Abstract: Provided are an information transmission device and method thereof allowing a wireless device intended to newly start an operation in a white space to efficiently perform its preparatory operation, the transmission device including: a first retainer retaining first information including at least a list of channels available in each of first-type partial areas obtained when dividing an area at a first fineness; a second retainer retaining second information including at least a list of channels available in each of second-type partial areas obtained when dividing the area at a second fineness finer than the first fineness; a generator generating multiplexed information including the first and the second information so that the first and the second information are repeated at equal frequencies, or the first information is repeated at a frequency higher than that of the second information in the time axis direction; and a transmitter wirelessly transmitting the multiplexed information.

Abstract: A technique that can effectively utilize unused wireless link and realize high-quality wireless communication between a communication terminal and a base station and enables efficient distribution of radio resources over an entire wireless communication system is provided. A wireless communication system in which a base station and a communication terminal can conduct wireless communication by detecting a usable wireless link and changing a wireless link used for the connection is also provided. On the communication network side, in addition to a plurality of wireless communication networks and a base station, a server device is provided.

Abstract: Object: To provide a mechanism and a function of a system that can determine a communication method and the like effectively utilizing frequency resources, considering priority of each communication, in a cognitive communication network system of a frequency shared type or the like assuming that a given frequency band is shared by a plurality of systems in use.

Abstract: Provided are an information transmission device and method thereof allowing a wireless device intended to newly start an operation in a white space to efficiently perform its preparatory operation, the transmission device including: a first retainer retaining first information including at least a list of channels available in each of first-type partial areas obtained when dividing an area at a first fineness; a second retainer retaining second information including at least a list of channels available in each of second-type partial areas obtained when dividing the area at a second fineness finer than the first fineness; a generator generating multiplexed information including the first and the second information so that the first and the second information are repeated at equal frequencies, or the first information is repeated at a frequency higher than that of the second information in the time axis direction; and a transmitter wirelessly transmitting the multiplexed information.

Abstract: Embodiments of the invention enable a large number of wireless communication networks to be efficiently used while the size of a device operated by a user is reduced and power is saved by providing a communication terminal whose connection with different wireless communication networks can be dynamically reconfigured. A communication terminal whose connection with a plurality of wireless communication networks can be dynamically reconfigured is provided with a data communication aggregation device, a communication application executing device, and a local communication path therebetween. The data communication aggregation device interfaces with the plurality of wireless communication networks and communicates with the communication application executing device through the local communication path. The communication application executing device executes an application for communicating with an outside communication network.

Abstract: The present invention provides a technique capable of processing to automatically and optimally select types of external networks and a communication system, and at the same time, capable of switching network selection upon a user's arbitrary opportunity. A communication connection device 1 is provided with: a network communication adaptor 13 connecting a terminal device 4; external network communication adaptors 11, 12 compatible with external networks; a network selection processing portion 102 automatically selecting a network from the external networks according to profile information 141 previously including at least one of types of networks and a communication system; re-selection processing instruction mechanisms 15, 103 designed to cause, as a result of a user's operation, the network selection processing portion 102 to start selection processing.

Abstract: The present invention provides a user-carriable mobile communication relay device that relays communication between an internal network and an external network, in which even when the device is moved, the device dynamically selects and connects the external network depending on a surrounding radio wave environment or a communication content.

Abstract: To reduce power consumption for scanning and maintain communication quality by reducing the time for scanning or connection when a wireless communication terminal switches between networks or base stations. A wireless communication terminal 1 enabling connection with a plurality of base stations disposed in different positions which includes a base station scanning unit 100 detecting and scanning a base station capable of communication at the current position of the wireless communication terminal, a simultaneous detection base station recording unit 101 recording simultaneously detected base stations as simultaneous detection information in a storage unit, a connection candidate extraction unit 102 and a first communication unit 103 performing communication by connection with the extracted connection candidate base station.

Abstract: To provide a method of selecting an optimal base station for each application when accumulating communication quality in response to an application type for a base station and a communication terminal switches base stations. A communication quality database 31 is prepared by assigning a current location of a communication terminal device, a currently running application program and a communication quality when executing an application program. When making a new connection with a base station, the current application and location is used to select a base station having an optimal communication quality from the communication quality database 31. This mechanism may be provided in the communication terminal device or may be provided as a communication system including a server device.

Abstract: A name system and method in a communication network, includes a technique for implementing naming in which security is ensured in an Internet environment and a personal network in which a user can access his own device or data.

Abstract: The present invention is a wireless communications system for simultaneously establishing a basic access network and a wireless access network using at least two kinds of wireless communication networks. The basic access network executes signaling communication in which communication is controlled so as to be continuously switched, whereas the wireless access network executes data communications other than the signaling communication. According to the system of the present invention, networks can be continuously switched by setting multicast for temporarily flowing data to the basic access network.

Abstract: Object: To provide a mechanism and a function of a system that can determine a communication method and the like effectively utilizing frequency resources, considering priority of each communication, in a cognitive communication network system of a frequency shared type or the like assuming that a given frequency band is shared by a plurality of systems in use.

Abstract: To reduce power consumption for scanning and maintain communication quality by reducing the time for scanning or connection when a wireless communication terminal switches between networks or base stations. A wireless communication terminal 1 enabling connection with a plurality of base stations disposed in different positions which includes a base station scanning unit 100 detecting and scanning a base station capable of communication at the current position of the wireless communication terminal, a simultaneous detection base station recording unit 101 recording simultaneously detected base stations as simultaneous detection information in a storage unit, a connection candidate extraction unit 102 and a first communication unit 103 performing communication by connection with the extracted connection candidate base station.

Abstract: The present invention provides a user-carriable mobile communication relay device that relays communication between an internal network and an external network, in which even when the device is moved, the device dynamically selects and connects the external network depending on a surrounding radio wave environment or a communication content.

Abstract: The present invention provides a technique capable of processing to automatically and optimally select types of external networks and a communication system, and at the same time, capable of switching network selection upon a user's arbitrary opportunity. A communication connection device 1 is provided with: a network communication adaptor 13 connecting a terminal device 4; external network communication adaptors 11, 12 compatible with external networks; a network selection processing portion 102 automatically selecting a network from the external networks according to profile information 141 previously including at least one of types of networks and a communication system; re-selection processing instruction mechanisms 15, 103 designed to cause, as a result of a user's operation, the network selection processing portion 102 to start selection processing.

Abstract: A gateway (GW) and a plurality of foreign agents (FA) are connected in a ring-like manner, and the procedures of (1) the GW receiving an IP packet, addressed from a corresponding node CN to a mobile node MNa; (2) the GW transferring the packet to a link L1 in one direction; (3) an FA1 transferring the received packet to a link L2 in the same direction; (4) FA1 furthermore transferring the received packet to a link L4, connected to MNa, if the destination address of the received packet is already registered in the visitor list; (5) an FA2 transferring the received packet to a link L3 in the same direction; (6) FA2 furthermore ending the process as it is if the destination address of the received packet is not registered; and (7) the GW discarding the received packet.

Abstract: A technique that can effectively utilize unused wireless link and realize high-quality wireless communication between a communication terminal and a base station and enables efficient distribution of radio resources over an entire wireless communication system is provided. A wireless communication system in which a base station and a communication terminal can conduct wireless communication by detecting a usable wireless link and changing a wireless link used for the connection is also provided. On the communication network side, in addition to a plurality of wireless communication networks and a base station, a server device is provided.

Abstract: A method in which communication quality of a base station is accumulated according to type of an application and when a communication terminal device switches a base station, an optimal base station for each application is selected is provided. A wireless communication device of the present invention is provided with priority notifying means storing priority information of communication conducted by the local device and notifying it to the other wireless communication devices so that the priority can be notified to the outside. A priority information collecting means collects the priority information notified by the other devices, and a priority information comparing means compares the priority information of the local device with the collected priority information. Wireless communication control means is provided so that as the result of comparison, if the priority of the other devices is higher than the priority of the local device, the wireless communication means is controlled.

Abstract: To provide a method of selecting an optimal base station for each application when accumulating communication quality in response to an application type for a base station and a communication terminal switches base stations. A communication quality database 31 is prepared by assigning a current location of a communication terminal device, a currently running application program and a communication quality when executing an application program. When making a new connection with a base station, the current application and location is used to select a base station having an optimal communication quality from the communication quality database 31. This mechanism may be provided in the communication terminal device or may be provided as a communication system including a server device.

Abstract: It is an object of the present invention to provide a communication system to provide a communication system which requires no special application for a correspondent node and has a service handoff function enabling a transfer destination terminal device to be freely used, and its configuration equipment. In order to realize this, the communication system includes a correspondent node delivering communication data which can be executed by a predetermined application, a proxy server device which receives the communication data from the node to execute the application, and transfers the service to a transfer destination terminal device, the transfer destination terminal device outputting the service, and a user terminal device, wherein the user terminal device transmits control information to the proxy server device, and thereby the proxy server device switches the transfer destination terminal device to perform service handoff.