Patents by Inventor Katsumi Kusama
Katsumi Kusama 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: 10735083Abstract: According to an embodiment, a communication repeater device includes storage and a controller which detects, upon receiving a radio frame including pairs of orthogonal frequency division multiplexing symbols and cyclic prefixes from the radio base station, switching timing between uplink and downlink according to similarity between certain sections of an original radio frame and a time-shifted radio frame. The controller estimates the subsequent switching timing between the uplink and the downlink from the detected switching timing and frame information stored in the storage.Type: GrantFiled: January 22, 2019Date of Patent: August 4, 2020Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATIONInventors: Toshihiro Tango, Katsumi Kusama, Yasutaka Iida
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Patent number: 10644741Abstract: According to an embodiment, a communication apparatus includes a switching unit, a reception unit, a rising edge detector, a symbol detector, and a switching timing detector. The switching unit switches a transmission operation of a signal in the communication apparatus between uplink signal transmission and downlink signal transmission. The reception unit receives a signal transmitted in a time division multiplexing scheme. The rising edge detector detects a rising edge of a received signal received by the reception unit. The symbol detector detects a symbol of a signal indicating a guard time in the time division multiplexing scheme from the received signal. The switching timing detector detects a switching timing of the transmission operation from the switching unit on the basis of detection results of the rising edge detector and the symbol detector.Type: GrantFiled: April 12, 2019Date of Patent: May 5, 2020Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions CorporationInventors: Yasutaka Iida, Katsumi Kusama, Toshihiro Tango, Naohiro Honda
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Publication number: 20190349019Abstract: According to an embodiment, a communication apparatus includes a switching unit, a reception unit, a rising edge detector, a symbol detector, and a switching timing detector. The switching unit switches a transmission operation of a signal in the communication apparatus between uplink signal transmission and downlink signal transmission. The reception unit receives a signal transmitted in a time division multiplexing scheme. The rising edge detector detects a rising edge of a received signal received by the reception unit. The symbol detector detects a symbol of a signal indicating a guard time in the time division multiplexing scheme from the received signal. The switching timing detector detects a switching timing of the transmission operation from the switching unit on the basis of detection results of the rising edge detector and the symbol detector.Type: ApplicationFiled: April 12, 2019Publication date: November 14, 2019Applicants: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Yasutaka IIDA, Katsumi Kusama, Toshihiro Tango, Naohiro Honda
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Publication number: 20190229798Abstract: According to an embodiment, a communication repeater device includes storage and a controller which detects, upon receiving a radio frame including pairs of orthogonal frequency division multiplexing symbols and cyclic prefixes from the radio base station, switching timing between uplink and downlink according to similarity between certain sections of an original radio frame and a time-shifted radio frame. The controller estimates the subsequent switching timing between the uplink and the downlink from the detected switching timing and frame information stored in the storage.Type: ApplicationFiled: January 22, 2019Publication date: July 25, 2019Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATIONInventors: Toshihiro TANGO, Katsumi KUSAMA, Yasutaka IIDA
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Publication number: 20180302801Abstract: A communication system according to one embodiment manages wireless communication via an antenna capable of communicating with a plurality of terminals within a predetermined area. The communication system includes an analyzer and a controller. The analyzer is configured to analyze first information and second information and to specify an uncommunicable terminal from the terminals based on an analysis result. The first information is information registered in advance as positional information of the terminals within the predetermined area. The second information is predetermined information acquirable from the terminals. The uncommunicable terminal is a terminal located at a position where communication with the antenna is not possible.Type: ApplicationFiled: November 19, 2015Publication date: October 18, 2018Inventors: Kohta NAKAMURA, Katsumi KUSAMA, Taichi TASHIRO, Manabu MUKAI, Keiji YAMAMOTO
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Patent number: 9253083Abstract: According to an aspect, a network system comprises a ring-type network, and a master transmission apparatus. The master transmission apparatus includes blocking unit, conversion unit and transmission unit. The blocking unit prohibits relay of the transmission frame received through a first virtual transmission line and a second virtual transmission line. The conversion unit changes transmission path information included in the transmission frame from the first virtual transmission line to the second virtual transmission line. The transmission unit transmits the transmission frame including the transmission path information changed by the conversion unit.Type: GrantFiled: August 14, 2013Date of Patent: February 2, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Katsumi Kusama, Atsushi Takahashi, Taro Takahashi, Yasuhiro Terakado
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Publication number: 20130329549Abstract: According to an aspect, a network system comprises a ring-type network, and a master transmission apparatus. The master transmission apparatus includes blocking unit, conversion unit and transmission unit. The blocking unit prohibits relay of the transmission frame received through a first virtual transmission line and a second virtual transmission line. The conversion unit changes transmission path information included in the transmission frame from the first virtual transmission line to the second virtual transmission line. The transmission unit transmits the transmission frame including the transmission path information changed by the conversion unit.Type: ApplicationFiled: August 14, 2013Publication date: December 12, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Katsumi KUSAMA, Atsushi TAKAHASHI, Taro TAKAHASHI, Yasuhiro TERAKADO
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Publication number: 20120023206Abstract: A system is disclosed that includes a plurality of node devices arranged in sequence; a first node device operable to generate a device count frame with a device count number and transmit the device count frame to the next node device in the sequence; a control device in communication with at least the first node device; wherein each node device is operable to increase the device count number of the device count frame upon receipt of the device count frame and transmit the device count frame to the next node device in sequence; and wherein the control device operable to receive the device count frame to the first node device after each node device has increased the device count number of the device count frame and assign an IP address for each node device, the number of IP addresses determined by the device count number.Type: ApplicationFiled: April 8, 2011Publication date: January 26, 2012Inventors: Katsumi Kusama, Atsushi Takahashi, Taro Takahashi, Shinsuke Watanabe
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Patent number: 6983108Abstract: Optical signals inputted to input ports are split in half by 1×2 optical splitters respectively and the resulting signals are inputted to the input terminals of an optical matrix switch. The optical matrix switch switches between the routes of the individual optical signals and outputs the signal at any of the output ports. This enables the optical signal from the same input port to be outputted at two different output ports, which makes it possible to effect “bridge” at the time of protection switching.Type: GrantFiled: October 18, 2001Date of Patent: January 3, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Mitsuru Sugawara, Takashi Yano, Kyosuke Dobashi, Katsumi Kusama, Sadao Tanikoshi, Kazuhiko Ide, Mitsuru Otani, Masayuki Takami, Mototaka Kitajima
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Publication number: 20020044315Abstract: Optical signals inputted to input ports are split in half by 1×2 optical splitters respectively and the resulting signals are inputted to the input terminals of an optical matrix switch. The optical matrix switch switches between the routes of the individual optical signals and outputs the signal at any of the output ports. This enables the optical signal from the same input port to be outputted at two different output ports, which makes it possible to effect “bridge” at the time of protection switching.Type: ApplicationFiled: October 18, 2001Publication date: April 18, 2002Inventors: Mitsuru Sugawara, Takashi Yano, Kyosuke Dobashi, Katsumi Kusama, Sadao Tanikoshi, Kazuhiko Ide, Mitsuru Otani, Masayuki Takami, Mototaka Kitajima