# US 11,451,929 B2 · Link signal setting method for positioning mobile communication terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,451,929 B2 - Document ID: US11451929B2 - Status: Granted - Kind: B2 - Application number: 17/050,472 - Filed: 2019-04-26 - Published: 2021-08-05 - Granted: 2022-09-20 - Earliest claimed: 2018-04-27 - Assignees: Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University); Infoseize Systems Co. Ltd. - Applicants: Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University); Infoseize Systems Co. Ltd. - Inventors: Hi Chan Moon - Web page: https://patentgrep.com/patent/US11451929B2 ## CPC - H04W 4/029: Location-based management or tracking services - G01S 5/0045: {Transmission from base station to mobile station (G01S5/009 takes precedence)} - G01S 5/0072: {Transmission between mobile stations, e.g. anti-collision systems} - G01S 5/0289: {of multiple transceivers, e.g. in ad hoc networks} - G01S 13/765: {with exchange of information between interrogator and responder} - H04W 4/023: {using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds} - H04W 76/27: Transitions between radio resource control [RRC] states - G01S 5/02216: {Timing or synchronisation of the receivers} - G01S 5/14: Determining absolute distances from a plurality of spaced points of known location - H04W 4/12: Messaging; Mailboxes; Announcements - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - 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 ## Abstract Proposed are an apparatus and a method for estimating the position of a target terminal within a mobile communication system. In general, a mobile communication system is composed of a base station and terminals. In the present invention, one or more positioning devices are placed around a target terminal required to be positioned to measure a transmission signal of the target terminal, and accurately measures the position of the target terminal on the basis of the transmission signal. In the above process, the base station should connect a communication channel with the terminal for positioning of the terminal, and a method therefor is proposed. In particular, the present invention relates to a method for setting a terminal in a standby state to transmit an uplink signal. In addition, an operation and a protocol for positioning the target terminal are proposed. ## Claims ### Claim 1 A base station comprising: a communication unit configured to receive an uplink signal configuration request for a terminal in a standby state from a positioning device or a server communicating with the positioning device; a controller configured to generate a state transition signal for instructing a state transition of the terminal in the standby state, and generate a downlink signal for causing the terminal to transmit an uplink signal; and a transmitter configured to transmit the state transition signal and the downlink signal to the terminal. ### Claim 2 (depends on 1) The base station according to claim 1, wherein the communication unit transmits channel configuration information of the uplink signal or identification information of the terminal to a position measurement server or the positioning device. ### Claim 3 (depends on 1) The base station according to claim 1, wherein after the controller receives a measurement request for the terminal in the standby state, the controller generates the state transition signal for instructing the state transition of the terminal in the standby state, and generates the downlink signal for causing the terminal to transmit the uplink signal, and the transmitter transmits the state transition signal and the downlink signal to the terminal. ### Claim 4 (depends on 1) The base station according to claim 1, wherein the downlink signal is a signal with a predefined CRC error, a signal containing a predefined noise or interference signal, a signal coded with a level higher than an MCS level configured in the terminal, or a signal for requesting the terminal to transmit state information or channel environment information. ### Claim 5 (depends on 1) The base station according to claim 1, wherein the receiver receives a link state information request signal requesting link configuration state information between the base station and the terminal from a position measurement server or the positioning device, and wherein in response to the link state information request signal, the controller causes the link configuration state information between the base station and the terminal to be transmitted to the position measurement server or the positioning device. ### Claim 6 (depends on 1) The base station according to claim 1, wherein the state transition signal configures the terminal in standby mode to transmit the uplink signal without change at a user interface of the terminal. ### Claim 7 A positioning device comprising: a downlink signal receiver configured to receive a downlink signal from a base station; an uplink signal receiver configured to receive an uplink signal from a terminal; a communication unit configured to transmit a measurement signal obtained by measuring the uplink signal to a position measurement server; and a controller configured to: determine whether the uplink signal receiver performs an operation of detecting the uplink signal from the terminal and whether the communication unit performs an operation of transmitting the measurement signal to the base station or the position measurement server, determine a state of the positioning device according to whether the terminal transmits the uplink signal used for positioning or whether the positioning device successfully detects the uplink signal transmitted from the terminal, and display state information of the positioning device at a display connected to the positioning device or transmit the state information of the positioning device to a server communicating with the positioning device. ### Claim 8 (depends on 7) The positioning device according to claim 7, wherein the controller determines a state of the positioning device according to whether the uplink signal receiver performs the operation of detecting the uplink signal from the terminal and whether the communication unit performs the operation of transmitting the measurement signal to the base station or the position measurement server, and wherein the communication unit transmits the state of the positioning device to the base station or the position measurement server. ### Claim 9 (depends on 7) The positioning device according to claim 7, wherein the server is a position measurement server. ### Claim 10 A position measurement server comprising: a communication unit configured to receive a measurement signal for a terminal and state information of at least one positioning device from the positioning device; and a controller configured to calculate a position of the terminal based on the measurement signal for the terminal and the state information. ### Claim 11 (depends on 10) The position measurement server according to claim 10, wherein the controller calculates a position of the terminal using an algorithm according to the state information of the positioning device and the measurement signal for the terminal. ### Claim 12 (depends on 10) The position measurement server according to claim 10, wherein the controller display the state information of the positioning device at a display connected to the position measurement server. ### Claim 13 A method for configuring an uplink signal of a terminal by a base station, comprising: receive an uplink signal configuration request for a terminal in a standby state from a positioning device or a server communicating with the positioning device; generating a state transition signal for instructing a state transition of the terminal in the inactive state and generating a downlink signal for causing the terminal to transmit an uplink signal; and transmitting the state transition signal and the downlink signal to the terminal.