Method for transmitting/receiving signals by using beams in wireless communication system, and device for same

Abstract

The present specification provides a method for transmitting/receiving signals through beams in a wireless communication system. The signal transmission/reception method performed by a terminal, in the present specification, may comprise the steps of: receiving a beam reference signal used in beam management from an eNB via a first Rx beam; if beam reporting is triggered, reporting to the eNB a measurement result based on the beam reference signal; receiving, from the eNB, control information related to the determination of a second Rx beam for receiving a particular signal; and receiving the particular signal via the second Rx beam on the basis of the received control information.

1 . A method of performing beam recovery in a wireless communication system, the method performed by a user equipment (UE) comprising:
 receiving, from a base station, a beam reference signal (BRS) used for beam management;   transmitting, to the base station, a control signal for a beam failure recovery request when a beam failure event is detected; and   reporting, to the base station, a beam measurement result in a specific resource when beam reporting is triggered,   wherein the control signal comprises indication information indicating whether an alternative beam is present, and   wherein the alternative beam is a reference signal having higher channel quality than specific channel quality among reference signals configured for the beam management.   
     
     
         2 . The method of  claim 1 ,
 wherein the specific signal is a physical downlink control channel (PDCCH).   
     
     
         3 . The method of  claim 2 ,
 wherein the control information indicates a resource quasi co-located (QCL) with a resource of a demodulation reference signal (DMRS) for the PDCCH reception.   
     
     
         4 . The method of  claim 3 ,
 wherein the resource quasi co-located (QCL) with the resource of the demodulation reference signal (DMRS) for the PDCCH reception is a resource of the beam reference signal.   
     
     
         5 . The method of  claim 2 ,
 wherein receiving, from the base station, the control information comprises:   receiving, from the base station, information for a given number of beam sets for receiving the PDCCH through first signaling; and   receiving, from the base station, information indicating a specific beam set configured for each specific time unit through second signaling.   
     
     
         6 . The method of  claim 5 ,
 wherein priority is set for each of the given number of beam sets.   
     
     
         7 . The method of  claim 2 ,
 wherein the specific time domain comprises at least one time gap determined by taking into consideration at least one of a decoding time of the control information or beam switching latency between reception beams for the reception of a plurality of the PDCCHs.   
     
     
         8 . The method of  claim 7 , further comprising:
 transmitting, to the base station, UE capability information indicating a capability of the UE related to the beam switching latency.   
     
     
         9 . The method of  claim 8 , further comprising:
 receiving, from the base station, information related to the at least one time gap,   wherein the information related to the at least one time gap comprises at least one of a number of time gaps included in the specific time domain or duration of the time gap.   
     
     
         10 . The method of  claim 1 , further comprising:
 receiving, from the base station, a confirm message for providing notification of updated information related to a beam if the information related to the beam is updated based on the beam reporting.   
     
     
         11 . The method of  claim 1 ,
 wherein the control information is represented as a bitmap.   
     
     
         12 . The method of  claim 2 , further comprising:
 receiving, from the base station, indication information indicating a third reception beam for receiving a physical downlink shared channel (PDSCH); and   receiving, from the base station, a physical downlink shared channel (PDSCH) based on the received indication information.   
     
     
         13 . The method of  claim 12 ,
 wherein the indication information indicates a preconfigured reception beam or indicates a reception beam identical with a second reception beam.   
     
     
         14 . The method of  claim 13 ,
 wherein the PDSCH is received after a specific offset from timing in which the indication information is received, and   wherein the specific offset is determined by taking into consideration at least one of a decoding time for the indication information or beam switching latency.   
     
     
         15 . The method of  claim 1 ,
 wherein the specific resource is a PDCCH.   
     
     
         16 . A user equipment transmitting and receiving a signal through at least one reception beam in a wireless communication system signal, the user equipment comprising:
 a radio frequency (RF) module configured to transmit and receive radio signals; and   a processor functionally connected to the RF module,   wherein the processor is configured to:   receive, from a base station, a beam reference signal used for beam management through a first reception beam;   report, to the base station, a measurement result based on the beam reference signal when beam reporting is triggered;   receive, from the base station, control information related to a determination of a second reception beam for receiving a specific signal; and   receive the specific signal through the second reception beam based on the received control information,   
       wherein when a plurality of specific signals is received through different symbols included in a specific time domain, the control information is configured for each specific resource.