公开(公告)号：US20190190763A1

公开(公告)日：2019-06-20

申请号：US16322581

申请日：2017-08-03

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Lihui Wang ,  Liu Liu ,  Huiling Jiang ,  Can Li ,  Yong Li ,  Wenbo Wang

IPC: H04L27/26 ,  H04L5/00 ,  H04W28/06 ,  H04W72/04

CPC classification number: H04L27/2662 ,  H04L5/0053 ,  H04L27/2676 ,  H04W28/06 ,  H04W72/04 ,  H04W72/0413

Abstract: The present invention is designed to properly transmit demodulation reference signals for UL data channels in short TTIs. A user terminal according to one aspect of the present invention has a transmission section that transmits a demodulation reference signal for an uplink (UL) data channel, and a control section that controls the transmission of the demodulation reference signal, and, when the UL data channel is transmitted in a second transmission time interval (TTI), which is comprised of a smaller number of symbols than a first TTI, the control section maps the demodulation reference signal to a symbol that is selected based on the arrangement pattern of the second TTI.