公开(公告)号：US20210235453A1

公开(公告)日：2021-07-29

申请号：US17054045

申请日：2018-05-10

Applicant: NTT DOCOMO, INC.

Inventor： Yuki Matsumura ,  Satoshi Nagata ,  Jing Wang ,  Min Liu ,  Huiling Li ,  Xin Wang ,  Xiaolin Hou

IPC: H04W72/04 ,  H04W80/02 ,  H04L1/00

Abstract: To prevent deterioration of communication quality even when communication is performed by using a plurality of transmission points, one aspect of a user terminal according to the present disclosure includes: a receiving section that receives a physical shared channel transmitted from a plurality of transmission points, based on certain downlink control information; and a control section that determines at least one of rate matching, quasi-co-location, and a resource to be assigned for the physical shared channel transmitted from the plurality of transmission points, based on the downlink control information.

公开(公告)号：US20210211247A1

公开(公告)日：2021-07-08

申请号：US17057496

申请日：2018-05-22

Applicant: NTT DOCOMO, INC.

Inventor： Xin Wang ,  Xiaolin Hou

IPC: H04L5/00 ,  H04L1/00

Abstract: Embodiments of the present disclosure provide a precoding method, a decoding method, a transmitting device and a receiving device, where the precoding method applied to the transmitting device includes: acquiring data symbols to be transmitted and a transmission layer identifier corresponding to the data symbols to be transmitted; determining a modulo boundary for a precoding modulo operation according to the transmission layer identifier corresponding to the data symbols to be transmitted; processing the data symbols to be transmitted according to the determined modulo boundary to acquire transmission symbols.

公开(公告)号：US20210160891A1

公开(公告)日：2021-05-27

申请号：US16636576

申请日：2017-08-10

Applicant: NTT DOCOMO, INC.

Inventor： Shinpei Yasukawa ,  Satoshi Nagata ,  Shaozhen Guo ,  Xin Wang ,  Chongning Na ,  Xiaolin Hou

IPC: H04W72/10 ,  H04L5/00 ,  H04W24/10

Abstract: A user equipment in a wireless communication system includes a configuration information management unit configured to retain configuration information for transmitting a reference signal used for measuring interference in other user equipments, and a signal transmitter configured to transmit the reference signal based on the configuration information. When transmission of the reference signal contends with transmission or reception of another signal, the signal transmitter determines whether the reference signal is to be transmitted or not based on a predetermined priority level.

公开(公告)号：US20200229014A1

公开(公告)日：2020-07-16

申请号：US16649112

申请日：2018-09-18

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Yuichi Kakishima ,  Chongning Na ,  Xin Wang

IPC: H04W24/10 ,  H04W24/08 ,  H04W72/04

Abstract: A user terminal is disclosed including a receiving section that receives configuration information, which indicates allocation of an interference measurement resource in a unit resource; and a control section that controls measurement of a downlink signal based on the configuration information. In other aspects, a radio communication method is also disclosed.

公开(公告)号：US20170311321A1

公开(公告)日：2017-10-26

申请号：US15513356

申请日：2015-09-02

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Kazuki Takeda ,  Satoshi Nagata ,  Xin Wang ,  Chongning Na ,  Xiaolin Hou ,  Huiling Jiang

IPC: H04W72/04 ,  H04L5/00 ,  H04B7/06 ,  H04L5/22 ,  H04W88/08 ,  H04W88/02

CPC classification number: H04W72/0446 ,  H04B7/0626 ,  H04B7/0632 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/0057 ,  H04L5/006 ,  H04L5/0082 ,  H04L5/22 ,  H04L25/02 ,  H04L25/0204 ,  H04L25/0226 ,  H04W16/28 ,  H04W72/0413 ,  H04W88/02 ,  H04W88/08

Abstract: Techniques for implementing MIMO communication in accordance with reciprocity based precoding are provided. The present disclosure relates to a base station for implementing multi-antenna transmission that includes a communication control unit configured to control multi-antenna transmission with user equipment and a channel state estimation unit configured to estimate a channel state with the user equipment based on an uplink reference signal from the user equipment. The communication control unit causes the user equipment to transmit the uplink reference signal in an uplink shared channel in an uplink subframe.