Method and device for transmitting or receiving sounding reference signal in wireless communication system
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.
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.