Method and device for generating aperiodic positioning reference signal in wireless communication system
Provided is a method of estimating, by a user equipment (UE), a location in a wireless communication system. Here, the method of estimating, by the UE, the location may include receiving, from a base station, downlink control information (DCI) that includes aperiodic downlink (DL) positioning reference signal (PRS) related information; receiving a DL PRS from the base station through the aperiodic DL PRS related information included in the DCI that is received from the base station; and estimating the location based on the received DL PRS.
1 . A method performed by a wireless user device, the method comprising:
receiving, from a base station, a downlink (DL) positioning reference signal (PRS) configuration indicating DL PRS muting and a DL PRS resource set, wherein the DL PRS resource set comprises a plurality of DL PRS resources, and wherein the DL PRS configuration further indicates at least one of:
a DL PRS transmission periodicity for the DL PRS resource set; or
a DL PRS resource time gap;
transmitting, to the base station, on-demand DL PRS request information, wherein the on-demand DL PRS request information comprises information of a synchronization signal block (SSB) index corresponding to a beam, and wherein the SSB index corresponds to one of 0, 1, 2, . . . , or 63;
receiving, based on the on-demand DL PRS request information, a response;
receiving, from the base station, a DL PRS associated with the SSB index; and
receiving, from the base station, at least one SSB,
wherein the beam corresponding to the SSB index is based on a measurement of the at least SSB,
wherein the beam corresponds to a suitable beam for the wireless user device, and
wherein, for quasi-colocation (QCL) type-D, the information of the SSB index corresponding to the beam indicates at least one of:
direction information of a suitable beam for receiving DL PRS of a serving cell; or
direction information of a suitable beam for receiving DL PRS of a non-serving cell.
2 . The method of claim 1 , further comprising at least one of:
determining, based on the received DL PRS, a reference signal time difference (RSTD) measurement; or
estimating, based on the received DL PRS, a location.
3 . The method of claim 1 , wherein the receiving the response comprises receiving, from a location management function (LMF) and via the base station, the response, and wherein the response comprises quasi-colocation (QCL) information.
4 . The method of claim 1 , further comprising:
transmitting, to the base station, measurement information of an SSB corresponding to the SSB index to cause the base station to transmit the measurement information to a location management function (LMF).
5 . The method of claim 1 , wherein the on-demand DL PRS request information indicates at least one of:
a parameter related to DL PRS resource repetition factor;
a parameter related to a DL PRS resource bandwidth; or
a parameter related to DL PRS number of symbols.
6 . The method of claim 1 , wherein the on-demand DL PRS request information excludes:
a parameter related to a DL PRS muting; and
a parameter related to a system frame number (SFN) offset.
7 . A method performed by a wireless user device, the method comprising:
receiving, from a base station, a downlink (DL) positioning reference signal (PRS) configuration indicating DL PRS muting and a DL PRS resource set, wherein the DL PRS resource set comprises a plurality of DL PRS resources;
transmitting, to the base station, on-demand DL PRS request information, wherein the on-demand DL PRS request information comprises information of a synchronization signal block (SSB) index corresponding to a beam, wherein the SSB index corresponds to one of 0, 1, 2, . . . , or 63, and wherein the on-demand DL PRS request information indicates at least one of:
a parameter related to DL PRS resource repetition factor;
a parameter related to a DL PRS resource bandwidth; or
a parameter related to DL PRS number of symbols;
receiving, based on the on-demand DL PRS request information, a response;
receiving, from the base station, a DL PRS associated with the SSB index; and
receiving, from the base station, at least one SSB,
wherein the beam corresponding to the SSB index is based on a measurement of the at least SSB,
wherein the beam corresponds to a suitable beam for the wireless user device, and
wherein, for quasi-colocation (QCL) type-D, the information of the SSB index corresponding to the beam indicates at least one of:
direction information of a suitable beam for receiving DL PRS of a serving cell; or
direction information of a suitable beam for receiving DL PRS of a non-serving cell.
8 . The method of claim 7 , further comprising at least one of:
determining, based on the received DL PRS, a reference signal time difference (RSTD) measurement; or
estimating, based on the received DL PRS, a location.
9 . The method of claim 7 , wherein the receiving the response comprises receiving, from a location management function (LMF) and via the base station, the response, and wherein the response comprises quasi-colocation (QCL) information.
10 . The method of claim 7 , further comprising:
transmitting, to the base station, measurement information of an SSB corresponding to the SSB index to cause the base station to transmit the measurement information to a location management function (LMF).
11 . The method of claim 7 , wherein the on-demand DL PRS request information excludes:
a parameter related to a DL PRS muting; and
a parameter related to a system frame number (SFN) offset.