Fujitsu Corporation

Shinya Yamamura

Masaaki Wakamoto

Mitsuaki Kakemizu

Yoichiro Igarashi

Kazunori Murata

Yoshiharu Sato

Masaaki Takase

Jun Maeda

Junichi Suga

Kenichi Fukuda

Yasuki Fujii

Haruyuki Takeyoshi

Izuru Sato

Katsuichi Nakamura

Keiki Nishihara

Ken-ichi Takeshita

Kota Ejima

Shin-ichi Matsumoto

Tadakatsu Nagao

Katsunori Iwamoto

An authorization apparatus includes a memory configured to store attribute information associating an identification information of data and information indicating an attribute of the data, the data being stored in a data server, a processor configured to generate an access token in association with an extraction condition to be used for extracting the data to be obtained by a terminal, and a communicator configured to receive a target access token from the data server, wherein when receiving the target access token, the processor is configured to extract identification information of data pieces satisfying the extraction condition associated with the target access token, and generate a list of identification information of the data to be disclosed to the terminal using a target access token, and the communicator transmits the list to the data server.

Authorization apparatus, data server and communication system

A relay communication device includes a memory and a processor coupled to the memory and configured to: receive data from an application, and determine a relay path of each of a plurality of data received from the application according to a protocol of a disruption tolerant network based on data remaining amount to be relayed to a communication destination in response to receiving of new data of the application and a priority of each of the plurality of data.

Relay communication method and relay communication device

A non-transitory computer readable recording medium storing therein a communication program, the communication program relaying communication from an application operating on a terminal to a communication destination and causing a computer to execute a process, the process including: switching a communication protocol for the communication from a first protocol to a Delay/Disruption Tolerant Networking (DTN) protocol, in accordance with a connection condition with the communication destination for the communication; and notifying the terminal of a failure of a specific communication in cases when the specific communication has been notified to the application as completed and the specific communication in the DTN protocol results in failure.

Non-transitory computer readable recording medium, communication method and communication device

A relay device communicates with first and second terminal devices via first and second communication networks, respectively. The relay device determines whether or not a line stability and a line speed of each of the first and second communication networks satisfy a predetermined condition. When a line stability and a line speed of each of the first and second communication networks satisfy the predetermined condition, the relay device temporarily stores, in a memory, data received from the first terminal device via the first communication network, and transfers the temporarily stored data to the second terminal device via the second communication network.

Apparatus and method for transferring data via heterogeneous networks

A node apparatus connected to an information retention apparatus and a plurality of information reference request apparatuses via a network. The node apparatus includes a memory configured to store content identification information of content retained in the information retention apparatus, identification information of a first information reference request apparatus, and identification information of the information retention apparatus that are acquired through an information search initiated by a request from the first information reference apparatus. When the node apparatus receives a content acquisition request including the content identification information from a second information reference request apparatus identification information of which is not stored in the memory, the node apparatus acquires the content from the information retention apparatus and respond to the request including the content identification information on behalf of the information retention apparatus.

Node apparatus operating as proxy server

A first monitoring device is disposed at a predetermined position and configured to monitor a location of an information apparatus that is movable, by performing a radio communication with the information apparatus. A second monitoring device is movable and configured to monitor a location of the information apparatus by performing the radio communication with the information apparatus. An apparatus monitoring device causes the radio communication with the information apparatus to be taken over between the first monitoring device and the second monitoring device, and collects results of monitoring the information apparatus, from the first monitoring device or the second monitoring device which has taken over the radio communication with the information apparatus.

Apparatus and method for monitoring a location of a movable information apparatus

A context information collection and distribution system registers read identification information in a computer device that manages and controls an RFID tag reading device and is located in a lowest hierarchy in wide area network topology. The computer device located in the lowest hierarchy in the wide area network topology notifies a computer device located in a higher management domain hierarchy that the computer device located in the lowest hierarchy manages read identification information of a target. Further, the computer device located in the management domain hierarchy notifies a computer device located in much higher ID system hierarchy that the computer device located in the hierarchy just under the management domain hierarchy manages the read identification information of the target.

Context information collection management system

A presence communication system capable of efficiently reducing the number of messages exchanged between presentities and watchers, thereby preventing lowering in communication quality. A presence server sets a group identifier as an identifier which is used to collectively look up a group of multiple pieces of presence information provided by presence information providers who have agreed to a use policy, aggregates and stores the presence information under the group identifier, and delivers the presence information requested to the group identifier. Each presentity provides the presence server with its presence information targeted to the group identifier. Each watcher requests the group identifier for the presence information provided by the presentities, and receives the presence information delivered from the presence server.

Presence communication system

An authentication method is disclosed that makes the identification information of an object public and performs authentication in referring, from the identification information, to the information of the object corresponding to the identification information. The method includes generating a third value through a predetermined operation of a temporary first value generated every time the identification information is referred to and a temporary second value generated for a referrer to the identification information; encrypting the third value by first and second different encryption methods; decrypting the third value encrypted by the first encryption method in a tag device attached to the object; and decrypting the third value encrypted by the second encryption method in an apparatus managing the information of the object, and comparing the third value decrypted in the apparatus with the third value decrypted in the tag device, thereby verifying the relationship between the object and the referrer thereto.

Tag authentication system

The present invention is an authentication method for disclosing identification data of an object and authenticating when referring to data of the object corresponding to the identification data based on the identification data and can associate a tag device and data of a referring entity and authenticate that data of the tag device is referred by a proper referring entity by generating a third value by conducting a predetermined calculation with a temporary first value indicating a most recent referral to the identification data of the object and a temporary reference second value issued to a referring entity of the identification data for each referral, and authenticating a relationship between the object and the referring entity by verifying the third value.

Authentication method, authentication system, and tag device thereof, data reference client, authentication server, and data server

A network access control method for a network system comprising network apparatuses having a packet filtering function, a service server connected with an IP network via the network apparatus, providing a service to a user, a user terminal connected with the IP network via the network apparatus, for the user to utilize the service provided by the service server, a reception server connected with the IP network via the network apparatus, receiving an access from the user for the service server, and an access control server controlling the network apparatuses. The method comprising the steps of a) the reception server receiving access request information from the user terminal, and holding it, and b) the access controlling server performing traffic control such as to extract, based on processing capability of the service server and a traffic amount for the service server, such an amount of the access request information as that the service server can optimally deal with, so as to allow the access for the service server.

Network access control method, network system using the method and apparatuses configuring the system

In a system including a first unit retaining a first identifier and a second unit retaining a second identifier for reading out the first identifier from the first unit to transmit, as cooperation information, a combination of the first identifier and the second identifier, for managing the cooperation information, a cooperation information managing apparatus receives the cooperation information and registers the second identifier included in the cooperation information and a group of a plurality of first identifiers including the first identifier included in the cooperation information in a state associated with each other. For managing objects to be used by a user, this enables managing the objects as an aggregation without handling the objects individually, thereby realizing efficient management from a user's point of view.

Cooperation information managing apparatus and gateway apparatus for use in cooperation information managing system

A network system which provides each terminal user with differentiated service, dynamically changing service profiles even in the middle of a communication session. A service control database maintains service profile definitions. When a mobile node registers with a foreign agent to initiate a conmiunication session, a service profile setting controller in the mobile node's home server sets up a service profile for the mobile user. When an event occurs within a service profile updating controller, it indicates that some control condition specified in the service profile is met. The service profile updating controller then makes access to the service control database to obtain a new service profile and the mobile node's foreign server forwards it to the foreign agent, to which the mobile node is attached. The service profile that has been established in relevant network nodes, including the home agent and foreign agent, is dynamically updated with the new one.

Network system with dynamic service profile updating functions

Linked with a position registration procedure in a mobile IP, the invention provides a VPN setting service using an IP Sec. tunnel between optional terminals without requiring these terminals to have a specific VPN function. This service is provided by a mobile terminal, authentication servers, a VPN database, and network apparatuses. A home authentication server extracts from the VPN database the VPN information of a user who has requested the authentication at the time of making a position registration request from the mobile terminal. The home authentication server then posts the VPN information to each network apparatus using a predetermined position registration message and an authentication response message. Based on the posted VPN information, the network apparatuses set a VPN path by the IP Sec. to between a home network apparatus and an external network apparatus, between the home network apparatus and a predetermined network apparatus, and/or the external network apparatus and the predetermined network apparatus, respectively.

VPN system in mobile IP network, and method of setting VPN

The mobile network system and the service control information changing method are disclosed in which by transmitting a registration request message containing change information of service content from the mobile terminal equipment to a foreign agent apparatus, the service control information concerning the mobile terminal equipment that is possessed by each of the foreign agent apparatus, a foreign server apparatus, a home server apparatus, a home agent apparatus, and a correspondent node is updated.

Growing community of inventors

Fukuoka, Japan

Shinya Yamamura