US-12621095-B2 - Method and device for transmitting or receiving sounding reference signal in wireless communication system

US12621095B2US 12621095 B2US12621095 B2US 12621095B2US-12621095-B2

Abstract

Disclosed are a method and a device for transmitting or receiving a sounding reference signal (SRS) in a wireless communication system. A method for transmitting a sounding reference signal (SRS) according to an embodiment of the present disclosure may comprise the steps of: receiving, from a base station, downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) and triggering transmission of the SRS; and transmitting the PUSCH and the SRS to the base station on the basis of the DCI. A transmission bandwidth of the SRS may be determined on the basis of frequency resource allocation information for transmission of the PUSCH.

Inventors

Seongwon GO
Suckchel YANG
Jiwon Kang
Seonwook Kim

Assignees

LG ELECTRONICS INC.

Dates

Publication Date: 20260505
Application Date: 20210604
Priority Date: 20200609

Claims (16)

1 . A method comprising: receiving, by a terminal, from a base station, downlink control information for scheduling a physical uplink shared channel and triggering transmission of an aperiodic sounding reference signal; and transmitting, to the base station, the physical uplink shared channel and the aperiodic sounding reference signal based on the downlink control information, wherein the downlink control information includes frequency resource allocation information for transmission of the physical uplink shared channel, and wherein a transmission bandwidth of the aperiodic sounding reference signal is determined based on a frequency resource allocated by the frequency resource allocation information and a frequency resource allocation type for the physical uplink shared channel.
2 . The method of claim 1 , wherein based on the frequency resource allocation type for the physical uplink shared channel being uplink resource allocation type 0, the transmission bandwidth of the aperiodic sounding reference signal is determined as a contiguous bandwidth including the lowest resource block group and the highest resource block group for transmission of the physical uplink shared channel.
3 . The method of claim 1 , wherein based on the frequency resource allocation type for the physical uplink shared channel being uplink resource allocation type 0, the transmission bandwidth of the aperiodic sounding reference signal is determined as a contiguous bandwidth including all resource block groups except for one or more resource block groups allocated for transmission of the physical uplink shared channel.
4 . The method of claim 1 , wherein based on the frequency resource allocation type for the physical uplink shared channel being uplink resource allocation type 0, the transmission bandwidth of the aperiodic sounding reference signal is determined as a contiguous bandwidth including all contiguous resource block groups having the largest bandwidth among resource block groups excluding one or more resource block groups allocated for transmission of the physical uplink shared channel.
5 . The method of claim 1 , wherein based on the frequency resource allocation type for the physical uplink shared channel being uplink resource allocation type 1, the transmission bandwidth of the aperiodic sounding reference signal is determined as a contiguous bandwidth including all one or more contiguous resource blocks for transmission of the physical uplink shared channel.
6 . The method of claim 1 , wherein based on the frequency resource allocation type for the physical uplink shared channel being uplink resource allocation type 1, the transmission bandwidth of the aperiodic sounding reference signal is determined as a contiguous bandwidth including all resource blocks except for one or more resource blocks allocated for transmission of the physical uplink shared channel.
7 . The method of claim 1 , wherein based on the frequency resource allocation type for the physical uplink shared channel being uplink resource allocation type 1, the transmission bandwidth of the aperiodic sounding reference signal is determined as a contiguous bandwidth including all contiguous resource blocks having the largest bandwidth among resource blocks excluding one or more resource blocks allocated for transmission of the physical uplink shared channel.
8 . The method of claim 1 , wherein based on the frequency resource allocation type for the physical uplink shared channel being uplink resource allocation type 2, the transmission bandwidth of the aperiodic sounding reference signal is determined as a contiguous bandwidth including all one or more resource block sets allocated for transmission of the physical uplink shared channel.
9 . The method of claim 1 , wherein based on the frequency resource allocation type for the physical uplink shared channel being uplink resource allocation type 2, the transmission bandwidth of the aperiodic sounding reference signal is determined as one or more resource block sets indicated by the downlink control information among one or more resource block sets allocated for transmission of the physical uplink shared channel.
10 . The method of claim 1 , wherein based on the frequency resource allocation type for the physical uplink shared channel being uplink resource allocation type 2, the transmission bandwidth of the aperiodic sounding reference signal is determined by one or more resource block sets for transmission of the physical uplink shared channel.
11 . The method of claim 10 , wherein when the physical uplink shared channel and the aperiodic sounding reference signal are transmitted in the same slot or an adjacent slot, and/or a bandwidth configured for the aperiodic sounding reference signal is greater than one or more resource block sets for transmission of the physical uplink shared channel, the transmission bandwidth of the aperiodic sounding reference signal is determined by one or more resource block sets for transmission of the physical uplink shared channel.
12 . The method of claim 11 , wherein a listen before talk (LBT) operation is performed in a bandwidth corresponding to one or more resource block sets for transmission of the physical uplink shared channel, and when the LBT operation fails, the LBT operation is re-performed in a bandwidth configured for the aperiodic sounding reference signal.
13 . The method of claim 1 , wherein the downlink control information includes time resource allocation information for transmission of the physical uplink shared channel, and wherein the aperiodic sounding reference signal is transmitted in a slot allocated by the time resource allocation information.
14 . The method of claim 1 , wherein whether the transmission bandwidth of the aperiodic sounding reference signal is determined based on the frequency resource allocated by the frequency resource allocation information and the frequency resource allocation type is configured by the downlink control information or higher layer signaling.
15 . A terminal comprising: at least one transceiver for transmitting and receiving a wireless signal; and at least one processor for controlling the at least one transceiver, wherein the at least one processor configured to: receive, from a base station, downlink control information for scheduling a physical uplink shared channel and triggering transmission of an aperiodic sounding reference signal; and transmit, to the base station, the physical uplink shared channel and the aperiodic sounding reference signal based on the downlink control information, wherein the downlink control information includes frequency resource allocation information for transmission of the physical uplink shared channel, and wherein a transmission bandwidth of the aperiodic sounding reference signal is determined based on a frequency resource allocated by the frequency resource allocation information for transmission of the physical uplink shared channel and a frequency resource allocation type for the physical uplink shared channel.
16 . At least one non-transitory computer-readable medium storing at least one instruction, wherein the at least one instruction is executable by at least one processor controls a device to: receive, from a base station, downlink control information for scheduling a physical uplink shared channel and triggering transmission of an aperiodic sounding reference signal; and transmit, to the base station, the physical uplink shared channel and the aperiodic sounding reference signal based on the downlink control information, wherein the downlink control information includes frequency resource allocation information for transmission of the physical uplink shared channel, and wherein a transmission bandwidth of the aperiodic sounding reference signal is determined based on a frequency resource allocated by the frequency resource allocation information and a frequency resource allocation type for the physical uplink shared channel.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a National Stage application under 35 U.S.C. § 371 of International Application No. PCT/KR2021/007029, filed on Jun. 4, 2021, which claims the benefit of Korean Application No. 10-2020-0069562, filed on Jun. 9, 2020. The disclosures of the prior applications are incorporated by reference in their entirety. TECHNICAL FIELD The present disclosure relates to a wireless communication system, and in more detail, relates to a method and an apparatus of transmitting and receiving a sounding reference signal in a wireless communication system. BACKGROUND A mobile communication system has been developed to provide a voice service while guaranteeing mobility of users. However, a mobile communication system has extended even to a data service as well as a voice service, and currently, an explosive traffic increase has caused shortage of resources and users have demanded a faster service, so a more advanced mobile communication system has been required. The requirements of a next-generation mobile communication system at large should be able to support accommodation of explosive data traffic, a remarkable increase in a transmission rate per user, accommodation of the significantly increased number of connected devices, very low End-to-End latency and high energy efficiency. To this end, a variety of technologies such as Dual Connectivity, Massive Multiple Input Multiple Output (Massive MIMO), In-band Full Duplex, Non-Orthogonal Multiple Access (NOMA), Super wideband Support, Device Networking, etc. have been researched. SUMMARY A technical object of the present disclosure is to provide a method and an apparatus of transmitting and receiving a sounding reference signal. In addition, an additional technical object of the present disclosure is to provide a method and an apparatus of configuring/indicating a transmission bandwidth of a sounding reference signal. In addition, an additional technical object of the present disclosure is to provide a method and an apparatus for time domain bundling between a sounding reference signal and an uplink demodulation reference signal. The technical objects to be achieved by the present disclosure are not limited to the above-described technical objects, and other technical objects which are not described herein will be clearly understood by those skilled in the pertinent art from the following description. A method of transmitting a sounding reference signal (SRS) in a wireless communication system may include: receiving, from a base station, downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) and triggering transmission of the SRS and transmitting, to the base station, the PUSCH and the SRS based on the DCI. A transmission bandwidth of the SRS may determined based on frequency resource allocation information for transmission of the PUSCH. A method of receiving a sounding reference signal (SRS) in a wireless communication system may include: transmitting, to a terminal, downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) and triggering transmission of the SRS and receiving, from the terminal, the PUSCH and the SRS. A transmission bandwidth of the SRS may be determined based on frequency resource allocation information for transmission of the PUSCH. According to an embodiment of the present disclosure, dynamic/flexible/low-latency downlink and/or uplink channel estimation can be accurately performed by dynamically configuring/indicating frequency domain resource allocation for a sounding reference signal. According to an embodiment of the present disclosure, a frequency domain resource having good channel quality may be reused by performing sounding on a frequency resource/bandwidth for uplink transmission. In addition, according to an embodiment of the present disclosure, an additional channel may be searched for by performing sounding on a frequency resource/bandwidth other than a frequency resource/bandwidth for uplink transmission. In addition, according to an embodiment of the present disclosure, it is possible to prevent collision with an uplink channel of another terminal in an unlicensed band. In addition, according to an embodiment of the present disclosure, since an uplink demodulation reference signal and time domain bundling are applied, increasing accuracy of uplink channel estimation. In addition, according to an embodiment of the present disclosure, since an uplink demodulation reference signal and time domain bundling are applied, performance of uplink channel estimation can be maintained even if fewer resources are allocated for a sounding reference signal, uplink resources can be used efficiently. Effects achievable by the present disclosure are not limited to the above-described effects, and other effects which are not described herein may be clearly understood by those skilled in the pertinent art from the following description.