Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Takeshi Kokado

Moe Hamamoto

Tsutomu Tanaka

Yukiko Ito

Masaaki Tamai

Hiroshi Yokota

Shinzo Doi

Tomoyuki Karibe

Takashi Murakami

Hiroki Murakami

Yoshinori Okazaki

Manabu Yamamoto

Yibo Zhang

Hiroshi Kurata

Noriyuki Hidaka

Ikue Nakano

Satoshi Ito

A method of controlling a central air conditioning system includes, when a first air volume determined based on humidity in each of a plurality of rooms is less than a second air volume determined based on air quality in the room, causing a conveyor to convey air with a second air volume determined for a first room to the first room and convey air with a third air volume to a second room other than the first room, the third air volume being obtained by correcting the first air volume determined for the second room.

Air conditioning system and control method for the same

A communication terminal (L) includes the following functional units. A relay communication establishment unit () establishes communication paths via respective relay devices (toN,). A communication processing unit () performs communication for pieces of divided data via the relay devices. A communication state monitor unit () changes a current set of the relay devices to a new set of relay devices so as to be used for the communication, based on estimation results of communication states.

Communication terminal, communication method, and program

An intercom notifies a television connected via a network of an occurrence of an event. The intercom includes an event message generating unit that generates an event message indicating the occurrence of the event and including media information indicating media of event information that is obtainable by the television and that is associated with the event, and a communication unit that transmits the event message to the television via the network.

Communication apparatus and event processing method of the same

A communication device searches for a desired communication device and requests a service, without being conscious of the status of the power supply of other communication devices on a network, and achieves a reduction in power consumption. The communication device includes a main processing unit to process main service provided for other communication devices, a network processing unit to transmit and receive a request packet and a response packet among other communication devices, and an integrated power supply unit to stop supplying power to the main processing unit in a state of being able to supply it again and to supply the power to the network processing unit. The network processing unit is provided with an automatic responding unit to determine whether or not it can respond to the received request packet only by itself and, when the response is possible, to transmit the response packet to the communication device, and a power supply controlling unit, when the response is not possible, to control a main-power supply unit to supply the power to the main processing unit.

Communication device

A communication device includes: an address administration unit that manages data link layer addresses; and an ARP processing unit that processes an ARP protocol. The ARP processing unit includes an ARP receiving unit, an ARP transmitting unit, a duplication detecting unit, a duplication notification generating unit and an update GARP generating unit. The update GARP generating unit transmits a GARP and thereby updates the ARP tables of the communication devices on the same network, in order to solve a problem in which communication is interrupted.

Communication device provided with ARP function

A low cost communication apparatus enables detection of an apparatus present on a different network in a router multistage network having a plurality of routers. When a communication apparatus cannot detect, on a network thereof, a desired apparatus, the communication apparatus requests a connection support server securing communication paths with all the apparatuses on a home network, to relay an apparatus detection request. The connection support server transfers the request to relay the apparatus detection request, to an arbitrary apparatus belonging to a different network from the network to which the communication apparatus belongs, and the arbitrary apparatus, by proxy, performs an apparatus detection, and transfers information about a detected apparatus to the connection support server. By obtaining the information from the connection support server, the communication apparatus detects the apparatus on the different network.

Connection support server and communication apparatus

A communication apparatus which is capable of performing bi-directional communication via a router in a local network including one or more routers is provided. An upper segment determination section obtains address range information under an upper router which is connected on an external network side of a router to which the communication apparatus is connected. A terminal communication path holding section connects and holds a communication path to another communication apparatus in the local network. A message relay section relays a communication message from the other communication apparatus. When the terminal communication path holding section receives a first request message requesting to establish a communication path from the other communication apparatus, the terminal communication path holding section stores source address information of the received first request message, and transmit a response message to the stored source address information to establish a communication path to the other communication apparatus.

Communication apparatus, method executed by communication apparatus, and storage medium storing software for executing method

The present invention improves the reliability and safety of communication in a communications system wherein communication is relayed. When an on-premise terminalsets relay information, such as NAT information or the setting information of a packet filter, in a gateway, the relay information is set after confirming whether the NAT information for which a setting attempt is being made duplicates the NAT information of another on-premise terminal. The same applies to the case of deleting relay information. If the NAT information is duplicate, then interference with the communication of the other on-premise terminalis prevented by modifying the relay information for which a setting attempt is being made, specifically the port number of the gatewayon a global network

Relay information setting method and device

A communication device, a communication system and an authentication system for preventing a disguising act by an illegal man-in-the-middle and improving the safety and certainty of authentication processing are provided. A slave () transmits an authentication request including device information to a master (). The master () receives the authentication request and displays the device information included in the authentication request on a screen of a display section (). The user visually checks the device information displayed on the screen of the display section(), determines whether or not to verify the authentication, and instructs the master () of the determination result via an input section (). The master (), instructed to verify or not to verify the authentication, transmits a response in accordance with the instruction to the slave ().

Communication device, communication system and authentication method

Provided is a communication terminal capable of establishing a P2P communication path with a communication terminal connected to a different private network. A communication terminal () transmits and receives messages to and from a server () via a router (), thereby examining a relay characteristic of the router (). When the examined relay characteristic of the router () is Port Reuse, the communication terminal () determines address information, which contains at least a port number of the communication terminal (), which port number is to be used for P2P communication with a communication terminal (), to be address information about the router. The communication terminal () exchanges the determined address information about the router () with the communication terminal (). Based on the exchanged address information, the communication terminal () establishes a P2P communication path with a communication terminal ().

Communication terminal, and communication method

The NAT type of a router can be examined by communicating with one server having one IP address, and a P2P communication path is established efficiently using the NAT type obtained by the examination. A terminaltransmits a plurality of port number examination request packets having a plurality of port numbers of a serverset as the destination port. The terminalrefers to a port number examination response packet received from the serverto acquire a plurality of port numbers obtained by address translation by a routerfor the port number examination request packets respectively. The terminaldetermines the NAT type of the routerbased on the acquired translated port numbers. The terminalsandestablish a P2P communication path efficiently using the determined NAT type.

Communication apparatus, communication system and communication method

A communication apparatus includes a global address information acquiring section for acquiring first global address information, a WAN-side address information acquiring section for acquiring first WAN-side address information, and a local address information acquiring section for acquiring first local address information. Moreover, the apparatus includes an address information notification section for notifying the first global address information, the first WAN-side address information, and the first local address information to a communication partner apparatus. Furthermore, the apparatus includes an address information acquiring section for acquiring second global address information, a second WAN-side address information, and a second local address information assigned to the communication partner apparatus. The communication apparatus determines a method by which P2P connection can be established based on the first and second global address information, the first and second WAN-side address information, and the first and second local address information.

Communication apparatus, method and program for realizing P2P communication

A system interrelating a program to be broadcast with a CM stored on a networkis implemented. The CMs (second contents) stored on the networkare each assigned a URL, while the program (first content) to be broadcast is embedded with tag information, which is used to specify the URL of the CM to be interrelated with the program for reproduction and output. Based on the tag information embedded in the received program, a TV commerce terminalspecifies any one URL and then fetches the CM having the URL assigned.

Content providing system and terminal used therein

A content server transmits content data designated by a content reservation request from a DTE onto a first or a second communications circuit for storage into a DCE connected to the DTE. The content reservation request indicates a time limit in which the designated content data is to be ready in the DCE. The content server manages the designated time limit, and performs scheduling processing. During the processing, based on both the managed time limit and predetermined communications information, a transmission timing is determined which ensures that the content data is completely transmitted by the time limit, and which communications circuit is optimal. The content server transmits the content data onto the determined optimal communications circuit within the determined transmission timing. Accordingly, the data transmission system can achieve an efficient use of a communications circuit in terms of transmission bandwidth, and download data from a server at a lesser expense.

Data transmission system

Data blocks and redundant data are distributed across disk drives. In response to a first read request transmitted from a host device, a controller issues second read requests to read the data blocks and the redundant data from the disk drives. Further, the controller detects the disk drive which is no longer required to read the data block or redundant data from among the disk drives, and issues a read termination command to the detected disk drive to terminate reading therefrom. In a disk array device with such structure, even reading of one parity data with much time required does not affect other reading.

Growing community of inventors

Kyoto, Japan

Takeshi Kokado