Fujitsu Corporation

Akihiro Kameda

Isamu Fukuda

Nobuyuki Fukuda

Kenji Fukuda

Kazuyuki Minohara

Kazuhiro Yasuno

Shigeaki Kawamata

Kiyohisa Hoshino

Toshifumi Inoue

Jun Roppongi

Katsuhiko Negoto

Atsushi Morohashi

A communication apparatus performs encryption on data transmitted from another communication apparatus by using first or second cryptographic algorithm, or performs decryption on the data that has been encrypted using the first or second cryptographic algorithm, by using one of the first and second cryptographic algorithms used for the encryption, where the second cryptographic algorithm provides a higher security level than the first cryptographic algorithm. The communication apparatus includes an encryption unit configured to perform, upon receiving the data including a cryptographic class identifying a parameter to be used for performing the encryption or the decryption, the encryption or the decryption by using one of the first and second cryptographic algorithms, based on the cryptographic class.

Apparatus and method for performing different cryptographic algorithms in a communication system

A wireless base station apparatus includes a determination unit configured to make a determination as to whether an amount of power in the terminal device is to be reduced, and a control information transmission unit configured to transmit control information indicating power control to the terminal device, based on a determination result of the determination unit, and a terminal device includes at least one outlet unit configured to be able to supply power to an external device, a measurement unit configured to acquire the measurement value by measuring power in the terminal device, a measurement information transmission unit configured to transmit the measurement information indicating the measurement value to the wireless base station apparatus, a control information reception unit configured to receive the control information from the wireless base station apparatus, and a power supply control unit configured to control supply of power, based on the received control information.

Method of controlling power in a wireless communication system

A packet is transmitted from a transmitting device to an active communication device which transmits a reception history identifying the received packets to the transmitting device. The transmitting device transmits an active-mode request message to a standby communication device when having failed to receive the reception history from the active communication device within a predetermined time period. Then, the standby communication device becomes a new active communication device, and the active communication device becomes an old active communication device. The new active communication device transmits to the transmitting device a switching request message for switching a destination of the packet from the old active communication device to the new active communication device. The transmitting device retransmits packets that have been transmitted from the transmitting device to the old active communication device and have failed to be received by the old active communication device, to the new active communication device.

Apparatus and method for switching between redundant communication devices

Growing community of inventors

Kawasaki, Japan

Akihiro Kameda