Patent ID: 11903026
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. A method of a user equipment (UE) in a wireless communication system, the method comprising:
receiving sounding reference signal (SRS) configuration information and positioning reference signal (PRS) configuration information;
performing listen before talk (LBT) with respect to an unlicensed-band;
transmitting a (SRS) to an anchor node (AN) based on the SRS configuration information on a channel in an idle state according to the LBT among a plurality of channels included in the unlicensed-band;
receiving information related to a Tx−Rx time difference (TRTD) from the AN;
receiving a PRS from the AN based on the PRS configuration information on the channel; and
obtaining round trip time (RTT) based on the SRS, the PRS and the TRTD,
wherein the SRS is transmitted immediately after the LBT is performed, and
wherein the TRTD is a time difference value between a time at which the AN receives the SRS and a time at which the AN transmits the PRS.