Patents by Inventor Yoriko Utsunomiya
Yoriko Utsunomiya 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: 7869418Abstract: A communication apparatus includes a receiving device configured to receive one physical frame in which a plurality of MAC frames are aggregated. This physical frame includes one acknowledgement request frame for the plurality of MAC frames. The apparatus includes an acknowledgement frame forming device configured to form an acknowledgement frame representing reception statuses of the plurality of MAC frames in response to the acknowledgement request frame. The apparatus also includes a transmitting device configured to transmit the acknowledgement frame. This acknowledgement frame includes a compressed acknowledgement frame representing an acknowledgement bitmap having a size equal to a maximum number of MSDUs (MAC Service Data Units) when one MPDU (MAC Protocol Data Unit) corresponds to one MSDU.Type: GrantFiled: October 27, 2009Date of Patent: January 11, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Yasuyuki Nishibayashi, Masahiro Takagi, Tomoko Adachi, Tomoya Tandai, Tetsu Nakajima, Yoriko Utsunomiya
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Patent number: 7852791Abstract: 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: August 30, 2007Date of Patent: December 14, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Tetsu Nakajima, Tomoko Adachi, Masahiro Takagi, Tomoya Tandai, Yoriko Utsunomiya, Toshihisa Nabetani
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Patent number: 7848330Abstract: A communication apparatus includes a receiving device configured to receive a physical frame in which a plurality of MAC frames, each having a sequence number, are aggregated. A reception buffer which stores MAC frames of the physical frame received by the receiving device. A determination device determines whether or not the first MAC frame in the physical frame received by the receiving device has been successfully received. A reception buffer management device determines, when the first MAC frame has been successfully received, a MAC frame to be forwarded to an upper layer, on the basis of the sequence number of the first MAC frame, and extracts the MAC frame from the reception buffer.Type: GrantFiled: September 11, 2009Date of Patent: December 7, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Yasuyuki Nishibayashi, Masahiro Takagi, Tomoko Adachi, Tomoya Tandai, Tetsu Nakajima, Yoriko Utsunomiya
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Publication number: 20100232452Abstract: A physical frame is constructed, the physical frame including a medium access control super-frame payload which in turn includes a plurality of medium access control frames. With respect to the constructed physical frame, virtual carrier sense information is set in the plurality of medium access control frame so that a result of carrier sense is identical to another by virtual carrier sense based on the plurality of medium access control frames in the medium access control super-frame payload. The physical frame in which the virtual carrier sense information has been set is transmitted to a destined communication apparatus.Type: ApplicationFiled: May 26, 2010Publication date: September 16, 2010Applicant: Kabushiki Kaisha ToshibaInventors: Masahiro Takagi, Yasuyuki Nishibayashi, Yoriko Utsunomiya
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Patent number: 7773601Abstract: A wireless communication apparatus is disclosed. A transmitting device transmits a first aggregation frame in which first transmission data frames are aggregated. A measuring device measures a number value of retransmission of each of the first transmission data frames. A storage stores a limiting value of the number value of retransmission. A determination device determines whether the number value of retransmission of each of the first transmission data frames exceeds the limiting value. A transmission buffer buffers the first transmission data frames for which it is determined that the number value of retransmission does not exceed the limiting value, and discards the first transmission data frames for which it is determined that the number value of retransmission exceeds the limiting value, of the first transmission data frames. A retransmitting device retransmits the first aggregation frame in which the first transmission data frames buffered in the transmission buffer are aggregated.Type: GrantFiled: May 4, 2007Date of Patent: August 10, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Tetsu Nakajima, Tomoko Adachi, Masahiro Takagi, Tomoya Tandai, Yoriko Utsunomiya, Yasuyuki Nishibayashi
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Publication number: 20100189056Abstract: 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: ApplicationFiled: December 23, 2009Publication date: July 29, 2010Inventors: Yasuyuki NISHIBAYASHI, Masahiro Takagi, Tomoko Adachi, Tetsu Nakajima, Tomoya Tandai, Yoriko Utsunomiya
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Patent number: 7746861Abstract: A communication apparatus includes a receiving device configured to receive a physical frame in which a plurality of MAC frames, each having a sequence number, are aggregated. A reception buffer which stores MAC frames of the physical frame received by the receiving device. A determination device determines whether or not the first MAC frame in the physical frame received by the receiving device has been successfully received. A reception buffer management device determines, when the first MAC frame has been successfully received, a MAC frame to be forwarded to an upper layer, on the basis of the sequence number of the first MAC frame, and extracts the MAC frame from the reception buffer.Type: GrantFiled: August 11, 2005Date of Patent: June 29, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Yasuyuki Nishibayashi, Masahiro Takagi, Tomoko Adachi, Tomoya Tandai, Tetsu Nakajima, Yoriko Utsunomiya
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Patent number: 7743310Abstract: A generation device generates a frame to be transmitted to a destination communication apparatus. The frame includes a first separation field, a first MAC protocol data unit (MPDU) following the first separation field, a second separation field following the first MPDU, a third separation field following the second separation field, and a third MPDU following the third separation field. The second separation field includes length information set to a value of zero to indicate no second MPDU directly follows the second separation field. The first MPDU includes a first MAC header, a first data field, and a first frame check sequence (FCS). The first FCS is for detecting an error occurred in at least the first data field. The third MPDU includes a third MAC header, a third data field, and a third FCS. The third FCS is for detecting an error occurred in at least the third data field.Type: GrantFiled: November 27, 2009Date of Patent: June 22, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Yasuyuki Nishibayashi, Masahiro Takagi, Tomoko Adachi, Tetsu Nakajima, Yoriko Utsunomiya, Tomoya Tandai
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Patent number: 7738441Abstract: A communication apparatus includes a receiving device configured to receive one physical frame in which a plurality of MAC frames are aggregated. This physical frame includes one acknowledgement request frame for the plurality of MAC frames. The apparatus includes an acknowledgement frame forming device configured to form an acknowledgement frame representing reception statuses of the plurality of MAC frames in response to the acknowledgement request frame. The apparatus also includes a transmitting device configured to transmit the acknowledgement frame. This acknowledgement frame includes a compressed acknowledgement frame representing an acknowledgement bitmap having a size equal to a maximum number of MSDUs (MAC Service Data Units) when one MPDU (MAC Protocol Data Unit) corresponds to one MSDU.Type: GrantFiled: August 10, 2005Date of Patent: June 15, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Yasuyuki Nishibayashi, Masahiro Takagi, Tomoko Adachi, Tomoya Tandai, Tetsu Nakajima, Yoriko Utsunomiya
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Patent number: 7706408Abstract: A physical frame is constructed, the physical frame including a medium access control super-frame payload which in turn includes a plurality of medium access control frames. With respect to the constructed physical frame, virtual carrier sense information is set in the plurality of medium access control frame so that a result of carrier sense is identical to another by virtual carrier sense based on the plurality of medium access control frames in the medium access control super-frame payload. The physical frame in which the virtual carrier sense information has been set is transmitted to a destined communication apparatus.Type: GrantFiled: September 27, 2006Date of Patent: April 27, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Masahiro Takagi, Yasuyuki Nishibayashi, Yoriko Utsunomiya
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Patent number: 7701962Abstract: A wireless communication apparatus for performing wireless communication using a first channel having a first frequency bandwidth, and a second channel formed of both the first channel and a second communication channel, the second communication channel having a frequency bandwidth equal to the first frequency bandwidth. A first generation of a first declaration frame for declaring occupation of the first channel for a specified period, and a second generation of a second declaration frame for declaring occupation of the second communication channel for a specified period after the first declaration frame are generated and transmitted. Transmission timings are set so that the first and second declaration frames are transmitted at the highest priority of all the other frames.Type: GrantFiled: August 11, 2005Date of Patent: April 20, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Yoriko Utsunomiya, Tomoko Adachi, Masahiro Takagi, Tetsu Nakajima, Tomoya Tandai, Yasuyuki Nishibayashi
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Patent number: 7697491Abstract: A wireless communication apparatus includes a transmitting device configured to transmit burst data of a plurality of transmission data, a receiving device configured to receive an acknowledgement status of the burst data transmitted by the transmitting device, a retransmitting device configured to control the transmitting device to retransmit any of the plurality of transmission data contained in the burst data, in accordance with the acknowledgement status received by the receiving device, and a retransmission limiting device configured to limit the retransmission for each frame exchange sequence of the burst data.Type: GrantFiled: May 24, 2005Date of Patent: April 13, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Tetsu Nakajima, Tomoko Adachi, Masahiro Takagi, Tomoya Tandai, Yoriko Utsunomiya, Yasuyuki Nishibayashi
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Patent number: 7697561Abstract: A communication apparatus includes a frame generating device configured to generate a physical frame containing, of a plurality of MAC frames to be transmitted, a MAC frame which requires acknowledgement indicating that the frame is received by a receiving side, a MAC frame which does not require the acknowledgement, and identification information which indicates necessity/unnecessity of acknowledgement for each MAC frame depending on whether each MAC frame requires acknowledgement, and a transmitting device configured to transmit the physical frame generated by the frame generating device.Type: GrantFiled: March 2, 2005Date of Patent: April 13, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Yasuyuki Nishibayashi, Masahiro Takagi, Tomoko Adachi, Tetsu Nakajima, Yoriko Utsunomiya
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Publication number: 20100074277Abstract: A generation device generates a frame to be transmitted to a destination communication apparatus. The frame includes a first separation field, a first MAC protocol data unit (MPDU) following the first separation field, a second separation field following the first MPDU, a third separation field following the second separation field, and a third MPDU following the third separation field. The second separation field includes length information set to a value of zero to indicate no second MPDU directly follows the second separation field. The first MPDU includes a first MAC header, a first data field, and a first frame check sequence (FCS). The first FCS is for detecting an error occurred in at least the first data field. The third MPDU includes a third MAC header, a third data field, and a third FCS. The third FCS is for detecting an error occurred in at least the third data field.Type: ApplicationFiled: November 27, 2009Publication date: March 25, 2010Inventors: Yasuyuki NISHIBAYASHI, Masahiro TAKAGI, Tomoko ADACHI, Tetsu NAKAJIMA, Yoriko UTSUNOMIYA, Tomoya TANDAI
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Patent number: 7680148Abstract: A communication apparatus includes a receiving device configured to receive one physical frame in which a plurality of MAC frames are aggregated. This physical frame includes one acknowledgement request frame for the plurality of MAC frames. The apparatus includes an acknowledgement frame forming device configured to form an acknowledgement frame representing reception statuses of the plurality of MAC frames in response to the acknowledgement request frame. The apparatus also includes a transmitting device configured to transmit the acknowledgement frame. This acknowledgement frame includes a compressed acknowledgement frame representing an acknowledgement bitmap having a size equal to a maximum number of MSDUs (MAC Service Data Units) when one MPDU (MAC Protocol Data Unit) corresponds to one MSDU.Type: GrantFiled: March 25, 2008Date of Patent: March 16, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Yasuyuki Nishibayashi, Masahiro Takagi, Tomoko Adachi, Tomoya Tandai, Tetsu Nakajima, Yoriko Utsunomiya
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Patent number: 7675893Abstract: A physical frame is constructed, the physical frame including a medium access control super-frame payload which in turn includes a plurality of medium access control frames. With respect to the constructed physical frame, virtual carrier sense information is set in the plurality of medium access control frame so that a result of carrier sense is identical to another by virtual carrier sense based on the plurality of medium access control frames in the medium access control super-frame payload. The physical frame in which the virtual carrier sense information has been set is transmitted to a destined communication apparatus.Type: GrantFiled: September 3, 2008Date of Patent: March 9, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Masahiro Takagi, Yasuyuki Nishibayashi, Yoriko Utsunomiya
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Publication number: 20100046540Abstract: A communication apparatus includes a receiving device configured to receive one physical frame in which a plurality of MAC frames are aggregated. This physical frame includes one acknowledgement request frame for the plurality of MAC frames. The apparatus includes an acknowledgement frame forming device configured to form an acknowledgement frame representing reception statuses of the plurality of MAC frames in response to the acknowledgement request frame. The apparatus also includes a transmitting device configured to transmit the acknowledgement frame. This acknowledgement frame includes a compressed acknowledgement frame representing an acknowledgement bitmap having a size equal to a maximum number of MSDUs (MAC Service Data Units) when one MPDU (MAC Protocol Data Unit) corresponds to one MSDU.Type: ApplicationFiled: October 27, 2009Publication date: February 25, 2010Inventors: Yasuyuki NISHIBAYASHI, Masahiro Takagi, Tomoko Adachi, Tomoya Tandai, Tetsu Nakajima, Yoriko Utsunomiya
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Publication number: 20100046518Abstract: A physical frame is constructed, the physical frame including a medium access control super-frame payload which in turn includes a plurality of medium access control frames. With respect to the constructed physical frame, virtual carrier sense information is set in the plurality of medium access control frame so that a result of carrier sense is identical to another by virtual carrier sense based on the plurality of medium access control frames in the medium access control super-frame payload. The physical frame in which the virtual carrier sense information has been set is transmitted to a destined communication apparatus.Type: ApplicationFiled: November 5, 2009Publication date: February 25, 2010Applicant: Kabushiki Kaisha ToshibaInventors: Masahiro Takagi, Yasuyuki Nishibayashi, Yoriko Utsunomiya
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Publication number: 20100046437Abstract: A communication apparatus includes a receiving device configured to receive one physical frame in which a plurality of MAC frames are aggregated. This physical frame includes one acknowledgement request frame for the plurality of MAC frames. The apparatus includes an acknowledgement frame forming device configured to form an acknowledgement frame representing reception statuses of the plurality of MAC frames in response to the acknowledgement request frame. The apparatus also includes a transmitting device configured to transmit the acknowledgement frame. This acknowledgement frame includes a compressed acknowledgement frame representing an acknowledgement bitmap having a size equal to a maximum number of MSDUs (MAC Service Data Units) when one MPDU (MAC Protocol Data Unit) corresponds to one MSDU.Type: ApplicationFiled: October 27, 2009Publication date: February 25, 2010Inventors: Yasuyuki Nishibayashi, Masahiro Takagi, Tomoko Adachi, Tomoya Tandai, Tetsu Nakajima, Yoriko Utsunomiya
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Patent number: 7664129Abstract: A wireless communication apparatus includes a carrier sense device which determines whether or not the first channel satisfies a specific condition of the determination of an idle state, and an occupation/release control device which performs control to make the first physical layer protocol processing device generate and transmit a first frame which declares that the first channel will be occupied for a first predetermined period by virtual carrier sense, when the specific condition of the determination of the idle state is satisfied, and perform control to make the second physical layer protocol processing device generate and transmit a second frame which declares that the second channel will be occupied for a second predetermined period by virtual carrier sense.Type: GrantFiled: March 4, 2005Date of Patent: February 16, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Masahiro Takagi, Tomoko Adachi, Tetsu Nakajima, Yoriko Utsunomiya, Yasuyuki Nishibayashi