International Technology Roadmap for Semiconductors 2003の要求清浄度について － シリコンウエハ表面と雰囲気環境に要求される清浄度, 分析方法の現状について －

An architecture for a line card in a network routing device is provided. The line card architecture provides a bi-directional interface between the routing device and a network, both receiving packets from the network and transmitting the packets to the network through one or more connecting ports. In both the receive and transmit path, packets processing and routing in a multi-stage, parallel pipeline that can operate on several packets at the same time to determine each packet's routing destination is provided. Once a routing destination determination is made, the line card architecture provides for each received packet to be modified to contain new routing information and additional header data to facilitate packet transmission through the switching fabric. The line card architecture further provides for the use of bandwidth management techniques in order to buffer and enqueue each packet for transmission through the switching fabric to a corresponding destination port. The transmit path of the line card architecture further incorporates additional features for treatment and replication of multicast packets.

Pipelined packet switching and queuing architecture

A method is provided for modifying an image. The method comprises displaying an image, the image comprising a portion of an object; and determining if an edge of the object is in a location within the portion. The method further comprises detecting movement, in a member direction, of an operating member with respect to the edge. The method still further comprises moving, if the edge is not in the location, the object in an object direction corresponding to the detected movement; and modifying, if the edge is in the location, the image in response to the detected movement, the modified image comprising the edge in the location.

Information processing apparatus, information processing method and program

A router for use in a network includes a scalable architecture and performs methods for implementing quality of service on a logical unit behind a network port; and for implementing storage virtualization. The architecture includes a managing processor, a supervising processor; and a plurality of routing processors coupled to a fabric. The managing processor has an in-band link to a routing processor. A routing processor receives a frame from the network, determines by parsing the frame, the protocol and logical unit number, and routes the frame to a queue according to a traffic class associated with the logical unit number in routing information prepared for the processors. An arbitration scheme empties the queue in accordance with a deficit round robin technique. If a routing processor detects the frame's destination is a virtual entity, and so is part of a virtual transaction, the router conducts a nonvirtual transaction in concert with the virtual transaction. The nonvirtual transaction accomplishes the intent of the virtual transaction but operates on an actual network port, for example, a storage device.

Router with routing processors and methods for virtualization

Router and methods using network addresses for virtualization

A packet forwarding apparatus provided with a plurality of line interface units, comprises a routing processing unit for referring to a routing table, based on header information of received packet to specify one of output lines to output the received packet, a flow detection unit for referring to an entry table, in which a plurality of entries with flow conditions and control information are registered, to retrieve control information defined by the entry with a flow condition which coincides with that of the header information of the received packet, and a packet forwarding unit for transferring the received packet to one of the line interface units connected to the output line specified by the routing processing unit. The entry table id divided into a plurality of subtables corresponding to the values of flow attributes associated with the received packets and the flow detection unit retrieves the control information from one of said subtables specified by the value of the flow attribute corresponding to the received packet.

Packet forwarding apparatus with a flow detection table

A power-saving packet forwarding device realizing electric power that accords to the number of lines in which communication is performed and a traffic volume inputted from the lines. A header processing unit with which the packet forwarding device is equipped has a plurality of packet processing circuits for performing a packet processing. A line number decision circuit monitors the number of lines in which communication is performed and a traffic volume inputted from the line, and decides presence or absence of an operation of a packet processing circuit. Based on this decision result, a power supply and a clock of the packet processing circuit that does not need to operate are interrupted, and accordingly power saving of the packet forwarding device is realized.

Packet forwarding device

Cells are discarded in conformity with the order of priority when congestion occurs by discarding cells of a traffic class without any special contract for a transfer rate at the time of setting up a connection A node stores priority information concerning cell discard corresponding to a connection identifier and controls the cell discard in accordance with the discard condition determined by the accumulated number of cells for each connection in the node and cell priority

Packet switching device and cell transfer control method

Every router in a network is provided with flow detecting means that detects a flow from a packet header of a packet so as to perform such packet processings as bandwidth monitoring, priority-based transferring, statistical information collecting with respect to each packet flow. Receiving a packet from a site, an edge router detects the packet flow and writes a flow identifier in the packet. Each flow identifier is uniquely decided in the network. The Internet router performs such packet processings as bandwidth monitoring, priority-based transferring, statistical information collecting with respect to each flow according to the flow identifier. The present invention can thus prevent the network from degradation of transferring performance caused by the flow detecting means of a backbone router.

Packet transferring method and apparatus that employs the same

A packet switch for setting a connection between a transmission source of a packet and a reception destination thereof so as to perform communication. The invention includes a packet buffer which includes at least one input port and a plurality of output ports. An input packet from the input port is delivered to at least one output port in accordance with address information of the input packet and connection information having been set in the packet switch at the time of setting the connection between the transmission source and the reception destination. A bandwidth management packet for giving notice of a congested state of the packet switch is transferred on the connection. The invention further includes a register which holds threshold value information for indicating an amount of use of the packet buffer that causes congestion, a counter which provides a count representative of a current amount of use of the packet buffer, a comparator which compares the count from the counter and the threshold value information from the register and outputs a result of the comparison, and a congestion decision/notification circuit which writes congestion notification information into the bandwidth management packet based on a result of the comparison by the comparator.

Takeki Yazaki

Papers

Packet forwarding apparatus with a flow detection table

Packet forwarding device

Packet switching device and cell transfer control method

Packet transferring method and apparatus that employs the same

Packet switch and congestion notification method