Patents by Inventor Hitoshi Takai
Hitoshi Takai 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: 20150296419Abstract: Provided is a wireless communication system transmitting information to a communication terminal moving through a spot wireless area. In an integrated base station, an external information communication section controls communication with a server. A contents memory section stores contents received from the server. A wireless LAN communication section communicates with the communication terminal. A control section establishes connection with the communication terminal using a first connection not requiring an authentication procedure for connection with the communication terminal, or using a second connection requiring the authentication procedure for connection with the communication terminal.Type: ApplicationFiled: June 23, 2015Publication date: October 15, 2015Inventors: Tsutomu MUKAI, Hitoshi TAKAI
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Patent number: 9100939Abstract: Provided is a wireless communication system transmitting information to a communication terminal moving through a spot wireless area. In an integrated base station, an external information communication section controls communication with a server. A contents memory section stores contents received from the server. A wireless LAN communication section communicates with the communication terminal. A control section establishes connection with the communication terminal using a first connection not requiring an authentication procedure for connection with the communication terminal, or using a second connection requiring the authentication procedure for connection with the communication terminal.Type: GrantFiled: October 28, 2014Date of Patent: August 4, 2015Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Tsutomu Mukai, Hitoshi Takai
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Publication number: 20150043565Abstract: Provided is a wireless communication system transmitting information to a communication terminal moving through a spot wireless area. In an integrated base station, an external information communication section controls communication with a server. A contents memory section stores contents received from the server. A wireless LAN communication section communicates with the communication terminal. A control section establishes connection with the communication terminal using a first connection not requiring an authentication procedure for connection with the communication terminal, or using a second connection requiring the authentication procedure for connection with the communication terminal.Type: ApplicationFiled: October 28, 2014Publication date: February 12, 2015Inventors: Tsutomu MUKAI, Hitoshi TAKAI
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Patent number: 8902871Abstract: Provided is a wireless communication system transmitting information to a communication terminal moving through a spot wireless area. In an integrated base station, an external information communication section controls communication with a server. A contents memory section stores contents received from the server. A wireless LAN communication section communicates with the communication terminal. A control section establishes connection with the communication terminal using a first connection not requiring an authentication procedure for connection with the communication terminal, or using a second connection requiring the authentication procedure for connection with the communication terminal.Type: GrantFiled: September 10, 2012Date of Patent: December 2, 2014Assignee: Panasonic CorporationInventors: Tsutomu Mukai, Hitoshi Takai
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Patent number: 8792599Abstract: The diversity reception device includes an antenna switching unit configured to select and switch to a determined chain number of antennas out of a plurality of antennas; and an antenna interchange control unit configured to control the antenna switching unit to interchange an antenna. The antenna interchange control unit compares a carrier-to-noise ratio measured by a demodulation circuit of a demodulation unit of each chain, controls the antenna switching unit to sequentially switch connection with an antenna of a chain having a lowest carrier-to-noise ratio to connection with antennas connectable to the chain, and interchanges the antenna of the chain having a lowest carrier-to-noise ratio with an antenna estimated to have a highest carrier-to-noise ratio on the basis of the input level measured by the level detection unit or an antenna having a highest input level measured by the level detection unit among the connection-switched antennas.Type: GrantFiled: August 24, 2012Date of Patent: July 29, 2014Assignee: Panasonic CorporationInventors: Hitoshi Takai, Masaki Yamaguchi, Makoto Sekitoh
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Patent number: 8675759Abstract: A wireless transmission system performs multi-station simultaneous transmission of data. The wireless transmission system includes wireless stations for transmitting and receiving data. Transmitter-side wireless stations, a multipath channel, and receiver-side wireless stations constitute a system for path diversity. At least one wireless station among the wireless stations determines, depending on a response packet with respective to a multi-station simultaneous transmission request packet transmitted by itself or other stations, delay amounts from a reference timing during multi-station simultaneous transmission in the wireless transmission system, and symbol waveforms that are a basis for a modulated waveform. A difference between each delay amount is set to be larger than or equal to a predetermined delay resolution for each symbol waveform, and a difference between maximum and minimum values of the delay amounts is set to be smaller than or equal to a predetermined maximum delay.Type: GrantFiled: March 20, 2007Date of Patent: March 18, 2014Assignee: Panasonic CorporationInventors: Hitoshi Takai, Hidetoshi Yamasaki, Hideki Nakahara, Kenji Miyanaga
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Publication number: 20130003643Abstract: A wireless communication system transmits information requested by a wireless communication terminal to the wireless communication terminal moving through a spot wireless area. In a wireless base station, an external information communication control section controls communication with a server. A contents memory stores at least a part of contents received from the server. A wireless communication section communicates with the communication terminal using a predetermined communication method. A control section establishes connection with the communication terminal using a first connection which does not require an authentication procedure, or using a second connection which requires the authentication procedure.Type: ApplicationFiled: September 13, 2012Publication date: January 3, 2013Inventors: Tsutomu MUKAI, Hitoshi TAKAI
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Patent number: 8345648Abstract: A wireless communication system transmits information requested by a wireless communication terminal to the wireless communication terminal moving through a spot wireless area. In a wireless base station, an external information communication control section controls communication with a server. A contents memory stores at least a part of contents received from the server. A wireless communication section communicates with the communication terminal using a predetermined communication method. A control section establishes connection with the communication terminal using a first connection which does not require an authentication procedure, or using a second connection which requires the authentication procedure.Type: GrantFiled: July 17, 2009Date of Patent: January 1, 2013Assignee: Panasonic CorporationInventors: Tsutomu Mukai, Hitoshi Takai
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Publication number: 20120331161Abstract: Provided is a wireless communication system transmitting information to a communication terminal moving through a spot wireless area. In an integrated base station, an external information communication section controls communication with a server. A contents memory section stores contents received from the server. A wireless LAN communication section communicates with the communication terminal. A control section establishes connection with the communication terminal using a first connection not requiring an authentication procedure for connection with the communication terminal, or using a second connection requiring the authentication procedure for connection with the communication terminal.Type: ApplicationFiled: September 10, 2012Publication date: December 27, 2012Inventors: Tsutomu MUKAI, Hitoshi Takai
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Publication number: 20120320962Abstract: The diversity reception device includes an antenna switching unit configured to select and switch to a determined chain number of antennas out of a plurality of antennas; and an antenna interchange control unit configured to control the antenna switching unit to interchange an antenna. The antenna interchange control unit compares a carrier-to-noise ratio measured by a demodulation circuit of a demodulation unit of each chain, controls the antenna switching unit to sequentially switch connection with an antenna of a chain having a lowest carrier-to-noise ratio to connection with antennas connectable to the chain, and interchanges the antenna of the chain having a lowest carrier-to-noise ratio with an antenna estimated to have a highest carrier-to-noise ratio on the basis of the input level measured by the level detection unit or an antenna having a highest input level measured by the level detection unit among the connection-switched antennas.Type: ApplicationFiled: August 24, 2012Publication date: December 20, 2012Applicant: PANASONIC CORPORATIONInventors: Hitoshi Takai, Masaki Yamaguchi, Makoto Sekitoh
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Patent number: 8284744Abstract: Provided is a wireless communication system transmitting information to a communication terminal moving through a spot wireless area. In an integrated base station, an external information communication section controls communication with a server. A contents memory section stores contents received from the server. A wireless LAN communication section communicates with the communication terminal. A control section establishes connection with the communication terminal using a first connection not requiring an authentication procedure for connection with the communication terminal, or using a second connection requiring the authentication procedure for connection with the communication terminal.Type: GrantFiled: June 29, 2009Date of Patent: October 9, 2012Assignee: Panasonic CorporationInventors: Tsutomu Mukai, Hitoshi Takai
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Patent number: 8229015Abstract: A wireless transmission system capable of exerting a maximum path diversity effect by using combinations formed by symbol waveforms. A transmission timing controlling section (23) determines a transmission start timing. A modulating section (21) modulates a signal by using one of a plurality of symbol waveform candidates and by utilizing a modulation scheme in which a phase transition of a symbol waveform represents a waveform being changed, and then transmits the modulated signal at a transmission start timing. A predetermined delay amount is set such that (i) the number of reception timings, each indicating a timing at which a receiving station (12) receives a signal, is a plural number and is less than or equal to a maximum number of effective branches for each symbol waveform, and (ii) each time difference between the reception timings is greater than or equal to a delay resolution and less than or equal to a maximum delay.Type: GrantFiled: March 16, 2007Date of Patent: July 24, 2012Assignee: Panasonic CorporationInventors: Hitoshi Takai, Kenji Miyanaga, Hideki Nakahara, Hidetoshi Yamasaki
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Patent number: 8170130Abstract: A transmission device includes a differential encoding section for differentially encoding transmission data, a first waveform generation section, a second waveform generation section, and two transmission antennas. A reception device includes a reception antenna, a delay detection section, and a data determination section for low-pass filtering a delay detection signal. The reception device receives modulated signals modulated by using two waveforms having low correlations with each other. Thus, regardless of the presence or absence of delay dispersion in a propagation path and even in a high-speed fading in which the propagation path varies at high speed, a transmission diversity effect can be achieved, thereby making it possible to improve transmission characteristics.Type: GrantFiled: March 24, 2006Date of Patent: May 1, 2012Assignee: Panasonic CorporationInventors: Hideki Nakahara, Hitoshi Takai, Koichiro Tanaka
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Patent number: 8050620Abstract: A wireless station is used as one of a plurality of relay stations forming transmission paths, respectively, different from each other, in a wireless transmission system for transmitting a packet from a transmitting station to a receiving station through the plurality of relay stations. The wireless station includes a reception section for receiving a packet transmitted from the transmitting station, and receiving a packet which is transmitted, based on the packet transmitted from the transmitting station, from another relay station, and is transmitted before the one of the plurality of relay stations performs transmission, by using a transmission parameter for obtaining a path diversity effect in the wireless transmission system.Type: GrantFiled: January 31, 2007Date of Patent: November 1, 2011Assignee: Panasonic CorporationInventors: Kenji Miyanaga, Hitoshi Takai, Hideki Nakahara, Hidetoshi Yamasaki
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Patent number: 7899139Abstract: A detected signal 111 contains a preamble portion which includes symbol alternations, followed by a unique word portion, and a data portion. Each time a symbol alternation is detected, a correction value calculation section 102 averages the phase shift in the detected signal 111 for a predetermined length, thereby calculating a correction value 115. The correction value determination section 103 stores a plurality of correction values 115 in a chronological order. When the unique word portion is detected, the correction value determination section 103 retains, as an effective correction value 118, a correction value which is arrived at by going back a predetermined number of correction values among the stored correction values. A phase rotation section 104 corrects the phase of the detected signal 111 by using an effective correction value 118 calculated by the correction value determination section 103.Type: GrantFiled: January 3, 2008Date of Patent: March 1, 2011Assignee: Panasonic CorporationInventors: Hideki Nakahara, Koichiro Tanaka, Kenichi Mori, Yoshio Urabe, Hitoshi Takai
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Publication number: 20100239039Abstract: A wireless transmission system capable of performing multi-station simultaneous transmission of data by wireless is provided. The wireless transmission system includes a plurality of wireless stations for transmitting and receiving data. Transmitter-side wireless stations, a multipath channel, and receiver-side wireless stations constitute a system for path diversity. At least one wireless station among the wireless stations determines, depending on a response packet with respective to a multi-station simultaneous transmission request packet transmitted by itself or other stations, a plurality of delay amounts from a reference timing during multi-station simultaneous transmission in the wireless transmission system, and a plurality of symbol waveforms that are a basis for a modulated waveform.Type: ApplicationFiled: March 20, 2007Publication date: September 23, 2010Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Hitoshi Takai, Hidetoshi Yamasaki, Hideki Nakahara, Kenji Miyanaga
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Patent number: 7787417Abstract: In a wireless communication system using the contention method, collisions between transmission signals sent from terminals to a base station are avoided, and a communication area is flexibly formed while suppressing unnecessary radiation of the communication area.Type: GrantFiled: July 5, 2005Date of Patent: August 31, 2010Assignee: Panasonic CorporationInventors: Hidetoshi Yamasaki, Kenji Miyanaga, Hitoshi Takai, Koichiro Tanaka
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Inter-station transmission method, radio base station monitoring method, and device using the method
Patent number: 7773568Abstract: A inter-station transmission method of extending time allocated for a transmission path delay of an inter-station transmission path within a predetermined turnaround time, and increasing an inter-station transmission distance. A radio base station reproduces a clock synchronized with a BSU transmission clock DCLK used when transmitting downlink transmission data from a communication control station. The radio base station processes the downlink transmission data. The clock synchronization eliminates a necessity of data format conversion between the communication control station and the radio base station, a buffer accumulating transmission data in preparation for the conversion is not necessary. This reduces a turnaround time of a mobile communication system.Type: GrantFiled: December 9, 2004Date of Patent: August 10, 2010Assignee: Panasonic CorporationInventors: Hidetoshi Yamasaki, Hitoshi Takai -
Patent number: 7756218Abstract: A wireless transmission system exerts a maximum path diversity effect even if the maximum number of effective branches is limited to a small number. A transmission timing control section determines a transmission start timing to be a timing obtained by delaying a reference timing by a predetermined delay amount. A modulation section modulates a signal by a modulation scheme such that an anti-multipath property is exerted when the signal is demodulated on a receiver side, and transmits the modulated signal at the transmission start timing. In a receiving station, a demodulation section demodulates the receive signal to obtain receive data.Type: GrantFiled: September 16, 2005Date of Patent: July 13, 2010Assignee: Panasonic CorporationInventors: Hideki Nakahara, Hitoshi Takai, Hidetoshi Yamasaki, Kenji Miyanaga, Koichiro Tanaka
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Patent number: 7738540Abstract: A wireless transmission system capable of performing a multi-station simultaneous transmission of data, that is, simultaneously transmitting data by wireless to a plurality of stations. The wireless transmission system includes a plurality of wireless stations for transmitting/receiving data and it constitutes a system for path diversity by use of a wireless station at the transmitting end, a multipath transmission path, and a wireless station at the receiving end. At least one of the plurality of wireless stations decides, in accordance with a response packet responsive to a multi-station simultaneous transmission request packet transmitted by the wireless station or other stations, a plurality of delay amounts relative to a reference timing during the multi-station simultaneous transmission in the wireless transmission system.Type: GrantFiled: September 26, 2005Date of Patent: June 15, 2010Assignee: Panasonic CorporationInventors: Hidetoshi Yamasaki, Hitoshi Takai, Hideki Nakahara, Kenji Miyanaga