Method for transmitting SRS and terminal therefor

Patent metadata

Field	Value
Publication number	US-11968145-B2
Application number	US-202218075933-A
Country	US
Kind code	B2
Filing date	Dec 6, 2022
Priority date	Jul 27, 2017
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

A method by which a terminal transmits an SRS can comprise the steps of: receiving, from a base station, first information indicating symbols to which the SRS is transmitted among a plurality of symbols, when the terminal is configured to perform antenna switching for an SRS transmission on the plurality of symbols; and transmitting the SRS on the indicated symbols, wherein the SRS is transmitted through antenna ports respectively corresponding to the indicated symbols, and the antenna ports respectively corresponding to the indicated symbols can be different from each other.

First claim

What is claimed is:

1. A method of transmitting a sounding reference signal (SRS) by a user equipment (UE), the method comprising:
receiving, from a base station (B S), SRS configuration information related to configuration of SRS resources for antenna switching;
transmitting, to the BS, a first SRS on a first antenna port of a first SRS resource based on the SRS configuration information; and
transmitting, to the B S, a second SRS on a second antenna port of a second SRS resource based on the SRS configuration information,
wherein the first SRS resource and the second SRS resource are configured within a same slot, and
wherein at least one empty symbol is configured between the first SRS resource and the second SRS resource based on a subcarrier spacing configured for the UE.

2. The method of claim 1 ,
wherein the at least one empty symbol is configured as a gap for the antenna switching.

3. The method of claim 1 , further comprising:
receiving, from the B S, information representing whether the at least one empty symbol is configured between the first SRS resource and the second SRS resource.

4. The method of claim 3 ,
wherein the information is received through radio resource control (RRC) signaling, a medium access control channel element (MAC CE) or downlink control information (DCI).

5. The method of claim 1 ,
wherein the first SRS resource and the second SRS resource configured within a plurality of consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols of the same slot.

6. The method of claim 1 ,
wherein the SRS configuration information further includes a number of antenna ports for transmission of the SRS.

7. A user equipment (UE) for transmitting a sounding reference signal (SRS), the UE comprising:
at least one transceiver;
at least one processor; and
at least one memory operably connected to the at least one processor and configured to store instructions for causing the at least one processor to perform a specific operation when executed,
wherein the specific operation comprises:
receiving, from a base station (BS), SRS configuration information related to configuration of SRS resources for antenna switching;
transmitting, to the BS, a first SRS on a first antenna port of a first SRS resource based on the SRS configuration information; and
transmitting, to the BS, a second SRS on a second antenna port of a second SRS resource based on the SRS configuration information,
wherein the first SRS resource and the second SRS resource are configured within a same slot, and
wherein at least one empty symbol is configured between the first SRS resource and the second SRS resource based on a subcarrier spacing configured for the UE.

8. The UE of claim 7 ,
wherein the at least one empty symbol is configured as a gap for the antenna switching.

9. The UE of claim 7 ,
wherein the specific operation further comprises receiving, from the BS, information representing whether the at least one empty symbol is configured between the first SRS resource and the second SRS resource.

10. The UE of claim 9 ,
wherein the information is received through radio resource control (RRC) signaling, a medium access control channel element (MAC CE) or downlink control information (DCI).

11. The UE of claim 7 ,
wherein the first SRS resource and the second SRS resource configured within a plurality of consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols of the same slot.

12. The UE of claim 7 ,
wherein the SRS configuration information further includes a number of antenna ports for transmission of the SRS.

13. A method of receiving a sounding reference signal (SRS) by a base station (BS), the method comprising:
transmitting, to a user equipment (UE), SRS configuration information related to configuration of SRS resources for antenna switching;
receiving, from the UE, a first SRS on a first antenna port of a first SRS resource based on the SRS configuration information; and
receiving, from the UE, a second SRS on a second antenna port of a second SRS resource based on the SRS configuration information,
wherein the first SRS resource and the second SRS resource are configured within a same slot, and
wherein at least one empty symbol is configured between the first SRS resource and the second SRS resource based on a subcarrier spacing configured for the UE.

14. A base station (BS) for receiving a sounding reference signal (SRS), the BS comprising:
at least one transceiver;
at least one processor; and
at least one memory operably connected to the at least one processor and configured to store instructions for causing the at least one processor to perform a specific operation when executed,
wherein the specific operation comprises:
transmitting, to a user equipment (UE), SRS configuration information related to configuration of SRS resources for antenna switching;
receiving, from the UE, a first SRS on a first antenna port of a first SRS resource based on the SRS configuration information; and
receiving, from the UE, a second SRS on a second antenna port of a second SRS resource based on the SRS configuration information,
wherein the first SRS resource and the second SRS resource are configured within a same slot, and
wherein at least one empty symbol is configured between the first SRS resource and the second SRS resource based on a subcarrier spacing configured for the UE.

Assignees

• Lg Electronics Inc

Inventors

• Choi Kukheon
• Kang Jiwon
• Kim Kyuseok
• Ahn Minki
• Lee Kilbom

Classifications

• H04L5/0051 Primary

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

• H04L1/06

  using space diversity · CPC title

• H04L5/0023

  Time-frequency-space · CPC title

• H04L5/0094 Primary

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

• H04L25/0224

  using sounding signals · CPC title