公开(公告)号：US20220116897A1

公开(公告)日：2022-04-14

申请号：US17557858

申请日：2021-12-21

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Daiki Takeda ,  Satoshi Nagata

IPC: H04W56/00 ,  H04L5/00 ,  H04W72/00 ,  H04L27/26

Abstract: A terminal is disclosed that includes a receiving section that receives a synchronization signal (SS) block, which includes a synchronization signal and a broadcast channel; and a control section that specifies identification information of the SS block, based on Demodulation Reference Signal (DMRS) that are multiplexed over a plurality of symbols for Physical Broadcast Channel (PBCH) in the SS block. In other aspects, a radio communication method is also disclosed.

公开(公告)号：US20220039010A1

公开(公告)日：2022-02-03

申请号：US17279842

申请日：2018-09-27

Applicant: NTT DOCOMO, INC.

Inventor： Daiki Takeda ,  Kazuaki Takeda

IPC: H04W52/02 ,  H04W68/00 ,  H04W72/12 ,  H04W72/04

Abstract: There are provided a user terminal, a radio base station, and a radio communication method that are capable of configuring a wake-up signal (WUS) that possibly ensures compatibility. The user terminal includes a reception section that receives a second wake-up signal which is multiplexed onto a first wake-up signal, using a prescribed multiplexing scheme, and is transmitted. Furthermore, the user terminal includes a control section that detects an identifier that is associated with the second wake-up signal, and controls reception of a control signal that is associated with the detected identifier.

公开(公告)号：US20220006579A1

公开(公告)日：2022-01-06

申请号：US17280172

申请日：2018-09-28

Applicant: NTT DOCOMO, INC.

Inventor： Runxin Wang ,  Wenjia Liu ,  Xiaolin Hou ,  Daiki Takeda

IPC: H04L5/00 ,  H04L27/26 ,  H04J13/00

Abstract: Provided by an embodiment of the present invention are a user equipment and base station that may be used in a wireless communication system, or a method performed by the user equipment and the base station. The user equipment according to the embodiment of the present invention includes: a receiving unit that is configured to receive multiple access signature information for the user equipment from a base station, wherein the multiple access signature information includes correction information indicating a reference signal sequence sent with respect to the user equipment; and a control unit that is configured to determine the reference signal sequence of the user equipment according to the received correction information.

公开(公告)号：US20210392505A1

公开(公告)日：2021-12-16

申请号：US17291827

申请日：2018-11-09

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Daisuke Murayama ,  Shohei Yoshioka ,  Daiki Takeda

IPC: H04W16/14 ,  H04W24/08 ,  H04W72/12 ,  H04W74/08

Abstract: A user terminal includes a receiving section that receives a first synchronization signal block in a first carrier to which listening is applied and monitors a first downlink control channel for scheduling first system information based on the first synchronization signal block, and a control section that determines resources of the first downlink control channel using a determination method different from a determination method of resources of a second downlink control channel for scheduling second system information in a second carrier to which the listening is not applied. According to one aspect of the present disclosure, appropriate communication can be performed in a band to which listening is applied.

公开(公告)号：US11115945B2

公开(公告)日：2021-09-07

申请号：US16608666

申请日：2017-04-28

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Kazuaki Takeda ,  Daiki Takeda ,  Satoshi Nagata

IPC: H04W56/00 ,  H04L5/00 ,  H04W72/00 ,  H04W72/04

Abstract: To transmit and receive signals in a radio communication system where communication is carried out based on different configurations from those of existing LTE systems, in accordance with one aspect of the present invention, a user terminal has a receiving section that receives a synchronization signal arranged in a first frequency domain and a broadcast channel arranged in a second frequency domain, which is wider than the first frequency domain, and a control section that controls a receiving process of DL signals, and the control section controls the receiving process on the assumption that, in at least part of given frequency domain that neighbors the first frequency domain, no DL signal is mapped or a specific DL signal is mapped.

公开(公告)号：US10972167B2

公开(公告)日：2021-04-06

申请号：US16557354

申请日：2019-08-30

Applicant: NTT DOCOMO, INC.

Inventor： Yoshihisa Kishiyama ,  Daiki Takeda

IPC: H04B7/04 ,  H04B7/06 ,  H04W16/28 ,  H04B17/24 ,  H04W24/10 ,  H04B17/318 ,  H04B7/0417 ,  H04B7/08 ,  H04B7/0413

Abstract: A user apparatus communicating with a base station in a radio communication system including the base station and the user apparatus includes a first receiving unit to receive multiple first reference signals transmitted from the base station; a detection unit to detect a specific antenna port via which the plurality of first reference signals is received, or a specific directivity pattern, among a plurality of directivity patterns generated by a plurality of antenna ports, in which the plurality of first reference signals are received; a measuring unit to measure reception power of each of the first reference signals; and a transmission unit to group the reception power of each of the first reference signals into one of groups of the specific antenna port and the specific directivity pattern via which the first reference signals are received to transmit the groups of the reception power to the base station.

公开(公告)号：US20200099567A1

公开(公告)日：2020-03-26

申请号：US16609157

申请日：2017-05-02

Applicant: NTT DOCOMO, INC.

Inventor： Daiki Takeda ,  Hiroki Harada ,  Satoshi Nagata

IPC: H04L27/26 ,  H04W56/00 ,  H04L27/00

Abstract: A user apparatus that uses a plurality of subcarrier spacings is disclosed. The user apparatus includes a receiver that receives a synchronization signal and system information. The user apparatus further includes a processor that determines, on a basis of the subcarrier spacings, positions of symbols to which periodic blocks including the synchronization signal and the system information are mapped. In other aspects, a base station apparatus and a communication method are also disclosed.

公开(公告)号：US20200059810A1

公开(公告)日：2020-02-20

申请号：US16609707

申请日：2017-05-02

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Daiki Takeda ,  Satoshi Nagata ,  Jing Wang

IPC: H04W24/10 ,  H04W48/10 ,  H04W56/00

Abstract: A terminal is disclosed including a receiver that receives a synchronization signal block including a synchronization signal and a broadcast channel, and a processor that, if specified information is notified to the terminal, derives, based on a timing of a serving cell, a synchronization signal block index for another cell. In other aspects, a radio communication method for a terminal is also disclosed.

公开(公告)号：US20190246453A1

公开(公告)日：2019-08-08

申请号：US16344501

申请日：2017-10-31

Applicant: NTT DOCOMO, INC.

Inventor： Yousuke Sano ,  Kazuki Takeda ,  Kazuaki Takeda ,  Daiki Takeda ,  Daisuke Murayama ,  Satoshi Nagata

IPC: H04W88/06 ,  H04W48/12 ,  H04W72/04 ,  H04L5/14 ,  H04L5/00 ,  H04W74/08

CPC classification number: H04W88/06 ,  H04L5/0082 ,  H04L5/1469 ,  H04W28/06 ,  H04W48/12 ,  H04W72/04 ,  H04W72/0446 ,  H04W74/0833

Abstract: Disclosed is a scheme of transmitting various types of radio signals for which interference between adjacent cells is considered in a radio communication system (for example, dynamic TDD) in which uplink communication and downlink communication can be dynamically switched. A feature of the present invention relates to user equipment including a transceiver that performs transmission and reception of a radio signal with a base station in accordance with a communication scheme in which uplink communication and downlink communication are dynamically switched and a signal processor that processes the radio signal, wherein the transceiver transmits a connection request signal generated by the signal processor in fixed uplink radio resources of the communication scheme.

公开(公告)号：US09769777B2

公开(公告)日：2017-09-19

申请号：US14910515

申请日：2014-07-07

Applicant: NTT DOCOMO, INC.

Inventor： Yuki Inoue ,  Daiki Takeda

IPC: H04L7/04 ,  H04W56/00 ,  H04B17/12 ,  H01Q1/24 ,  H01Q3/26 ,  H04B7/10 ,  H04B7/0413

CPC classification number: H04W56/0015 ,  H01Q1/246 ,  H01Q3/267 ,  H04B7/0413 ,  H04B7/10 ,  H04B17/12 ,  H04W56/0035

Abstract: When using a plurality of antenna elements, calibration is performed appropriately, while preventing processing time from increasing. A base station apparatus has a plurality of antenna elements; a combiner configured to receive and combine downlink transmission signals, each including a reference signal, from monitor ports provided corresponding to the antenna elements; a channel estimator configured to estimate a channel of the reference signal for each of the antenna elements; and a calibration controller configured to calculate a calibration correction value to be applied to each of the antenna elements based upon channel estimation result.