Nec Corporation

Teijin Limited

Mitsubishi Materials Silicon Corporation

Sumitomo Mitsubishi Silicon Corporation

Sumco Corporation

The Chemo-sero-therapeutic Res. Inst.

Yoji Suzuki

Masanori Takashima

Hisashi Furuya

Kazuhiro Harada

Atsushi Imaizumi

Senlin Fu

Takashi Sugiyama

Yataro Ichikawa

Keizo Inoue

Ichiro Kudo

Hirokazu Yoshida

Takashi Kamimura

Yorimasa Suwa

Takaaki Shiota

Tetsu Izawa

Masashi Hayashi

Masahiro Okada

Kazushi Kubota

Hiroshi Koya

Hidenobu Abe

Yukio Muroi

Kenichi Masuda

Ken Fujita

Hisao Yamaguchi

Toshiaki Harada

Eishin Yoshisato

Mamoru Takajo

Tomohiro Kase

Keisuke Torigoe

Norihito Fukatsu

Takahiro Otake

Akihiro Ginnaga

Syoji Ono

Hiroshi Imai

Shoji Ono

Shin Sakuma

Hisashi Kitagawa

Naoyuki Iwashita

Longjiang Wang

Shohei Nagakura

Hitoshi Ohmori

Akiko Azuma

Yoshiko Kawakami

Nozomi Shimada

Shihomi Matsumura

Masaharu Kanesaki

Hiroshi Koba

Akira Yamada

A control apparatus includes: a first control unit that configures a first virtual network by setting control information in a relay apparatus(es); a multicast group management unit that holds a configuration(s) of a multicast group(s) configured by an apparatus(es) connected to the relay apparatus(es); a multicast path calculation unit that calculates a path(s) for transmitting a multicast packet(s) to the apparatus(es) that belongs to the multicast group(s) on the basis of information about a topology representing a connection relationship about the relay apparatus(es); and a second control unit that sets control information instructing forwarding of the multicast packet(s) along the path(s) in the relay apparatus(es).

Control apparatus, communication system, relay apparatus control method, and program

A communication apparatus comprises a packet reception notifying unit that, when receiving predetermined packets, transmits to a predetermined control apparatus a packet reception notification, wherein the packet reception notification indicates that the predetermined packets have been received. Regarding a packet specified by the control apparatus among the predetermined packets, the communication apparatus performs predetermined transmission restraint control of the packet reception notification.

Communication apparatus, control apparatus, communication system, received packet processing method, communication apparatus control method, and program

A switch system allows free change of a grain degree of monitoring without being conscious of a routing control. For example, a control protocol of a transmitter is used based on the open flow (OpenFlow) technique to control the monitoring function of the switch system, and the centralized control of the monitoring can be realized as the whole network and the monitoring result is reflected on the routing control. Here, the switch has a flow table for packet transfer and a flow table for monitoring. Both of the tables are searched to one packet and a multi-hit operation is performed to execute the operation of each of the entries. That is, both the tables are searched and the packet is transferred according to corresponding flow entries.

Switch system, and monitoring centralized control method

A switch includes at least a first table and a second table different in mapping of egress information of a network and user information to a packet. The first table is searched for a first packet received and operation according to an action corresponding to a search key of the first table is applied to the first packet to convert the first packet to a second packet. The second packet is supplied to the second table. The second table is then searched for the second packet. When the search key of the second table is matched, the operation according to the action corresponding to the search key of the second table is applied to the second packet to convert the second packet to a third packet (refer to FIG.).

Network control method, network system, apparatus, and program

A communication system comprises: a plurality of switches divided into a plurality of domains; a plurality of first control apparatuses that control a switch included in a corresponding domain; and a second control apparatus that controls the plurality of first control apparatuses. One first control apparatus corresponding to one domain out of the plurality of domains determines processing content on a packet of first communication between terminals accommodated by different switches included in the one domain based on a first database held by the one first control apparatus. The second control apparatus determines processing content on a packet of second communication between terminals accommodated by switches included in different domains out of the plurality of domains based on a second database held by the second control apparatus.

Communication system, control apparatus, communication control method and program

A switch apparatus includes: a plurality of ports; a VLAN setting management unit that sets VLAN information in the plurality of ports and manages the VLAN information set in the plurality of ports; and a VLAN setting unit that, when VLAN information to be added to an output packet specified in control information received from a predetermined control apparatus is not set in an output port for the output packet, instructs the VLAN setting management unit to set VLAN information specified in the control information in a corresponding output port.

Switch apparatus, VLAN setting management method and program

A packet processing apparatus includes: a flow table in which flow entries can be stored in areas allocated in order of priority groups; an entry management unit that determines, upon receiving a new flow entry from a prescribed control apparatus, a storage position in the flow table based on which priority group among the plural priority groups the new flow entry belongs to, and on a level 2 priority that is used for determining position within the priority group; and an entry retrieval unit that scans from the beginning of the flow table, retrieves an entry having match condition(s) that match(es) a received packet, and determines processing to be applied to the received packet.

Packet processing apparatus, flow entry configuration method and program

The communication device comprises a first table that stores a first entry in which a match condition that includes at least a destination address is associated with an output destination of a packet matching the match condition; a second table that stores a second entry having a predetermined match condition; a destination learning unit that registers a set of a source and a receiving port of a received packet as a match condition and an output destination, respectively, in the first table; and a packet processing unit that forwards a packet to an output destination determined in the first table when an entry having a match condition matching a received packet is found from each of the first and second tables. The packet processing unit broadcasts a received packet according to a third entry when no entry having a match condition matching the received packet is found.

Communication node, communication system, control apparatus, packet forwarding method, and program

A switch apparatus includes: a plurality of ports; a VLAN setting management unit storing entries, in each of which VLAN information and at least one of the plurality of ports are associated with each other, and adding or updating, if an entry corresponding to a combination of VLAN information included in a packet received from a port and the reception port of the packet is not stored, a corresponding entry for the received packet; and a functional unit notifying a predetermined control apparatus of an added or updated content of the entry.

Switch apparatus, VLAN setting management method, and program

In the present situation, a switch cannot identify inner tag data (VLAN ID data before QinQed in the input of OF-NW) given to each of packets which flow in an open flow network (OF-NW). Therefore, OF-NW composed only one VLAN cannot handle a plurality of VLANs. Specifically, a controller handles a plurality of VLANs in the OF-NW in which there is only one VLAN, by mapping the inner tag data given to the packets which flow through the OF-NW, and flow cookie data showing the flow entry corresponding to the packets which flow through the OF-NW. Specifically, the flow flowing into the OF-NW is transferred from the switch to the controller, and the controller learns VLAN ID data in the input of the OF-NW, and handles the plurality of VLANs by mapping this VLAN ID and the flow cookie data showing the flow entry corresponding to the packet in the OF-NW.

Network system and VLAN tag data acquiring method

A switch system realizes extension of the number of entries of an open flow table by using tables in a switch as existing resources. Specifically, the switch configures an open flow table by logically combining a plurality of tables, each of which defines processing to a given packet, based on a condition and a processing content defined in each table. The switch refers to the open flow table to determine the processing content to a reception packet. The switch executes the processing of the reception packet based on the determined processing content.

Switching system, switching control system, and storage medium

In a network communication apparatus, transfer and discard processing is realized for each transfer frame having a priority, and a band limitation is carried out to prevent the congestion of a transfer destination apparatus. Specifically, a bucket is provided for every priority, and tokens of an amount determined based on the priority are supplemented. Moreover, before a bucket evaluation, one shared bucket is provided. All of the tokens existing in the bucket provided for every priority are transferred to the shared bucket for every constant period. The tokens overflowing beyond a capacity of the shared bucket are discarded. All of the frames are equally evaluated and transferred regardless of the priority of each of the frames, as far as the token exists in the shared bucket. When there is no token in the shared bucket, switching to the preferential band limitation is carried out and each priority bucket is evaluated. The bucket corresponding to the priority of the frame is checked and when the token exists, transfer processing of the frame is carried out. When there is no token, discard processing of the frame is carried out.

Network communication apparatus and method of preferential band limitation of transfer frame

A heat shielding member is provided in a device pulling up a silicon single crystal rod from a silicon melt stored in a quartz crucible, and equipped with a tube portion which shields radiant heat from the heater surrounding the outer peripheral face of the silicon single crystal rod, a swelling portion provided at the lower portion of the tube portion, and a ring-shape heat accumulating portion provided at the inside of the swelling portion. The heat accumulating portion is a thermal conductivity of 5 W/(m&#xb7;&#xb0; C.) or less, its inner peripheral face is a height (H) of 10 mm or more and d/2 or less when the diameter of the silicon single crystal rod is referred to as d and the minimum distance (W) between the outer peripheral face of the silicon single crystal rod and the inner peripheral face of the heat accumulating portion is formed so as to be 10 mm or more and 0.2 d or less, a vertical distance (H) between the upper rim of the outer peripheral face and the lowest portion of the heat accumulating portion is 10 mm or more and d or less, and the minimum distance (W) between the inner peripheral face of the quartz crucible and the outer peripheral face of the heat accumulating portion is 20 mm or more and d/4 or less.

Heat shielding member of silicon single crystal pulling system

[Problem] A silicon single crystal ingot in which point defect agglomerates do not exist over a substantially entire length thereof is manufactured without reducing a pure margin. [Solving Means] A heat shielding membercomprises a bulge portionwhich is provided to bulge in an in-cylinder direction at a lower portion of a cylindrical portionand has a heat storage memberprovided therein. A flow quantity of an inert gas flowing down between the bulge portionin the heat shielding memberand an ingotwhen pulling up a top-side ingotof the silicon single crystal ingotis set larger than a flow quantity of the inert gas flowing down between the bulge portionand the ingotwhen pulling up a bottom-side ingotof the silicon single crystal ingot, thereby pulling up the ingot. Alternatively, an intensity of a cusp magnetic fieldwhen pulling up the top-side ingotis set higher than an intensity of the cusp magnetic fieldwhen pulling up the bottom-side ingot

Silicon single crystal pulling method

A silicon single crystal ingot is pulled at a pull rate so that the interior of the ingot results in a perfect region in which agglomerates of interstitial silicon-type point defects and agglomerates of vacancy-type point defects are absent, while rotating a quartz crucible for storing a silicon melt at a predetermined rotation speed and rotating the ingot pulled from the silicon melt in the opposite direction to the rotation of the quartz crucible at a predetermined rotation speed. An average rotation speed CRof the quartz crucible during the pulling of a top ingot portion is set to be faster than an average rotation speed CRof the quartz crucible during the pulling of a bottom ingot portion of the silicon single crystal ingot.

Method of manufacturing silicon single crystal and silicon single crystal manufactured by the method

Growing community of inventors

Tokyo, Japan

Yoji Suzuki