Patents by Inventor Yoshiaki Sone
Yoshiaki Sone 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: 10756819Abstract: An encoding device includes an encoding unit, DA converters, light sources, intensity modulators, and wavelength multiplexers. The encoding unit adds (NM/2) to an encoded signal having a negative minimum value in a range of the encoded signal among encoded signals of N channels of (NM+1) values obtained by calculating an inner product of a Hadamard matrix of N rows and N columns and a matrix having elements of N intensity signals of (M+1) values. The DA converters of the channels convert the encoded signals of the channels from digital signals into electrical analog signals. The light sources output light of wavelengths for use in the channels. The light intensity modulators of the channels intensity-modulate the light output from the light sources with the encoded signals converted into the electrical analog signals by the DA converters. The wavelength multiplexer outputs a wavelength-multiplexed signal obtained by wavelength-multiplexing the light intensity-modulated by the light intensity modulators.Type: GrantFiled: April 7, 2020Date of Patent: August 25, 2020Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shuto Yamamoto, Akira Masuda, Yoshiaki Sone, Mitsunori Fukutoku
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Publication number: 20200244369Abstract: An encoding device includes an encoding unit, DA converters, light sources, intensity modulators, and wavelength multiplexers. The encoding unit adds (NM/2) to an encoded signal having a negative minimum value in a range of the encoded signal among encoded signals of N channels of (NM+1) values obtained by calculating an inner product of a Hadamard matrix of N rows and N columns and a matrix having elements of N intensity signals of (M+1) values. The DA converters of the channels convert the encoded signals of the channels from digital signals into electrical analog signals. The light sources output light of wavelengths for use in the channels. The light intensity modulators of the channels intensity-modulate the light output from the light sources with the encoded signals converted into the electrical analog signals by the DA converters. The wavelength multiplexer outputs a wavelength-multiplexed signal obtained by wavelength-multiplexing the light intensity-modulated by the light intensity modulators.Type: ApplicationFiled: April 7, 2020Publication date: July 30, 2020Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shuto YAMAMOTO, Akira MASUDA, Yoshiaki SONE, Mitsunori FUKUTOKU
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Patent number: 10693562Abstract: An encoding device includes an encoding unit, DA converters, light sources, intensity modulators, and wavelength multiplexers. The encoding unit adds (NM/2) to an encoded signal having a negative minimum value in a range of the encoded signal among encoded signals of N channels of (NM+1) values obtained by calculating an inner product of a Hadamard matrix of N rows and N columns and a matrix having elements of N intensity signals of (M+1) values. The DA converters of the channels convert the encoded signals of the channels from digital signals into electrical analog signals. The light sources output light of wavelengths for use in the channels. The light intensity modulators of the channels intensity-modulate the light output from the light sources with the encoded signals converted into the electrical analog signals by the DA converters. The wavelength multiplexer outputs a wavelength-multiplexed signal obtained by wavelength-multiplexing the light intensity-modulated by the light intensity modulators.Type: GrantFiled: October 16, 2017Date of Patent: June 23, 2020Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shuto Yamamoto, Akira Masuda, Yoshiaki Sone, Mitsunori Fukutoku
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Patent number: 10651945Abstract: An encoding device includes an encoding unit, DA converters, light sources, intensity modulators, and wavelength multiplexers. The encoding unit adds (NM/2) to an encoded signal having a negative minimum value in a range of the encoded signal among encoded signals of N channels of (NM+1) values obtained by calculating an inner product of a Hadamard matrix of N rows and N columns and a matrix having elements of N intensity signals of (M+1) values. The DA converters of the channels convert the encoded signals of the channels from digital signals into electrical analog signals. The light sources output light of wavelengths for use in the channels. The light intensity modulators of the channels intensity-modulate the light output from the light sources with the encoded signals converted into the electrical analog signals by the DA converters. The wavelength multiplexer outputs a wavelength-multiplexed signal obtained by wavelength-multiplexing the light intensity-modulated by the light intensity modulators.Type: GrantFiled: October 16, 2017Date of Patent: May 12, 2020Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shuto Yamamoto, Akira Masuda, Yoshiaki Sone, Mitsunori Fukutoku
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Publication number: 20200052792Abstract: An encoding device includes an encoding unit, DA conveners, light sources, intensity modulators, and wavelength multiplexers. The encoding unit adds (NM/2) to an encoded signal having a negative minimum value in a range of the encoded signal among encoded signals of N channels of (NM+1) values obtained by calculating an inner product of a Hadamard matrix of N rows and N columns and a matrix having elements of N intensity signals of (M+1) values. The DA converters of the channels convert the encoded signals of the channels from digital signals into electrical analog signals. The light sources output light of wavelengths for use in the channels. The light intensity modulators of the channels intensity-modulate the light output from the light sources with the encoded signals converted into the electrical analog signals by the DA converters. The wavelength multiplexer outputs a wavelength-multiplexed signal obtained by wavelength-multiplexing the light intensity-modulated by the light intensity modulators.Type: ApplicationFiled: October 16, 2017Publication date: February 13, 2020Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shuto YAMAMOTO, Akira MASUDA, Yoshiaki SONE, Mitsunori FUKUTOKU
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Patent number: 9479282Abstract: An optical communication apparatus, in the sending side, distributes client signals according to destinations and a communication capacity of each destination, electrical-to-optical converts the distributed signals to optical signals having different center frequencies, and multiplexes the optical signals to output, and in the receiving side, the optical communication apparatus divides the wavelength division multiplexed signal to each wavelength (for each sending source), optical-to-electrical converts the divided optical signals to electrical signals, and multiplexes the electrical signals to output. An add/drop port of an optical route switching apparatus includes an input/output port to the optical communication apparatus, and an optical frequency bandwidth is variable according to an optical spectrum width of the optical signal. A network is constructed by using the optical communication apparatus and the optical route switching apparatus.Type: GrantFiled: April 26, 2012Date of Patent: October 25, 2016Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Masahiko Jinno, Hidehiko Takara, Kazushige Yonenaga, Akira Hirano, Yoshiaki Sone
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Patent number: 9336080Abstract: A transmission system includes: an error correction encoding agent which converts an input data sequence into an encoded data sequence constituted of an error correction code and coded data; a data distribution agent which divides the encoded data sequence from the error correction encoding agent, in a predetermined processing unit and send them to a plurality of transmission routes; a data combining agent which combines signal sequences from the respective transmission routes and restores the encoded data sequence; an error correction decoding agent which applies error correction to and decodes the encoded data sequence from the data combining agent and outputs the input data sequence; and an agent for configuration in which a redundancy in the error correction encoding agent and a degree of splitting of the encoded data sequence in the data distribution agent are set.Type: GrantFiled: July 4, 2012Date of Patent: May 10, 2016Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Akira Hirano, Mitsunori Fukutoku, Yoshiaki Kisaka, Yoshiaki Sone, Akihiro Kadohata, Takafumi Tanaka
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Patent number: 9178645Abstract: A wavelength path reallocation method in a path reallocation apparatus for reallocating a wavelength path set in a communication network, including: a wavelength path designing step in which a wavelength path designing unit designs a reallocation destination wavelength path by performing calculation such that the number of use frequency regions in the communication network becomes smaller than a corresponding value before reallocation; and a wavelength path setting step in which a wavelength path setting unit changes a reallocation target wavelength path to the reallocation destination wavelength path by using free wavelength.Type: GrantFiled: October 21, 2011Date of Patent: November 3, 2015Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Akihiro Kadohata, Akira Hirano, Yoshiaki Sone, Yukio Tsukishima, Takafumi Tanaka
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Patent number: 9154257Abstract: A frequency assignment method for selecting a frequency width used on a route connecting between a start point and an end point when the start point and the end point of an optical signal are supplied in a photonic network including an optical node that includes an optical switch for switching the optical signal without electrically terminating the optical signal is disclosed. The frequency assignment method includes steps of: obtaining a correlation amount of use state of wavelength or frequency between adjacent links by referring to a route calculation result; determining a fixed frequency width or variable frequency width to be set for a communication route based on the correlation amount; and assigning the fixed frequency width or the variable frequency width on the route.Type: GrantFiled: October 24, 2011Date of Patent: October 6, 2015Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Akira Hirano, Yoshiaki Sone, Akihiro Kadohata, Takafumi Tanaka, Shinji Matsuoka
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Patent number: 8964581Abstract: A bandwidth variable communication method is provided that enables effective use of frequency bandwidths in which the bit rate is constant in every optical path. The bandwidth variable communication method includes, when a network management apparatus sets or changes an optical path that passes through plural communication apparatuses, measuring or obtaining an optical signal quality deterioration amount in a route of the optical path; selecting a modulation format in which a spectrum bandwidth is the narrowest from among modulation formats by which transmission is available on conditions of the optical signal quality deterioration amount and a desired bit rate B (bit/s); and exchanging control information between the network management apparatus and a control unit of each communication apparatus on the optical path route. A bandwidth variable communication apparatus receives the control information, and changes a passband based on the received control information.Type: GrantFiled: September 13, 2010Date of Patent: February 24, 2015Assignee: Nippon Telegraph and Telephone CorporationInventors: Hidehiko Takara, Masahiko Jinno, Atsushi Watanabe, Kozicki Bartlomiej, Yoshiaki Sone, Akira Hirano, Takafumi Tanaka
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Publication number: 20140270776Abstract: An optical communication apparatus, in the sending side, distributes client signals according to destinations and a communication capacity of each destination, electrical-to-optical converts the distributed signals to optical signals having different center frequencies, and multiplexes the optical signals to output, and in the receiving side, the optical communication apparatus divides the wavelength division multiplexed signal to each wavelength (for each sending source), optical-to-electrical converts the divided optical signals to electrical signals, and multiplexes the electrical signals to output. An add/drop port of an optical route switching apparatus includes an input/output port to the optical communication apparatus, and an optical frequency bandwidth is variable according to an optical spectrum width of the optical signal. A network is constructed by using the optical communication apparatus and the optical route switching apparatus.Type: ApplicationFiled: April 26, 2012Publication date: September 18, 2014Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Masahiko Jinno, Hidehiko Takara, Kazushige Yonenaga, Akira Hirano, Yoshiaki Sone
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Publication number: 20140108894Abstract: A transmission system comprising: an error correction encoding agent which converts an input data sequence into a coded data sequence constituted of an error correction code and coded data; a data distribution agent which divides encoded data sequence from the error correction encoding agent, in a predetermined processing unit and combines the divided data sequences with a plurality of transmission routes; a data combining agent which combines signal sequences from the respective transmission routes and decodes encoded data sequence; an error correction decoding agent which applies error correction to and decodes encoded data sequence from the data combining agent and outputs the input data sequence; and an agent for configuration in which a redundancy in the error correction encoding agent and a degree of splitting of encoded data sequence in the data distribution agent are set.Type: ApplicationFiled: July 4, 2012Publication date: April 17, 2014Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Akira Hirano, Mitsunori Fukutoku, Yoshiaki Kisaka, Yoshiaki Sone, Akihiro Kadohata, Takafumi Tanaka
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Publication number: 20130216226Abstract: A frequency assignment method for selecting a frequency width used on a route connecting between a start point and an end point when the start point and the end point of an optical signal are supplied in a photonic network including an optical node that includes an optical switch for switching the optical signal without electrically terminating the optical signal is disclosed. The frequency assignment method includes steps of: obtaining a correlation amount of use state of wavelength or frequency between adjacent links by referring to a route calculation result; determining a fixed frequency width or variable frequency width to be set for a communication route based on the correlation amount; and assigning the fixed frequency width or the variable frequency width on the route.Type: ApplicationFiled: October 24, 2011Publication date: August 22, 2013Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Akira Hirano, Yoshiaki Sone, Akihiro Kadohata, Takafumi Tanaka, Shinji Matsuoka
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Publication number: 20130195460Abstract: A wavelength path reallocation method in a path reallocation apparatus for reallocating a wavelength path set in a communication network, including: a wavelength path designing step in which a wavelength path designing unit designs a reallocation destination wavelength path by performing calculation such that the number of use frequency regions in the communication network becomes smaller than a corresponding value before reallocation; and a wavelength path setting step in which a wavelength path setting unit changes a reallocation target wavelength path to the reallocation destination wavelength path by using free wavelength.Type: ApplicationFiled: October 21, 2011Publication date: August 1, 2013Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Akihiro Kadohata, Akira Hirano, Yoshiaki Sone, Yukio Tsukishima, Takafumi Tanaka
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Publication number: 20120224851Abstract: A bandwidth variable communication method is provided that enables effective use of frequency bandwidths in which the bit rate is constant in every optical path. The bandwidth variable communication method includes, when a network management apparatus sets or changes an optical path that passes through plural communication apparatuses, measuring or obtaining an optical signal quality deterioration amount in a route of the optical path; selecting a modulation format in which a spectrum bandwidth is the narrowest from among modulation formats by which transmission is available on conditions of the optical signal quality deterioration amount and a desired bit rate B (bit/s); and exchanging control information between the network management apparatus and a control unit of each communication apparatus on the optical path route. A bandwidth variable communication apparatus receives the control information, and changes a passband based on the received control information.Type: ApplicationFiled: September 13, 2010Publication date: September 6, 2012Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hidehiko Takara, Masahiko Jinno, Atsushi Watanabe, Kozicki Bartlomiej, Yoshiaki Sone, Akira Hirano, Takafumi Tanaka
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Patent number: 7961644Abstract: In a communication system, including a plurality of communication node apparatuses, for establishing a path for communication by exchanging a message among the plurality of communication node apparatuses, before establishing a path, an identifier of a path for which reuse of resources of the path to be established is permitted or inhibited is determined, and the determined identification information is included in a control message so that the path is established. A communication node apparatus in which the path has been established determines availability of reuse of resources the path based on the identification information in the control message. When an event such as failure occurrence, occurrence of resource reuse or dissolution of resource reuse occurs, the communication node apparatus executes path priority change processing, so that priority can be changed such that resource reuse can be performed most efficiently.Type: GrantFiled: October 5, 2007Date of Patent: June 14, 2011Assignee: Nippon Telegraph and Telephone CorporationInventors: Yoshiaki Sone, Wataru Imajyuku, Naohide Nagatsu, Yukio Tsukishima, Kazuhisa Yamada, Atsushi Taniguchi
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Publication number: 20100208584Abstract: In a communication system, including a plurality of communication node apparatuses, for establishing a path for communication by exchanging a message among the plurality of communication node apparatuses, before establishing a path, an identifier of a path for which reuse of resources of the path to be established is permitted or inhibited is determined, and the determined identification information is included in a control message so that the path is established. A communication node apparatus in which the path has been established determines availability of reuse of resources the path based on the identification information in the control message. When an event such as failure occurrence, occurrence of resource reuse or dissolution of resource reuse occurs, the communication node apparatus executes path priority change processing, so that priority can be changed such that resource reuse can be performed most efficiently.Type: ApplicationFiled: October 5, 2007Publication date: August 19, 2010Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yoshiaki Sone, Wataru Imajyuku, Naohide Nagatsu, Yukio Tsukishima, Kazuhisa Yamada, Atsushi Taniguchi
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Patent number: 7420606Abstract: A timing generator, includes: a first memory circuit that stores timing generation information; a first register for holding the timing generation information in the first memory circuit; a first external input part for accessing to the first register so as to rewrite data therein; a selector that selects one of the first memory circuit and the first external input part in order to conduct writing of data in the first register; and a pulse generation part that generates a pulse timing in accordance with the timing generation information held in the first register so as to output a single or a plurality of pulses. A pulse timing required for driving a solid-state imaging device and the like can be generated easily and the timing generation can be rewritten externally.Type: GrantFiled: July 14, 2004Date of Patent: September 2, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Katsumi Takeda, Junji Tokumoto, Yoshiaki Sone, Tsuyoshi Hasuka
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Publication number: 20050012822Abstract: A timing generator, includes: a first memory circuit that stores timing generation information; a first register for holding the timing generation information in the first memory circuit; a first external input part for accessing to the first register so as to rewrite data therein; a selector that selects one of the first memory circuit and the first external input part in order to conduct writing of data in the first register; and a pulse generation part that generates a pulse timing in accordance with the timing generation information held in the first register so as to output a single or a plurality of pulses. A pulse timing required for driving a solid-state imaging device and the like can be generated easily and the timing generation can be rewritten externally.Type: ApplicationFiled: July 14, 2004Publication date: January 20, 2005Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Katsumi Takeda, Junji Tokumoto, Yoshiaki Sone, Tsuyoshi Hasuka
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Patent number: 5371773Abstract: A counter circuit includes counting stages of n bits where n is a natural number. The counter circuit also includes a logic decoding circuit for determining the inputs of the counting stages, a logic circuit for adjusting the number of simultaneous changes so that the number of simultaneous changes of the logic decoding circuit can be made uniform, and a logic circuit for adjusting the load capacitance of the counting stages so that the load capacitance can be made uniform. The counter circuit may also include a test logic circuit for creating a test wave form on the basis of the outputs from the logic circuits for adjusting the number of simultaneous changes and the logic circuits for adjusting the load capacitance. Accordingly, it is possible to detect a failure of the logic circuits for adjusting the number of simultaneous changes and the logic circuits for adjusting the load capacitance which does not effect the counting output.Type: GrantFiled: July 16, 1993Date of Patent: December 6, 1994Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Isao Ihara, Yoshiaki Sone, Shinichi Tashiro, Takeshi Fujita