Fujitsu Corporation

Oki Electric Industry Co., Ltd.

Masahiro Machida

Yukio Hayashi

Yasuaki Kamimura

Takashi Noguchi

Makoto Terui

Yoshihiko Shirokura

Takao Ito

Shigemasa Matsubara

Masashi Kuwahara

Hiroaki Tamai

Naoto Miyauchi

Yosuke Nishikata

Joji Maruyama

Katsunori Hayashi

Takafumi Kawakami

Kazuya Takeuchi

Katsumi Okuda

Tetsuhiro Murata

Yuichi Deushi

Hajimu Hirai

A communication device is provided in a wireless multi-hop network. The communication device receives a sequence number, a divided time acquired by dividing a time width allocated for transmitting detected usage data by a division number, and the division number. The communication device calculates a remainder by dividing the received sequence number by the division number and calculates a transmission offset time based on the remainder and the divided time. The communication device transmits the usage data based on the calculated transmission offset time.

Communication device and communication method

A software update system includes an administration server, a wireless communication terminal, and a wireless-communication key station. The wireless communication terminal is configured to be connected to the administration server through a communication network. The a wireless-communication key station is configured to be positioned between the administration server and the wireless communication terminal, and to perform processing of distributing software of an update object transmitted from the administration server to the wireless communication terminal.

Wireless communication terminal, software update system, and software update method

An infrared emissive first insulating portion, which radiates heat transferred from a WCSP corresponding to an electronic part to a first conductive portion as infrared radiation with high efficiency, is formed on the first conductive portion lying in a through hole provided in a printed wiring board with the WCSP mounted thereon.

Electronic part mounting substrate, electronic part, and semiconductor device

Growing community of inventors

Tokyo, Japan

Masahiro Machida