Hitachi, Ltd.

Other

Kazuho Miki

Akihiko Takase

Koji Wakayama

Tetsuro Yoshimoto

Noboru Endo

Masahiro Takatori

Masaru Murakami

Hajime Abe

Masao Kunimoto

Kenichi Sakamoto

Daisuke Matsubara

Yoshito Sakurai

Hiroaki Miyata

Tetsuhiko Hirata

Nobuo Ogasawara

Hiroshi Kurihara

Takumi Oishi

Ken'ichi Sakamoto

Satoshi Nagano

Narihiro Oomoto

A content control system capable of controlling delivery destinations of user contents in respective groups, identifying each group through which each content is delivered, and delivering information/advertisements according to the attribution information of the content. In a content control server, group identifying information is set in each user content to be uploaded to or downloaded from a group memory area corresponding to a gateway ID from a terminal through a gateway having a plurality of its subordinate terminals. The information identifies each gateway through which each object content is delivered according to the gateway ID. The control system controls the delivery destination of each content according to the combination of the content delivery route and a table prepared in the content control server.

Content control system

An access node run as a packet switching apparatus enables IP connection services for a plurality of access methods; e.g., relatively low-speed IP connection, high-speed IP connection, and mobile network IP connection. By using this apparatus of the present invention, cost can be reduced and upgrading to advanced access networks and access services is easily carried out. Provision of the above access nodes implements upgrade-type network services common for diverse protocols. Each access node retains a pathfinding table to which input port, input tunnel identifier and input session identifier entries in a set are registered per session. When routing a packet, by looking up the set of these entries matching with the packet, the associated output port, output tunnel identifier, and output session identifier are obtained. After processing for the packet, appropriate for one of the plurality of access methods and network services, the node forwards the packet over the routed path.

Packet switching apparatus

A label switching type packet forwarding apparatus having a routing information table in which a forwarding type of a reception packet, output port identification information, and output routing information of a specific layer in the OSI reference model determined by the forwarding type are defined in correspondence with routing information which is found upon reception of a packet, for converting a header of a reception packet in accordance with the packet forwarding type and the output routing information obtained by a table search.

Label switching type of packet forwarding apparatus

In a specific embodiment of the invention, a peer-to-peer interfacing device is described. The particular embodiment of the invention facilitates access by a Web browser, allowing a Web user to benefit from the access capability of a peer-to-peer network, such as file sharing. The interfacing device can communicate using a standard protocol (e.g., HTML), thus allowing the Web user to access the peer-to-peer network with a conventional Web browser. The interfacing device can interact on the peer-to-peer network side, and thus appears to the peer-to-peer network as a peer machine.

Method and apparatus for peer-to peer access

Disclosed embodiments of the present invention include a peer-to-peer network comprising management server and a notification server. Information of interest can be subscribed to by peer clients. The notification server can then notify subscribing peer clients of modified information. A pure peer-to-peer architecture is also disclosed.

Method and apparatus for alert distribution and archive sharing

Upon initialization, a VPC is set up between edge nodes. A control processor of each node creates an IP address/VPC mapping table using IP routing information and an address mapping table mapping correspondence between IP addresses and ATM addresses and supplied by a network management system. A gateway assigns a VCC to each packet input to the network. A sending-side edge node inputs the packet to the VPC corresponding to its destination by referring to the IP address/VPC mapping table. A transit node performs packet switching over VP. A receiving-side edge node transfers each packet to the gateway corresponding to its destination. If a series of packets meet a predetermined condition in a given edge node, its control processor sends VCC information to input interfaces of the edge node so that the packets are switched by an ATM switch in the edge node without intervention of the control processor.

Packet switching system, packet switching network and packet switching method

A scheme and a device for managing a user state and a plurality of terminal states on a presence server, and for automatically selecting an optimum terminal by using both the user state and the terminal states. Priority degrees which depend on the terminal states are set, then selecting a terminal whose priority degree is the highest of the plurality of terminals. In association therewith, a priority rank which is set depending on the user state is also taken into consideration, thereby selecting a final optimum terminal. The present scheme makes it possible to automatically perform a fine-grained selection of the optimum terminal in which both the terminal states and the user state are taken into consideration.

Presence management server and system

Communication between a caller client system and a callee client system is based on selection of a suitable communication program from a list of communication programs. The list of communication programs is determined based on the callee's communication environment.

Method and apparatus for choosing a best program for communication

This invention provides a network management equipment and a packet switching equipment which eliminate a connection setup delay time, reduce a delay and a delay variation involved in data transfer, and effectively perform connectionless data flow processing in a large data network. The network is divided into a connection-oriented core network and a plurality of connectionless access networks connected to the core network where a plurality of connections (called permanent virtual route (PVR)) are set up among a plurality of edge nodes. The network management equipment selects one route from a plurality of PVRs for connectionless data flow received from one of the access networks and transfers data along the PVR.

Packet switching network, packet switching equipment and network management equipment

In a system in which communication is performed among a plurality of devices having a mechanism of disassembling a packet into ATM cells to send them and a plurality of devices having a mechanism of assembling the received ATM cells into the packet, a frame is prevented from being lost owing to change of virtual connections in the course of transferring the frame, improving reliability of the communication on the packet level. When the switch receives a request for change of switching, it does not processes that request at once, but confirms that the cell located at the boundary of the frame has been processed, before processing the change request, so as to protect the frame. When the switch receives a request for change of switching, it protects a frame by multicasting the cells to both destinations before change and after change, for a given period of time.

IP switch, interface circuit and ATM switch used for IP switch, and IP switch network system

A router apparatusis provided with an ATM switch, an IP controller for performing routing control as a controller for layer, plural kinds of interfaces which are individually provided to plural transmission paths in which various communications are performed, and a cell multiplexing/demultiplexing unit, and manages the cell communications between respective parts on the basis of identification information. The input packet is subjected to IP processing in an interface to be converted to a cell in a common format, and the cell is serially multiplexed with a cell from another interface on a cell basis, and transmitted to the ATM switch at the cell multiplexing/demultiplexing unit. Each interface and each cell multiplexing/demultiplexing unit sets and switches the identification information for the header portion of the packet and the cell to be communicated by using a table in which the corresponding relationship of the identification information is registered.

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Kokubunji, Japan

Kazuho Miki