Fujitsu Corporation

Tetsuta Sakabe

Isamu Fukuda

Nobuyuki Fukuda

Kazuhiro Yasuno

Toshihiro Kobayashi

An encrypted communication device includes: a pattern generation unit configured to judge whether or not a security association including as matching data a data portion whose data pattern matches between data in a packet targeted for processing and data in a sample packet is to be generated; a key information exchange unit configured to transmit to an opposite device a key information exchange packet including the matching data and key data when the pattern generation unit judges that the security association is to be generated, and receives from the opposite device a key information exchange packet including a security association identifier of the security association, thereby establishing the security association with the opposite device; and a key information unit configured to store the matching data, the key data, and the security association identifier of the security association established by the key information exchange unit.

Encrypted communication device and method for performing encrypted communication while reducing traffic in communication system

A base station communicates with a mobile station consecutively transmitting a predetermined number of data for each predetermined time interval. The base station includes a measuring unit that using a predetermined threshold value, determines reception quality of the predetermined number of data that are consecutive and received from the mobile station; and a control unit that in response to a result of the measurement by the measuring unit, executes control to output any one among first notification information to cause the mobile station to transmit the same data, for the predetermined time interval and second notification information to cause the mobile station to transmit plural data that are different from one another, for the predetermined time interval.

Growing community of inventors

Yokohama, Japan

Tetsuta Sakabe