Abstract: An information communication system for exchanging a plurality of contents between a plurality of node devices, includes a plurality of internal networks connected to an external network. The internal networks include: the plurality of node devices connecting the same internal network; and a support device, which connects the internal networks, and which supports acquisition of contents by the node devices. An overlay network allows for exchanging of contents between the node devices and the support devices. The node devices include a first acquisition unit that acquires contents by selecting a first device group in preference to a second device group. The first device group includes: a support device and a node device connecting the internal network of an access destination that is a contents acquisition destination. The second device group includes a support device and a node device that do not connect the internal network of the access destination.

Abstract: An information communication system has features that efficient transmission of information to plural node devices can be carried out without a managing server, etc. and efficient collection of responses from the node devices can be carried out while suppressing loads imposed on a network. The information communication system has a means for receiving an information collection message from other node devices to the group, a means for transmitting an information collection message to one of the node devices in each of the groups when the group is further divided into plural groups, a means for receiving reply messages including response information, a means for generating new response information based on the response information in the reply message and its own response information, and a means for sending reply messages including the new response information to the other node devices.

Abstract: There is provided a network control device capable of surely distributing a content even when a relay function of one of the nodes contained in a network stops, without affecting the process in nodes below the node and while improving the re-liability of the network system itself. When controlling a node contained in a network system including a server and a plurality of nodes constituting a plurality of hierarchies and connected to one another, wherein a content is distributed from the server to the respective nodes, it is checked whether a content relay function in a node located at the uplink with respect to the node in the content distribution has stopped. When the stop of the relay function is detected, control is performed so that the consumption speed of the content accumulated in the lower node in the process executed in the node is smaller than the consumption speed before the relay function has stopped.

Abstract: An information communication system for exchanging a plurality of contents between a plurality of node devices, includes a plurality of internal networks connected to an external network. The internal networks include: node devices that connects the same internal network; and a support device, which connects the internal network, and which supports acquisition of contents by the node devices. An internal overlay network is constructed for each of the internal networks. An external overlay network is constructed on the external network. Each of the node devices includes a first acquisition unit that acquires contents from a first internal overlay network, which is an access destination of the first acquisition unit. If it is unable to acquire the contents from the first internal overlay network, the first acquisition unit acquires contents from one of the support devices through a first support device, which is a support device connecting the first internal network.

Abstract: A first node device transmits to a second node device unique identification information corresponding to specific common information, receives from the information saving node device the relevant information regarding the information saving node device, and requests to a selected information saving node device delivery of the specific common information, the second node device searches the node information and, in a case where there is node information, transfers the identification information to the information saving node device, which is indicated by node information, and the information saving node device, in a case where the transmission of the specific common information indicated by the identification information is available, transmits to the first node device the relevant information regarding the information saving node device, and, in a case where delivery request for the specific common information is received from the first node device, delivers specific common information.

Abstract: The present invention provides a distribution system in which even in the case where the content distributability varies among content holders, desired content can be promptly and efficiently received by a requester. To index information recorded in a root node or cache node so that it can be referred to from the requester, in addition to content ID and IP address of a content holder, easiness information indicative of easiness of distribution of content from the content holder are added. When the requester determines a content holder as a distribution source, a content holder having high distributability is preferentially selected with reference to the easiness information and content is distributed from the selected content holder.

Abstract: A radio-frequency tag communication device permitting a radio-frequency tag communication system to have a sufficiently large area of communication, with a minimum required number of interrogators. The radio-frequency tag communication device includes a transmission control portion operable to control transmission of a transmitted signal, so as to prevent overlapping an area of communication of the radio-frequency tag communication device and an area of communication of another radio-frequency tag communication device, making it possible to maximize a spacing distance between the adjacent radio-frequency tag communication devices, and to effectively prevent concurrent receptions of the transmitted signals by the plurality of radio-frequency tags. Namely, the radio-frequency tag communication device permits the radio-frequency tag communication system to have a sufficiently large area of communication with a minimum required number of interrogators.

Abstract: An RFID-tag communication device including (a) an antenna from which a transmission signal is transmitted toward an RFID tag and through which a reply signal transmitted from the RFID tag in response to the transmission signal is received, for radio communication with the RFID tag, (b) a first-cancel-signal output portion operable to generate a digital first cancel signal for suppressing a leakage signal from a received signal which is received through the antenna and which contains the leakage signal as well as the rely signal, the leakage signal being a part of the transmission signal which is transmitted from the antenna and which is returned to and received by the antenna, (c) a first-cancel-signal control portion operable to control an amplitude and/or a phase of the first cancel signal generated by the first-cancel-signal output portion, (d) a first-cancel-signal D/A converting portion operable to convert the first cancel signal generated by the first-cancel-signal output portion, into an analog signal,

Abstract: A tree type network system including an information delivery device, a plurality of node devices, and an administration, wherein the node devices are connected in a tree-like shape via a communication route while placing the information delivery device in an uppermost level and forming a plurality of hierarchy levels, and the delivery information is sequentially transferred from the node device in an upper hierarchy level to the node devices in lower hierarchy levels, wherein the administration device includes: a device for acquiring attribute information of a node device, which transmits participation request information, and determines device information on the basis of the attribute information thus acquired upon receipt of participation request information of requesting device information of node device as connection candidate, and a device for transmitting the connection end candidate information thus determined to the node device which transmits the participation request information.

Abstract: The present invention is to provide a node device, a shared information update processing program, a shared information update means, and an information sharing system, which can quickly and assuredly update the shared information in each of the node devices without applying an excessive load to a specific apparatus such as a server. According to the present invention, there is provided a plurality of node devices mutually connectable through a network, each of the node devices saving shared information, used in common with the nodes, and in a case where each of the node devices transmits predetermined data to the node device, being a connection counterpart, the node device describing version information indicative of a version of the shared information, saved by the own node device, including: a data receiving means; a version judgment means; and a shared information update means.

Abstract: A node device which participates in an overlay network formed by participation of all or part of a plurality of node devices which are connected to each other via a communication device. The node device includes a search information transmission device, a reply information receiving device, a communication load information device, a communication load comparison device, a node selection device and a participation request information transmission device. The search information transmission device transmits search information to search a node device transmitted to an information processing device connected to the communication device. The receiving device receives information replied from the plurality of node devices. The comparison device compares information regarding communication load in each of the communication routes. The selection device selects a node device on the basis of comparison result by the comparison device.

Abstract: An information communication system for exchanging a plurality of contents between a plurality of node devices, includes a plurality of internal networks connected to an external network. The internal networks include: the plurality of node devices connecting the same internal network; and a support device, which connects the internal networks, and which supports acquisition of contents by the node devices. An overlay network allows for exchanging of contents between the node devices and the support devices. The node devices include a first acquisition unit that acquires contents by selecting a first device group in preference to a second device group. The first device group includes: a support device and a node device connecting the internal network of an access destination that is a contents acquisition destination. The second device group includes a support device and a node device that do not connect the internal network of the access destination.

Abstract: An information communication system for exchanging a plurality of contents between a plurality of node devices, includes a plurality of internal networks connected to an external network. The internal networks include: node devices that connects the same internal network; and a support device, which connects the internal network, and which supports acquisition of contents by the node devices. An internal overlay network is constructed for each of the internal networks. An external overlay network is constructed on the external network. Each of the node devices includes a first acquisition unit that acquires contents from a first internal overlay network, which is an access destination of the first acquisition unit. If it is unable to acquire the contents from the first internal overlay network, the first acquisition unit acquires contents from one of the support devices through a first support device, which is a support device connecting the first internal network.

Abstract: An information delivery system or the like which autonomously distribute and arrange contents as many as a number necessary inside the delivery system at appropriate positions inside the delivery system without providing a server or the like which administrates ubiety and number of the contents. There is provided an information delivery system having a plurality of information processing apparatuses which can mutually communicate through a network and a registration apparatus which holds at least one or more common information pieces so as to be used in common with the plurality of information processing apparatuses.

Abstract: In a first node in a system having nodes connected to each other as a network, request information including identification information and request number of location information indicating a location in the network of information saving nodes is transmitted to a second node. In the second node, the location information and identification information are saved. At least the location information whose number corresponds to the request number is transmitted to the first node when the number of the saved location information meets the request number. Otherwise, the location information whose number corresponds to the number of the saved location information is transmitted to the first node. The received request information is transferred when the second node itself is not a management node, to a node interposed between the second node and the management node, or to the management node when there is no node therebetween.

Abstract: A node device to participate in an overlay network formed by all or a part of a plurality of node devices, mutually connected through a communication network, including: a device information acquisition means for acquiring device information of node devices to which participation request information is to be transmitted; a reachable range setting means for setting up the participation request information, transmitted on the communication network; a participation request information transmission means for adding reachable range to the participation request information and transmitting it to each of the node devices specified by the device information acquired; a reply information receiving means for receiving reply information, transmitted from a node device, and including a transfer destination table for the overlay network; and a transfer destination table generation means for generating the own node device on the basis of the transfer destination table included in the reply information received.

Abstract: A connection state control device is provided that can promptly perform a reproducing operation by smoothly switching channels at each node and reduce the load on the management server in a case where operations are performed so as to sequentially change distribution information to be received at each node in a network system having a tree structure. A node receives content being distributed over a network, and performs an operation of reproducing the received content. When the node is to receive different content being distributed over a different network, the node is connected to the different network. After that, the node receives and reproduces the different content. The node continues to receive the original content but suspends the operation of reproducing the original content after connected to the different network.

Abstract: The apparatus includes effective bandwidth information obtaining means for obtaining effective bandwidth information indicative of an effective bandwidth of each of the communication paths attached to the receiving devices so that each of the receiving devices is connected to the receiving device or the distributing device at the higher hierarchical level; effective bandwidth comparing means for comparing the effective bandwidths of the communication paths; and connection mode setting means for setting a mode of connection among the devices on the basis of a result of comparison of the effective bandwidth comparing means.

Abstract: It is the object of the present invention to provide a processing apparatus, a tree-type network system, processing program and recording method that are capable of performing requests to a higher-order apparatus at the same time, while reducing the load that is concentrated in the communication path upstream in the network. One node apparatus which is provided with tree-type network system including broadcasting apparatus sending inquiry information as request-reception-begin data etc. for requesting sending response message as select-node information etc.

Abstract: A radio-frequency identification tag communication device including a BFA weight-value setting portion operable to control a directivity of a transmitter antenna, and an adaptive processing portion operable to implement an adaptive control of a weight to be given to a received signal received by each of a plurality of antenna elements, on the basis of a reply signal transmitted from a radio-frequency identification tag, so that the directivity of the transmitter antenna is changed to a direction in which the frequency identification tag in question is expected to exist, and the weight to be given to each received signal is subjected to the adaptive control, whereby the sensitivity of communication of the communication device with the radio-frequency identification tag is improved.