Abstract: According to the embodiments, a communication apparatus stores therein an operation mode indicating whether the communication apparatus is a publisher or a subscriber, and includes a message processing unit that generates a transmission message and analyzes a reception message and a nonvolatile memory. When the communication apparatus is subscriber, the communication apparatus sends a repair message to request a retransmission of a data chunk not successively received. When the communication apparatus is publisher, the communication apparatus selectively retransmits the data chunk based on the repair message.

Abstract: A mode of a publisher or a subscriber is stored. Also, a first identifier indicating affiliation to a first group is stored. In a case of the publisher, a transmission message including ToC information, which is a list of the first identifiers and data to be transmitted, is transmitted to an outside. In a case of the subscriber, when a received message includes the first identifier, data included in the message is stored into a non-volatile memory, and when it is determined that all data in the ToC information stored in the received message are already received and that the number of publishers is less than a threshold, the stored mode is changed to the publisher.

Abstract: According to one embodiment, a communication device includes a first circuitry, a second circuitry and a third circuitry. The first circuitry establishes a wireless connection with a first communication device, in accordance with a communication request relating to data communication. The second circuitry measures a communication environment of the communication device to acquire communication environment data. The third circuitry establishes a logical connection with a second communication device relating to the communication request via the wireless connection and controls so as to perform the data communication with the second communication device in accordance with the communication environment data.

Abstract: According to one embodiment, a storage unit, a management unit that acquires attributes of communication apparatuses from a plurality of the communication apparatuses and stores identifiers of the communication apparatuses and the attributes in the storage unit in association with each other as communication apparatus information, and a selection unit that selects a distributor apparatus that is the communication apparatus distributing a content to the other communication apparatuses as a radio signal based on the communication apparatus information are included.

Abstract: According to the embodiments, when a communication apparatus is a publisher, a transmission message including a first identifier is transmitted using first transmission power, when the communication apparatus is a subscriber, data of a reception message including the first identifier is stored in a nonvolatile memory, when at least a part of the reception message cannot be received, a repair message for requesting retransmission of the reception message is transmitted from a wireless interface unit using second transmission power, and when there is no response, a repair message is transmitted using third transmission power that is larger than the second transmission power.

Abstract: According to one embodiment, a communication apparatus includes an operation mode storage unit configured to store whether the communication apparatus is in a mode to operate as a radio base station or a mode to operate as a terminal, and a non-volatile memory. In a case of the radio base station, a message to be transmitted is output to the outside. In a case of the terminal, data included in a received message is stored in the non-volatile memory. In a case of operating as the radio base station, the operation mode is changed from the terminal to the radio base station when communication quality with an external first radio base station is less than a predetermined value and a message from a radio base station other than the first radio base station is not received after all the data transmitted by the first radio base station have been received.

Abstract: A mode of a publisher or a subscriber is stored. Also, a first identifier indicating affiliation to a first group is stored. In a case of the publisher, a transmission message including ToC information, which is a list of the first identifiers and data to be transmitted, is transmitted to an outside. In a case of the subscriber, when a received message includes the first identifier, data included in the message is stored into a non-volatile memory, and when it is determined that all data in the ToC information stored in the received message are already received and that the number of publishers is less than a threshold, the stored mode is changed to the publisher.

Abstract: According to the embodiments, a communication apparatus stores therein an operation mode indicating whether the communication apparatus is a publisher or a subscriber, and includes a message processing unit that generates a transmission message and analyzes a reception message and a nonvolatile memory. When the communication apparatus is subscriber, the communication apparatus sends a repair message to request a retransmission of a data chunk not successively received. When the communication apparatus is publisher, the communication apparatus selectively retransmits the data chunk based on the repair message.

Abstract: According to the embodiments, when a communication apparatus is a publisher, a transmission message including a first identifier is transmitted using first transmission power, when the communication apparatus is a subscriber, data of a reception message including the first identifier is stored in a nonvolatile memory, when at least a part of the reception message cannot be received, a repair message for requesting retransmission of the reception message is transmitted from a wireless interface unit using second transmission power, and when there is no response, a repair message is transmitted using third transmission power that is larger than the second transmission power.

Abstract: An equipment set generation support apparatus (a) acquires, from a plurality of equipments connected to a network, state change event information notifying a state change of each equipment and an occurrence time and date of the state change, (b) sets a detection condition including a start time and an end time of a detection period, (c) selects state change event information whose occurrence time and date of the state change falling within the detection period from the state change event information acquired, and (d) detects, from the plurality of equipments, a set of equipments whose states change in the detection period and a set of state values after the state change of each equipment based on the state change event information selected.

Abstract: A control system includes a control device for controlling a plurality of actuators by executing a plurality of functions based sensor values from a plurality of external sensors and a function providing device for providing the control device with the functions to be executed by the control device. The function providing device accepts a program including a plurality of functions from a user device, finds a new function among the functions which has not been received yet and pass the same function to the control device. The control device executes functions passed from the function providing device based on values of the external sensors and controls the actuators by transmitting values of output arguments of the functions to the actuators.

Abstract: According to an embodiment, a communication system includes a first relay device located outside of a firewall; and a second relay device located within the firewall. The first relay device includes a first receiving unit to receive a request for acquiring information on an information processing device within the firewall from a communication device and receive the information acquired from the information processing device from the second relay device; and a first transmitting unit to transmit the acquisition request to the second relay device and transmit the information received from the second relay device to the communication device. The second relay device includes a second receiving unit to receive the acquisition request; an acquiring unit to acquire information requested by the acquisition request from the information processing device; and a second transmitting unit to transmit the acquired information to the first relay device.

Abstract: A relay device is provided that includes a reception unit and a transmission unit. The reception unit receives a startup packet including a magic packet, a MAC address of controllable equipment, and a first ID for starting up the controllable equipment. The transmission unit transmits a first electric signal indicating the first ID to all link-downed Ethernet ports.

Abstract: A control network system connected with a node having a unique identifier includes a KDC4B for distributing a first key to the node for cryptographic communication, a PS4B for supplying a function name and a second key corresponding to the unique identifier to the node by the cryptographic communication using the first key, and a PS for supplying the node with setting information used for the cryptographic communication using the second key in response to a request using the function name.

Abstract: According to an embodiment, an information-processing device is coupled to an external device and a server. The information-processing device includes a device key storage configured to store a device key; and an MKB processor configured to generate a media key from the device key and a media key block. The information-processing device also includes a shared key generator configured to generate a shared key from the media key and secret information transmitted from the server. The shared key is shared by the information-processing device and the external device.

Abstract: When handover is performed from a first network to a second network, a home agent transmits a reply request message to a terminal through the first network after new configuration of a tunnel for transmitting and receiving a packet through the second network. If the home agent receives a reply message corresponding to the reply request message through the first network, the home agent detects that the configuration of the tunnel for transmitting and receiving the packet through the first network can be deleted, and deletes the configuration of the tunnel.

Abstract: An apparatus communicating with a gateway apparatus on a control system network for facility equipment, via an information system network, includes a unit which stores not less than one piece of virtual point information defining a virtual point combined with not less than one piece of facility equipment, a user authentication unit which performs user authentication for a user associated with a client, a unit which receives a request for control on one virtual point from the client, a unit which creates a remote control command for the facility equipment associated with the request based on the virtual point information when the request has been received and the user authentication has succeeded, and a unit which transmit the remote control command to the gateway via the information system network when tenant authentication for a tenant associated with the agent apparatus which is performed by the gateway has succeeded.

Abstract: When handover is performed from a first network to a second network, a terminal transmits a reply request message to a home agent through the first network after new configuration of a tunnel for transmitting and receiving a packet through the second network. If the terminal receives a reply message corresponding to the reply request message through the first network, the terminal detects that the configuration of the tunnel for transmitting and receiving the packet through the first network can be deleted, and deletes the configuration of the tunnel.

Abstract: An equipment set generation support apparatus (a) acquires, from a plurality of equipments connected to a network, state change event information notifying a state change of each equipment and an occurrence time and date of the state change, (b) sets a detection condition including a start time and an end time of a detection period, (c) selects state change event information whose occurrence time and date of the state change falling within the detection period from the state change event information acquired, and (d) detects, from the plurality of equipments, a set of equipments whose states change in the detection period and a set of state values after the state change of each equipment based on the state change event information selected.

Abstract: An equipment set generation support apparatus (a) acquires, from a plurality of equipments connected to a network, state change event information notifying a state change of each equipment and an occurrence time and date of the state change, (b) sets a detection condition including a start time and an end time of a detection period, (c) selects state change event information whose occurrence time and date of the state change falling within the detection period from the state change event information acquired, and (d) detects, from the plurality of equipments, a set of equipments whose states change in the detection period and a set of state values after the state change of each equipment based on the state change event information selected.