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公开(公告)号：US20210282162A1
公开(公告)日：2021-09-09
申请号：US16319535
申请日：2017-07-24
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang
Abstract: The present invention is designed to support appropriate CSI measurements and reporting even when shortened TTIs and/or processing time reduction are introduced. A user terminal according to one aspect of the present invention communicates in a cell, which uses a shortened transmission time interval (TTI) that has a shorter TTI duration than 1 ms and/or in a cell in which communication is controlled by applying shortened processing time that is shorter than processing time in an existing LTE system, and this user terminal has a measurement section that measures channel state information (CSI) by using a CSI reference resource, and a transmission section that transmits the CSI in a given subframe, and the CSI reference resource is found in a subframe that is located a period before the given subframe, the period being shorter than a given time period.
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公开(公告)号：US20210281458A1
公开(公告)日：2021-09-09
申请号：US17054062
申请日：2018-05-11
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Shaozhen Guo , Lihui Wang , Xiaolin Hou
Abstract: A user terminal according to one aspect of the present disclosure includes: a transmitting/receiving section that performs transmission and reception by using a first Component Carrier (CC) that uses a first Sub-Carrier Spacing (SCS), and a second CC that uses a second SCS larger than the first SCS; and a control section that, when a semi-static Hybrid Automatic Repeat reQuest Acknowledgement (HARQ-ACK) codebook related to both of the first CC and the second CC is transmitted on an uplink shared channel of the second CC, deletes an HARQ-ACK bit corresponding to a downlink shared channel candidate that does not satisfy a requirement of processing time. According to one aspect of the present disclosure, it is possible to appropriately transmit HARQ-ACK even when a semi-static HARQ-ACK codebook is configured.
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公开(公告)号：US11115858B2
公开(公告)日：2021-09-07
申请号：US15558514
申请日：2016-03-18
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata
Abstract: HARQ-ACK is appropriately transmitted during enhanced carrier aggregation. A user terminal that can communicate with a radio base station by using six or more component carriers includes: a receiving section that receives scheduling information transmitted from the radio base station; a control section that determines based on the scheduling information to apply spatial bundling of a transmission acknowledgement signal only to a component carrier that the spatial bundling is applicable to; and a transmission section that transmits the transmission acknowledgement signal by using a PUCCH format 3.
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公开(公告)号：US20210273771A1
公开(公告)日：2021-09-02
申请号：US17257728
申请日：2018-07-06
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Shohei Yoshioka , Satoshi Nagata , Shaozhen Guo , Lihui Wang , Xiaolin Hou
Abstract: A user terminal according to one aspect of the present disclosure includes: a receiving section that receives downlink control information using a certain downlink control information format; and a control section that determines activation or deactivation of a secondary cell, based on the downlink control information. According to one aspect of the present disclosure, it is possible to control activation at higher speed.
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公开(公告)号：US20210266939A1
公开(公告)日：2021-08-26
申请号：US17261332
申请日：2018-07-20
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang , Xiaolin Hou
IPC: H04W72/12
Abstract: To appropriately control transmission of a transmission acknowledgement signal even when a transmission candidate domain of a PDSCH is configured over a plurality of slots, a base station according to one aspect of the present disclosure includes: a transmission section that transmits 1 or more downlink shared channels to which candidate occasions are configured over a plurality of slots; and a control section that controls scheduling of the downlink shared channels such that the downlink shared channels associated with different transport blocks are not allocated to 1 slot.
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Patent Agency Ranking
公开(公告)号：US11101911B2
公开(公告)日：2021-08-24
申请号：US16071951
申请日：2017-01-25
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata
Abstract: Communication is performed by using an uplink control channel of a configuration matching each shortened TTI. A user terminal according to the present invention includes: a transmission section that transmits uplink control information via an uplink control channel by using a shortened TTI configured by a smaller number of symbols than symbols of a normal TTI; and a control section that controls the transmission of the uplink control information, and the control section transmits the uplink control information by using a resource block subjected to frequency hopping between slots in the second TTI, and maps a demodulation reference signal on at least one symbol that configures the slots.
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公开(公告)号：US20210259004A1
公开(公告)日：2021-08-19
申请号：US17253431
申请日：2018-06-18
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang , Xiaolin Hou
Abstract: A user terminal according to an aspect of the present disclosure includes: a receiving section that receives a downlink shared channel repetitively transmitted from a plurality of transmission and reception points; and a control section that controls transmission of delivery acknowledgment information at each repetition of the downlink shared channel or transmission of delivery acknowledgment information generated based on all the repetitions of the downlink shared channel, using an uplink control channel to at least one of the plurality of transmission and reception points.
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公开(公告)号：US20210235482A1
公开(公告)日：2021-07-29
申请号：US17054443
申请日：2018-05-11
Applicant: NTT DOCOMO, INC.
Inventor： Shohei Yoshioka , Kazuki Takeda , Satoshi Nagata , Lihui Wang , Shaozhen Guo
Abstract: To appropriately generate HARQ-ACK codebook even when transmission timings of delivery confirmation signals are configured flexibly, a user terminal according to an aspect of the present disclosure includes a transmitting section that transmits a delivery confirmation signal for a downlink shared channel, based on downlink control information used for scheduling the downlink shared channel, and a control section that determines codebook for the delivery confirmation signal, based on at least one of a transmission slot of the delivery confirmation signal and an uplink control channel resource for the delivery confirmation signal that are indicated by the downlink control information.
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公开(公告)号：US20210227503A1
公开(公告)日：2021-07-22
申请号：US17054386
申请日：2018-05-11
Applicant: NTT DOCOMO, INC.
Inventor： Shohei Yoshioka , Yuki Matsumura , Kazuki Takeda , Satoshi Nagata
Abstract: To appropriately transmit uplink control information even when allocations of uplink control channels used for transmission of the uplink control information overlap each other, a user terminal according to one aspect of the present disclosure includes a transmitting section that transmits transmission confirmation signals for downlink shared channels by using uplink control channel resources, and a control section that determines an uplink control channel to be applied to transmission of a plurality of the transmission confirmation signals, based on a certain selection criterion, when the uplink control channel resources for the plurality of the transmission confirmation signals overlap each other in a time domain.
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80.发明授权公开(公告)号：US11071132B2
公开(公告)日：2021-07-20
申请号：US16097674
申请日：2017-05-01
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata
IPC: H04W72/12
Abstract: A terminal is disclosed including a receiver that monitors a downlink control channel which is allocated in units of subframes and receives downlink control information; and a processor that controls at least one of data transmission and reception, in units of transmission time intervals (TTIs), based on the downlink control information. Additionally, the processor controls at least one of transmission and reception, assuming that at least one of the subframe duration and the TTI duration is variable; and skips at least of monitoring the downlink control channel and transmitting an uplink control channel, during at least one of the data transmission and reception.
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