Method and apparatus for transmitting sounding reference signal in wireless communication system
The present disclosure relates to a pre-5 th -Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4 th -Generation (4G) communication system such as Long Term Evolution (LTE). An operating method of a terminal in a wireless communication system includes: receiving SRS configuration information from a base station; and transmitting an SRS according to the SRS configuration information. The SRS configuration information includes a slot configuration comprising a slot periodicity for transmitting a SRS, and a slot offset for the slot periodicity.
1. A user equipment (UE) in a wireless communication system, the UE comprising:
at least one transceiver; and
at least one processor operably coupled to the at least one transceiver, and configured to:
control the at least one transceiver to receive, from a base station, a sounding reference signal (SRS) configuration including:
information for indicating a number of at least one symbol of an SRS transmission within a slot, wherein the number of the at least one symbol is 1, 2, or 4,
information for indicating a repetition number, wherein the repetition number is smaller than or equal to the number of the at least one symbol, and
information on a slot periodicity and a slot offset for the slot periodicity, and
control the at least one transceiver to transmit, to the base station, at least one SRS based on the SRS configuration and a numerology configuration indicating a subcarrier spacing.
2. The UE of claim 1 , wherein the SRS configuration is transmitted via a radio resource control (RRC) signaling.
3. The UE of claim 1 , wherein the SRS configuration includes information for indicating a start symbol position for the SRS transmission, and
wherein the start symbol position indicates one of last six symbols of the slot.
4. The UE of claim 1 , wherein the at least one processor is, in order to transmit the at least one SRS, configured to:
control the at least one transceiver to receive, from the base station, an activation command using a medium access control (MAC) control element (CE) for a semi-persistent SRS transmission; and
identify at least one slot based on the SRS configuration and the numerology configuration after receiving the activation command.
5. The UE of claim 4 , wherein, the at least one processor is further configured to:
control the at least one transceiver to receive, from the base station, a deactivation command using a MAC CE; and
control the at least one transceiver to cease an SRS transmission according to the slot periodicity after receiving the deactivation command.
6. The UE of claim 1 , wherein, the at least one processor is further configured to:
control the at least one transceiver to receive, from the base station, downlink control information (DCI) for an aperiodic SRS transmission; and
after at least one slot from a slot in which the DCI is received, control the at least one transceiver to transmit an SRS to the base station.
7. A base station in a wireless communication system, the base station comprising:
at least one transceiver; and
at least one processor operably coupled to the at least one transceiver, and configured to:
control the at least one transceiver to transmit, to a user equipment (UE), a sounding reference signal (SRS) configuration including:
information for indicating a number of at least one symbol of an SRS transmission within a slot, wherein the number of the at least one symbol is 1, 2, or 4,
information for indicating a repetition number, wherein the repetition number is smaller than or equal to the number of the at least one symbol, and
information on a slot periodicity and a slot offset for the slot periodicity, and
control the at least one transceiver to receive, from the UE, at least one SRS based on the SRS configuration and a numerology configuration indicating a subcarrier spacing.
8. The base station of claim 7 , wherein the SRS configuration is transmitted via a radio resource control (RRC) signaling.
9. The base station of claim 7 , wherein the SRS configuration includes information for indicating a start symbol position for the SRS transmission, and
wherein the start symbol position indicates one of last six symbols of the slot.
10. The base station of claim 7 , wherein the at least one processor is, in order to receive the at least one SRS, configured to:
control the at least one transceiver to transmit, to the UE, an activation command using a medium access control (MAC) control element (CE) for a semi-persistent SRS transmission; and
identify at least one slot based on the SRS configuration and the numerology configuration after a transmission of the activation command.
11. The base station of claim 10 ,
wherein the at least one processor is further configured to transmit, to the UE, a deactivation command using a MAC CE, and
wherein the deactivation command is used to cease an SRS transmission according to the slot periodicity from the UE.
12. The base station of claim 7 , wherein the at least one processor is further configured to:
control the at least one transceiver to transmit, to the UE, downlink control information (DCI) for an aperiodic SRS transmission; and
after at least one slot from a slot in which the DCI is transmitted, control the at least one transceiver to receive an SRS to the base station.
13. A method for operating a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station, a configuration message regarding a sounding reference signal (SRS) configuration including:
information for indicating a number of at least one symbol of an SRS transmission within a slot, wherein the number of the at least one symbol is 1, 2, or 4,
information for indicating a repetition number, wherein the repetition number is smaller than or equal to the number of the at least one symbol, and
information on a slot periodicity and a slot offset for the slot periodicity; and
transmitting, to the base station, at least one SRS based on the SRS configuration and a numerology configuration indicating a subcarrier spacing.
14. The method of claim 13 , wherein the SRS configuration is transmitted via a radio resource control (RRC) signaling.
15. The method of claim 13 , wherein the SRS configuration includes:
information for indicating a start symbol position for the SRS transmission,
wherein the start symbol position indicates one of last six symbols of the slot.
16. The method of claim 13 , wherein transmitting the at least one SRS comprises:
receiving, from the base station, an activation command using a medium access control (MAC) control element (CE) for a semi-persistent SRS transmission; and
identifying at least one slot based on the SRS configuration and the numerology configuration after receiving the activation command.
17. The method of claim 16 , further comprising:
receiving, from the base station, a deactivation command using a MAC CE; and
ceasing an SRS transmission according to the slot periodicity after receiving the deactivation command.
18. The method of claim 13 , further comprising:
receiving, from the base station, downlink control information (DCI) for an aperiodic SRS transmission; and
after at least one slot from a slot in which the DCI is received, transmitting an SRS to the base station.
19. The UE of claim 1 , wherein the at least one SRS is identified based on a following equation:
( n f N slot frame,μ +n s,f μ −T offset )mod T SRS =0,
where n f denotes a frame index, N slot frame,μ denotes a total number of slots in one frame according to the subcarrier spacing u, n s,f μ denotes a slot index according to the subcarrier spacing u, T SRS denotes the slot periodicity, and T offset denotes the slot offset.
20. The base station of claim 7 , wherein the at least one SRS is identified based on a following equation:
( n f N slot frame,μ +n s,f μ −T offset )mod T SRS =0,
where n f denotes a frame index, N slot frame,μ denotes a total number of slots in one frame according to the subcarrier spacing u, n s,f μ denotes a slot index according to the subcarrier spacing u, T SRS denotes the slot periodicity, and T offset denotes the slot offset.
21. The method of claim 13 , wherein the at least one SRS is identified based on a following equation:
( n f N slot frame,μ +n s,f μ −T offset )mod T SRS =0,
where n f denotes a frame index, N slot frame,μ denotes a total number of slots in one frame according to the subcarrier spacing u, n s,f μ denotes a slot index according to the subcarrier spacing u, T SRS denotes the slot periodicity, and T offset denotes the slot offset.