Patents by Inventor Tsuneo Katsuyama
Tsuneo Katsuyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7433958Abstract: A packet processing unit and a session managing unit, which are conventionally arranged in a server, are arranged in a network connecting device, and the network connecting device performs a packet relay process based on session management. As a result, the load on a server is reduced, and a process by the server is performed faster.Type: GrantFiled: April 11, 2006Date of Patent: October 7, 2008Assignee: Fujitsu LimitedInventors: Kuniaki Shimada, Ken Yokoyama, Toshihiko Kurita, Tsuneo Katsuyama, Takeshi Kawasaki, Koichi Takaba, Hiroyasu Kageyama
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Patent number: 7197014Abstract: A computer-readable recording medium recording a program capable of accurately analyzing the cause of a performance fault at the very end point of a client system, server system, etc. Outgoing and incoming packets are captured during execution of a communication application to measure a round trip time, and a communication window size of the transmitting source is estimated based on the captured incoming packets. A throughput estimate is calculated from the round trip time and the communication window size, and the estimated value and actual measured value of the throughput are displayed on, for example, a display, together with various other communication parameters including the communication window size and the round trip time, whereby the cause of a performance fault can be accurately located by quantitative analysis.Type: GrantFiled: December 23, 2004Date of Patent: March 27, 2007Assignee: Fujitsu LimitedInventors: Tsuneo Katsuyama, Masanobu Morinaga, Hideaki Miyazaki, Yuji Nomura, Takeshi Yasuie, Noriyuki Fukuyama, Masaaki Wakamoto, Satoshi Nojima
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Patent number: 7107348Abstract: A packet processing unit and a session managing unit, which are conventionally arranged in a server, are arranged in a network connecting device, and the network connecting device performs a packet relay process based on session management. As a result, the load on a server is reduced, and a process by the server is performed faster.Type: GrantFiled: January 28, 2002Date of Patent: September 12, 2006Assignee: Fujitsu LimitedInventors: Kuniaki Shimada, Ken Yokoyama, Toshihiko Kurita, Tsuneo Katsuyama, Takeshi Kawasaki, Koichi Takaba, Hiroyasu Kageyama
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Publication number: 20060168328Abstract: A packet processing unit and a session managing unit, which are conventionally arranged in a server, are arranged in a network connecting device, and the network connecting device performs a packet relay process based on session management. As a result, the load on a server is reduced, and a process by the server is performed faster.Type: ApplicationFiled: April 11, 2006Publication date: July 27, 2006Applicant: FUJITSU LIMITEDInventors: Kuniaki Shimada, Ken Yokoyama, Toshihiko Kurita, Tsuneo Katsuyama, Takeshi Kawasaki, Koichi Takaba, Hiroyasu Kageyama
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Publication number: 20050289395Abstract: A computer-readable recording medium recording a program capable of accurately analyzing the cause of a performance fault at the very end point of a client system, server system, etc. Outgoing and incoming packets are captured during execution of a communication application to measure a round trip time, and a communication window size of the transmitting source is estimated based on the captured incoming packets. A throughput estimate is calculated from the round trip time and the communication window size, and the estimated value and actual measured value of the throughput are displayed on, for example, a display, together with various other communication parameters including the communication window size and the round trip time, whereby the cause of a performance fault can be accurately located by quantitative analysis.Type: ApplicationFiled: December 23, 2004Publication date: December 29, 2005Applicant: Fujitsu LimitedInventors: Tsuneo Katsuyama, Masanobu Morinaga, Hideaki Miyazaki, Yuji Nomura, Takeshi Yasuie, Noriyuki Fukuyama, Masaaki Wakamoto, Satoshi Nojima
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Patent number: 6757255Abstract: A TCP communications performance measuring device 2 obtains an effective bandwidth (a transfer speed) representing performance in TCP communications, wherein performance indexes or both of a round trip time and a maximum segment size which are obtained based on TCP communications variable-length packets transmitted and received pursuant to a TCP (Transmission Control Protocol) defined as protocol of a transport layer of the OSI Reference model, and any one of an average congestion window size, a packet discard rate and a packet discard event rate. The measuring device 2 therefore includes a packet monitoring unit, a performance index detecting unit 22, a session management unit 23, a session management table 24 and a performance calculating unit 25. The measuring device 2 is capable of measuring the performance in the TCP communications on a communications route of a network without specially transmitting the multiplicity of measurement-oriented packets to the network.Type: GrantFiled: July 27, 1999Date of Patent: June 29, 2004Assignee: Fujitsu LimitedInventors: Takeshi Aoki, Shinji Kikuchi, Eiichi Takahashi, Ken Yokoyama, Tsuneo Katsuyama, Tetsuya Okano
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Patent number: 6625147Abstract: A communications network control system includes a packet judging circuit 412 for judging whether a variable-length packet inputted via a network 12 is a control packet CPKT self-addressed and containing control information for network control, or a transfer packet TPKT that should be transferred to other addresses, and a control information management circuit 512 for receiving the control packet judged to be the control packet by the judging circuit via the network, and managing and processing the control information, based on the received control packet.Type: GrantFiled: September 7, 1999Date of Patent: September 23, 2003Assignee: Fujitsu LimitedInventors: Ken Yokoyama, Takeshi Aoki, Eiichi Takahashi, Shinji Kikuchi, Tsuneo Katsuyama
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Publication number: 20020143955Abstract: A packet processing unit and a session managing unit, which are conventionally arranged in a server, are arranged in a network connecting device, and the network connecting device performs a packet relay process based on session management. As a result, the load on a server is reduced, and a process by the server is performed faster.Type: ApplicationFiled: January 28, 2002Publication date: October 3, 2002Applicant: Fujitsu LimitedInventors: Kuniaki Shimada, Ken Yokoyama, Toshihiko Kurita, Tsuneo Katsuyama, Takeshi Kawasaki, Koichi Takaba, Hiroyasu Kageyama
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Patent number: 6428406Abstract: A soft polishing disc with holes is composed of an abrasive member, which is obtained by radially disposing abrasive pieces each composed of a sand paper having abrasive grains coated on a soft base cloth while partially stacking the abrasive pieces and by coupling them with each other by a thermosetting resin, and ventilation holes are formed through the disc. The soft polishing disc with holes can stably grind and polish a workpiece even if it is soft or hard and has a good air ventilation property, maintains an air cooling effect for a long period of time, is difficult to be loaded with chips, increases the heat radiation property of an abrasive surface and makes it to difficult for a workpiece to be burnt.Type: GrantFiled: January 11, 2001Date of Patent: August 6, 2002Assignee: Kantoseito Co., Ltd.Inventors: Tsuneo Katsuyama, Taisei Tsuchiya
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Publication number: 20020037694Abstract: A soft polishing disc with holes is composed of an abrasive member, which is obtained by radially disposing abrasive pieces each composed of a sand paper having abrasive grains coated on a soft base cloth while partially stacking the abrasive pieces and by coupling them with each other by a thermosetting resin, and ventilation holes are formed through the disc. The soft polishing disc with holes can stably grind and polish a workpiece even if it is soft or hard and has a good air ventilation property, maintains an air cooling effect for a long period of time, is difficult to be loaded with chips, increases the heat radiation property of an abrasive surface and makes it to difficult for a workpiece to be burnt.Type: ApplicationFiled: January 11, 2001Publication date: March 28, 2002Inventors: Tsuneo Katsuyama, Taisei Tsuchiya
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Patent number: 6266691Abstract: An electronic conference support system having a structure in which one main common information processing apparatus having a common display unit having a size sufficiently large for attendants to commonly look and some personal information processing apparatuses for permitting each attendant to exclusively create, display and edit information adjacent to each attendant are connected to one another to form a network communication structure through a data communication passage. When a certain attendant acquires an operation right, an information input space is displayed on the personal display unit of the attendant while permitting the attendant to input information. Information inputted to the information input space is, after completed and as an information object, displayed on the common display unit of the common information processing apparatus and the personal display units of all of the personal information processing apparatuses.Type: GrantFiled: December 3, 1996Date of Patent: July 24, 2001Assignee: Fujitsu LimitedInventors: Satoru Watanabe, Souichi Okada, Toshihiro Azami, Jun Kakuta, Tsuneo Katsuyama
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Patent number: 6175874Abstract: A control method and apparatus for distributing packets to nodes in a cluster, while realizing a single system image at the network address level and such as to be able to simply and dynamically change the distribution destination, conditions of distribution, and the like. A pattern matching unit in a relay device receives packets coming from a packet receiving device. The packets have an address which represents a cluster. Using a distribution control table, pattern matching is performed based on the transmission origin address, transmission origin port, destination port and the like of this packet. A hash calculation unit, from the matching result, performs a hash calculation obtaining the argument of a hash function. A destination node extraction unit sets the destination node of the packet based on the hash result, using the distribution control table.Type: GrantFiled: February 9, 1998Date of Patent: January 16, 2001Assignee: Fujitsu LimitedInventors: Yuji Imai, Mitsuhiro Kishimoto, Tsuneo Katsuyama
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Patent number: 5600346Abstract: A multiwindow display control method and apparatus for easily controlling a display of a plurality of groups of windows each group including a plurality of windows. The invention includes plural frame memory control units each storing pixel data to be displayed on one of the windows, a first group number of a group of windows to which the window belongs, and a priority number for identifying a display priority among the windows included in the same group of windows. The invention further provides an outline generating unit for generating a second group number each identifying one of the group of windows; a pixel data arbitration unit for determining a group of windows having the first group number which coincides with the second group number, and for determining a window to be displayed having a highest priority number of the determined group of windows; and a display unit for displaying pixel data of the determined window.Type: GrantFiled: June 19, 1991Date of Patent: February 4, 1997Assignee: Fujitsu LimitedInventors: Hajime Kamata, Tsuneo Katsuyama, Toshimitsu Suzuki, Yu Minakuchi, Katsutoshi Yano