Panasonic Intellectual Property Corporation of America

Sun Patent Trust

Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Wi-fi One, LLC

Canon Kabushiki Kaisha

Panasonic Intellectual Property Management Co., Ltd.

Harris Corporation

Optis Wireless Technology, LLC

Apple Inc.

Interdigital Patent Holdings, Inc.

Other

Matsushita Electrical Industrial Co., Ltd.

National Institute of Information and Communications Technology, Incorporated Administrative Agency

Matshushita Electric Industrial Co., Ltd.

Yutaka Murakami

Tomohiro Kimura

Mikihiro Ouchi

Masayuki Orihashi

Akihiko Matsuoka

Kiyotaka Kobayashi

Shutai Okamura

Shinichiro Takabayashi

Nobuhiko Hashida

Katsuaki Abe

Takaaki Kishigami

Hiroyuki Motozuka

Shozo Okasaka

Kenji Takahashi

Yasushige Tomiyoshi

Yoichi Nakagawa

Yoshio Urabe

Osamu Mizuno

Kazuaki Takahashi

Tohru Nakamura

Choo Eng Yap

Hisao Koga

Nobutaka Kodama

Kunio Okada

Morikazu Sagawa

Ryutaro Monden

Nobuyuki Matsui

Tetsushi Tamura

Haruhiko Uneo

Yoshiaki Kawamura

Hisayuki Enshu

Haruo Fujita

Daichi Imamura

Yasuaki Yuda

Hideki Nakata

Hideki Aikoh

Naoya Yosoku

Takao Hayashi

Rahul Malik

Satoshi Nagata

Toshiyuki Morii

Hironori Tomita

Kiyohiro Tsunekawa

Masamichi Akashi

Toru Nakamura

Akira Matsubara

Akio Sugaya

Takeshi Utsunomiya

Yukio Kanakubo

Yoichi Toyokura

Masami Kashiwazaki

Shuji Ozawa

Shigeki Hirooka

Hiroharu Takahashi

Hideyuki Kitani

Takenori Sakamoto

Suguru Fujita

Hidekuni Yomo

Hirohito Mukai

Hiroshi Yamamoto

Michiaki Matsuo

Yoshinori Kunieda

Kenichi Miyamori

Tomotada Kamei

Kenichi Nakano

Junya Aso

Hideki Aiko

Shinichir Takabayashi

Seisuke Shirai

Hisashi Aizawa

Masayuki Orihasi

Satoshi Hasako

Tsuneo Hikokubo

A mobile terminal is a communication device that communicates using visible light, and includes: a plurality of light emitters, each of which is disposed along the front surface of the mobile terminal and transmits a visible light signal; and a plurality of light receivers, each of which is disposed along the front surface and receives a visible light signal. The plurality of light emitters are disposed on the left side of all of the plurality of light receivers, and the plurality of first light receivers are disposed on the right side of all of the plurality of light emitters.

Communication device

A communication system includes: a plurality of cameras that generate image data by capturing images; a server that stores the image data generated by each of the plurality of cameras; and a plurality of transmission devices in one-to-one correspondence with the plurality of cameras. Each of the plurality of transmission devices transmits light including, as a visible light communication signal, information related to communication for accessing a storage location at which the image data generated by a corresponding one of the plurality of cameras is stored in the server.

Communication system, terminal, control method, and recording medium

A transmission device that improves data reception quality includes: a first pilot inserter that inserts a pilot signal into a first precoded signal; a phase changer that applies a phase change of i×Δλ to the second precoded signal, where i is a symbol number and an integer that is greater than or equal to 0; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. Δλ satisfies π/2 radians<Δλ<π radians or π radians<Δλ<3π/2 radians. When the communications scheme is an OFDM scheme, the phase changer and the phase changer apply a phase change, and when the communications scheme is a single-carrier scheme, do not apply a phase change.

Transmission device and transmission method

A controller, which is a communication device, includes: a transfer unit including a function of transferring data received from a first terminal to another communication device via wireless communication; and a determination unit configured to determine whether first information is included in the data received by the transfer unit, the first information indicating that the data is to be multicast. The transfer unit is further configured to multicast the data to a second terminal when the determination unit determines that the first information is included in the data, the second terminal and the first terminal being different terminals.

Control method and relay device for multicasting data

A transmission method includes: in a first period, causing a light source to emit light having a first luminance; and in a second period, causing the light source to transmit an optical signal by causing the light source to alternately emit light having a second luminance and light having a third luminance lower than the second luminance.

Transmission method, reception method, transmission device, and reception device

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.

Method of signal generation and signal generating device

In a communication system that includes an access point, a repeater #1, and a repeater #2 and wirelessly communicates with a terminal, the access point wirelessly communicates with the repeater #1 on at least a first channel included in a first frequency band and wirelessly communicates with the repeater #2 on at least a second channel included in a second frequency band different than the first frequency band, the repeater #1 wirelessly communicates with the terminal on at least a third channel included in the second frequency band, and the repeater #2 wirelessly communicates with the terminal on at least a fourth channel included in the first frequency band.

Communication system, terminal, and control method

A transmitting method includes: configuring a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating a plurality of transmission data to a plurality of areas; and transmitting the frame. The plurality of areas are each identified by at least one time resource among resources and at least one frequency resource among frequency resources. The frame includes a first period in which a preamble is transmitted, and a second period in which the plurality of transmission data are transmitted by at least one of time division and frequency division. The second period includes a first area, and the first area includes a data symbol generated from first transmission data, a data symbol generated from second transmission data and subsequent to the data symbol generated from the first transmission data, and a dummy symbol subsequent to the data symbol generated from the second transmission data.

Transmitting apparatus for transmitting an OFDM signal generated by performing IFFT processing on a preamble and one or more subframes into which pilot signals are inserted

A transmitting apparatus includes: a frame configuration unit that configures a frame conforming to orthogonal frequency-division multiple access (OFDMA) and including a plurality of time-frequency resources, each being a resource defined by time and frequency; and a transmitter that transmits the frame configured by the frame configuration unit over radio waves. The frame configuration unit configures, as the frame, a frame including a resource for communication and a resource for sensing, the resource for communication being a time-frequency resource in which a symbol including communication data is disposed, and the resource for sensing being a time-frequency resource in which a symbol for sensing via radio waves transmitted by the transmitter is disposed.

Transmitting apparatus, control system, and transmitting method

A communication apparatus includes a receiver and a decoder. The receiver includes a plurality of antenna elements and, in operation, receives from a base station apparatus a modulated signal mapped to one of a plurality of subframes defined in a frame corresponding to a communicable range to which the communication apparatus belongs. The plurality of subframes are defined by time-division, frequency-division, or time-and-frequency division of the frame. A maximum number of modulated signals that can be simultaneously transmitted in a subframe from the base station apparatus varies depending on the communicable range. The decoder, in operation, decodes the received modulated signal.

Communication apparatus and communication method

In the present invention, data is transmitted more suitably in an emergency state. This communication system comprises: a management device that manages first data including settings pertaining to communication during a normal state, and second data including settings pertaining to communication during an emergency state; and a communication instrument that controls a communication operation to another communication instrument in the normal state on the basis of the first data received from the management device, and that controls a communication operation to the other communication instrument in the emergency state on the basis of the second data received from the management device.

Communication system, management device, communication instrument, and communication control method

Provided is a transmitting device which can expand a communication range when performing multicast/broadcast communication. The transmitting device includes a plurality of transmission antennas, and includes: a signal processor which generates a first baseband signal by modulating data of a first stream, and a second baseband signal by modulating data of a second stream; and a transmitter which generates, from the first baseband signal, first transmission signals having different directivities, generates, from the second baseband signal, second transmission signals having different directivities, and transmits the first transmission signals and the second transmission signals at a same time. When the transmitter has received, from a terminal, a request to transmit the first stream, the transmitter further generates, from the first baseband signal, third transmission signals which are different from the first transmission signals and have different directivities, and transmits the third transmission signals.

Transmitting method, transmitting device, receiving method, and receiving device

Provided are a frame configuring unit configured to configure a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating time resources and frequency resources to a plurality of transmission data, and a transmitter which transmits the frame. The frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, a second period in which a plurality of transmission data are transmitted by time division, a third period in which a plurality of transmission data are transmitted by frequency division, and a fourth period in which a plurality of transmission data are transmitted by time division and frequency division.

Transmitting method, receiving method, transmitting apparatus, and receiving apparatus

A transmitting method includes: configuring a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating time resources and frequency resources to a plurality of transmission data; and transmitting the frame, wherein the frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, and a second period in which the plurality of transmission data are transmitted by at least one of time division and frequency division, and among the plurality of OFDM symbols, OFDM symbols included in the second period include pilot symbols arranged along a time axis with a predetermined spacing therebetween, and a predetermined number of data symbols.

A signal generation method is used in a transmission device that transmits a plurality of transmission signals from a plurality of antennas at the same frequency and at the same time, in the case where larger power change is performed on a first transmission signal than on a second transmission signal during generation process of the first transmission signal and the second transmission signal, the first transmission signal and the second transmission signal are mapped before the power change such that a minimum Euclidian distance between possible signal points for the first signal is longer than a minimum Euclidian distance between possible signal points for the second signal.

Signal generation method, transmission device, reception method, and reception device

Growing community of inventors

Kanagawa, Japan

Yutaka Murakami