KR20210006311A - Apparatus for positioning of user equipments and method for controlling same - Google Patents

Abstract

The present invention relates to a device for terminal position measurement and a method for controlling the same. Provided is a position measurement server including: a communication unit receiving a measurement result from a position measuring instrument with regard to an uplink signal transmitted from a target terminal to a base station; and a control unit calculating the position of the target terminal based on the measurement result regarding the uplink signal. The control unit determines whether to change setting information on the uplink signal transmitted from the target terminal based on information on the distance between the target terminal and the position measuring instrument. The communication unit transmits a change request regarding the setting information to the base station.

Description

Device for measuring the location of a terminal and its control method {APPARATUS FOR POSITIONING OF USER EQUIPMENTS AND METHOD FOR CONTROLLING SAME}

The present invention relates to an apparatus and method for estimating the position of a target terminal in a mobile communication system.

Recently, for public services, there have been attempts by a third party, not a communication service provider, to acquire the location or movement information of a terminal existing in a specific area. As an example, public organizations of the Korea Road Corporation and the National Police Agency attempted to obtain information such as the number or speed of terminals passing through a specific area.

In this situation, it is a reality that there is no way for a third party other than a communication service provider to obtain location or traffic information of a terminal existing in a specific area for the purpose of public service. In particular, there is a limitation that the method of obtaining such information must be performed without affecting the existing communication equipment and communication network. In addition, many organizations, including telecommunications providers, also need to more accurately estimate the location of the terminal. In particular, it is necessary to accurately measure the location of the terminal for various purposes such as emergency rescue and location-based services.

The mobile communication system consists of a base station and a terminal. The conventional location estimation method estimates the location based on a signal transmitted by the terminal. In this case, a generally used method is to use a delay value of a signal required for a signal transmitted by a terminal to reach the base station. In addition, the distance between the base station and the terminal can be estimated based on the amount of propagation attenuation occurring in a channel through which a signal transmitted by the terminal reaches the base station. As a communication method used for this, various methods of communicating between a conventional base station and a terminal may be used.

The present invention relates to a technology for arranging one or more position measuring devices around a target terminal and measuring the position of the target terminal. An object of the present invention is to provide a method of controlling the operation of a location measuring device and a location measuring server so that the location of a target terminal can be more efficiently measured. In addition, it is intended to provide a method of efficiently setting an uplink channel set by a mobile communication base station.

In addition, it provides an efficient operation and protocol of a base station, a location measurement server, and a location measurement period of a mobile communication network related to location measurement of a target terminal.

In one aspect, the present embodiments include a communication unit that receives a measurement result of an uplink signal transmitted from a target terminal to a base station from a location finder, and a control unit that calculates the position of the target terminal based on the measurement result of the uplink signal. And, the control unit determines whether to change the setting information for the uplink signal transmitted from the target terminal based on the distance information between the target terminal and the location finder, and the communication unit transmits a request to change the setting information to the base station. A location measurement server can be provided.

In another aspect, the present embodiments include an uplink signal receiving unit receiving an uplink signal transmitted from a target terminal to a base station, a communication unit transmitting a measurement result of measuring an uplink signal to a base station or a location measurement server, and an uplink signal receiving unit. And a control unit for determining whether to perform an operation of detecting an uplink signal of the target terminal and whether the communication unit transmits the measurement result to the base station or the location measurement server, and the communication unit includes, from the base station or the location measurement server, the target terminal and the A position finder configured to receive change information of configuration information for an uplink signal changed based on distance information between position finders, and an uplink signal receiver may provide a position finder for receiving an uplink signal based on the change information.

In another aspect, the present embodiments provide a communication unit that receives a location request for a target terminal or a request for change of configuration information for an uplink signal from a location measurement server or a location measurement device, and is set for the target terminal according to a request for change of configuration information. It includes a control unit for changing setting information of an uplink signal and a transmitting unit for transmitting changed setting information to a target terminal, and the communication unit provides a base station that transmits change information of setting information according to a change request to a location measurement server or a location finder. can do.

According to the present invention, a position measuring device capable of performing position measurement of a target terminal more efficiently and a method of controlling the operation of a position measuring server are provided.

In addition, an efficient operation method and protocol between a base station, a location measurement server, and a location measurement device of a mobile communication network, which are required to measure the location of a target terminal, are presented.

1 is a diagram illustrating a conventional base station-based location measurement.
2 is a diagram showing the concept of position measurement according to the present disclosure.
3 is a diagram illustrating a signal measurement system according to an embodiment of the present disclosure.
4 is a flowchart illustrating an operation of a location measurement server according to an embodiment of the present disclosure.
5 is a diagram illustrating a transmission signal change method of a target terminal according to an embodiment of the present disclosure.
6 is a diagram for specifically explaining the operation of the location measurement server according to an embodiment of the present disclosure.
7 is a flowchart illustrating an operation of a position measuring device according to an embodiment of the present disclosure.
FIG. 8 is a diagram illustrating a transition process of activating/deactivating a positioning system according to a master position finder according to an embodiment of the present disclosure.
9 is a flowchart illustrating an operation of a base station according to an embodiment of the present disclosure.
10 is an implementation example of a location measuring device according to an embodiment of the present disclosure.
11 is an implementation example of a location measuring device according to another embodiment of the present disclosure.
12 is an implementation example of a base station in a mobile communication network according to an embodiment of the present disclosure.
13 is an implementation example of a location measurement server according to an embodiment of the present disclosure.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to elements of each drawing, the same elements may have the same numerals as possible even if they are indicated on different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof may be omitted.

In addition, in describing the constituent elements of the present invention, terms such as first, second, A, B, (a), (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, order, or number of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to that other component, but other components between each component It is to be understood that is "interposed", or that each component may be "connected", "coupled" or "connected" through other components.

The wireless communication system in the present invention is widely deployed to provide various communication services such as voice and packet data. The wireless communication system includes a user terminal (User Equipment, UE) and a base station (Base Station, BS, or eNB). A user terminal in the present specification is a generic concept that refers to a terminal in wireless communication, as well as UE (User Equipment) in WCDMA, LTE, and HSPA, as well as MS (Mobile Station), UT (User Terminal), and SS in GSM. It should be interpreted as a concept that includes all of (Subscriber Station) and wireless devices.

A base station or cell generally refers to a station that communicates with a user terminal, and a Node-B, an evolved Node-B (eNB), a sector, a site, and a BTS ( Base Transceiver System), an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and a small cell.

That is, in this specification, a base station or cell is interpreted in a comprehensive meaning indicating some areas or functions covered by a base station controller (BSC) in CDMA, a NodeB in WCDMA, and an eNB or sector (site) in LTE. It is meant to cover all coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, RU, and small cell communication range.

In the various cells listed above, since there is a base station controlling each cell, the base station can be interpreted in two meanings. i) In relation to the radio region, it may be the device itself that provides a mega cell, a macro cell, a micro cell, a pico cell, a femto cell, or a small cell, or ii) the radio region itself may be indicated. In i), all the devices that are controlled by the same entity that provide a predetermined wireless area are controlled by the same entity, or all devices that interact to form the wireless area in collaboration are instructed to the base station. The eNB, RRH, antenna, RU, LPN, point, transmission/reception point, transmission point, reception point, etc., according to the configuration method of the radio area, are an embodiment of the base station. In ii), from the viewpoint of the user terminal or the viewpoint of a neighboring base station, the radio region itself to receive or transmit a signal may be indicated to the base station.

Therefore, megacell, macrocell, microcell, picocell, femtocell, small cell, RRH, antenna, RU, LPN (Low Power Node), point, eNB, transmission/reception point, transmission point, and reception point are collectively referred to as a base station. do.

In the present specification, a user terminal and a base station are two transmitting and receiving subjects used to implement the technology or technical idea described in the present specification, and are used in a comprehensive sense, and are not limited by terms or words specifically referred to. The user terminal and the base station are two (Uplink or Downlink) transmitting/receiving subjects used to implement the technology or technical idea described in the present invention, and are used in a comprehensive sense and are not limited by terms or words specifically referred to. Here, the uplink (Uplink, UL, or uplink) refers to a method of transmitting and receiving data to the base station by the user terminal, and the downlink (Downlink, DL, or downlink) is transmitting and receiving data to the user terminal by the base station. It means the way to do it.

There are no restrictions on multiple access techniques applied to wireless communication systems. Various multiple access techniques such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), OFDM-FDMA, OFDM-TDMA, and OFDM-CDMA You can use An embodiment of the present invention can be applied to resource allocation in the asynchronous wireless communication field evolving to LTE and LTE-advanced, 5G through GSM, WCDMA, HSPA, and synchronous wireless communication field evolving to CDMA, CDMA-2000 and UMB. have. The present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention may be applied.

For uplink transmission and downlink transmission, a Time Division Duplex (TDD) scheme transmitted using different times may be used, or a Frequency Division Duplex (FDD) scheme transmitted using different frequencies may be used.

In addition, in systems such as LTE and LTE-advanced, standards are configured by configuring uplink and downlink based on one carrier or carrier pair. Uplink and downlink are PDCCH (Physical Downlink Control CHannel), PCFICH (Physical Control Format Indicator CHannel), PHICH (Physical Hybrid ARQ Indicator CHannel), PUCCH (Physical Uplink Control CHannel), EPDCCH (Enhanced Physical Downlink Control CHannel), etc. Control information is transmitted through the same control channel, and data is transmitted through a data channel such as a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).

Meanwhile, control information can also be transmitted using an enhanced PDCCH or extended PDCCH (EPDCCH).

In the present specification, a cell refers to a component carrier having coverage of a signal transmitted from a transmission/reception point or coverage of a signal transmitted from a transmission/reception point, and the transmission/reception point itself. I can.

The wireless communication system to which the embodiments are applied is a coordinated multi-point transmission/reception system (CoMP system) or a coordinated multi-antenna transmission system in which two or more transmission/reception points cooperate to transmit signals. antenna transmission system), a cooperative multi-cell communication system. The CoMP system may include at least two multiple transmission/reception points and terminals.

The multiple transmission/reception points are at least one that has a high transmission power or low transmission power in a macro cell area, which is wired controlled by being connected to a base station or a macro cell (hereinafter referred to as'eNB') and an eNB by an optical cable or optical fiber. It may be the RRH of.

Hereinafter, downlink refers to a communication or communication path from multiple transmission/reception points to a terminal, and uplink refers to a communication or communication path from a terminal to multiple transmission/reception points. In downlink, a transmitter may be a part of multiple transmission/reception points, and a receiver may be a part of a terminal. In the uplink, the transmitter may be a part of the terminal, and the receiver may be a part of the multiple transmission/reception points.

Hereinafter, a situation in which signals are transmitted/received through channels such as PUCCH, PUSCH, PDCCH, EPDCCH, and PDSCH may be expressed in the form of'transmitting and receiving PUCCH, PUSCH, PDCCH, EPDCCH and PDSCH'.

In addition, hereinafter, a description of transmitting or receiving a PDCCH or transmitting or receiving a signal through the PDCCH may be used to mean including transmitting or receiving an EPDCCH or transmitting or receiving a signal through an EPDCCH.

That is, the physical downlink control channel described below may refer to PDCCH or EPDCCH, and is also used to include both PDCCH and EPDCCH.

In addition, for convenience of explanation, an EPDCCH, which is an embodiment of the present invention, may be applied to a portion described as a PDCCH, and a PDCCH may be applied to a portion described as an EPDCCH as an embodiment of the present invention.

Meanwhile, high layer signaling described below includes RRC signaling for transmitting RRC information including RRC parameters.

The eNB performs downlink transmission to the terminals. The eNB is a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and downlink control information such as scheduling required for reception of the PDSCH and an uplink data channel (e.g. For example, a physical downlink control channel (PDCCH) for transmitting scheduling approval information for transmission in a physical uplink shared channel (PUSCH) may be transmitted. Hereinafter, transmission and reception of signals through each channel will be described in the form of transmission and reception of the corresponding channel.

As representative usage scenarios in New Radio (NR), which is currently being discussed in 3GPP, eMBB (enhanced mobile broadband), mMTC (massive machine type communication), and URLLC (Ultra Reliable and Low Latency Communication) have been proposed. In this regard, in the present specification, frequencies, frames, subframes, resources, resource blocks, regions, bands, subbands, control channels, data channels, synchronization signals, and various Reference signals, various signals, and various messages can be interpreted as meanings used in the past or present or in various meanings used in the future.

The present disclosure proposes an apparatus and method for estimating the position of a target terminal in a mobile communication system. In general, a mobile communication system consists of a base station and a terminal. In the present disclosure, one or more positioning devices are arranged around a target terminal requiring position measurement to measure a transmission signal of the target terminal, and based on this, the position of the target terminal is accurately measured.

In addition, the present disclosure relates to obtaining location information of target terminals in a wireless communication system.

In addition, the present disclosure is applicable to estimating the location of missing persons through a mobile communication system, estimating a location for lifesaving in the event of a disaster or distress, and providing a location-based service by accurately grasping the location of a terminal.

The present disclosure is expected to be applied to mobile communication base stations and services in the future.

The mobile communication system is the most correlated with the present disclosure, and is not limited to a specific mobile communication system unless it contradicts the technical idea according to the present disclosure.

The mobile communication system consists of a base station and a terminal. The conventional location estimation method estimates the location based on a signal transmitted by the terminal. In this case, a generally used method is to use a delay value of a signal required for a signal transmitted by a terminal to reach the base station. In addition, the distance between the base station and the terminal can be estimated based on the amount of propagation attenuation occurring in a channel through which a signal transmitted by the terminal reaches the base station. As a communication method for estimating a location of a terminal, various communication methods applied between a conventional base station and a terminal may be used.

A method for accurately measuring the location of a target terminal was proposed in the invention of Korean patent applications KR10-2019-0045762, KR10-2018-0114866, and KR10-2018-0101066. In the present invention, a device for acquiring uplink resource allocation information transmitted from a wireless communication system and an uplink signal receiver are included, and a terminal transmitting a signal to a corresponding uplink resource based on the acquired uplink resource allocation information is nearby. It is to obtain the location information of the terminal based on information such as whether or not, the signal size and time delay. In the above invention, the base station of the mobile communication network establishes a link with the target terminal. Further, the measurement information of the uplink channel of the target terminal measured by the location finder is sent to the location measurement server, and the location measurement server calculates the location of the target terminal.

In order to accurately measure the location of the target terminal, the target terminal must transmit an uplink signal for a certain period of time. In addition, the base station or the location finder measures the signal transmitted by the target terminal.

When the target terminal is in a call state, the terminal continuously exchanges signals with the base station. Therefore, the base station can perform distance or location measurement based on a signal transmitted by the terminal. If it is necessary for the terminal to transmit a specific signal with more accurate measurements, the base station can instruct the terminal to transmit the signal.

On the other hand, when the target terminal is in the standby state, most terminals do not transmit an uplink signal or transmit an uplink signal at a very low frequency. Therefore, it is very difficult for a base station or location finder to measure a distance or location based on a signal transmitted by a terminal.

In addition, in order for the location finder to accurately measure the signal of the target terminal, it is necessary to design an operation and protocol between the base station of the mobile communication network, the location measurement server, and the location finder.

The configuration of the mobile communication system is shown in FIG. 1. Referring to FIG. 1, the mobile communication system is composed of a base station 10 and a terminal 11. As a method of estimating the location of the terminal, the location is estimated based on the signal transmitted from the terminal 11. In this case, a method generally used is to use a propagation delay value of a signal required for a signal transmitted from the terminal 11 to reach the base station 10. In addition, the distance between the base station 10 and the terminal 11 can be estimated based on the amount of radio wave attenuation occurring in a channel through which a signal transmitted by the terminal 11 reaches the base station 10. In order to accurately measure the location of the target terminal, the target terminal must transmit an uplink signal for a certain period of time. In addition, the base station or the location finder measures the signal transmitted by the target terminal.

When the terminal 11 is in a call state, the terminal 11 continuously exchanges signals with the base station 10. Therefore, it is possible for the base station 10 to perform distance or location measurement based on a signal transmitted by the terminal 11. In addition, if it is necessary for the terminal 11 to transmit a specific signal with a more accurate measurement, the base station 10 may command the terminal 11 to transmit the signal. The specific signal may be a broadband periodic uplink signal.

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Further, in describing the present disclosure, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present disclosure, the detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present disclosure and may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification.

In the present disclosure, a method of efficiently measuring a location of a target terminal is proposed by exchanging signals with a base station and a terminal, and by arranging a location finder around a target terminal to track the location. The position measuring device of the present disclosure captures a signal transmitted by the target terminal and measures the position of the target terminal based on this. In order to accurately measure the position of the target terminal, one or more positioning devices may be arranged around the target terminal. Although the location measuring device of the present disclosure can be used by a person, it is also possible to install and use a vehicle or a drone. In addition, a conventional macro and small cell base station can be used as the location measuring device of the present invention.

2 shows the operation of the position measurement system proposed in the present disclosure. Referring to FIG. 2, in a mobile communication system, the base station 250 and the target terminal 210 exchange signals with each other. The position measuring device of the present invention is disposed around the target terminal 210 to be positioned to receive a signal transmitted from the target terminal 210, and the position of the target terminal 210 is measured based on this. At this time, the position of the target terminal 210 is measured based on the delay of the signal that the signal transmitted from the target terminal 210 reaches each position finder 220, the direction in which it is received, and the size of the received signal. In order to measure the position of the target terminal 210 more accurately, one or more position measuring devices 220, 230, and 240 may be disposed around the target terminal 210. In addition, it is possible to measure the position of the target terminal 210 more accurately by combining the size and time delay information of the signal received by the base station 250 and the information received by the location measuring device. In the above process, a directional antenna may be used in the position finder of the present disclosure to measure the direction in which the uplink signal of the target terminal is received.

As an example of the implementation of the location measuring device according to the present disclosure, Application No. 10-2018-0046139 “Location measurement method and apparatus of a mobile communication terminal”, Application No. 10-2018-0048825 “Setting uplink signals for location measurement of a mobile communication terminal. Method”, Application No. 10-2018-0101066 “Method and apparatus for measuring the location of a terminal in a mobile communication system”, Application No. 10-2019-0045762 “Position measurement system of a mobile terminal”. . In addition, a conventional base station may be used as a location finder.

3 is a diagram illustrating a signal measurement system according to an embodiment of the present disclosure. The signal measurement system of FIG. 3 may include a base station 310, a target terminal 320, a location measurement device 340 and 350, and a location measurement server 330.

Position measuring device 1 340 and position measuring device 2 350 shown in the signal measuring system of FIG. 3 may be located at different positions. In FIG. 3, movement information of a target terminal may be obtained using a plurality of location measuring devices.

For example, it is assumed that the distance between the two positioning devices 340 and 350 is d. If the target terminal having a certain RNTI moves from the position of the position finder 1 340 to the position of the position finder 2 350 during time T1, it is possible to obtain information that it takes time T1 to move between the two sections.

As another example, if the target terminal is located between the two position finders 340 and 350, the two position finders 340 and 350 may measure an uplink signal transmitted by the target terminal. In this case, the position of the target terminal may be measured based on the measurement results of two or more position measuring devices, and movement information of the target terminal 320 may be obtained based on this.

Here, each of the location measuring devices 340 and 350 transmits the measurement result of the uplink signal of the target terminal to the location measurement server 330, and the location measurement server 330 is based on the measurement result of the received uplink signal of the target terminal. It is possible to measure the location of the target terminal. At this time, each of the location measuring devices (340, 350) is the location measurement server 330, the RNTI information of the measured target terminal, location information including the distance between the target terminal and the location measuring device (340, 350) and measurement time. Can be transferred to.

In the present disclosure, an efficient operation of a location finder and a location measurement server for measuring an uplink signal transmitted by a target terminal and measuring the location of a target terminal based on the measurement is proposed. In addition, an efficient operation of a mobile communication system operating in conjunction with the position measuring device and the position measuring server is presented. In addition, a method of setting various operation modes for position measurement of a target terminal and efficiently controlling transitions and operations between these modes is presented.

In the present disclosure, it is proposed to set a long-distance mode with a distance between a target terminal and a location finder and a short-range mode with a close distance to set different operations of a location finder, a location measurement server, and a mobile communication base station accordingly.

It is preferable to measure the position of the target terminal based on a time delay or the like at a long distance between the target terminal and the position measuring device. On the other hand, when the distance is near, it is possible to obtain more accurate positioning results by positioning based on the received signal strength or RSSI (received signal strength indicator) information. And, in the intermediate area, the position of the target terminal is located by combining two pieces of information: time delay and received signal strength.

The change of the above-described positioning method may be performed by determining the position measurement server on the basis of the estimated position of the target terminal and the position information of the position measuring devices. However, in order to more efficiently measure the short-range and long-distance, it may be more efficient to change the operation mode by linking the change of the short-range and long-distance operations with the operations of the mobile communication base station and the location finder.

In the present disclosure, in order to measure the location of the target terminal, the target terminal must transmit an uplink signal. In the present disclosure, the target terminal may periodically or frequently transmit an uplink signal for a predetermined period of time. For example, in the case of an LTE system, a target terminal periodically or frequently transmits a PUSCH channel or an SRS channel. For example, the base station may request the target terminal to transmit specific data through a broadband uplink. In an embodiment, the base station may command to transmit the channel information for downlink measured by the target terminal at a very low MCS (the MCS having low data transmitted compared to the allocated resource) at a certain period. In another embodiment, the base station may command to transmit a parameter related to the transmission power of the target terminal (eg, a power head room report) or a parameter related to the function of the target terminal at a low MCS at a predetermined period. In addition, it is possible to periodically transmit the PUCCH.

In addition, the target terminal may be configured to transmit uplink signals having two or more different channel settings. Here, the two different channels are referred to as a first uplink signal and a second uplink signal. The first uplink signal is a signal characterized by high frequency transmission in a narrow band, and the second uplink signal may be set as a signal characterized by low frequency transmission in a wideband. For example, PUCCH and PUSCH can be transmitted. In addition, it may be configured to transmit PUCCH and SRS. Simultaneous setting of SRS and PUSCH is also possible. As another example of implementation, it is possible to simultaneously transmit a narrow-band frequent PUSCH configuration and a wide-band low-frequency PUSCH.

The location estimation of the target terminal of the present disclosure may be performed using one uplink signal, but may be performed based on measurements of a location finder and a base station based on these two or more different signals. The narrowband uplink signal is advantageous in calculating the average power of the target terminal. Broadband signals are used for more precise distance and position measurement by measuring propagation delay.

In the present disclosure, it is proposed to change and set the transmission bandwidth and transmission period of the uplink signal transmitted by the target terminal according to the location of the target terminal and the location of the location measuring device.

One of the embodiments of the present disclosure is to set the target terminal to transmit a wideband signal with a low frequency if the target terminal and the positioning devices are in a long distance. On the other hand, if the distance between the target terminal and the locator is close, a high frequency signal can be transmitted. In this case, in order to prevent excessive consumption of uplink resources, a narrowband signal with a high frequency may be transmitted.

According to an embodiment of the present invention, a wideband PUSCH can be transmitted at a low frequency (transmitted at a long period) over a long distance. On the other hand, it is possible to transmit a narrowband PUSCH with a high frequency (transmitted in a short period) in a short distance. Various channels can be used as a channel for transmitting at a high frequency in a short distance, and the PUCCH and SRS can be set to be transmitted at a higher frequency in a distance.

4 is a flowchart illustrating an operation of a location measurement server according to an embodiment of the present disclosure.

Referring to FIG. 4, the location measurement server may receive a measurement result of an uplink signal transmitted from a target terminal to a base station from the location location device (S100).

In a mobile communication system, a downlink signal transmitted by a base station to a target terminal and an uplink signal transmitted by a target terminal to a base station are transmitted and received between the base station and the target terminal. A location finder disposed around a target terminal to be located may receive an uplink signal transmitted from the target terminal. In order to measure the position of the target terminal more accurately, a plurality of position measuring devices may be arranged around the target terminal. The location measurement server may receive a measurement result of an uplink signal transmitted by the target terminal from the location measurement device through the communication unit.

Again, referring to FIG. 4, the location measurement server may determine whether to change the configuration information for the uplink signal transmitted from the target terminal based on distance information between the target terminal and the location measurement device (S110).

The base station may transmit, to the target terminal, configuration information for configuration of an uplink signal and allocation of radio resources for an uplink signal to be transmitted by the target terminal. According to an example, the configuration information for the uplink signal may include configuration information on at least one of a type of a channel through which an uplink signal is transmitted, a period in which an uplink signal is transmitted, or a bandwidth of an uplink signal. The target terminal may configure an uplink signal according to the received configuration information, and transmit the uplink signal to the base station using the allocated radio resource.

The position measurement of the target terminal is performed by the position finder receiving an uplink signal transmitted by the target terminal, and is performed based on a time delay or signal strength for the received uplink signal. In this case, when the distance between the target terminal and the position measuring device is a farther than a predetermined reference distance, it is preferable to measure the position of the target terminal based on a time delay. In contrast, when the distance between the target terminal and the location finder is closer than a predetermined reference distance, it is preferable to measure the location of the target terminal based on the received signal strength or RSSI (received signal strength indicator).

In addition, the narrowband uplink signal is advantageous in calculating the location of the target terminal using the strength of the received signal or RSSI. In contrast, the broadband uplink signal is advantageous in calculating the location of the target terminal using a time delay.

Therefore, when the distance information between the target terminal and the location finder is longer than the first reference distance, the location measurement server stores the configuration information for the uplink signal in a predetermined period lower than the reference period and a predetermined broadband wider than the reference bandwidth. You can decide to change it. That is, the location measurement server may be set to perform an operation for positioning the target terminal in a remote mode.

If the distance information between the target terminal and the location finder is shorter than the second reference distance, the location measurement server stores the configuration information for the uplink signal at a predetermined period higher than the reference period and a predetermined narrow band narrower than the reference bandwidth. You can decide to change it. That is, the location measurement server may be configured to perform an operation for positioning the target terminal in a short-range mode.

Alternatively, according to an example, the first reference distance may be set longer than the second reference distance. In this case, when the distance information between the target terminal and the location measuring device is located between the first reference distance and the second reference distance, the location measurement server may set an operation for positioning of the target terminal to be performed in the intermediate distance mode. In this case, time delay and signal strength may be used together to measure the location of the target terminal.

The location measurement server may transmit a request to change the setting information to the base station through the communication unit. In response to the change request, the base station may change the configuration information for the uplink signal and, based on this, request the target terminal to transmit the uplink signal according to the changed configuration information. Upon receiving the changed configuration information, the target terminal may change and transmit an uplink signal based on the configuration information.

5 is a diagram illustrating a transmission signal change method of a target terminal according to an embodiment of the present disclosure. Referring to FIG. 5, a long-distance mode and a short-range mode for uplink signal transmission of a target terminal are shown. In the long-distance mode, a long-period wideband signal is transmitted, and the position of the target terminal is calculated using a time delay as the main input. On the other hand, in the near-field mode, when a signal of a short period is transmitted, the position of the target terminal is calculated based on RSSI.

In the embodiment of FIG. 5, a case of switching to signals of two different characteristics is illustrated. However, by defining a new mode of the intermediate distance (there are three modes of far, medium and near), in this mode, two channels are transmitted simultaneously, and the position measurement of the target terminal takes into account both RSSI and time delay. can do.

In this way, it is possible to measure the uplink signal of the target terminal more efficiently by changing the transmission channel according to the distance between the target terminal and the location finder, or by changing the transmission period and the signal bandwidth.

In this way, the signal that the target terminal transmits for location measurement through the uplink can be changed according to the environment. This change is determined by the location measurement server and transmits a request to change the type or setting of a channel to the mobile communication base station for more efficient measurement, and the mobile communication base station may change the channel setting of the target terminal according to the request. In addition, the mobile communication base station notifies the location measurement server of the channel setting change, and the location measurement server notifies the location measurement device so that accurate measurement can be performed. In the above process, the determination of the location measurement may be performed based on whether the location finder and the target terminal are far away or near.

That is, the location measurement server may receive change information of the setting information according to the change request from the base station. When the base station changes the configuration information for the uplink signal of the target terminal, the change information may include information on the corresponding change. When settings for a channel, a period, a bandwidth, etc. transmitted by the base station are changed, information about this may be included in the change information.

The location measurement server can transmit the change information to the location measurement. The location finder enables the target terminal to accurately measure the uplink signal transmitted to the base station based on the received change information. In the above process, the determination of the location measurement may be performed based on whether the location finder and the target terminal are far away or near.

According to an example, the location measurement server may receive a request to change the configuration information of the uplink signal from the location measurement device. In this case, the location measurement server may determine whether to change the configuration information for the uplink signal transmitted from the target terminal based on the change request received from the location measurement device.

That is, the location measurement server may determine whether the change request from the location measurement device is a reasonable request based on distance information between the target terminal and the location measurement device. If it is determined as a reasonable request, the location measurement server may transmit a corresponding change request to the base station. Since the subsequent operation is substantially the same as described above, a detailed description will be omitted to avoid redundant description.

Alternatively, according to another example, when a request to change the configuration information of an uplink signal is received from the location measurement device, the location measurement server may transmit the received change request to the base station without a separate determination. Even in this case, since the subsequent operations are substantially the same as those described above, detailed descriptions will be omitted to avoid redundant description.

Again, referring to FIG. 4, the location measurement server may calculate the location of the target terminal based on the measurement result of the uplink signal (S120).

The location measurement server may select an algorithm for calculating the location of the target terminal based on configuration information for an uplink signal changed according to distance information between the target terminal and the base station.

When the distance information is a long distance longer than the first reference distance, the location measurement server may calculate the location of the target terminal based on an algorithm using time delay information among measurement results of the uplink signal. In addition, when the distance information is shorter than the second reference distance, the location measurement server may calculate the location of the target terminal based on an algorithm using RSSI among the measurement results of the uplink signal.

6 is a view for explaining in detail the operation of the location measurement server according to an embodiment of the present disclosure. Referring to FIG. 6, the location measurement server determines the location of the location measurement device and the target terminal based on the measurement result of the location measurement device (S200), and accordingly determines whether the near-distance measurement is advantageous or the long-distance measurement is advantageous (S210).

The location measurement server requests the mobile communication base station to change the uplink signal transmitted by the target terminal according to the determination result. In addition, the location measurement server determines whether to calculate the position of the target terminal based on the determination result (S220) or RSSI (S230) based on the determination result, and uses a differential algorithm taking this into account. Calculate the location of the target terminal. Thereafter, the location measurement server may receive measurement information from another location measurement device (S240) and perform the above operations repeatedly.

In another embodiment, the change of the channel, transmission period, and bandwidth of the target terminal may be requested by the location measurement server by inputting the user of the location measurement device to the location measurement device. Upon receiving this request, the location measurement server determines whether the request is reasonable, considers that it is reasonable, and requests it to the mobile communication base station. The subsequent process may be performed in the same manner as the case where the location measurement server requests the change described in FIG. 6.

In addition, in the above process, it is possible to omit the process of determining by the location measurement server for the request of the location location machine, and to accept the request from the location location machine as it is and request the mobile communication base station.

7 is a flowchart illustrating an operation of a position measuring device according to an embodiment of the present disclosure.

Referring to FIG. 7, the position finder may receive an uplink signal transmitted from a target terminal to a base station through an uplink signal receiving unit, and transmit a measurement result of measuring an uplink signal to the base station or a location measurement server through a communication unit. (S300).

The location finder may determine through the control unit whether the uplink signal receiver performs an operation of detecting the uplink signal of the target terminal and whether the communication unit transmits the measurement result to the base station or the location measurement server.

Again, referring to FIG. 7, the location finder may receive, from the base station or the location measurement server, change information of the configuration information for the changed uplink signal based on the distance information between the target terminal and the location finder (S310).

According to an example, the configuration information for the uplink signal may include configuration information on at least one of a type of a channel through which an uplink signal is transmitted, a period in which an uplink signal is transmitted, or a bandwidth of an uplink signal. The target terminal constructs an uplink signal according to the configuration information received from the base station, and transmits the uplink signal to the base station by using the allocated radio resource.

As described above, the position measurement of the target terminal is performed based on a time delay or signal strength of the received uplink signal by the position finder receiving an uplink signal transmitted by the target terminal. In this case, when the distance between the target terminal and the location finder is farther than a predetermined reference distance, the configuration information may be changed to transmit a wideband uplink signal of a low period. In contrast, when the distance between the target terminal and the location finder is closer than a predetermined reference distance, the configuration information may be changed to transmit a narrowband uplink signal having a high period.

According to an example, the location finder may further include an input unit for receiving a user input including a request to change the setting information. That is, the user of the location finder may input a request to change the configuration information of the uplink signal through the input unit. In this case, the location finder may transmit a request to change the setting information to the base station or the location measurement server through the communication unit.

Again, referring to FIG. 7, the position finder may receive an uplink signal based on the change information through the uplink signal receiving unit and measure information on the uplink signal (S320).

When the base station changes the configuration information on the uplink signal of the target terminal, the change information on the configuration information of the uplink signal may include information on the corresponding change. That is, when settings for a channel, a period, a bandwidth, etc. transmitted by the base station are changed, information about this may be included in the change information.

The location finder can more accurately receive an uplink signal transmitted from the target terminal to the base station on the basis of the received change information and accurately measure the corresponding information.

According to an example, the position measuring device may be registered as either a master position measuring device or a general position measuring device in the position measuring server. When registered as a master locator, the locator may be given the authority to request the end of the position measurement operation or a break for the target terminal.

Here, the rest of the position measurement operation for the target terminal may be set at a predetermined time or may be set based on distance information between the target terminal and the position measuring device. When the rest of the positioning operation is set to a predetermined time, it may be requested not to transmit an uplink signal to the target terminal for a predetermined time set by the master positioning device. Also, the location finders do not perform operations such as reception of uplink signals.

When the rest of the position measurement operation is set based on the distance information between the target terminal and the position finder, if the position of the target terminal is roughly acquired from a position farther than a certain distance, the position finder moves from the current position to near the corresponding position. In consideration of the required time, it is possible to prevent the position measurement operation from being performed during that time. Through this, it is possible to reduce the power consumption of the target terminal.

The location finder may transmit a request to stop or resume transmission of the uplink signal transmitted from the target terminal to the base station or the location measurement server in order to request a break from the location measurement operation for the target terminal.

Hereinafter, the operation of the position measuring device will be described in more detail based on the above description in FIG. 7.

According to another embodiment of the present disclosure, the position measuring devices of the present disclosure may communicate with each other to share the location and measurement information, and the position of the target terminal may be calculated based on this. In addition, the location finders of the present invention may transmit location and measurement information to one location finder, and allow the location finder to calculate the location of the target terminal. In this case, the user of the location finder may request to change the uplink transmission channel of the target terminal, change the period, and the bandwidth of the target terminal, and the location finder may request the change to the mobile communication base station. Upon receiving the request, the mobile communication base station changes the channel according to the request and informs the location finders so that the channel measurement for the target terminal can be performed.

In the present invention, it is premised that the approximate position of the target terminal is found using positioning using a conventional mobile communication network. In the above process, a device such as WIFI or GPS of the target terminal may be additionally used to find the location of the target terminal. In the above process, information of a cell of a mobile communication network to which the target terminal belongs and location information of a base station of the cell may be obtained. In addition, it is possible to obtain approximate location information of the target terminal. And, it is possible to obtain information on the accuracy of the location information of the target terminal. The accuracy of the location information may be given in the form of a radius around a specific location.

Searchers who have obtained the above information possess a location finder and request link formation with the target terminal near the target terminal. The link establishment request may be made by a searcher to request a call setup from a location measurement server through a location measurement device. In addition, it is possible to request call setup by directly inputting the request to the location measurement server.

When a call setup request is input, the location measurement server requests call setup from the mobile communication network. In general, in a mobile communication network, a target terminal and a base station capable of maintaining the best channel state are selected to perform call setup. Thereafter, the base station of the mobile communication network transmits call setup and uplink signal transmission setup information of the target terminal to the location measurement server. The location measurement server transmits the call setting and uplink signal transmission setting information of the target terminal to the location finder to perform signal detection and measurement for the target terminal. The above call setup information may include the fact that a call has been established.

As described above, a request such as a call setup request to the target terminal, a change in an uplink channel, a transmission period and a bandwidth change of a channel is required. As another method, the location measurement server can perform it by itself, or the person who operates the location measurement server can input it. One of the most efficient ways to do this is to perform a location measuring device near the target terminal. This can be done by inputting a request for the operation to the location location by the user of the early location measurement device.

The position finder may perform a request for call setup of the target terminal, change of an uplink channel, change of a transmission period or bandwidth of an uplink channel, and the like. However, it is more efficient to limit the locators that can do this than to allow all locators to make this request.

In the present invention, it is proposed to determine at least one of the position finders as a master, and allow only the position finder determined as the master to make the request. In doing so, only the holder of the mast-in locator can make the above requests, and the rest of the locator does not have such authority. That is, the user of the master position finder or the master position finder may request the following.

(One) Call setting of target terminal

(2) Change of uplink transmission channel of target terminal

(3) Change of transmission period or bandwidth of uplink transmission channel of target terminal

(4) End of location measurement for target terminal

(5) Position measurement break for the target terminal

In the above process, (4) and (5) make a request to stop signal transmission of the target terminal. In the case of (4), it is requested to end the position measurement of the target terminal is completed.

On the other hand, in the case of (5), it means that the position measurement is temporarily stopped. This may set a predetermined time and allow uplink signal transmission to be transmitted after that time. In addition, the master locator of the present invention can be restarted by requesting signal transmission from the target terminal again. In the case of (5), it can be used when the signal of the target terminal is detected from a distance, and the approximate position of the target terminal is measured and moved around it to perform measurement again.

8 shows the operation of the position measurement system according to the request of the master proposed in the present invention. Referring to FIG. 8, the master position finder makes a positioning request and an uplink signal of the target terminal is transmitted, and accordingly, the position finder and the position measuring server perform positioning. When the approximate position of the target terminal is determined by performing the positioning for a certain period of time, the positioning may be continuously performed, but the positioning can be temporarily stopped to reduce power consumption of the target terminal. In the meantime, the positioning devices can move to a position closer to the target terminal. Thereafter, the master requests to resume positioning of the target terminal again, and the location measurement server requests the base station to set uplink transmission of the target terminal to perform location measurement again. After a certain period of time, when the position measurement of the target terminal is completed, the master requests the end of the position measurement. It is a structure in which not all time intervals are determined in the past and lower, but is determined so that the time is changed at the request of the master position measuring device.

In the embodiment of Fig. 8, an embodiment in which the process is performed at the request of the master terminal is shown. However, it can be determined by the location measurement server to perform the above operation. In addition, it is possible to make a request to convert the change of the operation not only from the master positioning device but also from both the positioning server.

In order to designate a position finder that performs the function of such a master, it is necessary to register at least one position finder as a master in the position measuring server.

In the emergency rescue center or the conventional emergency rescue positioning system, the location measurement of the present invention is performed by transmitting the approximate location information such as the location of the base station where the target terminal is located, the operator information and the ID of the terminal to be searched to the location measurement server of the present invention. It begins. The ID of the terminal may be a phone number or a case number of the terminal. The location measurement system of the present invention does not need to additionally acquire the operator information of the target terminal by receiving the information of the above-described operator by the location measurement server. In communication with a mobile communication network to be used later, a request for call setup and operation conversion is transmitted to the operator with reference to the operator information. At this time, information such as an ID of a terminal and a cell ID may be transmitted to the communication service provider.

When the emergency rescue center or the conventional emergency rescue positioning system receives information on the target terminal, the location measurement server creates an event for the target terminal in the shopping mall and adds the information to the case list.

The location finder accesses the location measurement server and registers in one of the event lists to obtain basic information of the target terminal to be searched. The basic information may include an ID of the target terminal, a communication service provider, and simple information about the target terminal. In this process, the location registration server can set a password, and the location finder can connect to the location measurement server only by inputting the password to perform a task of finding a target terminal.

As another method, the location measurement server assigns a number and a password for the target terminal, and the location measurement server connects to the location measurement server and inputs the number and password to start the connection for the search for the target terminal. .

In this process, when the location measurement server sets the password for the location finder, the password for the master and the password for the general location finder can be set differently. The explorer who plays the role of the master connects as the master when accessing the location measurement server, and the general explorer accesses with the password of the general location finder as a general user. In this way, it allows the master searcher and the normal searcher to play different roles. Here, the function of the master locator performs more functions, including the function of a general locator.

For example, the master locator may arrive at the site and request call setup for the target terminal. In addition, after the search is finished, a request to end the search can be made. When a signal from the target terminal is not required for a certain period of time for movement, a request to temporarily stop transmitting an uplink signal from the target terminal may be made. In addition, when the location measurement of the target terminal is performed in a long distance/near distance, it is possible to request a setting change for each case.

In addition, the master user can allow new locators to be added to the search via the master locator. This can be implemented in such a way that the master terminal connects to the server so that an additional locator can be registered, and also a password at that time can be set. In addition, it is possible to exclude other location finders that have previously participated in the search from the ongoing search. This can be implemented in a way that prevents some of the location finders from participating in the operation of some of the location finders connected to the positioning server and performing the same task.

When the base station of the mobile communication network receives a location measurement request for the target terminal, it transmits the uplink signal configuration and resource allocation information of the target terminal, identification information of the target terminal such as RNTI, etc. to the location finder. The base station of the mobile communication network may directly transmit the information to the position finder, but may transmit the information to the communication server and the communication server to the position finder. The location measurement server may perform the role of the communication server. Based on the above information, the location finder of the present invention detects and measures an uplink signal of a target terminal.

In order for the position finder to detect and measure an uplink signal of a target terminal, it must acquire signal setting and resource allocation information of the uplink signal. As an example of the above process, the location finder may receive the identification information of the terminal, analyze a downlink signal transmitted from the base station based on the identification information, and obtain resource allocation information and signal setting information transmitted to the target terminal. The RNTI of the target terminal can be used as the identification information. In another embodiment, the base station of the mobile communication network notifies the location finder of uplink signal configuration and resource allocation information of the target terminal. In another embodiment, specific signal settings and resources are promised between a base station and a location measuring device of a mobile communication network in advance, and the base station sets uplink signal transmission of the target terminal according to the appointment, and whether the target terminal transmits the signal. You can only inform the location finder whether or not. It should be noted that the concepts proposed in the present invention can be applied to a wide range of techniques for measuring the position of a target terminal irrespective of the above-described methods.

9 is a flowchart illustrating an operation of a base station according to an embodiment of the present disclosure.

Referring to FIG. 9, the base station may receive a location request for a target terminal or a request for change of configuration information for an uplink signal from a location measurement server or a location detector through a communication unit (S400). The base station may transmit, to the target terminal, configuration information for configuration of an uplink signal and allocation of radio resources for an uplink signal to be transmitted by the target terminal. According to an example, the configuration information for the uplink signal may include configuration information on at least one of a type of a channel through which an uplink signal is transmitted, a period in which an uplink signal is transmitted, or a bandwidth of an uplink signal. The target terminal may configure an uplink signal according to the received configuration information, and transmit the uplink signal to the base station using the allocated radio resource.

The base station may change the configuration information of the uplink signal set for the target terminal in response to a request to change the configuration information through the control unit (S410). The base station may change configuration information for at least one of a channel through which an uplink signal is transmitted, a period, or a bandwidth of an uplink signal in response to a request for changing the configuration information.

The base station may transmit the changed configuration information to the target terminal through the transmitter. In addition, the base station may transmit the change information of the setting information according to the change request to the location measurement server or the location measurement through the communication unit (S420). In this case, according to an example, the transmission unit may be configured separately from the communication unit, but is not limited thereto. That is, the transmission unit and the communication unit may be integrated and implemented as one device.

10 is a diagram showing the configuration of a location measuring device according to an embodiment of the present disclosure. Referring to FIG. 10, the position finder of the present disclosure includes at least one downlink signal receiving unit 1010 and at least one uplink signal receiving unit 1020 to receive a mobile communication signal. In addition, the position finder includes a control unit 1030 that controls the received signal. Optionally, the location finder includes a communication unit 1040 capable of communicating with a base station or a location measurement server or another location finder, a GPS receiving unit 1070 that synchronizes with absolute time, and an input unit 1050 that receives an input from a user. , It may include a display unit 1060 that displays information processed by the control unit 1030.

Here, the downlink signal receiving unit 1010 and the uplink signal receiving unit 1020 may be an LTE downlink signal receiving unit and an LTE uplink signal receiving unit. In the present invention, the downlink signal receiver may operate by setting a frequency band in which control information on a frequency band in which the target terminal transmits an uplink signal is transmitted. Although the present invention has been described on the basis of an LTE system, it is understood that it can be easily applied to other wireless communication systems such as an NR system. That is, if the communication system in which the call of the target terminal is set is GSM or W-CDMA, the downlink receiving unit 1010 and the uplink receiving unit 1020 are implemented as receivers of the GSM or W-CDMA system, respectively.

The LTE downlink signal receiver is responsible for acquiring system time synchronization by capturing an initial downlink signal of LTE, and acquiring a base station ID and system information. Also, by measuring a signal transmitted from the base station, the strength of the downlink signal is measured and displayed on the display. In addition, the ID of the base station or whether it is in the service range of the desired base station is displayed. Through this, it is possible to check whether the user is within the service range of the desired base station. BCCH or the like is received through a downlink receiver and system information is obtained.

The LTE uplink signal receiver detects an uplink signal transmitted by the target terminal and performs measurement to obtain location-related information.

In order to detect and measure the uplink signal of the target terminal, the locator must acquire configuration and resource allocation information for the uplink signal transmitted by the target terminal. In one embodiment of the present invention, the location finder acquires the identification information of the target terminal, and based on this, receives the downlink signal transmitted by the base station using the downlink signal receiver 1010 and analyzes the downlink signal of the target terminal. Signal setting and resource allocation information can be obtained. In the above process, the base station of the mobile communication network may inform the location finder of the identification information of the target terminal after receiving a location request for the target terminal. In addition, after notifying the communication server of the information, the communication server may notify the location measuring device.

In addition, in another example of implementation of the present disclosure, uplink configuration and resource allocation information of the target terminal may be received from the communication server through the communication unit 1040, and a location measurement server may be used as the communication server. In another implementation example, a signal of a target terminal may be transmitted between a mobile communication network and a location measuring device at a predefined resource and time, and the resource allocation information and the setting information may be used. The controller 1030 controls a process of acquiring uplink channel setting and resource allocation information of the target terminal, and detecting and measuring a target terminal signal.

In addition, the location finder of the present disclosure may secure an absolute time reference to calculate a difference in time point at which each location finder receives an uplink signal from a target terminal. In the embodiment of FIG. 10, the location finders secure temporal synchronization based on the GPS signal received from the GPS receiver 1070 so as to play this role. In this process, not only GPS, but other technologies such as SBAS and Galileo, which are used for positioning or time information, can be used, or can be used in combination with GPS. However, according to the present disclosure, it is possible to secure time synchronization between different types of position measuring devices or use another method capable of discriminating a difference between an arrival time point. For example, it can be applied if a high-precision clock is used and the synchronization of the position measurement period is used in advance or the relative difference can be calculated. In addition, the time measurement may be performed based on a time difference between a time point at which a specific signal of the LTE downlink signal receiver is received and a time point at which an uplink signal of another user is received. Information on this reception time is transmitted to the location measurement server.

In the present disclosure, a separate communication unit 1040 may be used when communication with a location measurement server or direct communication with another location measurement device is required. The communication unit 1040 may use a band different from a band measuring the signal of the target terminal. This is because the communication device does not interfere with the uplink signal transmitted by the target terminal.

The location measuring device of FIG. 10 includes an output device such as a display to display the location of the target terminal to the user. In addition, an input unit 1050 for user input is provided. Through the input unit 1050, the user can input additional information such as manually inputting information on the location of the current location measuring device, thereby increasing the accuracy of location measurement. have. In addition, the searcher may input a positioning request for the target terminal through the input unit 1050.

The control unit 1030 of FIG. 10 controls the operation of the position measuring device described above. The control unit 1030 is connected to each of the devices and serves to control information reception, measurement, communication, input/output, and the like described in the present specification.

11 is a diagram showing the configuration of a location measuring device according to another embodiment of the present disclosure. The difference from the configuration of the position measuring device of FIG. 10 is that functions such as communication, display, and input devices with other external equipment (position measuring server or other position measuring device) are connected to an external terminal 1150 such as a smartphone or tablet. Therefore, it is implemented by reducing the number of parts of the position measuring device of the present invention.

The location finder 1100 of FIG. 11 includes a downlink signal receiving unit 1110, an uplink signal receiving unit 1120, a control unit 1130, and a GPS receiving unit 1140, and a communication function with other equipment, a display function, and an input Functions and the like are implemented by connecting to a terminal 1150 such as a commercial tablet or smart phone. The part indicated in the dotted rectangle of FIG. 11 is the implementation of the new type of position measuring device. The connection between the control unit 1130 and the terminal 1150 of FIG. 11 may be connected using a wired connection such as USB, but a wired connection such as WIFI may be used.

12 shows the structure of a base station in a mobile communication network according to the present disclosure. Referring to FIG. 12, a base station includes a downlink signal transmission unit 1210 and an uplink signal reception unit 1220. The downlink signal transmission unit 1210 functions to transmit signals to terminals. In addition, the uplink signal receiving unit 1220 functions to receive an uplink signal transmitted by terminals.

In addition, the base station of the mobile communication network includes a communication unit 1240 for transmitting RNTI information of the target terminal or channel setting and resource allocation information to the location finder. The base station notifies the position finder of the state of the target terminal. In addition, it is possible to transmit the cell ID of the base station forming a link with the target terminal and the cell ID information of the base station maintaining the adjacent time synchronization. The communication unit 1240 may directly transmit the information to a location measuring device. As another method, the information may be transmitted to a target terminal to another communication server, so that the communication server may transmit the information to a location measuring device. In this case, the position measurement server may be implemented to perform the role of the communication server.

In addition, the base station can communicate using a downlink transmitter and an uplink receiver without having a separate communication unit 1240 for transmitting identification information, channel setting and resource allocation information of the target terminal, and cell ID-related information of the base station. Please note. In addition, the control unit 1230 uses the downlink signal transmission unit 1210 and the uplink signal reception unit 1220 of the base station to set signal transmission to the target terminal. In addition, it performs a function of checking whether a signal set through the uplink signal receiving unit 1220 is properly received.

13 shows an embodiment of the configuration of the location measurement server of the present disclosure. The location measurement server includes a communication unit 1310. The communication unit 1310 has a communication function with a mobile communication network and a communication function with a location measuring device. The communication function with the mobile communication network receives identification information of a target terminal or uplink channel setting and resource allocation information.

In addition, the communication unit 1310 receives state information of the target terminal, cell ID information of a base station forming a link with the target terminal, and cell ID information of a base station maintaining adjacent time synchronization. In addition, when a location measurement request of a specific target terminal is transmitted to the location measurement server, a link setting request for the target terminal is transmitted to the mobile communication network. The location measurement request may be requested by a location measuring device or an emergency rescue center, or through the input device by connecting an input device to the location measurement server.

When the location finder requests location measurement, it is transmitted through the communication unit 1310. At this time, the target terminal's phone number, IMSI, etc. may be used as the identification information of the target terminal. Also, a serial number or TMSI of the terminal may be used. The communication function with the position finder performs communication with the position finder. The locator transmits the signal measurement result of the target terminal, and based on this, the locator server calculates the position of the target terminal and transmits it back to the locator. The signal measurement result includes information such as signal strength, time delay, and reception direction of the target terminal. In addition, it may include information on the location of the position measuring device and the time between measuring signals.

The location measurement server includes a control unit 1320. The control unit 1320 controls a function of requesting the mobile communication network to establish a link for the target terminal and receiving identification information or resource allocation and channel setting information of the target terminal from the base station of the mobile communication network. In addition, it receives the status information of the target terminal, the cell ID of the base station forming a link with the target terminal, and the cell ID information of the other base stations maintaining the adjacent time synchronization.

The location measurement server performs a function of transmitting information received from the mobile communication network to the location measurement device. In addition, it receives the uplink measurement result of the target terminal from one or more location finders, calculates the position of the target terminal, and transmits the result to the location finder. In addition, the control unit controls a function of receiving a location measurement request for a target terminal from a location finder or another device and transmitting the request to the mobile communication network.

As an example of the implementation of a location measuring device according to the embodiments of the present disclosure, Application No. 10-2018-0046139 “Location measurement method and apparatus of a mobile communication terminal”, Application No. 10-2018-0048825 “For location measurement of a mobile communication terminal. Uplink Signal Setting Method”, Application No. 10-2018-0101066 “Method and Device for Position Measurement of Terminal in Mobile Communication System”, Application No. 10-2019-0045762 “Position Measurement System for Mobile Terminal” You can use it or use it with some changes.

Embodiments of the present disclosure propose a system in which a target terminal transmits a signal of a different type according to an environment in a position measurement system for measuring a position of a target terminal, and a position measurement server calculates a position using a different algorithm. In addition, it is proposed to set the position measuring device of the master to give a control function different from that of the general position measuring device.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. In addition, since the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but are intended to describe the technical idea, the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10, 250, 310: base station
11, 210, 320: target terminal
220, 230, 240, 340, 350: positioning device
330: location measurement server

Claims (16)

A communication unit for receiving a measurement result of an uplink signal transmitted from the target terminal to the base station from the position finder; And
Including; a control unit for calculating the position of the target terminal based on the measurement result of the uplink signal,
The control unit determines whether to change setting information for an uplink signal transmitted from the target terminal based on distance information between the target terminal and the location finder,
The communication unit transmits a change request for the setting information to the base station. The method of claim 1,
Configuration information for the uplink signal,
A location measurement server comprising setting information on at least one of a type of a channel through which the uplink signal is transmitted, a period in which the uplink signal is transmitted, or a bandwidth of the uplink signal. The method of claim 1,
The control unit,
When the distance information is a long distance longer than the first reference distance, it is determined to change the configuration information for the uplink signal to a predetermined period lower than the reference period and a predetermined broadband wider than the reference bandwidth,
When the distance information is shorter than the second reference distance, the location measurement server determines to change the configuration information for the uplink signal to a predetermined period higher than the reference period and a predetermined narrow band narrower than the reference bandwidth. . The method of claim 3,
The control unit,
A location measurement server for selecting an algorithm for calculating the location of the target terminal based on setting information for the uplink signal changed according to the distance information. The method of claim 4,
The control unit,
When the distance information is a long distance longer than the first reference distance, the position of the target terminal is calculated based on an algorithm using time delay information among the measurement results of the uplink signal,
When the distance information is a short distance shorter than the second reference distance, the location measurement server calculates the location of the target terminal based on an algorithm using a received signal strength indicator (RSSI) among the measurement results of the uplink signal. The method of claim 1,
The communication unit,
A location measurement server for receiving change information of the setting information according to the change request from the base station and transmitting the change information to the location measuring device. The method of claim 1,
The control unit,
When a change request for the setting information is received from the location measuring device through the communication unit, determining whether to change the setting information for the uplink signal transmitted from the target terminal based on the change request received from the location measuring device , Location measurement server. The method of claim 1,
The communication unit,
When a change request for the setting information is received from the location measurement device through the communication unit, the location measurement server transmits a change request received from the location measurement device to the base station. An uplink signal receiver for receiving an uplink signal transmitted from the target terminal to the base station;
A communication unit for transmitting a measurement result of measuring the uplink signal to the base station or the location measurement server; And
A control unit for determining whether the uplink signal receiving unit performs an operation of detecting an uplink signal of the target terminal and whether the communication unit performs an operation of transmitting the measurement result to the base station or the location measurement server; and
The communication unit,
Receiving, from the base station or the location measurement server, change information of the setting information for the uplink signal changed based on the distance information between the target terminal and the location measurement device,
The uplink signal receiver,
A position finder for receiving the uplink signal based on the change information. The method of claim 9,
The setting information is,
A position measuring device comprising setting information on at least one of a type of a channel through which the uplink signal is transmitted, a period in which the uplink signal is transmitted, or a bandwidth of the uplink signal. The method of claim 9,
Further comprising; an input unit for receiving a user input including a change request for the setting information,
The communication unit,
A location measuring device for transmitting a change request for the setting information to the base station or the location measurement server. The method of claim 9,
The location measuring device,
A position measuring device registered as either a master position measuring device or a general position measuring device in the position measuring server. The method of claim 12,
The location measuring device,
When registered as a master positioning device, a position measuring device is given an authority to request the end or rest of the position measuring operation for the target terminal. The method of claim 13,
Rest of the position measurement operation for the target terminal,
A position measuring device that is set to a predetermined time or is set based on distance information between the target terminal and the position measuring device. The method of claim 13,
The communication unit,
In order to request a break from the location measurement operation of the target terminal, the location measurement device transmits a request to stop or resume transmission of an uplink signal transmitted from the target terminal to the base station or the location measurement server. A communication unit for receiving a location request for a target terminal or a request for change of configuration information for an uplink signal from a location measurement server or a location measurement device;
A control unit for changing configuration information of an uplink signal set for the target terminal in response to a request for changing the configuration information; And
Including; a transmitter for transmitting the changed setting information to the target terminal,
The communication unit,
Transmitting the change information of the setting information according to the change request to the location measurement server or the location measurement, the base station.

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