Sharp Kabushiki Kaisha Corporation

Hideaki Shinmei

Katsutoshi Ishikura

Atsushi Yamazaki

Tamotsu Satoh

Hiroyuki Saga

Hirokazu Kobayashi

Hiroki Kashiwagi

Shoichi Shitara

Masamori Tokuda

Kazuhiko Ikehata

Kennichi Iijima

A terminal device includes: a communication unit configured to communicatively connect with a first network using a first frequency band or a second frequency band; a detection unit configured to detect communication of a second network that is performed using the second frequency band; an interference avoidance unit configured to perform a process of avoiding radio interference by the second network; and a control unit configured to perform control such that the interference avoidance unit performs the process of avoiding radio interference by the second network band in a case that an identifier identifying communication of the second network detected by the detection unit includes a specific identifier.

Terminal device, communication method, and program

A terminal device and a communication system which are capable of starting LAA communication with a lower possibility of interference are provided. A communication unit performs communication using each of a first network and a second network. A communication control unit notifies a base station device constituting the first network of allocated frequency band exclusion information indicating a frequency band to be excluded from frequency bands allocated to the terminal device, and controls the communication unit so as to connect to the base station device using a frequency band allocated by the base station device.

Terminal device and communication system

A wireless circuit () which is capable of simultaneously outputting a plurality of transmission signals, including: a transmission signal selection circuit () which selectively outputs a detecting object signal out of a plurality of transmission signals; and a detection circuit () which detects a power of the detecting object signal thus outputted. This enables to provide, by use of a compact configuration, a technique for individually detecting transmission signals which are simultaneously generated by a respective plurality of transmission circuits.

Wireless circuit

A wireless communications system including a mobile terminal and a mobile receiver. The receiver includes: a reception level acquisition section for acquiring reception levels of wireless signals, wherein the reception level acquisition section measures the reception levels of signals; a transmission level acquisition section for acquiring transmission levels of the terminal, wherein the transmission level acquisition section retrieves transmission levels of the terminal contained in signals; a difference value calculation section for calculating respective difference values between the transmission levels and the reception levels; and relative distance estimation section for estimating a relative distance to the terminal in accordance with the respective difference values. The reception level acquisition section retrieves reception levels of signals sent from the wireless communications apparatus to the terminal contained in signals of the terminal; and the transmission level acquisition section measures a transmission level of the wireless communications apparatus to the terminal.

Wireless communication apparatus with relative distance estimation means

Growing community of inventors

Sakai, Japan

Hideaki Shinmei