Fujitsu Corporation

Nobuko Kimura

Takashi Onodera

Noriyuki Yokoshi

Ken Takebayashi

A communication system is installed in information home appliances controlled by an operation system connected to an IP network. The communication system includes a first communication apparatus connected to the IP network; and a second communication apparatus connected to the first communication apparatus. The first communication apparatus includes a determining unit for determining, based on an attribute included in a search signal transmitted from the second communication apparatus in order to search for the first communication apparatus, whether the first communication apparatus can control the second communication apparatus; a search-signal response signal generating unit for generating and transmitting, to the second communication apparatus, a response signal in response to the search signal in the case the determination of the determining unit is affirmative; and a registering unit for registering the second communication apparatus as a control target based on a connection request made by the second communication apparatus.

Communication apparatus and communication apparatus control method

A protocol conversion system that provides improved reliability in data transmission and reception. The system comprises a first node belonging to a network A, a second node belonging to another network B, and a protocol converter disposed between the two nodes. The first node uses a first communications protocol that defines a set of rules for communications in the network A, while the second node uses a second communications protocol for the network B. Serving as a relaying device between the first node and second node, the protocol converter converts the communications protocol of the messages traveling between them. The protocol converter comprises a first message processor to process the messages according to layer definitions of the first communications protocol, a second message processor to process the messages according to layer definitions of the second communications protocol, and a first protocol converter that adds and removes some control information to/from the messages for protocol conversion. The second node comprises a second protocol converter working as a counterpart of the first protocol converter.

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Kawasaki, Japan

Nobuko Kimura