signal is transmitted from the wireless transmitter, identify a first probability distribution model in accordance with the first reception signal, identify a first parameter of the first probability distribution model in accordance with the first power and a propagation environment defined by the locations of the wireless transmitter and the wireless receiver indicated by the location information, and based on the first probability distribution model using the first parameter, simulate a second power of a second reception signal at around the wireless receiver.

Information processing apparatus, method and non-transitory computer-readable storage medium

An information processing apparatus includes, a memory that stores location information of a plurality of objects to be arranged within a three-dimensional space, and a processor. The processor performs a process. The process includes, generating first image data of the plurality of objects based on the location information, outputting the first image data to a display, determining a display plane including a location corresponding to one point of the first image, generating second image data which includes a display plane image and installation candidate marks, outputting the second image data to the display, determining whether a surface corresponding to any one of the installation candidate marks has been selected according to an inputted selection instruction, and determining the installation location of the wireless device based on the location corresponding to one point of the first image, and a location of the selected surface.

Information processing apparatus, and installation location determination method

There is provided a radio wave interference analysis apparatus configured to analyze a state of interference due to a plurality of interference signals of a plurality of interference sources on a target signal of a wireless device as an evaluation target at a reception point, the radio wave interference analysis apparatus including a memory, and a processor coupled to the memory and the processor configured to calculate a first probability of failure of reception of the target signal at the reception point due to collision of the target signal with an interference signal of the plurality of interference signals, calculate a second probability of failure of reception of the target signal at the reception point due to the interference signal of the plurality of interference sources, and output the first probability and the second probability.

Radio wave interference analysis apparatus, method, and medium

A base station apparatus includes a processor, a memory and a communication circuit. The processor is configured to set a waiting period in which a packet from a terminal device to which a connection has not been established is awaited. The memory is configured to store data that is processed by a terminal device to which a connection is established. The communication circuit is configured to, upon receiving a first packet from a communication terminal device in the waiting period, transmit to the communication terminal device a second packet containing the data and information used by the communication terminal device for establishing a connection.

Base station apparatus, wireless communication system and communication method

A radio analyzer includes a memory configured to store a first reference signal, and a processor coupled to the memory and configured to calculate a first correlation value between a received wave and a non-modulated wave, calculate a second correlation value between the received wave and the first reference signal in a target section of the received wave, the first correlation value being smaller than a first threshold value in the target section, and detect a modulated wave from the received wave based on the second correlation value.

Radio analyzer and detecting method

There is provided a wireless analysis apparatus including: a memory unit configured to store information of electric power distribution indicating a temporal change of a frequency spectrum; and a computing unit configured to perform a procedure including: generating a plurality of divided regions having predetermined band widths by dividing the electric power distribution, calculating a temporal change amount of electric power with regard to each of the divided regions, detecting a rising portion and a falling portion of the electric power on the basis of the calculated temporal change amount, and identifying an individual signal component in the electric power distribution on the basis of the positions of the rising portion and the falling portion in the divided regions.

Wireless analysis apparatus and wireless analysis method

A wireless communication system includes a transmission device, a relay device, and a reception device and is configured to execute direct communication of directly transmitting a wireless signal from the transmission device to the reception device without routing through the relay device and indirect communication of indirectly transmitting a wireless signal from the transmission device to the reception device through the relay device. The wireless communication system includes a controller configured to estimate a disconnection continuation time that is a time during which the direct communication is not executable in a case where the direct communication is not executable while the direct communication is repeatedly executed, continue to execute the direct communication when the disconnection continuation time is shorter than a threshold time, and execute the indirect communication when the disconnection continuation time is longer than the threshold time.

Wireless communication system, wireless communication method, transmission device, control method, and recording medium

A BAN system includes multiple terminal apparatuses connected by wireless communication, where a terminal apparatus of the multiple terminal apparatuses is configured to identify in which direction acceleration has changed, the direction being identified based on a measurement result of a sensor of the terminal apparatus, the sensor being configured to measure acceleration; and to refer to information that specifies corresponding to places where the plurality of terminal apparatuses is to be attached to a body, directions in which acceleration changes when the body performs a given behavior, and determines based on the identified direction, a place where the terminal apparatus is attached to the body.

BAN system, terminal apparatus, BAN communications method, and computer product

An antenna device, includes: a ground plate to which first and second antennas, each including a radiating element and a ground terminal, are connected, with one of the first and second antennas being powered, the ground plate including: a first slit extending from a portion where the ground terminal of one antenna of the first and second antennas is connected to the ground plate, in a direction along to the ground terminal, and a second slit extending from the tip of the first slit in a direction along to the radiating element.

Antenna device, electronic apparatus, and wireless communication method

An antenna includes a first loop, a second loop which encloses an outer side of the first loop and is separated from the first loop by a slit and both end of which are merged with both ends of the first loop, and IC chip connection parts provided in a portion where the first loop and the second loop are merged, wherein a loop length of the first loop and a loop length of the second loop are equal to or shorter than one third of a wavelength corresponding to a desired frequency resonant with an IC chip connected to the IC chip connection parts.

Antenna and RFID tag

There is provided an antenna device for transmitting a radio wave to a tag capable of receiving the radio wave includes a first layer, a second layer, and a first plate which is disposed on or above the second layer. These are electrically conductive. The second layer is disposed apart from the first layer and includes a plurality of non-electrically conductive portions to generate an electromagnetic wave travelling along a first axis above the second layer. Further, the first plate is disposed on or above the second layer to allow the tag to receive the radio wave transmitted from the antenna.

Antenna device and RFID system

A radio wave control apparatus includes a detecting unit that detects an object, other than a communication target device, in a radiation range to which a radio wave radiating unit radiates predetermined radio waves in each of a plurality of radiation directions; and a radiation range determining unit that determines a radiation range in each of the radiation directions such that the predetermined radio waves are radiated over a predetermined communication range, in which the communication target device is communicable using the predetermined radio waves, and no no-communication area that is caused when the predetermined radio waves reflected on the object is caused in the communication range.

Radio wave control apparatus, radio wave control system, and radio wave control method

A metal sheet including: a first and second metal sections disposed at point symmetrical positions about a center point of the metal sheet, wherein

Metal sheet and tag set

In a planar inverted F antenna, a second radiation element is provided parallel to the GND surface and extending partially with respect to a first radiation element in a longitudinal direction, so as to substantially increase a width of the first radiation element in the vicinity of a power supply section.

Planar inverted F antenna

Growing community of inventors

Kawasaki, Japan

Teruhisa Ninomiya