Fujitsu Corporation

Kanna Okamura

Hiroki Tamura

Koichiro Nakayama

Yuji Nomura

Toshiyuki Sakai

Koji Matsunaga

Hiroshi Ogura

Takato Ohashi

Toshinori Koyanagi

Kazuhiro Uchida

Katsuhiko Hirashima

Kiyohide Yamashita

Setsuo Abiru

Junichi Sawada

Yuji Nagano

Shinji Takao

Hidetoshi Amari

Kazuya Ryu

Shinichi Fujiyoshi

Kazuyoshi Nagai

Masashi Shibata

Kenichi Ishikawa

A network system is composed of a plurality of information processing apparatuses connected to a ring network, and a program, which is to be executed by sharing the resources of the information processing apparatuses, is divided into predetermined units and stored in a plurality of information processing apparatuses, where an information processing apparatus determines whether all pieces of the divided program have been stored in the memory; when there is a program which has not been stored, transmits to another information processing apparatus a transmission request for the program; determines whether a program received by a communication section is the program transmitted from another information processing apparatus in response to the transmission request; stores the received program in the memory when it is transmitted in response to the transmission request; and executes the program stored in the memory when all pieces of the divided program have been stored.

Network system and information processing method

A wireless repeater on a communication line has a structure that includes a plurality of wireless communication media, and a band control unit that changes the first bandwidth of the communications line according to increase and decrease in the number of wireless communication media by an operation dividing the first bandwidth of the communications line into a plurality of second bandwidths and an operation multiplexing a plurality of second bandwidths adjusting to the first bandwidth, responding to the number of the wireless communication media.

Wireless repeater, the method for wireless repeating, and data communications system

A traffic management system manages, distributes, and controls various traveling states of vehicles at a high quality level. A vehicle-mounted unit performs an interconnection process for user authentication when entering a predetermined radio-wave zone. A radio unit disposed on a road sends interconnection process completion information to a center device when the interconnection process for connection to the vehicle is completed. If the vehicle does not connect to the radio unit after elapsed of a predicted time at which the vehicle is expected to travel across the radio unit, then the radio unit sends an overtime to the center device. The interconnection process completion information is received, the center device calculates a predicted time at which the vehicle is expected to pass across a radio unit, and sends the predicted time to the radio unit. When the overtime is received, the center device determines whether a fault has occurred or not. When it is judged that the fault has occurred, the center device sends alarm information to vehicles traveling near a site where the fault has occurred on the vehicle.

Traffic management system

An optical line terminal which sends and receives messages or data to/from optical network units (ONUs) connected thereto. A cyclic message monitor produces a trigger signal, for use in a PLOAM grant generator, at certain intervals in harmonization with upstream messages that a specific optical network unit regularly transmits. A downstream message monitor watches outgoing downstream messages to detect a certain message requesting an ONU to return a response, and it triggers the PLOAM grant generator if such a message is detected. An upstream message monitor detects an upstream message whose identification code indicates that the sending ONU has no information to return. If such an upstream message is found, it limits the issuance of PLOAM grants to that optical network unit. The PLOAM grant generator produces PLOAM grants which permit ONUs to transmit their messages, and sends them out through a PLOAM cell transmitter.

Optical line terminal

Growing community of inventors

Fukuoka, Japan

Kanna Okamura