Fujitsu Corporation

Yuji Nagano

Kazuyuki Inomoto

Shinichirou Miyajima

Kazuhiro Ichiyanagi

Akiko Kusumoto

Kiyohide Yamashita

Yuji Nomura

Hiroshi Ogura

Yuji Ishii

Takato Ohashi

Yuichi Terui

Naoyuki Takeshita

Michiko Mizoguchi

Kanna Okamura

Kazuyoshi Nagai

Toshikazu Senuki

Jun Endoh

Hisayoshi Naito

Katsuhiro Eguchi

Iwao Hashizume

Hirobumi Kawamura

Yoshimasa Watanabe

The base station apparatusstores apprise status data of certain data to each in-vehicle apparatus within a zone managed by the base station apparatus, transmits apprise status data stored in the status storage to other base station apparatuses, updates apprise status data stored in the status storage in accordance with a status of apprise to an in-vehicle apparatus within the zone managed by the base station apparatusand/or apprise status data received from another base station apparatus, individually transmits unapprised data to an in-vehicle apparatus by referring to apprise status data stored in the status storage, requests distribution of the data to the center apparatus when the base station apparatushas not received the data to be apprised, and upon receiving the data, transmits the data to an in-vehicle apparatus.

Base station apparatus, communication method, and computer readable storage medium storing program thereof

A wireless communication authentication program whereby a slave station in a small-scale wireless LAN system can be authenticated by a simple procedure. A wireless communication authentication device periodically increments a first system timer value (Step S) for which an optional numerical value is set beforehand. A wireless communication device sets therein a second system timer value (Step S) so as to coincide with the first system timer value and periodically increments the second system timer value (Step S). The wireless communication device transmits an authentication request command including a third system timer value (Step S), and the wireless communication authentication device compares the third system timer value included in the authentication request command with the first system timer value thereof assumed at the time of reception of the command (Step S). In accordance with the comparison result, the wireless communication authentication device determines whether to authenticate the wireless communication device.

Computer-readable recording medium recording a wireless communication authentication program

A mobile terminal is carried by a moving object, and the mobile station is configured to perform wireless communications with a base terminal from among a plurality of base stations. The mobile station acquires a communication status between itself and at least a first base station and a second base station from among the plurality of base stations. The mobile station performs wireless communications with a base station from among the first base station and the second base station of which the communication status satisfies a communication condition that is most distant.

Technology for controlling wireless communication

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

If a radio LAN apparatus moves from a communication range of a first access point to a communication range of a second access point, and if communication link between the radio LAN apparatus and the first access point is broken, a memory control section stops transmitting data to the first access point. At this time, data to be transmitted to the first access point are not deleted from memory. After the radio LAN apparatus enters the communication range of the second access point, the memory control section resumes transmission of the data stored in the memory. Thereafter, the next data are transmitted. Thus, the data is transmitted in proper sequence.

Radio LAN data transmission system, radio LAN data transmission method, and computer product

An image, which is captured by a camera that a worker, etc., carries, is once stored in a ring buffer memory for storing image signals. The image is extracted from the ring buffer memory, and a quasi-moving image is generated. In a normal state, the quasi-moving image is displayed on a monitor of a center such as a control room, etc. via codecs on transmitting and receiving sides. When a user viewing the monitor makes a request to view a sharp image of a particular frame, or the high-quality motion of a subject while viewing the frames preceding or succeeding a particular frame, the image frame or frames are read from the buffer memory for storing image signals, and displayed on the monitor.

Image on-demand transmitting device and a method thereof

Growing community of inventors

Fukuoka, Japan

Yuji Nagano