Fujitsu Ten Limited

Fujitsu Semiconductor Limited

Renesas Electronics Corporation

Fujitsu Corporation

Toyota Jidosha Kabushiki Kaisha

Renesas Technology Corp.

Susumu Nishihashi

Yukio Ishikawa

Kaoru Noumi

Yasuyuki Umezaki

Hiroaki Shimauchi

Yukio Fujisawa

Hidetaka Ebeshu

Shigeo Koide

Tomoyuki Katou

Tomohide Kasame

Tsuyoshi Takatori

Satoshi Yamanaka

Shinji Yamashita

Junji Takahashi

Nobuaki Kawasoe

Akiko Furuya

Tomohiro Matsuo

Satoshi Fukui

Kenji Hontani

Masayoshi Kusumoto

Kokoro Hayashi

Naoto Shimoji

Nobuaki c/oFujitsu Ltd Kawasoe

Akiko c/oFujitsu Ltd Furuya

Yasuyuki c/oFujitsu Limited Umezaki

Naoto c/oFujitsu Ltd Shimoji

Masayoshi c/oFujitsu Ltd Kusumoto

A gateway apparatus for performing transfer control of frame data between communication channels includes a routing map that stores ID information about the frame data and information about a communication channel that uses the ID information, and a search engine unit that routes the frame data to a transfer destination on the basis of the ID information of the frame data received and the routing map. The search engine unit does not transfer the frame data to the transfer destination when the ID information about the frame data received is ID information that is not used in the communication channel through which the frame data is received.

Gateway apparatus and data transfer control method

An error detector has a parity bit generator which generates error detection data for data strings sent from a CPU I/F to a memory, a parity checker which detects an error in the data strings output from the memory based on the error detection data, and a selector circuit which switchingly outputs the data from the parity bit generator and the data from a CPU which sends diagnostic data. While the selector circuit is switched to output the data from the CPU, based on the error detection data output from the selector circuit, the error detector conducts a failure diagnosis of error detection functions including at least one of the parity bit generator and the parity checker.

Error detector and error detection method

A data search device that is provided in a communication apparatus detects a memory area storing data to be transmitted from a memory unit having memory areas defined by IDs allotted to data. The data search device includes: a first flag that is provided for each of the memory areas of the memory unit, and indicate whether the data in the corresponding memory area is updated; a second flag that is provided for each group consisting of a predetermined number of the first flags, and indicates a data update state when at least one set of data in the first flags in the corresponding group indicates an updated state; and a search control unit that detects the memory area storing the data to be transmitted, by searching for the corresponding first flag after detecting the second flag.

Data search device and gateway device in communication apparatus

A gateway apparatus for performing transfer control of frame data between a plurality of different communication channels is provided with a time stamp unit for adding time stamp information to received frame data and a data discarding unit for determining processing delay of the frame data or abnormality of the apparatus by referring to the time stamp information and for deleting the time stamp information added to the frame data at the time of sending the frame data.

Gateway apparatus and data managing method

A communication conversion apparatus achieve efficient conversion without conversion delay and converts messages that effect communication with different communication protocols and schedules. In a message conversion apparatus that performs message conversion of different communication protocols, a routing circuit and a scheduler circuits that perform scheduling of the different communication protocols are separately provided. And time-triggered scheduling and event-triggered scheduling are separately performed. Conversion of FlexRay and CAN messages can be efficiently implemented.

Communication message conversion apparatus and communication message conversion method

There is provided a gateway apparatus that controls a forwarding process of frame data between multiple communication channels, said gateway apparatus including a search engine that is respectively provided for each of the multiple communication channels to route the frame data between the multiple communication channels, and a first storage portion that is respectively provided for each of the multiple communication channels to temporarily stores the frame data routed.

Gateway apparatus and routing method

Growing community of inventors

Kobe, Japan

Susumu Nishihashi