Fujitsu Component Limited

Tatsuya Kakehashi

Kimihiro Maruyama

Masahiro Yanagi

Masakazu Muranaga

Shinya Yamamoto

Masaru Sakurai

A wireless module including: a substrate that includes a first surface and a second surface on the back side of the first surface; a plurality of signal terminals that are provided on the first surface and the second surface, input and output signals; an antenna provided on the first surface; a signal processing circuit that is provided on the second surface, is connected between the signal terminals and the antenna, and performs various signal processings on signals input from the signal terminals and the antenna; wherein the signal terminals are arranged in horizontal symmetry on the first surface and the second surface, arranged at the same positions of the first surface and the second surface, and connected to a single signal line in the substrate.

Wireless module

A wireless communication device that communicates with a plurality of slave units, including: a transmitter that transmits a data transmission instruction including a first identification information of a single slave unit among the plurality of slave units; a receiver that receives data corresponding to the data transmission instruction from the single slave unit; wherein the transmitter transmits to the plurality of slave units acknowledgment data which has incorporated second identification information into an acknowledgment to the data received from the single slave unit, the second identification information indicating another slave unit which transmits data corresponding to a next data transmission instruction to the wireless communication device.

Wireless communication device and wireless communication system

A communication device communicatable with an information processing device, including: a communicator that communicates with the information processing device; a detector that detects the movement of the communication device; an acquirer that acquires position information of the communication device by using one of different communication methods; and a selector that selects a communication method in which the acquirer acquires the position information, based on a selection signal transmitted from the information processing device; wherein when the detector detects the movement of the communication device, the communicator communicates with the information processing device, and the acquirer acquires the position information of the communication device by using the communication method selected by the selector.

Communication device and communication system

A communication system in which a communication apparatus includes a calculation unit configured to calculate, upon receiving a search signal from a new communication apparatus, a first time length by multiplying a first weighting time length by a relay count in a communication route to a destination, a second time length by multiplying a second weighting time length shorter than the first weighting time length by the signal strength of each communication link in the communication route, and a third time length by adding the first and second time lengths, and a transmission unit configured to transmit a response signal upon passage of the third time length from the receipt of the search signal, wherein upon receiving the response signal from one of the communication apparatuses ahead of any other response signals, the new communication apparatus sets the one of the communication apparatuses as the most adjacent relay point.

Communication system and communication apparatus

A communication apparatus includes a detection unit that detects a first apparatus that is able to wirelessly communicate with the communication apparatus; a first selection unit that determines a route for communication between the communication apparatus and a communication destination, the route may include an intervening apparatus that relays communication between the communication apparatus and the communication destination, and selects, if plural routes are determined, a first route where a number of the intervening apparatuses is smallest from among the determined routes; and a second selection unit that, when two or more first routes are selected by the first selection unit, calculates, for each of the first routes, a sum of squares of each of first signal strength between two apparatuses in the determined first route as a second signal strength, and selects the route having the highest second signal strength from the determined first routes.

Communication apparatus

A module board includes a first board including a first surface and a second surface, a second board where its first surface faces the second surface of the first board, an external electrode formed on the exterior of the second board, and a joining member joining the external electrode and a terminal provided on the second surface of the first board. The external electrode includes a first surface part positioned on the first surface of the second board, a second surface part positioned on a second surface of the second board opposite to the first surface, and a connecting part connecting the first and second surface parts. The joining member includes a joining surface joining to the external electrode. The joining surface covers the first surface part and at least a portion of the connecting part that is closer to the first surface part than to the second surface part.

Growing community of inventors

Tokyo, Japan

Tatsuya Kakehashi