Patents by Inventor Tetsu Nakajima
Tetsu Nakajima 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: 10244431Abstract: A radio communication method stores a plurality MAC frames for each of a plurality of destinations. The method decides the longest transmission time of transmission times needed to transmit the plurality of MAC frames to each of the plurality of destinations within a fixed period. The method generates a plurality of physical frames for the plurality of destinations to transmit them at the same time by connecting the plurality of MAC frames and adding additional information to each connected MAC frame so as to be a frame length equivalent to a transmission time equal to the longest transmission time.Type: GrantFiled: February 12, 2018Date of Patent: March 26, 2019Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu Nakajima, Tomoko Adachi, Yoriko Utsunomiya, Tomoya Tandai, Masahiro Takagi
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Publication number: 20180176821Abstract: A radio communication method stores a plurality MAC frames for each of a plurality of destinations. The method decides the longest transmission time of transmission times needed to transmit the plurality of MAC frames to each of the plurality of destinations within a fixed period. The method generates a plurality of physical frames for the plurality of destinations to transmit them at the same time by connecting the plurality of MAC frames and adding additional information to each connected MAC frame so as to be a frame length equivalent to a transmission time equal to the longest transmission time.Type: ApplicationFiled: February 12, 2018Publication date: June 21, 2018Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu Nakajima, Tomoko Adachi, Yoriko Utsunomiya, Tomoya Tandai, Masahiro Takagi
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Patent number: 10004069Abstract: There is provided a wireless terminal including: a frame allocating unit performing an allocation process on a frame to be transmitted to another wireless terminal; a first communication unit assigning a sequence number to the allocated frame and transmitting the frame to the another wireless terminal through a first channel or a first mode; a second communication unit assigning a sequence number to the allocated frame and transmitting the frame to the another wireless terminal through a second channel or a second mode, wherein the allocating unit allocates the frame to one of the first and second communication units; when changing the transmission source of the frame from the one to the other communication unit, a change notification frame including a transmission starting sequence number is transmitted to the another wireless terminal; and the frame allocating unit switches the allocation destination of the frame from the one to the other.Type: GrantFiled: May 19, 2015Date of Patent: June 19, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tomoko Adachi, Tetsu Nakajima
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Patent number: 9930572Abstract: A radio communication method stores a plurality MAC frames for each of a plurality of destinations. The method decides the longest transmission time of transmission times needed to transmit the plurality of MAC frames to each of the plurality of destinations within a fixed period. The method generates a plurality of physical frames for the plurality of destinations to transmit them at the same time by connecting the plurality of MAC frames and adding additional information to each connected MAC frame so as to be a frame length equivalent to a transmission time equal to the longest transmission time.Type: GrantFiled: February 23, 2017Date of Patent: March 27, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu Nakajima, Tomoko Adachi, Yoriko Utsunomiya, Tomoya Tandai, Masahiro Takagi
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Publication number: 20170163514Abstract: A radio communication method stores a plurality MAC frames for each of a plurality of destinations. The method decides the longest transmission time of transmission times needed to transmit the plurality of MAC frames to each of the plurality of destinations within a fixed period. The method generates a plurality of physical frames for the plurality of destinations to transmit them at the same time by connecting the plurality of MAC frames and adding additional information to each connected MAC frame so as to be a frame length equivalent to a transmission time equal to the longest transmission time.Type: ApplicationFiled: February 23, 2017Publication date: June 8, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu NAKAJIMA, Tomoko Adachi, Yoriko Utsunomiya, Tomoya Tandai, Masahiro Takagi
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Patent number: 9648590Abstract: A communication device includes a receiver, a transmitter and an interruption module. The receiver receives an allocation signal indicating a first period usable by the communication device and a second period usable by a plurality of communication devices including the communication device. The transmitter transmits a transmission signal in the first period. If the transmission of the transmission signal is completed within the first period, the interruption module interrupts at least a part of power supply to the receiver in the second period. If the transmission of the transmission signal is not completed within the first period and directivity of radio waves used by a second communication device includes a direction of the communication device in a communication period allocated before the second period, the transmitter transmits the transmission signal in the second period.Type: GrantFiled: August 29, 2013Date of Patent: May 9, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu Nakajima, Tomoko Adachi, Kiyoshi Toshimitsu, Tatsuma Hirano, Yoriko Utsunomiya
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Patent number: 9622112Abstract: A radio communication method stores a plurality MAC frames for each of a plurality of destinations. The method decides the longest transmission time of transmission times needed to transmit the plurality of MAC frames to each of the plurality of destinations within a fixed period. The method generates a plurality of physical frames for the plurality of destinations to transmit them at the same time by connecting the plurality of MAC frames and adding additional information to each connected MAC frame so as to be a frame length equivalent to a transmission time equal to the longest transmission time.Type: GrantFiled: July 14, 2015Date of Patent: April 11, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu Nakajima, Tomoko Adachi, Yoriko Utsunomiya, Tomoya Tandai, Masahiro Takagi
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Publication number: 20150319645Abstract: A radio communication method stores a plurality MAC frames for each of a plurality of destinations. The method decides the longest transmission time of transmission times needed to transmit the plurality of MAC frames to each of the plurality of destinations within a fixed period. The method generates a plurality of physical frames for the plurality of destinations to transmit them at the same time by connecting the plurality of MAC frames and adding additional information to each connected MAC frame so as to be a frame length equivalent to a transmission time equal to the longest transmission time.Type: ApplicationFiled: July 14, 2015Publication date: November 5, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu NAKAJIMA, Tomoko Adachi, Yoriko Utsunomiya, Tomoya Tandai, Masahiro Takagi
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Publication number: 20150264685Abstract: There is provided a wireless terminal including: a frame allocating unit performing an allocation process on a frame to be transmitted to another wireless terminal; a first communication unit assigning a sequence number to the allocated frame and transmitting the frame to the another wireless terminal through a first channel or a first mode; a second communication unit assigning a sequence number to the allocated frame and transmitting the frame to the another wireless terminal through a second channel or a second mode, wherein the allocating unit allocates the frame to one of the first and second communication units; when changing the transmission source of the frame from the one to the other communication unit, a change notification frame including a transmission starting sequence number is transmitted to the another wireless terminal; and the frame allocating unit switches the allocation destination of the frame from the one to the other.Type: ApplicationFiled: May 19, 2015Publication date: September 17, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tomoko ADACHI, Tetsu NAKAJIMA
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Patent number: 9094863Abstract: A radio communication method stores a plurality MAC frames for each of a plurality of destinations. The method decides the longest transmission time of transmission times needed to transmit the plurality of MAC frames to each of the plurality of destinations within a fixed period. The method generates a plurality of physical frames for the plurality of destinations to transmit them at the same time by connecting the plurality of MAC frames and adding additional information to each connected MAC frame so as to be a frame length equivalent to a transmission time equal to the longest transmission time.Type: GrantFiled: December 24, 2008Date of Patent: July 28, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Tetsu Nakajima, Tomoko Adachi, Yoriko Utsunomiya, Tomoya Tandai, Masahiro Takagi
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Patent number: 9042313Abstract: There is provided a wireless terminal including: a frame allocating unit performing an allocation process on a frame to be transmitted to another wireless terminal; a first communication unit assigning a sequence number to the allocated frame and transmitting the frame to the another wireless terminal through a first channel or a first mode; a second communication unit assigning a sequence number to the allocated frame and transmitting the frame to the another wireless terminal through a second channel or a second mode, wherein the allocating unit allocates the frame to one of the first and second communication units; when changing the transmission source of the frame from the one to the other communication unit, a change notification frame including a transmission starting sequence number is transmitted to the another wireless terminal; and the frame allocating unit switches the allocation destination of the frame from the one to the other.Type: GrantFiled: July 15, 2011Date of Patent: May 26, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tomoko Adachi, Tetsu Nakajima
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Patent number: 8786414Abstract: A communication device includes a first receiver, a second receiver, a communication module, and a controller. The first receiver receives an operation signal from a remote controller. The second receiver receives a radio signal with a specific frequency. A power consumption of the second receiver is less than that of the first receiver. The communication module is capable of transmitting the operation signal to a first communication device. The controller controls power supply to the first receiver and the communication module and starts power supply to the first receiver and the communication module if the second receiver receives the radio signal. The communication module turns to a standby state if the first receiver does not receive the operation signal after start of power supply to the first receiver.Type: GrantFiled: February 17, 2012Date of Patent: July 22, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Tetsu Nakajima, Tomoko Adachi, Kiyoshi Toshimitsu
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Publication number: 20130343254Abstract: A communication device includes a receiver, a transmitter and an interruption module. The receiver receives an allocation signal indicating a first period usable by the communication device and a second period usable by a plurality of communication devices including the communication device. The transmitter transmits a transmission signal in the first period. If the transmission of the transmission signal is completed within the first period, the interruption module interrupts at least a part of power supply to the receiver in the second period. If the transmission of the transmission signal is not completed within the first period and directivity of radio waves used by a second communication device includes a direction of the communication device in a communication period allocated before the second period, the transmitter transmits the transmission signal in the second period.Type: ApplicationFiled: August 29, 2013Publication date: December 26, 2013Applicant: Kabushiki Kaisha ToshibaInventors: Tetsu NAKAJIMA, Tomoko ADACHI, Kiyoshi TOSHIMITSU, Tatsuma HIRANO, Yoriko UTSUNOMIYA
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Patent number: 8548392Abstract: A communication device includes a receiver, a transmitter and an interruption module. The receiver receives an allocation signal indicating a first period usable by the communication device and a second period usable by a plurality of communication devices including the communication device. The transmitter transmits a transmission signal in the first period. If the transmission of the transmission signal is completed within the first period, the interruption module interrupts at least a part of power supply to the receiver in the second period. If the transmission of the transmission signal is not completed within the first period and directivity of radio waves used by a second communication device includes a direction of the communication device in a communication period allocated before the second period, the transmitter transmits the transmission signal in the second period.Type: GrantFiled: August 17, 2012Date of Patent: October 1, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Tetsu Nakajima, Tomoko Adachi, Kiyoshi Toshimitsu, Tatsuma Hirano, Yoriko Utsunomiya
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Patent number: 8503339Abstract: A wireless communication apparatus performs bi-directional communication with an initiator. The apparatus is allocated an allocation period for data transmission from the initiator. The apparatus includes means for generating a first physical frame including an acknowledgement frame with respect to data received from the initiator, and generating a second physical frame in which a plurality of transmission data frames addressed to the initiator are aggregated. The apparatus also includes means for transmitting the first physical frame at a first transmission rate and the second physical frame at a second transmission rate, during the allocation period.Type: GrantFiled: November 19, 2010Date of Patent: August 6, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Tetsu Nakajima, Tomoko Adachi, Masahiro Takagi, Tomoya Tandai, Yoriko Utsunomiya, Toshihisa Nabetani
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Publication number: 20120315962Abstract: A communication device includes a receiver, a transmitter and an interruption module. The receiver receives an allocation signal indicating a first period usable by the communication device and a second period usable by a plurality of communication devices including the communication device. The transmitter transmits a transmission signal in the first period. If the transmission of the transmission signal is completed within the first period, the interruption module interrupts at least a part of power supply to the receiver in the second period. If the transmission of the transmission signal is not completed within the first period and directivity of radio waves used by a second communication device includes a direction of the communication device in a communication period allocated before the second period, the transmitter transmits the transmission signal in the second period.Type: ApplicationFiled: August 17, 2012Publication date: December 13, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu NAKAJIMA, Tomoko Adachi, Kiyoshi Toshimitsu, Tatsuma Hirano, Yoriko Utsunomiya
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Patent number: 8289987Abstract: A wireless communication system includes first and second wireless terminals capable of performing transmission by at least one of a first transmission scheme and a second transmission scheme. The first wireless terminal performs transmission of a first frame to the second wireless terminal by using the second transmission scheme. The second wireless terminal communicates with the first wireless terminal to notify the first wireless terminal of information associated with a status of the reception of the first frame transmitted from the first wireless terminal by using the first transmission scheme.Type: GrantFiled: September 24, 2008Date of Patent: October 16, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Tomoko Adachi, Masahiro Takagi, Tomoya Tandai, Tetsu Nakajima, Yoriko Utsunomiya, Yasuyuki Nishibayashi, Daisuke Takeda
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Patent number: 8284753Abstract: A wireless communication apparatus including a main queue to store MAC frames, a plurality of subqueues related to the main queue and used to control retransmission of the MAC frame, each of the subqueues having different priority for transmission of the MAC frame, respectively, an extracting device configured to extract the MAC frame from the main queue on the basis of a destination and the priority, and distribute the extracted MAC frame to one of the plurality of subqueues for each priority, and an aggregating device configured to extract MAC frames from the plurality of subqueues to form a MAC super frame.Type: GrantFiled: March 14, 2008Date of Patent: October 9, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Yasuyuki Nishibayashi, Masahiro Takagi, Tomoko Adachi, Tomoya Tandai, Tetsu Nakajima, Yoriko Utsunomiya
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Patent number: 8274992Abstract: A physical frame is generated and transmitted to a destination terminal. In this physical frame, one of a data frame, an acknowledgement frame, and an acknowledgement request frame, and a transmission permission frame which is used in place of a normal Ack frame associated with a delayed Block Ack, and permits the destination terminal to perform piggyback transmission, are aggregated.Type: GrantFiled: December 23, 2009Date of Patent: September 25, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Yasuyuki Nishibayashi, Masahiro Takagi, Tomoko Adachi, Tetsu Nakajima, Tomoya Tandai, Yoriko Utsunomiya
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Patent number: 8271059Abstract: According to one embodiment, a communication device includes a receiver, a transmitter and an interruption module. The receiver receives an allocation signal indicating a first period usable by the communication device and a second period usable by a plurality of communication devices including the communication device. The transmitter transmits a transmission signal in the first period. If the transmission of the transmission signal is completed within the first period, the interruption module interrupts at least a part of power supply to the receiver in the second period. If the transmission of the transmission signal is not completed within the first period and directivity of radio waves used by a second communication device includes a direction of the communication device in a communication period allocated before the second period, the transmitter transmits the transmission signal in the second period.Type: GrantFiled: December 15, 2011Date of Patent: September 18, 2012Assignee: Kabushiki Kaisha TOSHIBAInventors: Tetsu Nakajima, Tomoko Adachi, Kiyoshi Toshimitsu, Tatsuma Hirano, Yoriko Utsunomiya