User terminal

Patent metadata

Field	Value
Publication number	US-11350441-B2
Application number	US-201817255255-A
Country	US
Kind code	B2
Filing date	Jun 28, 2018
Priority date	Jun 28, 2018
Publication date	May 31, 2022
Grant date	May 31, 2022

Abstract

In order to appropriately configure a Hybrid Automatic Repeat Request (HARQ) process even when communication is performed using a plurality of transmission points, one aspect of a user terminal of the present disclosure includes: a receiving section that receives one or more pieces of downlink control information used for scheduling of downlink shared channels, which are transmitted from a plurality of transmission points, by monitoring a downlink control channel; and a control section that detects a HARQ process number, which is indicated by a HARQ process number field included in the downlink control information and which is managed by one or more independent HARQ entities for each cell.

First claim

The invention claimed is:

1. A terminal comprising:
a receiving section that receives one or more downlink control channels used for scheduling of a plurality of downlink shared channels respectively transmitted using a plurality of transmission configuration information (TCI); and
a control section that detects, based on a hybrid automatic repeat request (HARQ) process number field included in downlink control information transmitted on the downlink control channel, a HARQ process number managed by one or more independent HARQ entities for each cell.

2. The terminal according to claim 1 , wherein the receiving section receives the downlink control information, and wherein a HARQ process number managed by an independent HARQ entity for each cell is mapped to a HARQ process number field included in the downlink control information.

3. The terminal according to claim 1 , wherein the receiving section receives a plurality of the downlink control channels, and wherein a HARQ process number managed by an independent entity for each cell is mapped to a HARQ process number field included in downlink control information respectively transmitted on the plurality of the downlink control channels.

4. The terminal according to claim 3 , wherein whether or not the plurality of downlink shared channels is scheduled by a plurality of downlink control channels is configured by higher layer signaling.

5. A radio communication method for a terminal, comprising:
receiving one or more downlink control channels used for scheduling of a plurality of downlink shared channels respectively transmitted using a plurality of transmission configuration information (TCI); and
detecting, based on a hybrid automatic repeat request (HARQ) process number field included in downlink control information transmitted on the downlink control channel, a HARQ process number managed by one or more independent HARQ entities for each cell.

6. A base station comprising:
a transmitting section that transmits one or more downlink control channels used for scheduling of a plurality of downlink shared channels respectively transmitted using a plurality of transmission configuration information (TCI); and
a control section that controls, by using a hybrid automatic repeat request (HARQ) process number field included in downlink control information transmitted on the downlink control channel, reporting of a HARQ process number managed by one or more independent HARQ entities for each cell.

7. A system comprising a terminal and a base station, wherein
the terminal comprises:
a receiving section that receives one or more downlink control channels used for scheduling of a plurality of downlink shared channels respectively transmitted using a plurality of transmission configuration information (TCI); and
a control section of the terminal that detects, based on a hybrid automatic repeat request (HARQ) process number field included in downlink control information transmitted on the downlink control channel, a HARQ process number managed by one or more independent HARQ entities for each cell, and

the base station comprises:
a transmitting section that transmits the one or more downlink control channels; and
a control section of the base station that controls, by using the HARQ process number field included in the downlink control information, reporting of the HARQ process number.

Assignees

• Ntt Docomo Inc

Inventors

• Matsumura Yuki
• Nagata Satoshi
• Wang Jing
• Li Huiling
• Hou Xiaolin

Classifications

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/1273

  of downlink data flows · CPC title

• H04W72/232

  the control data signalling from the physical layer, e.g. DCI signalling · CPC title

• H04L1/1858

  Transmission or retransmission of more than one copy of acknowledgement message · CPC title

• H04W28/04

  Error control · CPC title