Patents by Inventor Seigo Nakao

Seigo Nakao 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).

  • Publication number: 20200235831
    Abstract: Received Signal Strength Indicator (RSSI) is measured accurately even in a case where a discovery signal is transmitted. A receiver receives a plurality of subframes, at least one of which includes a discovery signal, and a measurer measures Reference Signal Reception Power (RSRP) using a first resource in which the discovery signal is mapped, measures RSSI using a second resource different from the first resource for which the discovery signal is mapped, and calculates Reference Signal Reception Quality (RSRQ) using RSRP and RSSI.
    Type: Application
    Filed: April 9, 2020
    Publication date: July 23, 2020
    Inventors: Ayako Horiuchi, Masayuki Hoshino, Seigo Nakao
  • Patent number: 10721028
    Abstract: The present disclosure provides wireless communication methods for repeated transmission of channels, and wireless communication devices therefor. In one embodiment, the gap between the starting subframe of a first channel and the starting subframe of a second channel is defined or configured. In another embodiment, Mx*W=M and Mx*n=N is satisfied, where Mx is the number of subframes reserved for the channel in one HARQ process, M is RTT for one HARQ process, W is a positive integer and represents the maximum number of HARQ processes transmitting the channel within M subframes, N is the gap between the starting subframes of the channel in two HARQ processes, and n is a positive integer. In yet another embodiment, time-frequency resources for the channel in different HARQ processes are different.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: July 21, 2020
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Chi Gao, Hidetoshi Suzuki, Masayuki Hoshino, Seigo Nakao
  • Publication number: 20200229200
    Abstract: It is possible to provide a radio communication terminal device and a radio transmission method which can improve reception performance of a CQI and a reference signal. A phase table storage unit stores a phase table which correlates the amount of cyclic shift to complex coefficients {w1, w2} to be multiplied on the reference signal. A complex coefficient multiplication unit reads out a complex coefficient corresponding to the amount of cyclic shift indicated by resource allocation information, from the phase table storage unit and multiplies the read-out complex coefficient on the reference signal so as to change the phase relationship between the reference signals in a slot.
    Type: Application
    Filed: March 31, 2020
    Publication date: July 16, 2020
    Inventors: Tomofumi Takata, Daichi Imamura, Seigo Nakao, Sadaki Futagi, Takashi Iwai, Yoshihiko Ogawa
  • Patent number: 10716132
    Abstract: A wireless communication base station device, terminal device, and method have reduced signaling while maintaining high scheduling gain. A judgment unit pre-stores a correspondence between the number of code words and the number of clusters to reduce the maximum value for the number of clusters allocated to each terminal as the number of code words increases, and thus determines the maximum value for the number of clusters based on the number of code words acquired. Based on the number of code words for a transmission signal from a terminal, an estimated value for the reception quality, and the maximum value for the number of clusters that is output by the judgment unit, a scheduling unit schedules the allocation of the transmission signal transmitted by each terminal to a transmission band frequency (frequency resource) so as not to exceed the maximum value for the number of clusters.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: July 14, 2020
    Assignee: Sun Patent Trust
    Inventors: Yoshihiko Ogawa, Akihiko Nishio, Daichi Imamura, Seigo Nakao, Masayuki Hoshino, Takashi Iwai, Sadaki Futagi
  • Patent number: 10715287
    Abstract: In a base station, a control unit and a data size regulation unit control the data size of downstream assignment control data and upstream assignment control data in the PDCCH signal based on the communication format used between the base station and a terminal, the number of base station antennas (M) (nonnegative number), the number of terminal antennas (N) (nonnegative number), the bandwidth of the downstream band, and the bandwidth of the upstream band. Specifically, the control unit determines it is unnecessary to adjust the aforementioned data size when the selected communication format is first established between multiple antennas and when where there are multiple for one of M and N and only one for the other. The quality of downstream assignment control data is prevented from degrading, while preventing the number of blind determinations from increasing on the receiving side of the downstream control channel signal.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: July 14, 2020
    Assignee: Sun Patent Trust
    Inventors: Seigo Nakao, Akihiko Nishio, Daichi Imamura
  • Patent number: 10708886
    Abstract: Provided is a radio communication terminal which is capable of measuring quality in communication with a handover destination with high accuracy. The radio communication terminal is capable of communicating with a base station or a relay node, and includes: a receiver which receives control information including information relating to measurement of measuring quality of a neighbor cell; an extractor which extracts information on a subframe where the measurement should be performed, which is a subframe where only transmission of a signal from the relay node connected to the base station is performed, from the information relating to the measurement; a measurement section which performs the measurement, on a subframe basis, based on the extracted information on the subframe where the measurement should be performed; and a transmitter which transmits a result of the measurement to the base station or the relay node.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: July 7, 2020
    Assignee: Sun Patent Trust
    Inventors: Yasuaki Yuda, Seigo Nakao, Ayako Horiuchi, Akihiko Nishio, Daichi Imamura, Kenichi Miyoshi
  • Publication number: 20200204231
    Abstract: The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal.
    Type: Application
    Filed: February 28, 2020
    Publication date: June 25, 2020
    Inventors: Hui Tong, Masayuki Hoshino, Ming Xu, Seigo Nakao, Daichi Imamura
  • Patent number: 10693601
    Abstract: If repetition transmission is applied to a response signal for a downlink data signal and an uplink signal, the uplink signal is repeatedly transmitted using a certain number of consecutive subframes starting with a first subframe, at which the repetition transmission of the uplink signal starts, and the response signal is repeatedly transmitted using at least the certain number of consecutive subframes starting with a second subframe, at which the repetition transmission of the response signal starts. The first subframe is set to be the same as the second subframe.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: June 23, 2020
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Tetsuya Yamamoto, Seigo Nakao, Hidetoshi Suzuki, Masayuki Hoshino
  • Patent number: 10693604
    Abstract: The invention provides a base station that does not cause the number of blind decodings to be increased and further can prevent the flexibility of resource allocation from degrading. A search space setting unit sets search spaces each of which is constituted by one or more control channel elements (CCEs) and each of which is to be decoded in the terminals and each of which is defined by a plurality of to-be-decoded candidates. An allocating unit places, in one of the plurality of to-be-decoded candidates included in the search space, a control channel. The number of connections of CCEs constituting the to-be-decoded candidate is associated with the number of to-be-decoded candidates. The search space setting unit causes, in accordance with the control channel to be transmitted, the association of the number of connections of CCEs constituting the to-be-decoded candidate with the number of to-be-decoded candidates to differ.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: June 23, 2020
    Assignee: Sun Patent Trust
    Inventors: Seigo Nakao, Akihiko Nishio, Ayako Horiuchi, Daichi Imamura
  • Publication number: 20200196292
    Abstract: Provided are a radio terminal device, a radio base station device, and a channel signal forming method which can prevent quality degradation of the downlink resource allocation information by reducing the frequency of the zero information addition process to the downlink resource allocation information when executing communication using an uplink unit band and multiple downlink unit bands correlated to the uplink unit band. A base station includes: a PDCCH generation unit which includes the uplink allocation information relating to the uplink unit band only in some of the channel signals formed for each of the downlink unit bands; and a padding unit which adds zero information to the downlink allocation information only in the selected some channel signals having the bandwidth of the corresponding downlink unit band smaller than that of the uplink unit band until the downlink allocation information size becomes equal to the uplink allocation information size.
    Type: Application
    Filed: February 27, 2020
    Publication date: June 18, 2020
    Inventors: Seigo Nakao, Akihiko Nishio, Daichi Imamura, Takahisa Aoyama
  • Patent number: 10686550
    Abstract: A radio transmitting device and method enables reduction of an increase of CGI memories for the control channel and an improvement of the throughput of the data channel. When multiplex transmission through the control channel and the data channel is carried out and when adaptive modulation is applied to both channels, an MCS selecting section is provided with one CQI table for the data channel and CQI tables for the control channel, and a table selecting MCS determining section selects one of the tables depending on the transmission bandwidth of the terminal and determines the MCS of the control channel while looking up the selected CQI table.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: June 16, 2020
    Assignee: Godo Kaisha IP Bridge 1
    Inventors: Sadaki Futagi, Daichi Imamura, Seigo Nakao, Tomofumi Takata
  • Patent number: 10681709
    Abstract: A terminal capable of reducing the resource regions in an uplink component band without increasing signaling even if a plurality of acknowledgment signals to downlink data transmitted respectively in a plurality of downlink component bands are transmitted from one uplink component band.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: June 9, 2020
    Assignee: Sun Patent Trust
    Inventors: Akihiko Nishio, Seigo Nakao
  • Publication number: 20200178230
    Abstract: In the base station (100), a search space setting unit (103) sets a search space on the basis of a search space setting rule in accordance with R-PDCCH range of a setting target slot, and an allocating unit (108) places DCI in one of a plurality of candidates of to-be-decoded unit range included in the set search space. The search space setting rules are associated with respective numbers of candidates of to-be-decoded unit range corresponding to the respective ones of a plurality of numbers of connections for R-CCE, and a first search space setting rule of a slot 0 and a second search space setting rule of a slot 1 are different from each other in terms of the patterns related to the numbers of candidates of to-be-decoded unit range corresponding to the plurality of numbers of connections for R-CCE.
    Type: Application
    Filed: February 10, 2020
    Publication date: June 4, 2020
    Inventors: Toru OIZUMI, Seigo NAKAO, Ayako HORIUCHI
  • Publication number: 20200177332
    Abstract: A data alignment method capable of preventing degradation in demodulation performance due to variation in signal qualities when a data signal to which a Turbo code is applied is transmitted simultaneously from a plurality of cells. The method divides signal components to be used for data alignment into resources common to all the cells and resources dependent on the cells and transmits encoded and rate-matched data with the first half thereof aligned to the resources common to all the cells and the second half thereof aligned to the resources dependent on the cells.
    Type: Application
    Filed: December 10, 2019
    Publication date: June 4, 2020
    Inventors: Masayuki HOSHINO, Seigo NAKAO, Daichi IMAMURA
  • Publication number: 20200178219
    Abstract: To suppress concentration of channel quality information requests and reports in a case of discontinuously transmitting reference signals at specific resources in a time domain, and thereby preventing degradation in throughput. A transmission apparatus transmits an instruction of CSI request distributed for each reception apparatus in a subframe concurrently with or earlier than a reference signal CSI-RS to each of reception apparatuses. Each of the reception apparatuses detects the CSI request from the transmission apparatus and calculates CSI from a channel estimation value of CSI-RS received thereafter. Then, the reception apparatus identifies CSI report subframe of the own apparatus from CSI report interval information of a given time interval notified in advance, the subframe in which the CSI request is detected and transmission timing of CSI-RS, and transmits a feedback signal including CSI report value by using PUSCH at the timing of the CSI report subframe.
    Type: Application
    Filed: February 7, 2020
    Publication date: June 4, 2020
    Inventors: Masayuki HOSHINO, Akihiko NISHIO, Seigo NAKAO, Daichi IMAMURA, Yasuaki YUDA
  • Publication number: 20200178156
    Abstract: A terminal and a communication method thereof whereby, even in a case of employing an asymmetric carrier aggregation system and further employing a MIMO transmission method for upstream channels, the error characteristic of control information can be prevented from being degraded. In the terminal, a transport signal forming unit forms transport signals by arranging, based on an arrangement rule, ACK/NACK and CQI in a plurality of layers. According to the arrangement rule, an error detection result is arranged, on a priority basis, in a layer that is different from a layer in which the channel quality information is arranged. In this way, the puncturing of CQI using ACK/NACK can be minimized, with the result that the error characteristic of control information can be prevented from being degraded.
    Type: Application
    Filed: February 10, 2020
    Publication date: June 4, 2020
    Inventors: Yoshihiko OGAWA, Seigo NAKAO, Akihiko NISHIO, Masayuki HOSHINO, Daichi IMAMURA, Atsushi SUMASU
  • Patent number: 10674511
    Abstract: A wireless communication base station device which makes it possible to provide a base station, terminal and CCE allocation method capable of reducing the number of times blind decoding of a terminal is performed, without increasing the CCE block rate, even when a plurality of unit bands are set in a terminal. In this device, a search space setting section (103) sets in each of a plurality of unit bands a common search space in respect of a terminal which is communicating using the plurality of unit bands and other terminals, and sets in each of the plurality of unit bands an individual search space in respect of the terminal. An allocation section (106) allocates control information solely to CCEs within the common search spaces set in specified unit bands among the plurality of unit bands, or solely to CCEs within individual search spaces set in specified unit bands.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: June 2, 2020
    Assignee: SUN PATENT TRUST
    Inventors: Akihiko Nishio, Seigo Nakao
  • Patent number: 10667246
    Abstract: Repetitions of a control signal across a plurality of first subframes and a data signal allocated to a resource indicated by the control signal are received. Repetition of a response signal for the data signal across a plurality of second subframes is performed, and a transmission signal is generated by multiplying the response signals in the second subframes by, among a plurality of first sequences orthogonal to one another, components of one of the first sequences which is associated with the first subframes, respectively.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: May 26, 2020
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Tetsuya Yamamoto, Seigo Nakao, Masayuki Hoshino
  • Patent number: 10667263
    Abstract: Disclosed are a wireless communication base station device and a division number determination method that improve the frequency diversity effect while maintaining channel estimation accuracy regardless of the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. A determination unit determines the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. Here, the determination unit increases the number of divisions in the frequency domain of the transmission signal from the wireless communication terminal device as the number of pilot blocks included in the transmission signal increases. In addition, a scheduling unit schedules allocation to the frequency resources of the divided transmission signal according to the number of divisions determined by the determination unit.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: May 26, 2020
    Assignee: Sun Patent Trust
    Inventors: Yoshihiko Ogawa, Seigo Nakao, Daichi Imamura, Akihiko Nishio, Masayuki Hoshino, Katsuhiko Hiramatsu, Kenichi Miyoshi, Yasuaki Yuda, Sadaki Futagi, Takashi Iwai
  • Patent number: 10667251
    Abstract: Disclosed is a base station in which the frequency usage efficiency can be improved when the communication bandwidths are asymmetric in the uplink line and the downlink line. A base station can communicate by using a plurality of downlink unit bands and a smaller number of uplink unit bands. A control unit allocates uplink resource allocation information and downlink resource allocation information to a PDCCH which is arranged in each of the plurality of downlink unit bands, and allocates a response signal to the uplink line data to a PHICH which is arranged in the same number of downlink unit bands from the plurality of downlink unit bands as there are uplink unit bands. A transmit RF unit transmits the resource allocation information or the response signal.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: May 26, 2020
    Assignee: SUN PATENT TRUST
    Inventors: Seigo Nakao, Akihiko Nishio, Daichi Imamura