Patents by Inventor Akinori Hirukawa
Akinori Hirukawa 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: 8989108Abstract: In retransmission processing due to a failure of transmission of data packets, a plurality of data packets are simultaneously transmitted between two STAs by utilizing multiple wireless channels and MIMO, and the number of idle channels and the number of retransmission packets are compared. Then, when both of the numbers are different or only when the number of idle channels is larger than the number of retransmission packets, the retransmission packets are reconstructed according to the number of idle channels, and the reconstructed retransmission packets are simultaneously transmitted by using the idle channels.Type: GrantFiled: May 16, 2011Date of Patent: March 24, 2015Assignee: Nippon Telegraph and Telephone CorporationInventors: Kengo Nagata, Tomoaki Kumagai, Shinya Otsuki, Kazuyoshi Saito, Satoru Aikawa, Atsushi Ohta, Akinori Hirukawa
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Patent number: 8989219Abstract: When a transmission rate of each of lines that transmit data simultaneously between two STAs by using a plurality of radio channels and/or MIMO can be set independently, one data frame is fragmented in accordance with the transmission rates of the respective lines so as to generate a plurality of data packets having the same packet time length and data sizes equal to or smaller than a maximum data size. Those data packets are transmitted simultaneously by using a plurality of radio channels, or one radio channel and MIMO, or a plurality of radio channels and MIMO.Type: GrantFiled: April 18, 2011Date of Patent: March 24, 2015Assignee: Nippon Telegraph and Telephone CorporationInventors: Kengo Nagata, Tomoaki Kumagai, Shinya Otsuki, Kazuyoshi Saito, Satoru Aikawa, Akinori Hirukawa, Atsushi Ohta
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Publication number: 20110216728Abstract: In retransmission processing due to a failure of transmission of data packets, a plurality of data packets are simultaneously transmitted between two STAs by utilizing multiple wireless channels and MIMO, and the number of idle channels and the number of retransmission packets are compared. Then, when both of the numbers are different or only when the number of idle channels is larger than the number of retransmission packets, the retransmission packets are reconstructed according to the number of idle channels, and the reconstructed retransmission packets are simultaneously transmitted by using the idle channels.Type: ApplicationFiled: May 16, 2011Publication date: September 8, 2011Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kengo Nagata, Tomoaki Kumagai, Shinya Otsuki, Kazuyoshi Saito, Satoru Aikawa, Atsushi Ohta, Akinori Hirukawa
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Publication number: 20110194517Abstract: When a transmission rate of each of lines that transmit data simultaneously between two STAs by using a plurality of radio channels and/or MIMO can be set independently, one data frame is fragmented in accordance with the transmission rates of the respective lines so as to generate a plurality of data packets having the same packet time length and data sizes equal to or smaller than a maximum data size. Those data packets are transmitted simultaneously by using a plurality of radio channels, or one radio channel and MIMO, or a plurality of radio channels and MIMO.Type: ApplicationFiled: April 18, 2011Publication date: August 11, 2011Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kengo Nagata, Tomoaki Kumagai, Shinya Otsuki, Kazuyoshi Saito, Satoru Aikawa, Akinori Hirukawa, Atsushi Ohta
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Patent number: 7974243Abstract: In retransmission processing due to a failure of transmission of data packets, a plurality of data packets are simultaneously transmitted between two STAs by utilizing multiple wireless channels and MIMO, and the number of idle channels and the number of retransmission packets are compared. Then, when both of the numbers are different or only when the number of idle channels is larger than the number of retransmission packets, the retransmission packets are reconstructed according to the number of idle channels, and the reconstructed retransmission packets are simultaneously transmitted by using the idle channels.Type: GrantFiled: June 18, 2004Date of Patent: July 5, 2011Assignee: Nippon Telegraph and Telephone CorporationInventors: Kengo Nagata, Tomoaki Kumagai, Shinya Otsuki, Kazuyoshi Saito, Satoru Aikawa, Atsushi Ohta, Akinori Hirukawa
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Patent number: 7953115Abstract: When a transmission rate of each of lines that transmit data simultaneously between two STAs by using a plurality of radio channels and/or MIMO can be set independently, one data frame is fragmented in accordance with the transmission rates of the respective lines so as to generate a plurality of data packets having the same packet time length and data sizes equal to or smaller than a maximum data size. Those data packets are transmitted simultaneously by using a plurality of radio channels, or one radio channel and MIMO, or a plurality of radio channels and MIMO.Type: GrantFiled: June 18, 2004Date of Patent: May 31, 2011Assignee: Nippon Telegraph and Telephone CorporationInventors: Kengo Nataga, Tomoaki Kumagai, Shinya Otsuki, Kazuyoshi Saito, Satoru Aikawa, Akinori Hirukawa, Atsushi Ohta
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Patent number: 7813317Abstract: Data packets are transmitted between two STAs capable of using plural radio channels and MIMO together, by using idle channels and MIMO. When at least one idle channel has been detected, plural data packets are generated in the same number as the sum of MIMO numbers of the respective idle channels, in which the data packets are generated from one or plural data frames, and plural data packets having the same packet time length are transmitted simultaneously between the two STAs by using the idle channels and MIMO.Type: GrantFiled: June 18, 2004Date of Patent: October 12, 2010Assignee: Nippon Telegraph and Telephone CorporationInventors: Kengo Nagata, Tomoaki Kumagai, Shinya Otsuki, Kazuyoshi Saito, Satoru Aikawa, Atsushi Ohta, Akinori Hirukawa, Yasuhiko Inoue
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Patent number: 7400616Abstract: A plurality of data packets that contain sequence numbers, respectively, are transmitted simultaneously between two STAs by using a wireless channel and MIMO. An STA receiving the plurality of data packets transmitted simultaneously by using MIMO generates a single ACK packet containing information that corresponds to a sequence number of each data packet successfully received, and transmits the single ACK packet to a transmit-side STA without using MIMO. Thus, a ratio of successful ACK packet receptions to total receptions can be increased. An effect of improving throughput achieved by simultaneous transmission can also be ensured.Type: GrantFiled: June 18, 2004Date of Patent: July 15, 2008Assignee: Nippon Telegraph and Telephone CorporationInventors: Kazuyoshi Saito, Tomoaki Kumagai, Shinya Otsuki, Kengo Nagata, Satoru Aikawa, Atsushi Ohta, Akinori Hirukawa
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Publication number: 20060171353Abstract: In retransmission processing due to a failure of transmission of data packets, a plurality of data packets are simultaneously transmitted between two STAs by utilizing multiple wireless channels and MIMO, and the number of idle channels and the number of retransmission packets are compared. Then, when both of the numbers are different or only when the number of idle channels is larger than the number of retransmission packets, the retransmission packets are reconstructed according to the number of idle channels, and the reconstructed retransmission packets are simultaneously transmitted by using the idle channels.Type: ApplicationFiled: June 18, 2004Publication date: August 3, 2006Applicant: NIppon Telegraph and Telephone CorporationInventors: Kengo Nagata, Tomoaki Kumagai, Shinya Otsuki, Kazuyoshi Saito, Satoru Aikawa, Atsushi Ohta, Akinori Hirukawa
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Publication number: 20060139201Abstract: When a transmission rate of each of lines that transmit data simultaneously between two STAs by using a plurality of radio channels and/or MIMO can be set independently, one data frame is fragmented in accordance with the transmission rates of the respective lines so as to generate a plurality of data packets having the same packet time length and data sizes equal to or smaller than a maximum data size. Those data packets are transmitted simultaneously by using a plurality of radio channels, or one radio channel and MIMO, or a plurality of radio channels and MIMO.Type: ApplicationFiled: June 18, 2004Publication date: June 29, 2006Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kengo Nagata, Tomoaki Kumagai, Shinya Otsuki, Kazuyoshi Saito, Satoru Aikawa, Akinori Hirukawa, Atsushi Ohta
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Publication number: 20060087998Abstract: A plurality of data packets that contain sequence numbers, respectively, are transmitted simultaneously between two STAs by using a wireless channel and MIMO. An STA receiving the plurality of data packets transmitted simultaneously by using MIMO generates a single ACK packet containing information that corresponds to a sequence number of each data packet successfully received, and transmits the single ACK packet to a transmit-side STA without using MIMO. Thus, a ratio of successful ACK packet receptions to total receptions can be increased. An effect of improving throughput achieved by simultaneous transmission can also be ensured.Type: ApplicationFiled: June 18, 2004Publication date: April 27, 2006Applicant: NIPPON TELEGRAPH AND TELEPHONE CORP.Inventors: Kazuyoshi Saito, Tomoaki Kumagai, Shinya Otsuki, Kengo Nagata, Satoru Aikawa, Atsushi Ohta, Akinori Hirukawa