Patents by Inventor Shozo Okasaka
Shozo Okasaka 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: 20180098343Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.Type: ApplicationFiled: November 21, 2017Publication date: April 5, 2018Inventors: Atsushi Sumasu, Shozo Okasaka, Shinsuke Takaoka, Seigo Nakao, Daichi Imamura
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Patent number: 9872310Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.Type: GrantFiled: November 11, 2016Date of Patent: January 16, 2018Assignee: SUN PATENT TRUSTInventors: Atsushi Sumasu, Shozo Okasaka, Shinsuke Takaoka, Seigo Nakao, Daichi Imamura
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Patent number: 9859921Abstract: A low-density parity check convolution code (LDPC-CC) is made, and a signal sequence is sent after being subjected to an error-correcting encodement using the low-density parity check convolution code. In this case, a low-density parity check code of a time-variant period (3g) is created by linear operations of first to 3g-th (letter g designates a positive integer) parity check polynomials and input data.Type: GrantFiled: January 13, 2016Date of Patent: January 2, 2018Assignee: Panasonic CorporationInventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
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Publication number: 20170111850Abstract: In order to shorten the time in which an initial connection is established when switching directivity and then performing the initial connection, a frame timing control unit sets, until detection of an RACH signal, a transmission timing of a transmission frame for transmitting a search signal and a broadcast signal and also sets a reception-start timing for starting the reception of the corresponding RACH signal. A search/broadcast signal generation unit generates the broadcast signal and the search signal including reception-timing information. A beam directivity control unit sets, for a predetermined time starting from the reception-start timing, a directivity pattern such that the directivity is in the same direction as the directivity pattern for the corresponding transmission-timing information, whereby the beam directivity control unit controls a beam directivity operation unit.Type: ApplicationFiled: May 30, 2014Publication date: April 20, 2017Inventors: Shozo OKASAKA, Takayuki SOTOYAMA, Seigo NAKAO
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Publication number: 20170104495Abstract: A transmission apparatus includes an encoder that codes a data sequence with a parity check matrix, wherein the data sequence includes a final information bit sequence and virtual information bits, and outputs the final information bit sequence and a parity sequence, as LDPC codes, and a transmitter that transmits the LDPC codes as a transmission data. A column length of the parity check matrix is longer than a total length of the final information bit sequence and the parity sequence, by a length of the virtual information bits that are set to “0” and are not transmitted. The total length of the final information bit sequence and the parity sequence has a sequence length corresponding to a length from a first column to a determined column of the parity check matrix. The encoder generates the LDPC codes by using the first column to the determined column among one or more column(s) of the parity check matrix.Type: ApplicationFiled: December 21, 2016Publication date: April 13, 2017Inventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
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Publication number: 20170064735Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.Type: ApplicationFiled: November 11, 2016Publication date: March 2, 2017Inventors: Atsushi Sumasu, Shozo Okasaka, Shinsuke Takaoka, Seigo Nakao, Daichi Imamura
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Patent number: 9564923Abstract: A transmission apparatus includes an encoder that codes a data sequence with a parity check matrix, wherein the data sequence includes a final information bit sequence and virtual information bits, and outputs the final information bit sequence and a parity sequence, as LDPC codes, and a transmitter that transmits the LDPC codes as a transmission data. A column length of the parity check matrix is longer than a total length of the final information bit sequence and the parity sequence, by a length of the virtual information bits that are set to “0” and are not transmitted. The total length of the final information bit sequence and the parity sequence has a sequence length corresponding to a length from a first column to a predetermined column of the parity check matrix. The encoder generates the LDPC codes by using the first column to the predetermined column among one or more column(s) of the parity check matrix.Type: GrantFiled: March 22, 2016Date of Patent: February 7, 2017Assignee: Panasonic CorporationInventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
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Patent number: 9532374Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.Type: GrantFiled: March 16, 2016Date of Patent: December 27, 2016Assignee: SUN PATENT TRUSTInventors: Atsushi Sumasu, Shozo Okasaka, Shinsuke Takaoka, Seigo Nakao, Daichi Imamura
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Publication number: 20160248443Abstract: A low-density parity check convolution code (LDPC-CC) is made, and a signal sequence is sent after being subjected to an error-correcting encodement using the low-density parity check convolution code. In this case, a low-density parity check code of a time-variant period (3g) is created by linear operations of first to 3g-th (letter g designates a positive integer) parity check polynomials and input data.Type: ApplicationFiled: January 13, 2016Publication date: August 25, 2016Inventors: Yutaka MURAKAMI, Shutai OKAMURA, Masayuki ORIHASHI, Takaaki KISHIGAMI, Shozo OKASAKA
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Publication number: 20160204807Abstract: A transmission apparatus includes an encoder that codes a data sequence with a parity check matrix, wherein the data sequence includes a final information bit sequence and virtual information bits, and outputs the final information bit sequence and a parity sequence, as LDPC codes, and a transmitter that transmits the LDPC codes as a transmission data. A column length of the parity check matrix is longer than a total length of the final information bit sequence and the parity sequence, by a length of the virtual information bits that are set to “0” and are not transmitted. The total length of the final information bit sequence and the parity sequence has a sequence length corresponding to a length from a first column to a predetermined column of the parity check matrix. The encoder generates the LDPC codes by using the first column to the predetermined column among one or more column(s) of the parity check matrix.Type: ApplicationFiled: March 22, 2016Publication date: July 14, 2016Inventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
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Publication number: 20160198492Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.Type: ApplicationFiled: March 16, 2016Publication date: July 7, 2016Inventors: Atsushi Sumasu, Shozo Okasaka, Shinsuke Takaoka, Seigo Nakao, Daichi Imamura
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Patent number: 9331715Abstract: A transmission apparatus includes an encoder that codes a data sequence with a parity check matrix, wherein the data sequence includes a final information bit sequence and virtual information bits, and outputs the final information bit sequence and a parity sequence, as LDPC codes, and a transmitter that transmits the LDPC codes as a transmission data. A column length of the parity check matrix is longer than a total length of the final information bit sequence and the parity sequence, by a length of the virtual information bits that are set to “0” and are not transmitted. The total length of the final information bit sequence and the parity sequence has a sequence length corresponding to a length from a first column to a predetermined column of the parity check matrix. The encoder generates the LDPC codes by using the first column to the predetermined column among one or more column(s) of the parity check matrix.Type: GrantFiled: September 21, 2015Date of Patent: May 3, 2016Assignee: Panasonic CorporationInventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
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Patent number: 9332568Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.Type: GrantFiled: May 21, 2015Date of Patent: May 3, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICAInventors: Atsushi Sumasu, Shozo Okasaka, Shinsuke Takaoka, Seigo Nakao, Daichi Imamura
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Patent number: 9276611Abstract: A low-density parity check convolution code (LDPC-CC) is made, and a signal sequence is sent after being subjected to an error-correcting encodement using the low-density parity check convolution code. In this case, a low-density parity check code of a time-variant period (3g) is created by linear operations of first to 3g-th (letter g designates a positive integer) parity check polynomials and input data.Type: GrantFiled: April 17, 2014Date of Patent: March 1, 2016Assignee: PANASONIC CORPORATIONInventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
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Patent number: 9271268Abstract: Provided are a wireless transmission device, a wireless reception device, and a bandwidth allocation method for, when non-contiguous bands allocation is performed, improving the frequency resource use efficiency of a system and thereby improving the system performance. RIV decoding unit (106) decodes start RBG# and end RBG# that are indicated by each RIV output from scheduling information decoding unit (104). Allocation boundary setting unit (107) previously adds a predetermined offset to the boundary of each RIV so that the boundaries of the allocations of respective RIVs are different from each other. Based on the start RBG# and end RBG# output from RIV decoding unit (106) and the boundaries of the allocations of respective RIVs output from allocation boundary setting unit (107), transmission bandwidth determination unit (108) determines, as allocated bandwidths, the bandwidths that are indicated by a plurality of RIVs and are not overlapped with each other.Type: GrantFiled: January 7, 2011Date of Patent: February 23, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICAInventors: Takashi Iwai, Akihiko Nishio, Daichi Imamura, Seigo Nakao, Yoshihiko Ogawa, Shozo Okasaka, Masaru Fukuoka
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Publication number: 20160013808Abstract: A transmission apparatus includes an encoder that codes a data sequence with a parity check matrix, wherein the data sequence includes a final information bit sequence and virtual information bits, and outputs the final information bit sequence and a parity sequence, as LDPC codes, and a transmitter that transmits the LDPC codes as a transmission data. A column length of the parity check matrix is longer than a total length of the final information bit sequence and the parity sequence, by a length of the virtual information bits that are set to “0” and are not transmitted. The total length of the final information bit sequence and the parity sequence has a sequence length corresponding to a length from a first column to a predetermined column of the parity check matrix. The encoder generates the LDPC codes by using the first column to the predetermined column among one or more column(s) of the parity check matrix.Type: ApplicationFiled: September 21, 2015Publication date: January 14, 2016Inventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
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Patent number: 9178654Abstract: A transmission apparatus includes an encoder that codes a data sequence with a parity check matrix, wherein the data sequence includes a final information bit sequence and virtual information bits, and outputs the final information bit sequence and a parity sequence, as LDPC codes, and a transmitter that transmits the LDPC codes as a transmission data. A column length of the parity check matrix is longer than a total length of the final information bit sequence and the parity sequence, by a length of the virtual information bits that are set to “0” and are not transmitted. The total length of the final information bit sequence and the parity sequence has a sequence length corresponding to a length from a first column to a predetermined column of the parity check matrix. The encoder generates the LDPC codes by using the first column to the predetermined column among one or more column(s) of the parity check matrix.Type: GrantFiled: October 16, 2014Date of Patent: November 3, 2015Assignee: Panasonic CorporationInventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
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Publication number: 20150257171Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.Type: ApplicationFiled: May 21, 2015Publication date: September 10, 2015Inventors: Atsushi SUMASU, Shozo OKASAKA, Shinsuke TAKAOKA, Seigo NAKAO, Daichi IMAMURA
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Patent number: 9094997Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.Type: GrantFiled: December 26, 2013Date of Patent: July 28, 2015Assignee: PANASONIC INTELLECTUAL PROPERTY OF AMERICAInventors: Atsushi Sumasu, Shozo Okasaka, Shinsuke Takaoka, Seigo Nakao, Daichi Imamura
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Publication number: 20150039974Abstract: An encoder and decoder using LDPC-CC (Low Density Parity Check—Convolutional Codes) is disclosed. In the encoder (200), an encoding rate setting unit (250) sets an encoding rate (s?1)/s (s=z), and an information creating unit (210) sets information including from information Xs,i to information Xz-1,i to zero. A first information computing unit (220-1) receives information X1,i at time point i to compute the X1(D) term of formula (1). A second information computing unit (220-2) receives information X2,i at time point i to compute the X2(D) term of formula (1). A third information computing unit (220-3) receives information X3,i at time point i to compute the X3(D) term of formula (1). A parity computing unit (230) receives parity Pi?1 at time point i?1 to compute the P(D) of formula (1). The exclusive OR of the results of the computation is obtained as parity Pi at time i. Ax.Type: ApplicationFiled: October 16, 2014Publication date: February 5, 2015Inventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka