Patents by Inventor Yukio Nakano
Yukio Nakano 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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Publication number: 20020038300Abstract: A parallel database system retrieval method and system for transferring from database operation servers to a front end server only those data items that are used in subsequent processing, thereby shortening the query time when the unused data are massive. The invention allows an initial retrieval query to transfer only location information about the target data from a database operation server to the front end server. Using the location information the invention permits a subsequent query to get variable-bound location information so that the latter query will retrieve a desired sub-data item according to the acquired location information and dictionary information about the sub-data item locations within the data.Type: ApplicationFiled: December 3, 2001Publication date: March 28, 2002Inventors: Morihiro Iwata, Masashi Tsuchida, Yukio Nakano, Norihiro Hara
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Publication number: 20020024699Abstract: An optical transmission system accomplishes optical transmission to a long distance by combining a multiplexing line terminal with optical amplifiers, linear repeaters, and regenerators with optical amplifiers combined together. The system also accomplishes the optical transmission to a short distance by directly connecting the linear terminals therebetween, with an electric-to-optic converter replaced by an electric-to-optic converter having a semiconductor amplifier, with an optic-to-electric converter by an optic-to-electric converter having an avalanche photodiode as light receiver, an with no use of any optical booster amplifier and optical preamplifier in the multiplexing line terminal. With these, the optical transmission system can be easily constructed depending on the transmission distance required.Type: ApplicationFiled: July 19, 2001Publication date: February 28, 2002Applicant: Hitachi, Ltd.Inventors: Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki, Yukio Nakano, Masahiro Takatori, Toru Kazawa, Shinya Sasaki, Ryoji Takeyari, Hiroyuki Nakano
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Patent number: 6327585Abstract: A request accepting server accepts a processing request of data of a predetermined type, analyzes the request, and allocates a process corresponding to the request to either one of the request accepting server and at least one database processing server. A handle is a control block to manage a storage area of data as a processing target and has a server in which the processing target data has been stored and information regarding its storing position. When the processing target data corresponding to the processing request is processed in accordance with the processing request, the request accepting server executes a process according to the processing request by using a handle regarding the processing target data. When an entity of the processing target data is necessary, the entity of the processing target data is obtained on the basis of the handle and is processed.Type: GrantFiled: September 27, 1999Date of Patent: December 4, 2001Assignee: Hitachi, Ltd.Inventors: Yukio Nakano, Masashi Tsuchida, Masato Asami, Morihiro Iwata, Norihiro Hara, Yoshito Kamegi
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Publication number: 20010018686Abstract: A request accepting server accepts a processing request of data of a predetermined type, analyzes the request, and allocates a process corresponding to the request to either one of the request accepting server and at least one database processing server. A handle is a control block to manage a storage area of data as a processing target and has a server in which the processing target data has been stored and information regarding its storing position. When the processing target data corresponding to the processing request is processed in accordance with the processing request, the request accepting server executes a process according to the processing request by using a handle regarding the processing target data. When an entity of the processing target data is necessary, the entity of the processing target data is obtained on the basis of the handle and is processed.Type: ApplicationFiled: March 14, 2001Publication date: August 30, 2001Applicant: Hitachi, Ltd.Inventors: Yukio Nakano, Masashi Tsuchida, Masato Asami, Morihiro Iwata, Norihiro Hara, Yoshito Kamegt
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Publication number: 20010014888Abstract: A database management system for executing database operations in parallel by a plurality of nodes and a query processing method for it are described. The database management system contains a decision management node for deciding a distribution node for retrieving information so as to analyze a query received from an application program, generate a processing procedure for processing the query, and execute the process and a join node for sorting, merging, and joining the information retrieved by the distribution node. When the query process is executed, the distribution node decided by the decision management node retrieves the information to be processed and the join node decided by the decision management node also obtains the result for the query from the retrieved information. The query result is outputted from an output node and transferred to the application program.Type: ApplicationFiled: March 16, 2001Publication date: August 16, 2001Applicant: Hitachi, Ltd.Inventors: Masashi Tsuchida, Yukio Nakano, Nobuo Kawamura, Kazuyoshi Negishi, Shunichi Torii
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Publication number: 20010013032Abstract: In a database management system including a request reception server and a plurality of execution servers, each having a plug-in program module incorporated by a user, the request reception server analyzes a processing request from the user to determine whether or not the plurality of execution servers require currently unidentified input parameters when executing external functions in their plug-in modules, based on a definition information table created from descriptions of interface specifications for the plug-in program modules. When it is determined that the execution servers require such input parameters, an external function in the plug-in program module in the request reception server is executed to previously acquire the unidentified input parameters.Type: ApplicationFiled: February 6, 2001Publication date: August 9, 2001Inventors: Susumu Kobayashi, Yoichi Yamamoto, Masashi Tsuchida, Yukio Nakano, Norihiro Hara, Yoshito Kamegi
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Patent number: 6266169Abstract: An optical transmission system accomplishes optical transmission over a long distance by combining a multiplexing line terminal with optical amplifiers, linear repeaters, and regenerators with optical amplifiers combined together. The system also accomplishes the optical transmission over a short distance by directly connecting the linear terminals therebetween, with an electric-to-optic converter replaced by an electric-to-optic converter having a semiconductor amplifier, with an optic-to-electric converter by an optic-to-electric converter having an avalanche photodiode as light receiver, and with no use of any optical booster amplifier and optical preamplifier in the multiplexing line terminal. With these, the optical transmission system can be easily constructed depending on the transmission distance required.Type: GrantFiled: October 1, 1999Date of Patent: July 24, 2001Assignee: Hitachi, Ltd.Inventors: Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki, Yukio Nakano, Masahiro Takatori, Toru Kazawa, Shinya Sasaki, Ryoji Takeyari, Hiroyuki Nakano
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Patent number: 6256621Abstract: A database management system for executing database operations in parallel by a plurality of nodes and a query processing method are described. The database management system contains a decision management node for deciding a distribution node for retrieving information so as to analyze a query received from an application program, generate a processing procedure for processing the query, and execute the process, and a join node for sorting, merging, and joining the information retrieved by the distribution node. When the query process is executed, the distribution node decided by the decision management node retrieves the information to be processed and the join node decided by the decision management node also obtains the result for the query from the retrieved information. The query result is outputted from an output node and transferred to the application program.Type: GrantFiled: November 3, 1999Date of Patent: July 3, 2001Assignee: Hitachi, Ltd.Inventors: Masashi Tsuchida, Yukio Nakano, Nobuo Kawamura, Kazuyoshi Negishi, Shunichi Torii
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Publication number: 20010001002Abstract: In a synchronous multiplex network including a plurality of multiplex transmission apparatuses, an overhead is passed through intervening multiplex transmission apparatuses such that administration and maintenance operation information is transmitted and received through the overhead between arbitrary multiplex transmission apparatuses. The multiplex transmission apparatus receives a multiplexed signal comprising a payload having a plurality of main signals multiplexed therein and overhead bytes including a plurality of administration and maintenance operation information, performs termination processing for the administration and maintenance operation information and transmission processing for the payload, thereafter converts the multiplexed signal into a different multiplexed signal comprising a payload which has been processed for transmission and a plurality of administration and maintenance operation information, and transmits the different multiplexed signal.Type: ApplicationFiled: December 6, 2000Publication date: May 10, 2001Inventors: Toshiki Sugawara, Masaki Ohira, Yukio Nakano, Takashi Mori
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Patent number: 6212516Abstract: In a database management system including a request reception server and a plurality of execution servers, each having a plug-in program module incorporated by a user, the request reception server analyzes a processing request from the user to determine whether or not the plurality of execution servers require currently unidentified input parameters when executing external functions in their plug-in modules, based on a definition information table created from descriptions of interface specifications for the plug-in program modules. When it is determined that the execution servers require such input parameters, an external function in the plug-in program module in the request reception server is executed to previously acquire the unidentified input parameters.Type: GrantFiled: October 28, 1999Date of Patent: April 3, 2001Assignee: Hitachi, Ltd.Inventors: Susumu Kobayashi, Yoichi Yamamoto, Masashi Tsuchida, Yukio Nakano, Norihiro Hara, Yoshito Kamegi
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Patent number: 6169754Abstract: In a synchronous multiplex network including a plurality of multiplex transmission apparatuses, an overhead is passed through intervening multiplex transmission apparatuses such that administration and maintenance operation information is transmitted and received through the overhead between arbitrary multiplex transmission apparatuses. The multiplex transmission apparatus receives a multiplexed signal comprising a payload having a plurality of main signals multiplexed therein and overhead bytes including a plurality of administration and maintenance operation information, performs termination processing for the administration and maintenance operation information and transmission processing for the payload, thereafter converts the multiplexed signal into a different multiplexed signal comprising a payload which has been processed for transmission and a plurality of administration and maintenance operation information, and transmits the different multiplexed signal.Type: GrantFiled: May 27, 1997Date of Patent: January 2, 2001Assignee: Hitachi, Ltd.Inventors: Toshiki Sugawara, Masaki Ohira, Yukio Nakano, Takashi Mori
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Patent number: 6144633Abstract: The present invention provides a network in which the installation of working lines may be enabled based on the required traffic and the high speed switching of the transmission lines may be realized, as well as a transmission equipment used for that network and a method of control thereof.The transmission equipment comprises an APS byte transmitter/receiver for exchanging information on failures with adjacent transmission equipment through a protection line, a monitor for monitoring anomalies on a plurality of the working lines, a Network Table for storing data indicating network structure, a processing unit for determining working lines to be switched based on the data stored in the Network Table and for processing APS bytes.APS bytes are allocated with the working line number, its priority, and the source node number of switching signal.Type: GrantFiled: April 22, 1997Date of Patent: November 7, 2000Assignee: Hitachi, Ltd.Inventors: Hiroki Ikeda, Toshiki Sugawara, Yukio Nakano
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Patent number: 6094440Abstract: A multiplex type transmitting apparatus is arranged to have a plurality of slow signal receive/transmit sections for accommodating a counterpart for a SONET system or an SDH system, a multiplex separation converting section, and a receive/transmit section for a SONET system or SDH system fast signal.Type: GrantFiled: June 26, 1997Date of Patent: July 25, 2000Assignee: Hitachi, Ltd.Inventors: Toshiki Sugawara, Yukio Nakano, Masaki Ohira, Takashi Mori
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Patent number: 6076085Abstract: In a parallel database system having an execution device on a front end side and a plurality of execution devices on a database operation side (hereinafter referred to as the "divided data side"), the front end side analyzes a definition statement of a routine such as a function or a procedure inputted from a user to create routine execution process instructions for executing the routine. Simultaneously, the front end side determines whether or not a database operation statement is contained in the routine, and creates check information indicative of the determination result. The front end side analyzes a query statement inputted from the user to create a first query execution process instruction to be executed on the front end side and a second query execution process instruction to be executed on the divided data side.Type: GrantFiled: February 23, 1998Date of Patent: June 13, 2000Assignee: Hitachi, Ltd.Inventors: Morihiro Iwata, Masashi Tsuchida, Yukio Nakano, Yoshito Kamegi
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Patent number: 6067654Abstract: An ATM switch including ECC encoder circuits each for generating, for an ATM cell as an information symbol, an ECC check symbol and for adding the ECC check symbol thereto, cell partitioning circuits each for subdividing an information field of an ATM cell into N partial cells, for subdividing a check symbol field into M partial cells, and for assigning an identical routing tag to the obtained partial cells (N+M) partial cell switches for respectively routing the (N+M) partial cells in an independent fashion based on the routing tag, and ECC decoder circuits for receiving the (N+M) partial cells thus routed and for achieving an error correction on the received partial cells.Type: GrantFiled: July 12, 1999Date of Patent: May 23, 2000Assignee: Hitachi, Ltd.Inventors: Yukio Nakano, Takahiko Kozaki, Shinobu Gohara, Yoshihiro Ashi
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Patent number: 6026394Abstract: A database management system for executing database operations in parallel by a plurality of nodes and a query processing method are described. The database management system contains a decision management node for deciding a distribution node for retrieving information so as to analyze a query received from an application program, generate a processing procedure for processing the query, and execute the process, and a join node for sorting, merging, and joining the information retrieved by the distribution node. When the query process is executed, the distribution node decided by the decision management node retrieves the information to be processed and the join node decided by the decision management node also obtains the result for the query from the retrieved information. The query result is outputted from an output node and transferred to the application program.Type: GrantFiled: September 4, 1998Date of Patent: February 15, 2000Assignee: Hitachi, Ltd.Inventors: Masashi Tsuchida, Yukio Nakano, Nobuo Kawamura, Kazuyoshi Negishi, Shunichi Torii
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Patent number: 6018405Abstract: An optical transmission system accomplishes optical transmission over a long distance by combining a multiplexing line terminal with optical amplifiers, linear repeaters, and regenerators with optical amplifiers combined together. The system also accomplishes the optical transmission over a short distance by directly connecting the linear terminals therebetween, with an electric-to-optic converter replaced by an electric-to-optic converter having a semiconductor amplifier, with an optic-toelectric converter by an optic-to-electric converter having an avalanche photodiode as light receiver, and with no use of any optical booster amplifier and optical preamplifier in the multiplexing line terminal. With these, the optical transmission system can be easily constructed depending on the transmission distance required.Type: GrantFiled: February 5, 1999Date of Patent: January 25, 2000Assignee: Hitachi, Ltd.Inventors: Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki, Yukio Nakano, Masahiro Takatori, Toru Kazawa, Shinya Sasaki, Ryoji Takeyari, Hiroyuki Nakano
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Patent number: 6005699Abstract: An optical transmission system accomplishes optical transmission to a long distance by combining a multiplexing line terminal with optical amplifiers, linear repeaters, and regenerators with optical amplifiers combined together. The system also accomplishes the optical transmission to a short distance by directly connecting the linear terminals therebetween, with an electric-to-optic converter replaced by an electric-to-optic converter having a semiconductor amplifier, with an optic-to-electric converter by an optic-to-electric converter having an avalanche photodiode as light receiver, an with no use of any optical booster amplifier and optical preamplifier in the multiplexing line terminal. With these, the optical transmission system can be easily constructed depending on the transmission distance required.Type: GrantFiled: September 11, 1997Date of Patent: December 21, 1999Assignee: Hitachi, Ltd.Inventors: Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki, Yukio Nakano, Masahiro Takatori, Toru Kazawa, Shinya Sasaki, Ryoji Takeyari, Hiroyuki Nakano
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Patent number: 5983386Abstract: An ATM switch including ECC encoder circuits each for generating, for an ATM cell as an information symbol, an ECC check symbol and for adding the ECC check symbol thereto, cell partitioning circuits each for subdividing an information field of an ATM cell into N partial cells, for subdividing a check symbol field into M partial cells, and for assigning an identical routing tag to the obtained partial cells (N+M) partial cell switches for respectively routing the (N+M) partial cells in an independent fashion based on the routing tag, and ECC decoder circuits for receiving the (N+M) partial cells thus routed and for achieving an error correction on the received partial cells.Type: GrantFiled: June 1, 1998Date of Patent: November 9, 1999Assignee: Hitachi, Ltd.Inventors: Yukio Nakano, Takahiko Kozaki, Shinobu Gohara, Yoshihiro Ashi
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Patent number: 5983213Abstract: A request accepting server accepts a processing request of data of a predetermined type, analyzes the request, and allocates a process corresponding to the request to either one of the request accepting server and at least one database processing server. A handle is a control block to manage a storage area of data as a processing target and has a server in which the processing target data has been stored and information regarding its storing position. When the processing target data corresponding to the processing request is processed in accordance with the processing request, the request accepting server executes a process according to the processing request by using a handle regarding the processing target data. When an entity of the processing target data is necessary, the entity of the processing target data is obtained on the basis of the handle and is processed.Type: GrantFiled: November 21, 1997Date of Patent: November 9, 1999Assignee: Hitachi, Ltd.Inventors: Yukio Nakano, Masashi Tsuchida, Masato Asami, Morihiro Iwata, Norihiro Hara, Yoshito Kamegi