Fujitsu Corporation

Satoshi Esaka

Yoshihiro Watanabe

Yoshiharu Kato

Satoshi Kakuma

Shiro Uriu

Masami Murayama

Takashi Hatano

Yoshihiro Uchida

Kenichi Okabe

Mikio Nakayama

Jun Itoh

Yasuhiro Aso

Jin Abe

Naoyuki Izawa

Hiroshi Nishida

Eiji Ishioka

Noriko Samejima

Shigeru Sekine

Miyuki Kawataka

Fumio Hirase

Yoshiyuki Karakawa

Yasuhiro Nishikawa

Shinichi Araya

Nobuyuki Tsutsui

Atsuko Suzuki

Shouji Kohira

Atsushi Kagawa

Yoshihisa Tsuruta

Hiromi Yamanaka

Taiji Kondo

Tatsuya Soneda

Kenji Maeda

Yoshiyuki Jufuku

Hideki Nagino

Yasusi Kobayasi

Masayuki Furuta

Kiyoshi Nakagawa

Hiroki Okumura

Yasusi Kobayashi

Masataka Kushigemachi

A node device includes: a communication unit to transmit a data frame containing frequency information and receive the data frame; a storage unit to store a table in which frame identification information and the frequency information are associated; and a control unit to: determine whether a destination of the received data frame is its own node device; determine whether the frame identification information of the received data frame is registered in the table; determine whether the number of transmission times is less than or equal to the number of transmission times corresponding to the frame identification information registered in the table; update the frequency information corresponding to the frame identification information registered in the table with the frequency information of the received data frame; and increase the number of transmission times, wherein the communication unit transmits the data frame for which the number of transmission times is increased.

Node device and data relaying method

An automatic frequency monitoring circuit automatically monitors a frequency of a clock related to an operation of a device to be monitored. In the automatic frequency monitoring circuit, a frequency detecting unit detects, upon detecting a predetermined momentum, the frequencies of a monitoring target clock during a predetermined time for a predetermined number of times and treats as a detection frequency of the monitoring target clock, an average of the frequencies that are detected for the predetermined number of times. A frequency monitoring unit monitors, upon the frequency detecting unit detecting the detection frequency of the monitoring target clock, whether the frequency of the monitoring target clock during the predetermined time is within a predetermined fluctuation range based on the detection frequency.

Automatic frequency monitoring circuit, electronic device, automatic frequency monitoring method, and automatic frequency monitoring program

In an integrated circuit board, a plurality of integrated circuits to be checked are connected together in a star shape. Operation clock data for JTAG of each integrated circuit and check data for checking each integrated circuit are stored. When an integrated circuit to be checked is specified, operation clock data for JTAG and check data for the specified integrated circuit are determined. With an operation clock for JTAG according to the determined operation clock data for JTAG, the determined check data is input to the specified integrated circuit. Based on the check data and output data output from the integrated circuit to which this check data is input, the integrated circuit board determines a malfunction in the integrated circuit, and then stores the determination result in a storage device.

Integrated circuit board with JTAG functions

A switch station including an ATM switch; a memory storing control data for operations of the switch station; an intra-station device, accommodating a subscriber line, performing communication operation on subscriber ATM cell; a control processor generating control information in link access protocol (LAP) format; and an interface unit converting LAP control information into ATM cell to the intra-station device through the ATM switch, wherein the control information is communicated according to LAP, the intra-station device receives the control information and transmits a direct memory access request to obtain control data stored in the memory, the interface unit obtains and converts the data format of the control data into ATM cell to transmit to the intra-station device through the switch, and the intra-station device performs the communication operation on the subscriber ATM cell based on the control data received through the switch.

Intra-station control system for connectionless communications system

In a mobile communication system holding accounting information of a mobile terminal in a database of a mobile exchange, a mobile terminal controller is provided in an offerer of pay facilities, for transmitting dummy or random location information to the mobile terminal, for connecting a call to the mobile exchanges to provide the mobile exchange with user information when the mobile terminal transmits a location registration demand message with the user information in response to the location information, and for providing the mobile exchange with accounting information of facilities rate in response to a retrieval when the mobile exchange retrieves the user information in the database.

Mobile communication system

The quality and performance of the connectionless communications system are improved. When a BOM is received, the destination address DA of the L3-PDU stored in the payload of the BOM is retrieved, and the tag information is obtained from the DA (S,). The output message identifier MID is reserved (S,), and the tag information and output MID are assigned to the BOM (S,). Then, the tag information and output MID are written to the table. When a COM is received, the tag information and output MID are retrieved using the MID of the COM as a key, and the information is provided for the COM (S,and S,). When an EOM is received, the tag information and output MID are retrieved using the MID of the EOM as a key, and the information is provided for the EOM (S,and S,). Then, the output MID is released (S,).

Connectionless communications system, its test method, and intra-station control system

The ATM switch includes a switch network section, a common section and an individual interface section. The ATM switch system can reduce a cost by sharing the common section in both cases of employing a simplex and a duplex individual interface sections. The common section includes a demultiplexer, a user cell discarding section, a header convertor, a multiplexer, an individual interface section information receiver, and a controller. The individual information receiver identifies whether the individual interface section has a simplex or a duplex structure according to information sent from the individual interface section. The controller sets the condition of demultiplexing the cells in the demultiplexer, and sets the condition of discarding the user cells in the user cell discarding section.

ATM switch

Growing community of inventors

Fukuoka, Japan

Satoshi Esaka