A method of a user equipment (UE) in a wireless communication system. The method comprises receiving, from a base station (BS), a dynamic downlink control signal including sounding reference signal (SRS) resource and configuration information based on user pool scheduling information, wherein the UE is included in a user pool group determined by the user pool scheduling information. The method further comprises determining the SRS resource and configuration information included in the user pool scheduling information received by the dynamic downlink control signal and transmitting, to the BS, SRS based on the SRS resource and configuration information included in the user pool scheduling information.