Patents by Inventor Keisuke Ebiko
Keisuke Ebiko 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: 8700046Abstract: A mobile communication system wherein the upstream radio channel interference of a macrocell connection terminal with a femtocell base station can be reduced while the consumption of radio resources caused by increase in signaling is being suppressed. The macrocell connection terminal (401) performs, based on an instruction from a macrocell base station (402), an upstream channel transmission and further reports a peripheral-femtocell detection result obtained by a measuring unit to the macrocell base station. The macrocell base station (402) instructs the terminal to perform a peripheral-femtocell detection. The identifier of the terminal and the peripheral-femtocell detection result obtained by the terminal are transmitted to a network management apparatus (404).Type: GrantFiled: August 18, 2010Date of Patent: April 15, 2014Assignee: Panasonic CorporationInventors: Keisuke Ebiko, Akito Fukui, Toyoki Ue
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Patent number: 8526527Abstract: A radio communication apparatus and an associated method are provided. The apparatus includes a receiving unit configured to receive first data and second data, which are transmitted from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided. The apparatus further includes a calculating unit configured to calculate a first absolute CQI value per each of the blocks for the first data and a second absolute CQI value per each of the blocks for the second data, and calculate a relative value of the second absolute CQI value with respect to the first absolute CQI value, per each of the blocks. The apparatus still further includes a transmitting unit configured to transmit the first absolute CQI value and the relative value of the second absolute CQI value in the same block.Type: GrantFiled: January 23, 2012Date of Patent: September 3, 2013Assignee: Panasonic CorporationInventors: Jinsong Duan, Keisuke Ebiko, Ryohei Kimura
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Patent number: 8417280Abstract: Provided are a base station device and a transmission power control method that reduce interference with an uplink radio channel from a femto-connected terminal to a macrocell base station while avoiding an increase in signaling. A measurement unit (103) measures the macrocell signal reception level, and a propagation loss estimating unit (104) estimates propagation loss between a HUE and a HNB based on the HUE signal reception power, for example. A judgment unit (105) performs a first comparison of the macrocell signal reception level with a first threshold value and a second comparison of the propagation loss with a second threshold value, and an adjustment unit (106) generates a command to reduce the maximum value that is possible for the target control value for the HNB total reception power when the macrocell signal reception level is at least the first threshold value and the propagation loss is at least the second threshold value.Type: GrantFiled: November 27, 2009Date of Patent: April 9, 2013Assignee: Panasonic CorporationInventor: Keisuke Ebiko
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Patent number: 8279953Abstract: A transmitting apparatus, a receiving apparatus and a wireless communication method for suppressing interference between codes, while further reducing the ratio of redundant components occupying a signal to improve the transmission efficiency. The transmitting apparatus (100) transmits a signal having a frame structure in which a plurality of symbols follow a pilot symbol to which a guard interval has been added. In the receiving apparatus (200) that receives that signal, a long FFT target section acquiring part (202) acquires, from the received OFDM signal, a long FFT target section that is a target section in which delay waves are to be removed by use of a pilot symbol. A long FFT part (203) performs a fast Fourier transformation of the long FFT target section to convert it to a frequency domain signal. A frequency equalizing part (204) performs a frequency equalization of the long FFT target section by use of an interpolation result of communication line estimation value.Type: GrantFiled: December 27, 2005Date of Patent: October 2, 2012Assignee: Panasonic CorporationInventors: Mitsuru Uesugi, Eiji Ota, Atsushi Sumasu, Keisuke Ebiko
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Publication number: 20120135743Abstract: A mobile communication system wherein the upstream radio channel interference of a macrocell connection terminal with a femtocell base station can be reduced while the consumption of radio resources caused by increase in signaling is being suppressed. The macrocell connection terminal (401) performs, based on an instruction from a macrocell base station (402), an upstream channel transmission and further reports a peripheral-femtocell detection result obtained by a measuring unit to the macrocell base station. The macrocell base station (402) instructs the terminal to perform a peripheral-femtocell detection. The identifier of the terminal and the peripheral-femtocell detection result obtained by the terminal are transmitted to a network management apparatus (404).Type: ApplicationFiled: August 18, 2010Publication date: May 31, 2012Applicant: PANASONIC CORPORATIONInventors: Keisuke Ebiko, Akito Fukui, Toyoki Ue
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Publication number: 20120120835Abstract: A radio communication apparatus and an associated method are provided. The apparatus includes a receiving unit configured to receive first data and second data, which are transmitted from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided. The apparatus further includes a calculating unit configured to calculate a first absolute CQI value per each of the blocks for the first data and a second absolute CQI value per each of the blocks for the second data, and calculate a relative value of the second absolute CQI value with respect to the first absolute CQI value, per each of the blocks. The apparatus still further includes a transmitting unit configured to transmit the first absolute CQI value and the relative value of the second absolute CQI value in the same block.Type: ApplicationFiled: January 23, 2012Publication date: May 17, 2012Applicant: PANASONIC CORPORATIONInventors: Jinsong Duan, Keisuke Ebiko, Ryohei Kimura
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Patent number: 8155227Abstract: A mobile terminal device for performing multi-carrier communication with a base station device can improve communication quality while reducing the data amount without lowering accuracy of feedback information.Type: GrantFiled: June 15, 2011Date of Patent: April 10, 2012Assignee: Panasonic CorporationInventors: Jinsong Duan, Mitsuru Uesugi, Keisuke Ebiko, Keiji Takakusaki, Atsushi Sumasu
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Patent number: 8139662Abstract: A mobile terminal device for performing multi-carrier communication with a base station device can improve communication quality while reducing the data amount without lowering accuracy of feedback information.Type: GrantFiled: August 4, 2005Date of Patent: March 20, 2012Assignee: Panasonic CorporationInventors: Jinsong Duan, Mitsuru Uesugi, Keisuke Ebiko, Keiji Takakusaki, Atsushi Sumasu
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Patent number: 8130861Abstract: A radio communication apparatus and an associated method are provided. The apparatus includes a receiving unit configured to receive first data and second data, which are transmitted from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided. The apparatus further includes a calculating unit configured to calculate a first absolute CQI value per each of the blocks for the first data and a second absolute CQI value per each of the blocks for the second data, and calculate a relative value of the second absolute CQI value with respect to the first absolute CQI value, per each of the blocks. The apparatus still further includes a transmitting unit configured to transmit the first absolute CQI value and the relative value of the second absolute CQI value in the same block.Type: GrantFiled: March 29, 2011Date of Patent: March 6, 2012Assignee: Panasonic CorporationInventors: Jinsong Duan, Keisuke Ebiko, Ryohei Kimura
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Publication number: 20110243027Abstract: A mobile terminal device for performing multi-carrier communication with a base station device can improve communication quality while reducing the data amount without lowering accuracy of feedback information.Type: ApplicationFiled: June 15, 2011Publication date: October 6, 2011Applicant: PANASONIC CORPORATIONInventors: Jinsong DUAN, Mitsuru Uesugi, Keisuke Ebiko, Keiji Takakusaki, Atsushi Sumasu
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Publication number: 20110223964Abstract: Provided are a base station device and a transmission power control method that reduce interference with an uplink radio channel from a femto-connected terminal to a macrocell base station while avoiding an increase in signaling. A measurement unit (103) measures the macrocell signal reception level, and a propagation loss estimating unit (104) estimates propagation loss between a HUE and a HNB based on the HUE signal reception power, for example. A judgment unit (105) performs a first comparison of the macrocell signal reception level with a first threshold value and a second comparison of the propagation loss with a second threshold value, and an adjustment unit (106) generates a command to reduce the maximum value that is possible for the target control value for the HNB total reception power when the macrocell signal reception level is at least the first threshold value and the propagation loss is at least the second threshold value.Type: ApplicationFiled: November 27, 2009Publication date: September 15, 2011Inventor: Keisuke Ebiko
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Publication number: 20110176595Abstract: A radio communication apparatus and an associated method are provided. The apparatus includes a receiving unit configured to receive first data and second data, which are transmitted from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided. The apparatus further includes a calculating unit configured to calculate a first absolute CQI value per each of the blocks for the first data and a second absolute CQI value per each of the blocks for the second data, and calculate a relative value of the second absolute CQI value with respect to the first absolute CQI value, per each of the blocks. The apparatus still further includes a transmitting unit configured to transmit the first absolute CQI value and the relative value of the second absolute CQI value in the same block.Type: ApplicationFiled: March 29, 2011Publication date: July 21, 2011Applicant: PANASONIC CORPORATIONInventors: Jinsong Duan, Keisuke Ebiko, Ryohei Kimura
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Patent number: 7940851Abstract: A radio communication apparatus and an associated method are provided. The apparatus includes a receiving unit configured to receive first data and second data, which are transmitted from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided. The apparatus further includes a calculating unit configured to calculate a first absolute CQI value per each of the blocks for the first data and a second absolute CQI value per each of the blocks for the second data, and calculate a relative value of the second absolute CQI value with respect to the first absolute CQI value, per each of the blocks. The apparatus still further includes a transmitting unit configured to transmit the first absolute CQI value and the relative value of the second absolute CQI value in the same block.Type: GrantFiled: April 21, 2006Date of Patent: May 10, 2011Assignee: Panasonic CorporationInventors: Jinsong Duan, Keisuke Ebiko, Ryohei Kimura
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Publication number: 20100195707Abstract: A mobile terminal device for performing multi-carrier communication with a base station device can improve communication quality while reducing the data amount without lowering accuracy of feedback information.Type: ApplicationFiled: August 4, 2005Publication date: August 5, 2010Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Jinsong Duan, Mitsuru Uesugi, Keisuke Ebiko, Keiji Takakusaki, Atsushi Sumasu
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Publication number: 20090232233Abstract: A MIMO receiver apparatus and a MIMO transmitter apparatus capable of reducing the feedback information amount to reduce the system traffics. A wireless communication apparatus (100) at a receiving end comprises a reception level determining part (130) that uses pilot signals transmitted from the antennas of a wireless communication apparatus (200) at a transmitting end to determine a communication quality (e.g.Type: ApplicationFiled: April 21, 2006Publication date: September 17, 2009Applicant: Panasonic CorporationInventors: Jinsong Duan, Keisuke Ebiko, Ryohei Kimura
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Publication number: 20090046787Abstract: A transmitting apparatus, a receiving apparatus and a wireless communication method for suppressing interference between codes, while further reducing the ratio of redundant components occupying a signal to improve the transmission efficiency. The transmitting apparatus (100) transmits a signal having a frame structure in which a plurality of symbols follow a pilot symbol to which a guard interval has been added. In the receiving apparatus (200) that receives that signal, a long FFT target section acquiring part (202) acquires, from the received OFDM signal, a long FFT target section that is a target section in which delay waves are to be removed by use of a pilot symbol. A long FFT part (203) performs a fast Fourier transformation of the long FFT target section to convert it to a frequency domain signal. A frequency equalizing part (204) performs a frequency equalization of the long FFT target section by use of an interpolation result of communication line estimation value.Type: ApplicationFiled: December 27, 2005Publication date: February 19, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Mitsuru Uesugi, Eiji Ota, Atsushi Sumasu, Keisuke Ebiko
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Publication number: 20080233901Abstract: A radio communication apparatus enabling reduction in peak-to-average power ratio without decreasing the transmission efficiency. In this apparatus, buffer section 103 temporarily stores input data prior to peak suppression. Peak detecting section 106 detects a peak with an amplitude level not less than a threshold. Peak cut section 107 reduces the detected peak to the threshold. Switching section 109 is switched so that the peak suppressed signal is output to FFT section 114 when the peak is detected, while the peak suppressed signal is subjected to transmission processing when the peak is not detected. Based on MCS information, signal recovering section 115 eliminates a signal assigned to a subcarrier set for MCS of a high level, and as a substitute, assigns the signal prior to peak suppression stored in buffer section 103. MCS setting section 116 selects MCS based on reception quality information of a communicating party.Type: ApplicationFiled: September 17, 2004Publication date: September 25, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Keisuke Ebiko, Mitsuru Uesugi
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Publication number: 20050239488Abstract: A multi-carrier communication apparatus and a multi-carrier communication method, wherein in a radio communication that performs multi-antenna transmission, a transmission peak power is suppressed without inducing nonlinear distortion and without decreasing transmission efficiency. Based on control information outputted from an exchange pattern decision section (190), a data exchange section (120) exchanges data, which are arranged on subcarriers of each group, between data streams in units of groups of subcarriers. Power measurement sections (160-1 to n) each measure powers of OFDM symbols in each data stream and compare them with a predetermined threshold and as a result of comparison, when the power of the OFDM symbol is greater than the predetermined threshold, the measurement sections each output power measurement results to an exchange pattern decision section (190).Type: ApplicationFiled: October 30, 2003Publication date: October 27, 2005Inventor: Keisuke Ebiko
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Publication number: 20050213538Abstract: A server (191) transmits image information consisting of basic data and complementary data to a router (100) through the Internet (192). The router (100) allocates the basic data to a BS (110) of a cellular system (193) and the complementary data to an AP (120) of a wireless LAN system (194). The BS (110) transmits the basic data to a MS (150) and the AP (120) transmits the complementary data to the MS (150). When the MS (150) is located in the area of the cellular system (193), the MS always maintains a communication channel with the BS (110) and when the MS enters the area of the wireless LAN system (194), the MS also opens a channel with the AP (120) while maintaining the channel with the BS (110). This allows the user to continue seamless communication.Type: ApplicationFiled: May 29, 2003Publication date: September 29, 2005Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTDInventors: Keisuke Ebiko, Mitsuru Uesugi, Isamu Yoshii, Kenichi Miyoshi, Takahisa Aoyama
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Publication number: 20040260805Abstract: There are provided a communication system where foreign kinds of networks are mixed such as a wireless LAN and a mobile phone system, wherein the hand-over of a communication terminal apparatus between the networks is performed smoothly, and the communication terminal apparatus, and a hand-over method. A relaying section provided for the communication terminal apparatus notifies information about the communication terminal apparatus used in a network to another network.Type: ApplicationFiled: May 4, 2004Publication date: December 23, 2004Inventors: Takahisa Aoyama, Masayuki Hoshino, Kenichi Miyoshi, Keisuke Ebiko