Kazuaki Takeda 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).
Abstract: A user equipment in a radio communication system including the user equipment and a base station, including: an uplink transmission power information calculation unit configured to calculate uplink transmission power information of a serving cell using a parameter that may be changed dynamically; and a signal transmission unit configured to include, in control information in which the uplink transmission power information is set, identification information for identifying a parameter used for calculation of the uplink transmission power information, and to transmit the control information in which the identification information is included to the base station.
Abstract: A user terminal receives a downstream link data signal, a demodulation reference signal for demodulating the downstream link data signal, and a downstream link signal including a downstream link control signal; calculates a channel estimation value using the demodulation reference signal; demodulates the downstream link data signal using the channel estimation value; and demodulates the downstream link control signal using the channel estimation value calculated from the demodulation reference signal mapped to a symbol before a symbol to which the downstream link control signal is mapped in a sub-frame.
Abstract: To improve an avoidance rate of collision of data transmitted according to a listening result, a user terminal includes: a reception section that, when an idle state is detected by listening in a radio base station, receives a transmission request signal addressed to each of one or more user terminals from the radio base station; a transmission section that transmits a response signal for the transmission request signal; and a control section that controls reception of downlink data that is multiplexed and transmitted from the radio base station within a given duration after the listening in response to the response signal.
Abstract: The present invention is designed to properly control the transmission of UL signals transmitted in response to DL transmission, in future radio communication systems. A receiving section that receives downlink control information and downlink data, and a control section that controls the transmission of an acknowledgment signal in response to the downlink data, are provided, and the control section controls the timing for transmitting the delivery acknowledgment signal based on timing information included in the downlink control information.
September 21, 2017
Date of Patent:
February 2, 2021
NTT DOCOMO, INC.
Kazuki Takeda, Kazuaki Takeda, Satoshi Nagata, Lihui Wang, Qin Mu, Liu Liu
Abstract: A reception apparatus includes: a receiving section that receives a plurality of request signals that have been transmitted by respectively using a plurality of precoding based on a listening result of a first frequency range; a transmitting section that transmits a response signal that is based on received quality of the plurality of request signals; and a control section that controls reception of data transmitted in the first frequency range by using precoding determined based on the response signal among the plurality of precoding.
Abstract: An occupant detection system may detect a state of an occupant in a vehicle compartment. The occupant detection system may photograph the vehicle compartment and generate an image. The occupant detection system may change an attitude in order to change a position of an imaging region within the vehicle compartment. The occupant detection system may estimate the attitude based on information included in the image and control an operation based on the estimated attitude. The sensor may be provided by an infrared temperature sensor. The image may be provided by a thermal image showing a temperature distribution of the vehicle compartment. The occupant detection system may store a correspondence relationship between a position of a specific temperature boundary included in the thermal image and the attitude. The occupant detection system may estimate the attitude based on the correspondence relationship.
Abstract: A method of acquiring Channel State Information (CSI) in a wireless communication system includes transmitting, from a Base Station (BS) to a User Equipment (UE), a resource setting including time-domain behavior of CSI-Reference Signals (RSs) transmission that designates aperiodic, periodic, or semi-persistent; and transmitting, from the BS to the UE, the CSI-RSs based on the designated aperiodic, periodic, or semi-persistent. The resource setting includes precoding information that indicates whether precoders applied to the CSI-RSs is the same or different. The resource setting includes periodicity and a timing offset value of the CSI-RS transmission when the periodic or the semi-persistent is designated. The resource setting includes frequency-domain information that designates a wideband or a partial band used for the CSI-RS transmission. The resource setting includes a transmission bandwidth of the CSI-RS transmission when the partial band is designated.
Abstract: A transmitting apparatus that transmits data in a first frequency band is provided with a transmitting section that transmits a transmission request signal of the data in the first frequency band, a receiving section that receives a response signal to the transmission request signal in a second frequency band, and a control section that controls transmission of the data based on the response signal.
Abstract: The present invention is designed to reduce the latency due to collisions in UL transmission when contention-based UL data transmission is employed. A user terminal communicates using a second transmission time interval (TTI), having a shorter TTI duration than a first TTI, and this user terminal has a transmission section that transmits multiple UL data without a UL grant from a radio base station, and a control section that controls allocation of the multiple UL data individually, and the control section applies frequency hopping to allocate the multiple UL data to resources of different second TTIs.
Abstract: Provided is an uplink signal configuration for a wireless communication system capable of performing uplink transmission by a plurality of communication schemes. A user equipment capable of performing uplink transmission by a plurality of communication schemes, includes: a transmission/reception unit configured to transmit and receive a radio signal to and from a base station; and a signal processing unit configured to process the radio signal, wherein the signal processing unit generates an uplink control signal and an uplink data signal according to a first uplink signal configuration mapping the uplink control signal to an uplink control channel and mapping the uplink data signal to an uplink shared channel, and wherein the transmission/reception unit simultaneously transmits the uplink control signal and the uplink data signal generated according the first uplink signal configuration according to a selected communication scheme.
Abstract: A user terminal is a user terminal of a first category that supports a channel bandwidth equal to or narrower than an indispensable channel bandwidth defined per subcarrier spacing for a user terminal of a second category, and includes: a reception section that receives at least one of a synchronization signal and a broadcast channel; and a control section that controls reception of system information that is mapped in a given bandwidth equal to or narrower than the indispensable channel bandwidth.
Abstract: In order to realize proper communication in the next-generation communication system, a user terminal that performs communication through a communication system in which a plurality of communication parameters is set, includes: a reception section that receives information on a partial resource used for the communication; and a control section that controls UL transmission and/or DL reception using a predetermined communication parameter, based on the information on the partial resource. The reception section receives the information on the partial resource using higher layer signaling, a common control channel which is common to the plurality of communication parameters, or a specific control channel dedicated to each of the communication parameters.
Abstract: A system for supporting smooth mobility of a mobile terminal apparatus between a plurality of local areas that are arranged in a wide area is disclosed. The system includes a wide area base station apparatus that covers a wide area, a local area base station apparatus that covers a local area arranged in the wide area, and a mobile terminal apparatus that can communicate with the wide area base station apparatus and the local area base station apparatus, and is configured to scramble a data signal and a reference signal by a scrambling sequence that is common between a plurality of local areas in communication between the local area base station apparatus and the mobile terminal apparatus.
Abstract: A terminal is disclosed that includes a receiver that receives higher layer signaling that indicates a periodic time period in which uplink transmission is not performed and a processor that monitors downlink control information for scheduling system information in the time period. In other aspects, a radio communication method and a base station are disclosed.
Abstract: There is provided user equipment of a radio communication system including a base station and the user equipment, the user equipment includes a receiver that receives a plurality of user equipment identifier candidates from the base station; a selector that selects one user equipment identifier from the plurality of user equipment identifier candidates; and a transmitter that transmits a signal of an uplink shared channel using the one user equipment identifier that is selected, without performing contention resolution of the user equipment identifier used by the user equipment with the base station.
Abstract: The present invention provides a method for configuring a hybrid automatic repeat request (HARQ) mode in a base station, a communication method for use by user terminal supporting communication capabilities of the first type, a base station and user terminal. This user terminal includes a transmission section that transmits information about a capability for supporting HARQ bundling, to a radio base station, and the transmission section transmits bundled HARQ-ACKs to the radio base station based on the capability.
Abstract: The present invention is designed to make it possible to acquire broadcast information in a suitable manner. According to one aspect of the present invention, a user terminal has a receiving section that receives a synchronization signal and a broadcast signal, and a control section that specifies a frequency hopping pattern that is applied to the broadcast signal based on the synchronization signal.
Abstract: A user terminal according to one aspect of the present disclosure includes: a transmission section that transmits an uplink control channel over multiple slots; and a control section that, when changing an active Bandwidth Part (BWP) during the transmission of the uplink control channel, controls the transmission of the uplink control channel after the BWP changing. According to the one aspect of the present disclosure, it is possible to prevent a communication throughput from lowering even when a BWP is switched.
Abstract: A user equipment is disclosed including a processor that selects a parameter set from a parameter set group generated by grouping radio parameters used for transmission of an uplink signal or reception of a downlink signal, and selects a radio parameter to be applied to the uplink signal or the downlink signal from the selected parameter set, and a transceiver that performs the transmission of the uplink signal or the reception of the downlink signal using the selected radio parameter.
March 30, 2017
September 24, 2020
NTT DOCOMO, INC.
Kazuaki Takeda, Yousuke Sano, Kazuki Takeda, Satoshi Nagata, Qin Mu, Liu Liu
Abstract: A terminal is disclosed that includes a transmitter that performs uplink (UL) transmission without a UL grant using a resource configured by higher layer signaling, a receiver that receives retransmission command information, which indicates a retransmission command for the UL transmission, and a processor that controls a resource used for retransmission of the UL transmission by units of symbols based on the retransmission command information. In other aspects, a base station and a radio communication method for a terminal are disclosed.