Patents by Inventor Kensuke Yoshizawa
Kensuke Yoshizawa 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).
-
Patent number: 9025643Abstract: A communication apparatus communicates with another communication apparatus. The communication apparatus includes a first communication unit configured to receive serial data from a first communication apparatus that is serially connected to the communication apparatus; a modulation unit configured to modulate the serial data received by the first communication unit into data other than the serial data to generate transmission data; and a second communication unit configured to perform first unicast transmission which involves transmitting the transmission data by designating a second communication apparatus as a transmission destination and second unicast transmission which involves transmitting the transmission data by designating a third communication apparatus as a transmission destination.Type: GrantFiled: March 31, 2011Date of Patent: May 5, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Toshinari Mouri, Kensuke Yoshizawa, Yuko Inoue, Noriaki Maehara, Maiko Taruki, Shigekiyo Nosaka, Tsuyoshi Yamaguchi
-
Patent number: 8885594Abstract: A communication band is divided into: a beacon period in which every master station transmits a beacon packet in competition with one another; a guaranteed-band period (e.g., a TDMA period or an FDMA period) in which only a specific permitted station is allowed access; and a CSMA period in which every station is allowed access in competition with one another. Plural master stations exchange information of a communication band used in the guaranteed-band period with each other, and based on the respective information, a communication band available to the master station's own communications system in the guaranteed-band period is calculated.Type: GrantFiled: December 27, 2011Date of Patent: November 11, 2014Assignee: Panasonic CorporationInventors: Kensuke Yoshizawa, Shinichiro Ohmi, Tsuyoshi Yamaguchi
-
Patent number: 8705559Abstract: A communication apparatus is connected to a transmission channel capable of transmitting a plurality of kinds of data, each kind of data having different priority levels. The apparatus includes: an acquisition section which acquires each priority information of each kind of data on the transmission channel; and a transmission controller that, when transmitting data having a predetermined priority are transmitted from the communication apparatus, controls a time from a predetermined transmission reference time to a transmission end time of the transmitting data in accordance with the priority information.Type: GrantFiled: November 13, 2008Date of Patent: April 22, 2014Assignee: Panasonic CorporationInventors: Kensuke Yoshizawa, Youhei Koide, Shunsuke Nagayasu, Yoshio Urabe
-
Patent number: 8520599Abstract: A communication bandwidth is divided into a beacon period in which all master stations compete for transmission of a beacon packet, a first carrier sense multiple access (CSMA) period in which only authorized specific stations are allowed to compete for access, and a second CSMA period in which all stations are allowed to compete for access. The master stations exchange information with each other about a communication bandwidth being used in the first CSMA period, thereby calculating a communication bandwidth which can be used by each communication system in the first CSMA period, based on the information.Type: GrantFiled: May 2, 2011Date of Patent: August 27, 2013Assignee: Panasonic CorporationInventors: Shinichiro Ohmi, Kensuke Yoshizawa, Tsuyoshi Yamaguchi
-
Patent number: 8406250Abstract: A medium access control method is provided in which a control station transmits one specific frame to terminal stations, thereby arranging a schedule of a data transmission time of the control station and each of the terminal stations and allowing a time zone unused by a station for data transmission to be allocated to another station. The control station transmits a schedule frame having defined therein a time occupied by each of the terminal stations, thereby reducing overhead. Also, the completion of the preceding communication performed by another station is detected, thereby effectively using an idle time of a medium and improving transmission efficiency.Type: GrantFiled: September 1, 2010Date of Patent: March 26, 2013Assignee: Panasonic CorporationInventors: Gou Kuroda, Akio Kurobe, Koji Ikeda, Kensuke Yoshizawa
-
Patent number: 8374193Abstract: A communication method for performing a communication among a plurality of communication devices sharing a communication band, includes a first step of transmitting notification signal during a first period to notify information for arbitrating the communication device capable of performing data transmission during a second period subsequent to the first period, and a second step of transmitting data from the communication device, capable of performing the data transmission during the second period based on the notification signal transmitted during the first period, in specific period in the second period allocated to the data transmitted from the communication device.Type: GrantFiled: December 18, 2009Date of Patent: February 12, 2013Assignee: Panasonic CorporationInventors: Youhei Koide, Kensuke Yoshizawa, Yoshio Urabe
-
Patent number: 8369359Abstract: A communication device for transmitting data to an other communication device via a transmission channel, includes a communication characteristic acquisition section which acquires a communication characteristic of the transmission channel, and a frame length control section which controls a frame length of a communication frame storing the data based on the communication characteristic of the transmission channel.Type: GrantFiled: January 16, 2010Date of Patent: February 5, 2013Assignee: Panasonic CorporationInventors: Kensuke Yoshizawa, Taisuke Konishi, Atsushi Narita, Takayoshi Koyama
-
Publication number: 20130022135Abstract: A communication apparatus communicates with another communication apparatus. The communication apparatus includes a first communication unit configured to receive serial data from a first communication apparatus that is serially connected to the communication apparatus; a modulation unit configured to modulate the serial data received by the first communication unit into data other than the serial data to generate transmission data; and a second communication unit configured to perform first unicast transmission which involves transmitting the transmission data by designating a second communication apparatus as a transmission destination and second unicast transmission which involves transmitting the transmission data by designating a third communication apparatus as a transmission destination.Type: ApplicationFiled: March 31, 2011Publication date: January 24, 2013Applicant: PANASONIC CORPORATIONInventors: Toshinari Mouri, Kensuke Yoshizawa, Yuko Inoue, Noriaki Maehara, Maiko Taruki, Shigekiyo Nosaka, Tsuyoshi Yamaguchi
-
Publication number: 20120099559Abstract: A communication band is divided into: a beacon period in which every master station transmits a beacon packet in competition with one another; a guaranteed-band period (e.g., a TDMA period or an FDMA period) in which only a specific permitted station is allowed access; and a CSMA period in which every station is allowed access in competition with one another. Plural master stations exchange information of a communication band used in the guaranteed-band period with each other, and based on the respective information, a communication band available to the master station's own communications system in the guaranteed-band period is calculated.Type: ApplicationFiled: December 27, 2011Publication date: April 26, 2012Inventors: Kensuke YOSHIZAWA, Shinichiro Ohmi, Tsuyoshi Yamaguchi
-
Patent number: 8160090Abstract: A communication apparatus improves the throughput of a whole communication system while performing contention distributed control which provides equality of a transmission chance by observing a medium occupation state. The communication apparatus includes a back-off process section for performing, using a contention window, a regular back-off process which is performed at transmission of a transmission frame and a pseudo back-off process which is performed in a pseudo manner when the transmission frame is not transmitted. The communication apparatus also includes a medium information obtaining section for obtaining, by the pseudo back-off process, medium information indicative of a state of the transmission line medium when the transmission frame is not transmitted, and a medium state determination section for determining the state of the transmission line medium using the medium information to obtain determination information.Type: GrantFiled: June 22, 2007Date of Patent: April 17, 2012Assignee: Panasonic CorporationInventors: Kensuke Yoshizawa, Youhei Koide, Toru Yasukawa
-
Patent number: 8155082Abstract: Terminal devices F and G store statistical information related to interference from an external communication system, and notify the stored statistical information to a master station E. The master station E determines the terminal device G as a candidate station for a master station capability handover destination based on collected statistical information. The master station E requests to hand over a master station capability to the terminal device G. If it is determined that the terminal device G accepts handover of the master station capability, the terminal device G starts to act as the master station.Type: GrantFiled: September 30, 2008Date of Patent: April 10, 2012Assignee: Panasonic CorporationInventors: Tsuyoshi Yamaguchi, Shinichiro Ohmi, Kensuke Yoshizawa
-
Patent number: 8107431Abstract: A communication band is divided into: a beacon period in which every master station transmits a beacon packet in competition with one another; a guaranteed-band period (e.g., a TDMA period or an FDMA period) in which only a specific permitted station is allowed access; and a CSMA period in which every station is allowed access in competition with one another. Plural master stations exchange information of a communication band used in the guaranteed-band period with each other, and based on the respective information, a communication band available to the master station's own communications system in the guaranteed-band period is calculated.Type: GrantFiled: January 15, 2008Date of Patent: January 31, 2012Assignee: Panasonic CorporationInventors: Kensuke Yoshizawa, Shinichiro Ohmi, Tsuyoshi Yamaguchi
-
Publication number: 20110206060Abstract: A communication bandwidth is divided into a beacon period in which all master stations compete for transmission of a beacon packet, a first carrier sense multiple access (CSMA) period in which only authorized specific stations are allowed to compete for access, and a second CSMA period in which all stations are allowed to compete for access. The master stations exchange information with each other about a communication bandwidth being used in the first CSMA period, thereby calculating a communication bandwidth which can be used by each communication system in the first CSMA period, based on the information.Type: ApplicationFiled: May 2, 2011Publication date: August 25, 2011Inventors: Shinichiro OHMI, Kensuke YOSHIZAWA, Tsuyoshi YAMAGUCHI
-
Patent number: 7957342Abstract: A communication bandwidth is divided into a beacon period in which all master stations compete for transmission of a beacon packet, a first carrier sense multiple access (CSMA) period in which only authorized specific stations are allowed to compete for access, and a second CSMA period in which all stations are allowed to compete for access. The master stations exchange information with each other about a communication bandwidth being used in the first CSMA period, thereby calculating a communication bandwidth which can be used by each communication system in the first CSMA period, based on the information.Type: GrantFiled: December 4, 2007Date of Patent: June 7, 2011Assignee: Panasonic CorporationInventors: Shinichiro Ohmi, Kensuke Yoshizawa, Tsuyoshi Yamaguchi
-
Publication number: 20100329277Abstract: A medium access control method is provided in which a control station transmits one specific frame to terminal stations, thereby arranging a schedule of a data transmission time of the control station and each of the terminal stations and allowing a time zone unused by a station for data transmission to be allocated to another station. The control station transmits a schedule frame having defined therein a time occupied by each of the terminal stations, thereby reducing overhead. Also, the completion of the preceding communication performed by another station is detected, thereby effectively using an idle time of a medium and improving transmission efficiency.Type: ApplicationFiled: September 1, 2010Publication date: December 30, 2010Inventors: Gou Kuroda, Akio Kurobe, Koji Ikeda, Kensuke Yoshizawa
-
Patent number: 7808965Abstract: A medium access control method is provided in which a control station transmits one specific frame to terminal stations, thereby arranging a schedule of a data transmission time of the control station and each of the terminal stations and allowing a time zone unused by a station for data transmission to be allocated to another station. The control station transmits a schedule frame having defined therein a time occupied by each of the terminal stations, thereby reducing overhead. Also, the completion of the preceding communication performed by another station is detected, thereby effectively using an idle time of a medium and improving transmission efficiency.Type: GrantFiled: October 23, 2007Date of Patent: October 5, 2010Assignee: Panasonic CorporationInventors: Gou Kuroda, Akio Kurobe, Koji Ikeda, Kensuke Yoshizawa
-
Patent number: 7773498Abstract: A transmitting/receiving apparatus includes a packet construction section for dividing continuous data into a plurality of subpackets, and constructing a packet by concatenating the plurality of subpackets; a modulation transmission section for modulating the constructed packet, and transmitting the modulated packet to another apparatus; a training session execution section for checking channel conditions, when a predetermined condition is satisfied, and changing a modulation rule; and a subpacket transmission confirmation section for confirming whether or not a subpacket included in the transmitted packet is transmitted successfully to the transmission destination apparatus.Type: GrantFiled: November 27, 2006Date of Patent: August 10, 2010Assignee: Panasonic CorporationInventors: Akio Kurobe, Koji Ikeda, Gou Kuroda, Kensuke Yoshizawa
-
Patent number: 7768922Abstract: A communication terminal device of the present invention includes: a packet classification section 103 for classifying the packets by stream types and destinations; a packet accumulation section 104-107 for accumulating the packets classified by the packet classification section, so as to be separately stored based on classification by the stream types and the destinations; a QoS control section 113 for determining a transmission start requirement based on a QoS parameter which defines a transmission quality of a stream; a transmission control section 108 for determining whether the transmission start requirement is satisfied; a framing section 109 for generating the frame by concatenating the packets accumulated in the packet accumulation section if it is determined by the transmission control section that the transmission start requirement is satisfied; and a transmission section 110 for transmitting the frame generated by the framing section to a destination communication terminal device.Type: GrantFiled: December 20, 2006Date of Patent: August 3, 2010Assignee: Panasonic CorporationInventors: Koji Ikeda, Akio Kurobe, Gou Kuroda, Kensuke Yoshizawa
-
Publication number: 20100183029Abstract: A communication device for transmitting data to an other communication device via a transmission channel, includes a communication characteristic acquisition section which acquires a communication characteristic of the transmission channel, and a frame length control section which controls a frame length of a communication frame storing the data based on the communication characteristic of the transmission channel.Type: ApplicationFiled: January 16, 2010Publication date: July 22, 2010Applicant: PANASONIC CORPORATIONInventors: Kensuke YOSHIZAWA, Taisuke KONISHI, Atsushi NARITA, Takayoshi KOYAMA
-
Publication number: 20100158039Abstract: A communication method for performing a communication among a plurality of communication devices sharing a communication band, includes a first step of transmitting notification signal during a first period to notify information for arbitrating the communication device capable of performing data transmission during a second period subsequent to the first period, and a second step of transmitting data from the communication device, capable of performing the data transmission during the second period based on the notification signal transmitted during the first period, in specific period in the second period allocated to the data transmitted from the communication device.Type: ApplicationFiled: December 18, 2009Publication date: June 24, 2010Applicant: PANASONIC CORPORATIONInventors: Youhei KOIDE, Kensuke YOSHIZAWA, Yoshio URABE