Fujitsu Corporation

Masaaki Nagasaka

Takashi Kaneko

Tadaaki Tanaka

Keita Kobayashi

Takashi Ueno

Kazutoshi Kobayashi

Shouichi Kimura

Norishige Ichihashi

Hironobu Oshika

Tadahiro Ohta

The present invention relates to a communication system, and the invention specifically provides a contents server that appropriately stores media contents from group users in a PoC Service and a conference service. The contents server includes: a recording unit that records media information from plural users in a communicatable state participating in a predetermined group, for each group; a detecting unit that detects a communicatable state or an uncommunicatable state of each participating user, at each predetermined time; and a deleting unit that deletes confirmed media information already recorded in the recording unit, upon detecting that all the participating users are in the communicatable state.

Contents server and contents server system

It is determined whether a call-connection condition set to a call-connection device is a first call-connection state or a second call-connection state. When the determination result shows that the first call-connection state is set, a call is connected from an originating terminal to a destination terminal. When the determination result shows that the second call-connection state is set, the call is connected from the originating terminal to the destination terminal and conversation-termination processing is performed without waiting for a disconnection request transmitted from the originating terminal or the destination terminal.

Telephone-line-connection method

The present invention relates to a portable wireless terminal, and in particular, a portable wireless terminal such as a cellular phone, etc., and its security system that can reliably prevent, by remote control, improper use of the portable wireless terminal by a third party when it is lost or stolen. The portable wireless terminal that uploads backup data to a center by remote control from the center via a wireless network includes: a data access control section-that, in response to an instructions from the center, prohibits access to the backup data retained by a portable wireless terminal or deletes the backup data; an encryption section-that encrypts the backup data by using a public key notified from the center or a public key owned by the portable wireless terminal itself in response to instructions from the center; and a data transmission section-to-that transmits the backup data split into a plurality of data fragments on a plurality of communication paths to the center according to transmission priority of the backup data that is notified from the center or owned by the portable wireless terminal itself.

Portable wireless terminal and its security system

Growing community of inventors

Kawasaki, Japan

Masaaki Nagasaka