Aperiodic transmission method and apparatus for sounding reference signal in wireless communication system

摘要

Provided are a method and an apparatus for an aperiodic transmission of a sounding reference signal (SRS), which is performed by a user equipment (UE), in a wireless communication system. The UE aperiodically transmits an SRS through a certain uplink (UL) component carrier (CC) of a plurality of UL CCs. The determination of the certain UL CC is based on a downlink (DL) grant, wherein the downlink grant contains a message that triggers the aperiodic transmission of the SRS.

主权项

1. A method for transmitting an aperiodic sounding reference signal (SRS) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, via a physical downlink control channel (PDCCH), downlink control information (DCI) for a downlink scheduling, the DCI including at least a trigger for triggering the aperiodic SRS transmission; if a carrier indicator field (CIF) is included in the DCI, aperiodically transmitting an SRS through a specific uplink (UL) component carrier (CC) among a plurality of aggregated UL CCs; and if a CIF is not included in the DCI, aperiodically transmitting an SRS through a UL CC which is among the plurality of aggregated UL CCs and linked to a downlink (DL) CC in which a physical downlink shared channel (PDSCH) is scheduled by the DCI.