Kabushiki Kaisha Toshiba

Hisako Tanaka

Yasuhiro Katsube

Tatsunori Kanai

Hiroshi Yao

Seiji Maeda

Toshiki Kizu

Kenichi Nagami

Osamu Torii

Takeshi Yokokawa

Hirokuni Yano

Hiroshi Mizoguchi

Tetsuro Itakura

Koji Yamaguchi

Takeshi Saito

Akira Morishita

Satoshi Ito

Satoshi Takayama

Mikio Hashimoto

Hitoshi Nagato

Chiaki Tanuma

Shuzo Hirahara

Hideki Nukada

Isao Amemiya

Yoshiaki Takabatake

Toru Imai

Shiroh Saitoh

Yoichi Tokai

Yoichi Takebayashi

Mika Fukui

Tutomu Saito

Mamoru Izumi

Shunsuke Hattori

Seiji Miike

Kumi Okuwada

Masami Sugiuchi

Yoshiaki Kurosawa

Yoshikuni Matsumura

Yasushi Kawakura

Shigenobu Seto

Fumihiko Murakami

Hideaki Shinchi

Noriko Y Kudo

Atsuko Nakamura

Seizaburou Shimizu

A scheme for systematically registering meta-data with respect to various types of individual data so as to enable sophisticated retrieval or application program construction assistance utilizing the meta-data in a data server is disclosed. A data type of registering data to be registered into a data server that registers and manages data and meta-data for data, and one procedure corresponding to the detected data type is selected from a plurality of procedures provided in correspondence to respective data types and stored in advance, each procedure having a program code for generating the meta-data for data according to a corresponding data type. Then, the meta-data for the registering data are generated by executing the program code of the selected procedure, and the generated meta-data are registered in relation to the registering data.

Scheme for systematically registering meta-data with respect to various types of data

A scheme for constructing a database in a user system, which can automatically store those portions of the structured documents which contain important contents without exerting a burden on the user is disclosed. A structured document provided by a server device is obtained according to a document request made by the user system, where each structured document has a structure represented by tags in each structured document. Then, at least one important portion is automatically extracted from the structured document by utilizing the structure of the structured document according to prescribed extraction criteria specified in advance, and the extracted important portion is stored into the database, while the obtained structured document is transferred to the user system.

Scheme for constructing database for user system from structured documents using tags

A scheme for systematically registering meta-data with respect to various types of individual data so as to enable sophisticated retrieval or application program construction assistance utilizing the meta-data in a data server is disclosed. A data-type of registering data to be registered into a data server that registers and manages data and meta-data for data, and one procedure corresponding to the detected data type is selected from a plurality of procedures provided in correspondence to respective data types and stored in advance, each procedure having a program code for gene rating the meta-data for data according to a corresponding data type. Then, the meta-data for the registering data are generated by executing the program code of the selected procedure, and the generated meta-data are registered in relation to the registering data.

Scheme for systemically registering meta-data with respect to various types of data

In a label switched path (LSP) including label switching nodes, some of which process a Time To Live (TTL) value of a generic label header and others of which that do not process the TTL value, an adequate hop-count information regarding the LSP is reported from node to node by using a label distribution protocol. A node, which has received a message including a hop-count of the LSP from an upstream node or a downstream node, determines whether or not the node itself is to update the TTL value in a packet if received through the LSP. The node then transmits a message indicating that the hop-count is one or a message including the incremented hop-count, in accordance with this determination, to the downstream node or the upstream node. Thus, upon transferring packets on the LSP, the nodes forming the LSP that process the TTL value can appropriately decrement the TTL value of the packet.

Method of managing hop-count in label switching network and node apparatus

A router is usable to transfer a packet from a first node belonging to one logical network to a second node belonging to another logical network. The router receives a first message for resource reservation from the second node, and stores a correspondence relationship between a first virtual connection available for receiving a packet of a specified flow from the first node and a second virtual connection available for transmitting the packet of the specified flow to the second node, when the first and second virtual connections exist. The router transmits a second message for resource reservation based on the first message to the first node, when the correspondence relationship can be stored. Alternatively, the router, after transmitting the second message to the first node irrespective of the correspondence relationship, transmits a cancellation message to the first node for canceling the second message depending upon whether the correspondence relationship can be stored.

Router apparatus and method of using a virtual connection to transfer a packet

A mechanism for performing multicast packet transfer when a certain one of the destination nodes participating in the multicast communication requires resource reservation for a certain packet flow specified among the packet flows to that destination node. A system may transfer multicast packets using a plurality of virtual connections based on which flow the packets to be transferred belong to, so that each node receives the packets without duplication. Alternatively, a system may selectively discard received packets to avoid processing duplicated packets, although duplicated packets are received at each node.

Network node and method of packet transfer

A router device for controlling label switching path set up is disclosed. In the router device, a,policy information indicating a permitted starting point of a label switching path is stored, and a request message that contains a starting point information indicating a starting point node/network of the requested label switching path and a stream information indicating a desired packet stream to be transferred through the requested label switching path is received. Then, whether or not to permit the set up of the requested label switching path is judged by comparing the starting point information contained in the request message with the stored policy information, and the requested label switching path through the router device for the desired packet stream indicated by the stream information contained in the request message is set up when the set up of the requested label switching path is judged as permitted. Instead of the starting point information, a neighbor information, a stream information, or an ending point information may be used.

Node device and method for controlling label switching path set up in inter-connected networks

A node manages a virtual connection (VC) in a network such that at least one unused virtual connection to the neighboring node is established and registered. When a VC is needed to transmit a packet, the node obtains the required VC by selecting one of the registered unused VCs instead of setting up a new VC. When a VC in use becomes no longer necessary, the node registers the VC as an unused VC instead of releasing the VC.

Node apparatus and method of using a virtual connection to transmit a packet

A packet transfer control method and a node device which are capable of providing a dedicated cut-through path for a specific end-to-end packet flow, while reducing a time required until the cut-through path is established, so as to be able to reduce the load of the address analysis processing at the router. One node belonging to one logical network stores an information indicating an existence of a first dedicated virtual path for transferring packet flows specified by a first condition, which is capable of transferring packets without applying a network layer processing up to another node belonging to another logical network, and the communicates an identifier information for identifying a second dedicated virtual path for transferring a packet flow specified by a second condition which is more specific than the first condition by utilizing the first dedicated virtual path, and a condition information for indicating the second condition, in order to set up the second dedicated virtual path up to a termination point node of the first dedicated virtual path or a further downstream side node, between that one node and the termination point node.

Packet transfer control method and node device using plurality of dedicated cut-through paths

A system for forming one point-to-multipoint connection provides various service attributes in an ATM network in response to differences in service attributes requested by receiving parties or differences in available resources. A network node sets up an output VC (Virtual Channel) link to be connected to an input VC link, the VC links being parts of a point-multipoint connection, receives a new VC link set-up request, and adds to the point-multipoint connection, in response to the new VC link set-up request, new output VC link with service attribute different from that of the input VC link.

Network node apparatus and virtual connection control method for

An ink-jet recording apparatus records an image onto a recording medium by flying an ink-droplet from an ink surface by a pressure of an ultrasonic beam. The apparatus including an ultrasonic generating element array having a plurality of ultrasonic elements arranged in an array for emitting ultrasonic beams, a driving device for applying a plurality of pulses having different phases from each other, and a converging device for converging the ultrasonic beams by interfering the ultrasonic beams with each other. The generating elements are simultaneously driven and sequentially shifted in an array direction, and the converging device converging the ultrasonic beams in a direction perpendicular to the array direction.

Ink-jet recording device having an ultrasonic generating element array

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Tokyo, Japan

Hisako Tanaka