Method for transmitting and receiving reference signal and apparatus therefor

Patent metadata

Field	Value
Publication number	US-10587390-B2
Application number	US-201916397671-A
Country	US
Kind code	B2
Filing date	Apr 29, 2019
Priority date	Apr 27, 2018
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

A method of receiving, by a user equipment (UE), a reference signal in a wireless communication system. The method includes: receiving downlink control information (DCI) for scheduling downlink data in a first transmission time interval (TTI); acquiring, from the DCI, information related to whether the reference signal is included in the first TTI in which the downlink data is scheduled; and receiving, in the first TTI, the reference signal for the first TTI based on the information related to whether the reference signal is included in the first TTI. The method further includes, based on the downlink data scheduled to be repeatedly transmitted in the first TTI and at least one second TTI: receiving, in each of the at least one second TTI, a reference signal for the each of the at least one second TTI.

First claim

What is claimed is:

1. A method of receiving, by a user equipment (UE), a reference signal in a wireless communication system, the method comprising:
receiving downlink control information (DCI) for scheduling downlink data in a first transmission time interval (TTI);
acquiring, from the DCI, information related to whether the reference signal is included in the first TTI in which the downlink data is scheduled;
receiving, in the first TTI, the reference signal for the first TTI based on the information related to whether the reference signal is included in the first TTI; and
based on the downlink data scheduled to be repeatedly transmitted in the first TTI and at least one second TTI:
receiving, in each of the at least one second TTI, a reference signal for the each of the at least one second TTI.

2. The method of claim 1 , wherein the information related to whether the reference signal is included in the first TTI comprises a fixed value.

3. The method of claim 2 , wherein the fixed value in the information related to whether the reference signal is included in the first TTI is used to inform that the reference signal for the first TTI is included in the first TTI.

4. The method of claim 1 , further comprising:
acquiring, from the DCI, information regarding a number of times that the downlink data is scheduled to be repeatedly transmitted in the first TTI and the at least one second TTI.

5. The method of claim 4 , wherein based on the downlink data scheduled to be repeatedly transmitted in the first TTI and in the at least one second TTI:
the number of times that the downlink data is scheduled to be repeatedly transmitted is greater than 1.

6. The method of claim 1 , wherein the first TTI and the at least one second TTI are short TTIs.

7. The method of claim 1 , wherein the at least one second TTI comprises a plurality of second TTIs that are consecutively arranged in time with the first TTI.

8. An apparatus configured to receive a reference signal in a wireless communication system, the apparatus comprising:
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
receiving downlink control information (DCI) for scheduling downlink data in a first transmission time interval (TTI);
acquiring, from the DCI, information related to whether the reference signal is included in the first TTI in which the downlink data is scheduled;
receiving, in the first TTI, the reference signal for the first TTI, based on the information related to whether the reference signal is included in the first TTI; and
based on the downlink data scheduled to be repeatedly transmitted in the first TTI and at least one second TTI:
receiving, in each of the at least one second TTI, a reference signal for the each of the at least one second TTI.

9. The apparatus of claim 8 , wherein the information related to whether the reference signal is included in the first TTI comprises a fixed value.

10. The apparatus of claim 9 , wherein the fixed value in the information related to whether the reference signal is included in the first TTI is used to inform that the reference signal for the first TTI is included in the first TTI.

11. The apparatus of claim 8 , further comprising:
acquiring, from the DCI, information regarding a number of times that the downlink data is scheduled to be repeatedly transmitted in the first TTI and the at least one second TTI.

12. The apparatus of claim 11 , wherein the number of times that the downlink data is scheduled to be repeatedly transmitted in the first TTI and the at least one second TTI is greater than 1.

13. The apparatus of claim 8 , wherein the first TTI and the at least one second TTI are short TTIs.

14. The apparatus of claim 8 , wherein the at least one second TTI comprises a plurality of second TTIs that are consecutively arranged in time with the first TTI.

15. The apparatus of claim 8 , wherein the apparatus comprises a user equipment (UE) configured to receive the reference signal in the wireless communication system, the UE comprising at least one transceiver, the at least one processor, and the at least one computer memory.

16. A method of transmitting, by a base station, a reference signal in a wireless communication system, the method comprising:
transmitting downlink control information (DCI) for scheduling downlink data in a first transmission time interval (TTI), the DCI comprising information related to whether the reference signal is included in the first TTI in which the downlink data is scheduled;
transmitting, in the first TTI, the reference signal for the first TTI based on the information related to whether the reference signal is included in the first TTI; and
based on the downlink data scheduled to be repeatedly transmitted in the first TTI and at least one second TTI:
transmitting, in each of the at least one second TTI, a reference signal for the each of the at least one second TTI.

17. A base station (BS) configured to transmit a reference signal in a wireless communication system, the BS comprising:
at least one transceiver;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
transmitting, through the at least one transceiver, downlink control information (DCI) for scheduling downlink data in a first transmission time interval (TTI), the DCI comprising information related to whether the reference signal is included in the first TTI in which the downlink data is scheduled;
transmitting, in the first TTI through the at least one transceiver, the reference signal for the first TTI based on the information related to whether the reference signal is included in the first TTI; and
based on the downlink data scheduled to be repeatedly transmitted in the first TTI and at least one second TTI:
transmitting, in each of the at least one second TTI through the at least one transceiver, a reference signal for the each of the at least one second TTI.

Assignees

• Lg Electronics Inc

Inventors

• Kwak Kyuhwan
• Lee Seungmin
• Yi Yunjung
• Lee Hyunho

Classifications

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04L5/0082 Primary

  at predetermined intervals · CPC title

• H04L5/005

  of common pilots, i.e. pilots destined for multiple users or terminals · CPC title

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04L5/0094 Primary

  Indication of how sub-channels of the path are allocated · CPC title