Patents by Inventor Anass Benjebbour

Anass Benjebbour 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: 10791470
    Abstract: The present invention is designed to shorten the time that a user terminal takes to detect the common control/reference signals while coverage of the common control/reference signals transmitted from a small base station is secured. As the radio communication method of the invention, a radio communication method is provided in which beam forming information for forming transmission beams directed from the small base station to the user terminal are generated based on position-related information of the user terminal acquired by communication between the macro base station and the user terminal using a coverage carrier and position-related information of the small base station, and the small base station precodes at least one of a common control signal and a reference signal that are common in a small cell based on the beam forming information and transmits the precoded signal from a plurality of transmitting antennas using a capacity carrier.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: September 29, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Patent number: 10791469
    Abstract: The present invention is designed to expand the coverage of reference signals in small cells that are arranged to overlap a macro cell, and, furthermore, reduce the interference between the small cells and improve the received quality of the reference signals in user terminals. The radio communication method of the present invention provides a radio communication method in a radio base station forming a small cell that is placed to overlap a macro cell, and includes the steps of generating a reference signal for measuring received quality, in a first transmission period in which beamforming is not executed, transmitting the reference signal in a narrower transmission bandwidth and with greater transmission power than in a second transmission period in which beamforming is executed, and allocating the reference signal to a band associated with information that is specific to each radio base station forming a small cell, and transmitting the reference signal.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: September 29, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Patent number: 10779280
    Abstract: A small base station executes radio communication using multiple antennas. There are set multiple antenna groups that each include all or a portion of the antennas and multiple antenna group patterns that each include at least one of the antenna groups. The small base station transmits reference signals with sequences that differ from one another between antenna groups that are included in the same antenna group pattern. A user apparatus receives the reference signals. Based on a reception result of the reference signals, a use antenna group pattern and at least one use antenna group that are to be used for transmission of a radio signal from the small base station are determined.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: September 15, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Patent number: 10721692
    Abstract: A radio communication method is provided in which a local area base station apparatus, arranged in a wide area where a first carrier frequency is used and forming a local area that is narrower than the wide area, transmits a downlink signal, using a second carrier frequency, which belongs to a different frequency band from the first carrier frequency and which has a wider bandwidth than the first carrier frequency, the local area base station apparatus transmits a detection signal that is used to detect the local area base station apparatus in the mobile terminal apparatus, and the local area base station apparatus transmits the downlink signal for the mobile terminal apparatus with transmission power that is determined based on the path loss of the detection signal received in the mobile terminal apparatus.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: July 21, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Yoshihisa Kishiyama, Anass Benjebbour, Kazuaki Takeda
  • Patent number: 10645622
    Abstract: A user terminal selects small cells in a radio communication system in which a macro cell and small cells are arranged to overlap each other. In the cell selection method of the present invention, a macro base station to form a macro cell carries out the steps of determining the offset value to use in cell selection in a user terminal based on transmission property information of a second carrier in the small cell, and reporting the offset value to the user terminal. Also, the user terminal carries out the steps of measuring the received quality of reference signals from the macro base station and the small base station, receiving the offset value that is reported from the macro base station, and carrying out cell selection based on the received quality that is measured and the offset value that is received.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: May 5, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Patent number: 10548093
    Abstract: The present invention is designed to make possible link adaptation that is suitable for future radio communication systems. A radio base station according to the present invention has a coding section that encodes downlink data for each of a plurality of user terminals, a modulation section that modulates the downlink data for each of the plurality of user terminals, and a transmission section that multiplexes the downlink data for each of the plurality of user terminals on a per subband basis, and transmits the downlink data for each of the plurality of user terminals by using transmission power that is allocated to each of the plurality of user terminals on a per subband basis.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: January 28, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama, Yuuya Saitou
  • Patent number: 10548162
    Abstract: A user apparatus according to an embodiment is provided. The user apparatus communicates with a base station in a wireless communication system. The user apparatus includes an obtaining unit configured to obtain resource allocation information in which downlink signal reception quality is associated with radio resources used for uplink signal transmission; a measurement unit configured to measure the downlink signal reception quality; and a transmission unit configured to determine a radio resource of the radio resources used for uplink signal transmission by comparing the resource allocation information with the measured downlink signal reception quality, and transmit an uplink signal by using the determined radio resource.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: January 28, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Patent number: 10536203
    Abstract: The present invention is designed to provide a radio base station, a user terminal, a radio communication method and a radio communication system of novel structures that can achieve improved throughput and system capacity.
    Type: Grant
    Filed: December 25, 2013
    Date of Patent: January 14, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Patent number: 10530446
    Abstract: A user terminal includes a receiving section that receives a signal subjected to multiplexing in a power dimension in a given layer and that receives information about the multiplexing in the power dimension; and a signal processing section that demodulates a signal for the user terminal from the multiplexed signal based on the information about the multiplexing in the power dimension.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: January 7, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama, Kenichi Higuchi
  • Publication number: 20190357191
    Abstract: A user terminal is disclosed including a first decoding section that decodes a downlink signal for another user terminal from downlink signals for a plurality of user terminals that are non-orthogonal multiplexed over a given radio resource. The user terminal includes a first judgement section that judges whether or not the downlink signal for the other user terminal has been successfully received, based on a decoding result in the first decoding section. The user terminal further includes an interference cancellation section that cancels the decoded downlink signal for the other user terminal from the downlink signals for the plurality of user terminals. The user terminal also includes a second decoding section that decodes a downlink signal for the user terminal, from the downlink signals for the plurality of user terminals, from which the downlink signal for the other user terminal has been canceled in the interference cancellation section.
    Type: Application
    Filed: August 5, 2019
    Publication date: November 21, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Yoshihisa Kishiyama, Anass Benjebbour, Yuuya Saitou
  • Patent number: 10356727
    Abstract: For each UE, a base station determines the number of streams for transmitting a data signal, performs different precoding on the data signal depending on the UE, and allocates different transmission powers to at least two UEs. The base station transmits streams addressed to the at least two UEs in a form in which these streams are non-orthogonally mixed, with transmission powers that are different for the UEs. For each of the streams addressed to these UEs, the base station estimates predictive indices for these UEs from channel state information determined by the UEs to which those streams are addressed, and, based on the predictive indices, allocates different transmission powers to those UEs such that the better the predictive index is, the lower the transmission power is.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: July 16, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Patent number: 10334603
    Abstract: The present invention is designed to provide a radio base station, a user terminal, a radio communication system and a radio communication method of novel structures that can improve the efficiency of the use of radio resources sufficiently.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: June 25, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Patent number: 10313984
    Abstract: A user terminal includes a receiver that receives, from a radio base station, indication information to indicate whether or not uplink signals of a plurality of user terminals are non-orthogonal-multiplexed; a processor that switches between transmission power control methods based on the indication information; and a transmitter that transmits an uplink signal by using a switched transmission power control method.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: June 4, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Patent number: 10251166
    Abstract: The present invention is designed to improve spectral efficiency in a radio communication system which can use non-orthogonal multiple access (NOMA). Steps are provided in which a radio base station configures one of a plurality of transmission mode including a first transmission mode, which groups a plurality of transmission methods including a transmission method to employ non-orthogonal multiple access (NOMA) and multiple-user multiple-input and multiple-output (MU-MIMO), and a second transmission mode, which groups a plurality of transmission methods including a transmission method to employ this NOMA and open-loop transmit diversity, and transmits a downlink signal for this user terminal based on the configured transmission mode.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: April 2, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Yoshihisa Kishiyama, Anass Benjebbour, Yuuya Saitou, Kenichi Higuchi
  • Patent number: 10205621
    Abstract: A transmitting apparatus and a transmitting method are provided. The transmitting apparatus comprises: an encoder configured to encode data for a plurality of user equipments into corresponding encoded signals, respectively; a modulator configured to perform a joint modulation on the encoded signals for the plurality of user equipments to generate modulated signals, wherein the modulator performs the joint modulation by mapping bits of the encoded signals for the plurality of user equipments to a symbol corresponding to each constellation point of a constellation map of the modulated signals so that respective constellation points satisfy a Gray mapping rule; a transmitter configured to transmit the modulated signals.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: February 12, 2019
    Assignee: NTT DoCoMo, Inc.
    Inventors: Chunlin Yan, Anass Benjebbour, Yang Lan, Anxin Li, Huiling Jiang
  • Patent number: 10098073
    Abstract: A radio base station applies non-orthogonal multiple access to a plurality of user terminals and transmits downlink signals, and this radio base station has a scheduling section that selects a user set to apply non-orthogonal multiple access to from candidate user sets, and selects a combination of a modulation and coding scheme and transmission power based on combinations of candidate transmission power. The radio base station includes a control section that decides whether or not the combination of the modulation and coding scheme and transmission power selected in the scheduling section is included in combinations that are stipulated in advance, and controls the scheduling section in accordance with the decision. A transmission section applies the combination of the modulation and coding scheme and transmission power to user terminals that are included in the user set selected in the scheduling section, and transmits the downlink signals.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: October 9, 2018
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Publication number: 20180255519
    Abstract: A user terminal includes a receiver that receives, from a radio base station, indication information to indicate whether or not uplink signals of a plurality of user terminals are non-orthogonal-multiplexed; a processor that switches between transmission power control methods based on the indication information; and a transmitter that transmits an uplink signal by using a switched transmission power control method.
    Type: Application
    Filed: April 30, 2018
    Publication date: September 6, 2018
    Applicant: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Patent number: 10020596
    Abstract: A base station performs the combination of digital precoding and analog beamforming. Transceiving antenna elements are classified into antenna groups. The analog beamformer includes branches corresponding to the antenna groups. Each branch includes sub-branches, and each sub-branch is connected to one antenna element. In self-calibration, after pilot signals are transmitted from antenna elements belonging to an antenna group and are received by antenna elements belonging to another antenna group, it is identifiable as to which antenna element transmitted each pilot signal. After pilot signals are received by antenna elements belonging to an antenna group, it is identifiable as to which antenna element received each pilot signal.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: July 10, 2018
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Satoshi Suyama
  • Publication number: 20180192435
    Abstract: A user apparatus according to an embodiment is provided. The user apparatus communicates with a base station in a wireless communication system. The user apparatus includes an obtaining unit configured to obtain resource allocation information in which downlink signal reception quality is associated with radio resources used for uplink signal transmission; a measurement unit configured to measure the downlink signal reception quality; and a transmission unit configured to determine a radio resource of the radio resources used for uplink signal transmission by comparing the resource allocation information with the measured downlink signal reception quality, and transmit an uplink signal by using the determined radio resource.
    Type: Application
    Filed: May 17, 2016
    Publication date: July 5, 2018
    Applicant: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Publication number: 20180160372
    Abstract: To suppress decrease in throughput even in the case where downlink transmit power is controlled, a user terminal according to one aspect of the present invention has a reception section that receives information on a candidate for downlink transmit power, a generating section that selects a plurality of candidates for downlink transmit power to generate CSI (Channel State Information) on the plurality of candidates for downlink transmit power, and a transmission section that transmits the CSI on the plurality of candidates for downlink transmit power.
    Type: Application
    Filed: June 7, 2016
    Publication date: June 7, 2018
    Applicant: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama