# US 2017/0289831 A1 · Method for performing positioning in wireless communication system and device therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0289831 A1 - Document ID: US20170289831A1 - Status: Published application - Kind: A1 - Application number: 15/507,685 - Filed: 2015-08-25 - Published: 2017-10-05 - Earliest claimed: 2014-08-28 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jonghyun PARK; Kijun KIM; Yunjung YI; Bonghoe KIM; Hanjun PARK - Web page: https://patentgrep.com/patent/US20170289831A1 ## CPC - H04W 24/08: Testing, {supervising or monitoring} using real traffic - G01S 5/02: using radio waves (using satellite radio beacon systems for determining position G01S19/00) - G01S 5/0236: {Assistance data, e.g. base station almanac} - G01S 5/10: Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements {, e.g. omega or decca systems}(G01S5/12 takes precedence {; beacons and receivers cooperating therewith G01S1/306, G01S1/308}) - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - H04W 72/0466: {the resource being a scrambling code} - H04B 17/27: for locating or positioning the transmitter - H04W 88/02: Terminal devices - H04W 88/08: Access point devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION ## Abstract Disclosed is a method for performing positioning by a user equipment (UE) in a wireless communication system, including: receiving assistance data including reference cell information and neighbor cell information from a serving base station (BS), the reference cell information and the neighbor cell information including channel state information-reference signal (CSI-RS) configuration information for measurement related to CSI-RS-based positioning; receiving a CSI-RS from each of a reference cell and at least one neighbor cell on the basis of the received assistance data; measuring a reference signal time difference (RSTD) regarding the reference cell of the at least one neighbor cell using the received CSI-RS; and reporting the measured RSTD to the serving BS. ## Claims ### Claim 1 A method for performing positioning by a user equipment (UE) in a wireless communication system, the method comprising: receiving assistance data including reference cell information and neighbor cell information from a serving base station (BS), the reference cell information and the neighbor cell information including channel state information-reference signal (CSI-RS) configuration information for measurement related to CSI-RS-based positioning; receiving a CSI-RS from each of a reference cell and at least one neighbor cell on the basis of the received assistance data; measuring a reference signal time difference (RSTD) regarding the reference cell of the at least one neighbor cell using the received CSI-RS; and reporting the measured RSTD to the serving BS. ### Claim 2 (depends on 1) The method of claim 1, wherein a sequence of the CSI-RS is scrambled by an independent virtual cell ID (VCI). ### Claim 3 (depends on 1) The method of claim 1, further comprising: receiving indication information indicating whether the CSI-RS is used for CSI feedback or used for positioning-related measurement from the serving BS. ### Claim 4 (depends on 1) The method of claim 1, wherein the CSI-RS configuration information includes at least one of a CSI-RS bandwidth field, an antenna port count field, a resource configuration field, a subframe configuration field, a scrambling identity field, and a quasico-located (QCL) CRS info field. ### Claim 5 (depends on 4) The method of claim 4, wherein when the QCL CRS Info field is included in the CSI-RS configuration information, the RSTD us measured in consideration of a common reference signal (CRS) and a QCL assumption. ### Claim 6 (depends on 1) The method of claim 1, wherein the CSI-RS configuration information is received by each transmission point (TPs), and each TP is included in a specific cell. ### Claim 7 (depends on 1) The method of claim 1, wherein the CSI-RS configuration information is included in a CSI-RS Info information element (IE). ### Claim 8 (depends on 1) The method of claim 1, wherein the assistance data further includes positioning reference signal (PRS) configuration information for measurement related to PRS-based positioning, and the method further comprising: receiving a PRS from each of the reference cell and the at least one neighbor cell on the basis of the received PRS configuration information. ### Claim 9 (depends on 8) The method of claim 8, wherein when the PRS and the CSI-RS collide with each other, transmission of the CSI-RS is dropped. ### Claim 10 (depends on 9) The method of claim 9, wherein the CSI-RS of the dropped transmission is a CSI-RS for measurement related to positioning. ### Claim 11 (depends on 9) The method of claim 9, wherein transmission of the CSI-RS is dropped only in a subframe in which a collision has occurred. ### Claim 12 (depends on 8) The method of claim 8, wherein when the PRS and the CSI-RS collide with each other, transmission of the PRS is dropped in a subframe in which the collision has occurred. ### Claim 13 A user equipment (UE) for performing positioning in a wireless communication system, the UE comprising: a radio frequency (RF) unit transmitting and receiving a wireless signal; and a processor functionally connected to the RF unit and controlling the UE, wherein the processor performs control to receive assistance data including reference cell information and neighbor cell information from a serving base station (BS), the reference cell information and the neighbor cell information including channel state information-reference signal (CSI-RS) configuration information for measurement related to CSI-RS-based positioning, receive a CSI-RS from each of a reference cell and at least one neighbor cell on the basis of the received assistance data, measure a reference signal time difference (RSTD) regarding the reference cell of the at least one neighbor cell using the received CSI-RS, and report the measured RSTD to the serving BS.