Method and apparatus for receiving downlink signal in wireless communication system

Patent metadata

Field	Value
Publication number	US-2021352649-A1
Application number	US-202117200344-A
Country	US
Kind code	A1
Filing date	Mar 12, 2021
Priority date	Mar 13, 2020
Publication date	Nov 11, 2021
Grant date	—

Abstract

A method and an apparatus of transmitting and receiving a downlink signal in a wireless communication system is disclosed. A method of receiving a downlink signal by a terminal in a wireless communication system according to an embodiment of the present disclosure includes: transmitting capability information of the terminal to a base station, wherein the capability information includes information related to a number of second type quasi-colocation reference signal (QCL RS) supported by the terminal based on a number of activated receiving means of the terminal, receiving, from the base station, configuration information for a plurality of first type QCL RSs and at least one second type QCL RS and receiving the downlink signal based on the configuration information, and based on the number of second type QCL RS being 1, the downlink signal may be received based on one specific second type QCL RS among the at least one second type QCL RS.

First claim

What is claimed is:

1 . A method of receiving a downlink signal by a terminal in a wireless communication system, the method comprising:
transmitting, to a base station, capability information of the terminal, wherein the capability information includes information related to a number of second type quasi-colocation reference signal (QCL RS) supported by the terminal based on a number of activated receiving means of the terminal; receiving, from the base station, configuration information for a plurality of first type QCL RSs and at least one second type QCL RS; and receiving the downlink signal based on the configuration information, wherein, based on the number of second type QCL RS being 1, the downlink signal is received based on one specific second type QCL RS among the at least one second type QCL RS.

2 . The method of claim 1 , wherein:
based on the number of activated receiving means being 1, the number of second type QCL RS is 1.

3 . The method of claim 2 , wherein:
the configuration information includes a plurality of transmission configuration indicator (TCI) states, each of the plurality of TCI states is configured with one first type QCL RS, only one TCI state among the plurality of TCI states is configured with one second type QCL RS, and the one second type QCL RS configured for the one TCI state is the one specific second type QCL RS.

4 . The method of claim 2 , wherein:
the configuration information includes a plurality of transmission configuration indicator (TCI) states, each of the plurality of TCI states is configured with one set of the first type QCL RS and the second type QCL RS, a plurality of second type QCL RSs configured for different TCI states are an identical RS, and the identical RS is the one specific second type QCL RS.

5 . The method of claim 2 , wherein:
the configuration information includes a plurality of transmission configuration indicator (TCI) states, each of the plurality of TCI states is configured with one set of the first type QCL RS and the second type QCL RS, and based on a plurality of second type QCL RSs configured for different TCI states being independent RSs, one second type QCL RS configured for a reference TCI state among the plurality of TCI states is the one specific second type QCL RS.

6 . The method of claim 2 , wherein:
the configuration information includes one transmission configuration indicator (TCI) state, the one TCI state is configured with a plurality of first type QCL RSs and one second type QCL RS, and the one second type QCL RS configured for the one TCI state is the one specific second type QCL RS.

7 . The method of claim 2 , wherein:
the configuration information includes one transmission configuration indicator (TCI) state, the one TCI state is configured with a plurality of sets of the first type QCL RS and the second type QCL RS, a plurality of second type QCL RSs of different sets are an identical RS, and the identical RS is the one specific second type QCL RS.

8 . The method of claim 2 , wherein:
the configuration information includes one transmission configuration indicator (TCI) state, the one TCI state is configured with a plurality of sets of the first type QCL RS and the second type QCL RS, based on a plurality of second type QCL RSs of different sets being independent RSs, a reference second type QCL RS among the plurality of second type QCL RSs is the one specific second type QCL RS.

9 . The method of claim 1 , wherein:
based on the number of second type QCL RS being more than or equal to 2, the downlink signal is received based on a plurality of second type QCL RSs.

10 . The method of claim 9 , wherein:
based on the number of activated receiving means being more than or equal to 2, the number of second type QCL RS is more than or equal to 2.

11 . The method of claim 10 , wherein:
the configuration information includes a plurality of transmission configuration indicator (TCI) states, and each of the plurality of TCI states is configured with one set of the first type QCL RS and the second type QCL RS.

12 . The method of claim 10 , wherein:
the configuration information includes one transmission configuration indicator (TCI) state, and the one TCI state is configured with a plurality of sets of the first type QCL RS and the second type QCL RS.

13 . The method of claim 1 , wherein:
the receiving means includes at least one of antenna array, panel, or beam.

14 . The method of claim 1 , wherein:
the number of activated receiving means is a number of receiving means activated in a specific time unit among at least one receiving means equipped with the terminal.

15 . The method of claim 1 , wherein:
the configuration information includes at least one of: information, signaled through a higher layer, for TCI state candidates including candidates of the first type QCL RS and the second type QCL RS, or information, indicated through downlink control information, for at least one TCI state among the TCI state candidates.

16 . The method of claim 1 , wherein:
the configuration information is configured based on the capability information of the terminal.

17 . The method of claim 1 , wherein:
the downlink signal includes at least one of demodulation reference signal (DMRS) related to physical downlink shared channel (PDSCH), DMRS related to physical downlink control channel (PDCCH), channel state information-reference signal (CSI-RS), tracking reference signal (TRS), or synchronization signal/physical broadcast channel (SS/PBCH) block.

18 . A terminal for receiving a downlink signal in a wireless communication system, the terminal comprising:
at least one transceiver; and at least one processor connected to the at least one transceiver, wherein the processor is configured to:
transmit, through the at least one transceiver to a base station, capability information of the terminal, wherein the capability information includes information related to a number of second type quasi-colocation reference signal (QCL RS) supported by the terminal based on a number of activated receiving means of the terminal;
receive, through the at least one transceiver from the base station, configuration information for a plurality of first type QCL RSs and at least one second type QCL RS; and
receive, through the at least one transceiver, the downlink signal based on the configuration information,
wherein, based on the number of second type QCL RS being 1, the downlink signal is received based on one specific second type QCL RS among the at least one second type QCL RS.

19 . A method of transmitting a downlink signal by a base station in a wireless communication system, the method comprising:
receiving, from a terminal, capability information of the terminal, wherein the capability information includes information related to a number of second type quasi-colocation reference signal (QCL RS) supported by the terminal based on a number of activated receiving means of the terminal; transmitting, to the terminal, configuration information for a plurality of first type QCL RSs and at least one second type QCL RS; and transmitting the downlink signal based on the configuration information, wherein, based on the number of second type QCL RS being 1, the downlink signal is received based on one specific second type QCL RS among the at least one second type QCL RS.

Assignees

• Lg Electronics Inc

Inventors

• Kim Hyungtae
• Kang Jiwon

Classifications

• H04W72/23

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

• H04W72/51 Primary

  based on terminal or device properties · CPC title

• H04L5/0023 Primary

  Time-frequency-space · CPC title

• H04L5/0051

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

• H04W8/24

  Transfer of terminal data · CPC title