User terminal and radio communication method

Patent metadata

Field	Value
Publication number	US-11284401-B2
Application number	US-201816483303-A
Country	US
Kind code	B2
Filing date	Feb 2, 2018
Priority date	Feb 3, 2017
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

The present invention is designed to reduce the deterioration of communication quality and so on even when communication is performed by applying different configurations than in existing LTE systems. A receiving section that receives a downlink control channel, and a control section that controls receipt of the down link control channel, are provided, the downlink control channel is transmitted using downlink control channel elements including a plurality of resource element groups (REGs), and the control section controls receiving processes per REG group comprised of a plurality of REGs.

First claim

The invention claimed is:

1. A terminal comprising:
a receiver that receives a downlink control channel consisting of a plurality of control channel elements (CCEs) to which a plurality of resource element groups (REGs) are mapped in a control resource set; and
a processor that controls a demodulation process based on a demodulation reference signal that is allocated in at least one resource element included in a plurality of REG groups, each REG group including a plurality of REGs in the control resource set, and a same precoding being applied to different REG groups within a set of consecutive resource blocks in the control resource set,
wherein the terminal is configured with a REG group size of each REG group based on information that indicates the REG group size, the information being notified by RRC signaling.

2. A base station comprising:
a processor that controls transmission of a downlink control channel consisting of a plurality of control channel elements (CCEs) to which a plurality of resource element groups (REGs) are mapped in a control resource set; and
a transmitter that transmits the downlink control channel,
wherein the processor controls to allocate a demodulation reference signal to at least one resource element included in a plurality of REG groups, each REG group including a plurality of REGs in the control resource set, and a same precoding being applied to different REG groups within a set of consecutive resource blocks in the control resource set, and
wherein the processor notifies information that indicates a REG group size to a terminal by RRC signaling.

3. A radio communication method for a terminal, comprising:
receiving a downlink control channel consisting of a plurality of control channel elements (CCEs) to which a plurality of resource element groups (REGs) are mapped in a control resource set; and
controlling a demodulation process based on a demodulation reference signal that is allocated in at least one resource element included in a plurality of REG groups, each REG group including a plurality of REGs in the control resource set, and a same precoding being applied to different REG groups within a set of consecutive resource blocks in the control resource set,
wherein the terminal is configured with a REG group size of each REG group based on information that indicates the REG group size, the information being notified by RRC signaling.

Assignees

• Ntt Docomo Inc

Inventors

• Takeda Kazuki
• Nagata Satoshi
• Mu Qin
• Zhang Xu
• Liu Liu
• Jiang Huiling

Classifications

• H04W72/53 Primary

  based on regulatory allocation policies · CPC title

• H04L27/2602

  Signal structure · CPC title

• H04L5/0048 Primary

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04B7/0617

  for beam forming · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title