Patents by Inventor Shigemori Ookawa
Shigemori Ookawa 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).
-
Patent number: 11018996Abstract: A packet transfer device includes a circuit configured to include a first queue to store a first packet classified into a high priority class and a second queue to store a second packet classified into a low priority class, a memory configured to store data configured to indicate possibilities of output for the first packet and the second packet for each time slot, a processor coupled to the memory and configured to control the output of the first packet and the second packet for each time slot according to the data stored in the memory, count a number of discards of the second packet within the second queue in a predetermined cycle, and change the data stored in the memory, when the number of discards is less than a first predetermined value, so as to reduce an output period of the second packet every the time slot.Type: GrantFiled: May 7, 2019Date of Patent: May 25, 2021Assignee: FUJITSU LIMITEDInventors: Norikazu Hikimochi, Ryuichi Kimura, Shigemori Ookawa
-
Publication number: 20190356612Abstract: A packet transfer device includes a circuit configured to include a first queue to store a first packet classified into a high priority class and a second queue to store a second packet classified into a low priority class, a memory configured to store data configured to indicate possibilities of output for the first packet and the second packet for each time slot, a processor coupled to the memory and configured to control the output of the first packet and the second packet for each time slot according to the data stored in the memory, count a number of discards of the second packet within the second queue in a predetermined cycle, and change the data stored in the memory, when the number of discards is less than a first predetermined value, so as to reduce an output period of the second packet every the time slot.Type: ApplicationFiled: May 7, 2019Publication date: November 21, 2019Applicant: FUJITSU LIMITEDInventors: NORIKAZU HIKIMOCHI, Ryuichi KIMURA, SHIGEMORI OOKAWA
-
Publication number: 20170237769Abstract: A packet transfer method includes requesting a terminal apparatus for a physical address corresponding to a logical address of a transmission source of a packet; determining legality of a correspondence relationship between the physical address and the logical address by comparing a physical address indicated by a response from the terminal apparatus with the physical address of the transmission source of the packet; storing a first set of the physical address of the transmission source and the logical address of the transmission source of the packet, when it is determined that the correspondence relationship is legal; when a new packet is received, determining whether a second set of a physical address of a transmission source and a logical address of the transmission source of the new packet coincides with the first set; and transferring the new packet, when it is determined that the second set coincides with the first set.Type: ApplicationFiled: January 30, 2017Publication date: August 17, 2017Applicant: FUJITSU LIMITEDInventors: SHIGEMORI OOKAWA, Yoshinari Akakura, Takanori Sasaki, Takuya OKAMOTO, Tadayuki Nishihashi, TAKUYA MAEDA
-
Publication number: 20170093957Abstract: A transmission apparatus includes a plurality of ports configured to communicate with another transmission apparatus, a storage configured to store a data file, attribute information of the data file, and management information indicating to respond or not to a transfer request for the data file with respect to each of the plurality of ports, respectively, and a processor configured to transmit the attribute information from each of the plurality of ports, and decide whether or not to transmit the data file from a first port of the plurality of ports on the basis of the management information when the first port receives the transfer request from the other transmission apparatus.Type: ApplicationFiled: September 15, 2016Publication date: March 30, 2017Applicant: FUJITSU LIMITEDInventors: Shigemori OOKAWA, Masaki TAKEDA, Takanori SASAKI, Ken TAKASHIMA, Kunitake SUGIMOTO
-
Patent number: 9485167Abstract: A processor determines, when a frame is received, whether a total of current learning numbers stored in a second storage unit has reached a total of maximum learning numbers. The processor identifies in the second storage unit, if it is determined that the total of current learning numbers has reached the total of maximum learning numbers, a first group identifier associated with a lower priority than a priority associated with a reception group identifier contained in the frame. The first group identifier is associated with a first current learning number not less than a first minimum learning number associated with the first group identifier. The processor replaces a first correspondence relationship including the first group identifier with a reception correspondence relationship among a port number of a port at which the frame has been received, a source address contained in the frame, and the reception group identifier.Type: GrantFiled: February 27, 2014Date of Patent: November 1, 2016Assignee: FUJITSU LIMITEDInventor: Shigemori Ookawa
-
Publication number: 20140321470Abstract: A processor determines, when a frame is received, whether a total of current learning numbers stored in a second storage unit has reached a total of maximum learning numbers. The processor identifies in the second storage unit, if it is determined that the total of current learning numbers has reached the total of maximum learning numbers, a first group identifier associated with a lower priority than a priority associated with a reception group identifier contained in the frame. The first group identifier is associated with a first current learning number not less than a first minimum learning number associated with the first group identifier. The processor replaces a first correspondence relationship including the first group identifier with a reception correspondence relationship among a port number of a port at which the frame has been received, a source address contained in the frame, and the reception group identifier.Type: ApplicationFiled: February 27, 2014Publication date: October 30, 2014Applicant: FUJITSU LIMITEDInventor: Shigemori OOKAWA
-
Patent number: 8780701Abstract: A communication apparatus includes a high-priority link configured to transmit one or more high-priority packets that have a priority level greater than or equal to a given level; a plurality of low-priority links that are optically coupled to the same transmission destination as the high-priority link and are configured to transmit one or more low-priority packets that have a priority level less than the given level; a first distribution circuit configured to select the one or more high-priority packets from among input packets and distribute the selected one or more high-priority packets to the high-priority link; and a second distribution circuit configured to individually distribute one or more remaining input packets, which are the input packets that have not been distributed to the high-priority link by the first distribution circuit, to the plurality of low-priority links based on distribution information about distributing packets to the plurality of low-priority links.Type: GrantFiled: May 31, 2012Date of Patent: July 15, 2014Assignee: Fujitsu LimitedInventors: Takuya Maeda, Shigemori Ookawa
-
Patent number: 8462623Abstract: The present invention is comprised for pre-setting bandwidth control information of each user for each of the number of normal physical links which are integrated as a Link Aggregation, recognizing the number of currently normal physical links if a failure, or recovery therefrom, of a physical link which is integrated as the aforementioned Link Aggregation, and carrying out a bandwidth control, for each user traffic, corresponding to the number of the recognized normal physical links by referring to bandwidth control information of each user for each of the number of preset normal physical links, in order to prevent an occurrence of unfairness in usable bandwidth among the users even in the case of a failure occurrence in respective physical links which are logically integrated as a Link Aggregation.Type: GrantFiled: November 7, 2005Date of Patent: June 11, 2013Assignee: Fujitsu LimitedInventors: Tatsuya Abe, Yoshinari Akakura, Yuichi Yamagishi, Norihiro Yoshida, Hirotaka Yamada, Kiyoshi Miyano, Shigemori Ookawa, Norikazu Hikimochi
-
Publication number: 20120307628Abstract: A communication apparatus includes a high-priority link configured to transmit one or more high-priority packets that have a priority level greater than or equal to a given level; a plurality of low-priority links that are optically coupled to the same transmission destination as the high-priority link and are configured to transmit one or more low-priority packets that have a priority level less than the given level; a first distribution circuit configured to select the one or more high-priority packets from among input packets and distribute the selected one or more high-priority packets to the high-priority link; and a second distribution circuit configured to individually distribute one or more remaining input packets, which are the input packets that have not been distributed to the high-priority link by the first distribution circuit, to the plurality of low-priority links based on distribution information about distributing packets to the plurality of low-priority links.Type: ApplicationFiled: May 31, 2012Publication date: December 6, 2012Applicant: FUJITSU LIMITEDInventors: Takuya Maeda, Shigemori Ookawa
-
Publication number: 20070047578Abstract: The present invention is comprised for pre-setting bandwidth control information of each user for each of the number of normal physical links which are integrated as a Link Aggregation, recognizing the number of currently normal physical links if a failure, or recovery therefrom, of a physical link which is integrated as the aforementioned Link Aggregation, and carrying out a bandwidth control, for each user traffic, corresponding to the number of the recognized normal physical links by referring to bandwidth control information of each user for each of the number of preset normal physical links, in order to prevent an occurrence of unfairness in usable bandwidth among the users even in the case of a failure occurrence in respective physical links which are logically integrated as a Link Aggregation.Type: ApplicationFiled: November 7, 2005Publication date: March 1, 2007Inventors: Tatsuya Abe, Yoshinari Akakura, Yuichi Yamagishi, Norihiro Yoshida, Hirotaka Yamada, Kiyoshi Miyano, Shigemori Ookawa, Norikazu Hikimochi