Method and device for reference signal linkage-based downlink transmission/reception in wireless communication system
Disclosed are a method and a device for performing a downlink transmission or reception on the basis of reference signal linkage in a wireless communication system. According to an embodiment of the present disclosure, a method for performing a downlink reception by a terminal in a wireless communication system may comprise: a reference signal (RS) linkage information reception step of receiving information on RS linkage from a base station, wherein the RS linkage includes information on a mapping relationship between a reference RS resource and one or more target RS resources; a step of receiving, from the base station, information on a first spatial parameter for the reference RS resource related to specific RS linkage; and a step of performing the downlink reception on the basis of a second spatial parameter corresponding to the first spatial parameter with respect to a specific target transmission or reception among one or more target transmissions or receptions mapped to a reference transmission or reception related to the specific RS linkage.
1 . A method comprising:
receiving configuration information for a mapping between a first resource for uplink transmission and at least one second resource for downlink reception;
receiving information for a spatial parameter for the first resource,
wherein the information includes reference signal information for a spatial relation for the first resource; and
determining a spatial parameter for the at least one second resource based on the mapping and the reference signal information.
2 . The method of claim 1 ,
wherein the configuration information includes at least one mapping candidate, and
wherein each of the at least one mapping candidate is based on a unique combination of a resource for uplink transmission and at least one resource for downlink reception.
3 . The method of claim 1 , wherein the receiving the configuration information comprises:
receiving information for at least one mapping candidate; and
receiving information for activation of the mapping among the at least one mapping candidate.
4 . The method of claim 1 ,
wherein the information is received through a medium access control (MAC) control element (CE) and
wherein the mapping is activated after a predetermined time from a transmission timing of acknowledgement/non-acknowledgement (ACK/NACK) for the MAC CE.
5 . The method of claim 1 ,
wherein, based on that the first resource is a predetermined uplink reference signal, the spatial parameter for the first resource is indicated by spatial relation information, and
wherein the spatial parameter for the at least one second resource is determined based on the spatial relation information.
6 . The method of claim 1 ,
wherein a transmission configuration indicator (TCI) state information is preconfigured for the at least one second resource, and
wherein the TCI state information includes another reference signal information for a spatial relation for the at least one second resource.
7 . The method of claim 6 ,
wherein the spatial parameter for the at least one second resource is determined based on the mapping and the reference signal information, instead of the another reference signal information.
8 . The method of claim 6 ,
wherein the determining the spatial parameter for the at least one second resource comprises updating the TCI state information by replacing the another reference signal information with the reference signal information.
9 . The method of claim 1 , further comprising:
receiving information for whether the spatial parameter for the at least one second resource is determined based on the mapping or not.
10 . The method of claim 1 ,
wherein correspondence between the spatial parameter for the first resource and the spatial parameter for the at least one second resource is predetermined.
11 . The method of claim 1 ,
wherein the first resource includes a sounding reference signal (SRS) resource, and
wherein the at least one second resource includes at least one of a channel state information-reference signal (CSI-RS) or a synchronization signal block (SSB) resource.
12 . An apparatus comprising:
at least one transceiver; and
at least one processor coupled with the at least one transceiver,
wherein the at least one processor is configured to:
receive configuration information for a mapping between a first resource for uplink transmission and at least one second resource for downlink reception;
receive information for a spatial parameter for the first resource,
wherein the information includes reference signal information for a spatial relation for the first resource; and
determine a spatial parameter for the at least one second resource based on the mapping and the reference signal information.
13 . A method comprising:
transmitting configuration information for a mapping between a first resource for uplink transmission and at least one second resource for downlink reception; and
transmitting information for a spatial parameter for the first resource,
wherein the information includes reference signal information for a spatial relation for the first resource, and
wherein a spatial parameter for the at least one second resource is based on the mapping and the reference signal information.
14 . A non-transitory computer-readable medium storing at least one computer program comprising instructions that, when executed by at least one processor, cause the at least one processor to:
receive configuration information for a mapping between a first resource for uplink transmission and at least one second resource for downlink reception;
receive information for a spatial parameter for the first resource,
wherein the information includes reference signal information for a spatial relation for the first resource; and
determine a spatial parameter for the at least one second resource based on the mapping and the reference signal information.