KR102608045B1 - Method and apparatus for allocating resource for positioning of user equipment - Google Patents

Abstract

These embodiments relate to a resource allocation method and device for measuring the location of a terminal, transmitting radio resource information to be allocated to a target terminal to a signal measuring device, and transmitting a call setup request message including radio resource information to a mobile communication system. Then, a call setup completion message containing resource allocation information for the target terminal according to the radio resource information is received from the mobile communication system, and information on the strength of the signal transmitted from the target terminal measured based on the radio resource information is received from the signal measuring device. It provides a location measurement server that receives and estimates the location of the target terminal.

Description

Resource allocation method and device for measuring the location of a terminal {METHOD AND APPARATUS FOR ALLOCATING RESOURCE FOR POSITIONING OF USER EQUIPMENT}

These embodiments relate to a resource allocation method and device for measuring the location of a terminal using a wireless communication system.

A mobile communication system consists of a base station and a terminal. Conventional location estimation methods estimate the location based on signals transmitted by the terminal. At this time, a commonly used method is to use the delay value of the signal required for the signal transmitted by the terminal to reach the base station. Additionally, the distance between the base station and the terminal can be estimated based on the amount of radio wave attenuation that occurs in the channel through which the signal transmitted by the terminal reaches the base station. The communication methods used for this purpose can be various methods of communicating between a conventional base station and a terminal.

In this disclosure, the terminal that is the target for measuring the location is called the target terminal. A method for accurate location measurement of a target terminal has been proposed in inventions such as Korean Patent Application No. KR10-2019-0045762, KR10-2019-0048789, KR10-2020-0161677, and KR10-2021-0053319. These inventions include a device for acquiring uplink resource allocation information transmitted from a wireless communication system and an uplink signal receiver, and a terminal that transmits a signal through the corresponding uplink resource based on the uplink resource allocation information is nearby. Location information of the terminal can be obtained based on information such as the size of the signal and time delay. In the above-described inventions, the base station of the mobile communication network forms a link with the target terminal. In addition, the measurement information of the uplink channel of the target terminal measured by the signal measurement device (may also be referred to as a signal measurement device or a position measurement device, etc.) is sent to the location measurement server, and the location measurement server calculates the location of the target terminal.

The location measurement method for the terminal described above can be used in applications that require various location information. In other words, it can be used to accurately determine the location of the terminal and provide various services based on that information.

Recently, in order to improve the success rate of emergency rescue of rescued people within the golden hour, the National Police Agency and the National Fire Agency have been increasing the demand for accurate location estimation of rescued people using wireless communication systems, and technology development for this is in progress. In particular, location estimation using the signal strength of the uplink signal of the rescue victim's terminal in a wireless communication system allows accurate location estimation not only outdoors but also indoors.

In order to measure the signal strength of the uplink signal of the rescued person's terminal, a technology that can randomly allocate uplink radio resources for the rescued person's terminal to wireless communication system devices is needed.

These embodiments are intended to propose a method and device for providing resource allocation to a specific terminal in order to measure the location of the target terminal.

An embodiment devised to solve the above-described problem controls the communication unit and the communication unit, transmits radio resource information to be allocated to the target terminal to a signal measuring device, and sends a call setup request message including radio resource information to the mobile communication system. Transmits, receives from the mobile communication system a call setup completion message containing resource allocation information for the target terminal according to the radio resource information, and measures the strength of the signal transmitted from the target terminal measured based on the radio resource information to the signal measuring device. It is possible to provide a location measurement server including a control unit that estimates the location of the target terminal by receiving information from the location.

In addition, another embodiment receives a call setup request message from the location measurement server, transmits radio resource information to be allocated to the target terminal included in the call setup request message to the base station system management system, and transmits the radio resource information to be allocated to the target terminal included in the call setup request message to the base station system management system. A network management system that transmits the setup request to the core system management system, a base station system management system that controls the base station system to allocate radio resources to the target terminal based on radio resource information, and a base station system management system that controls the base station system to allocate radio resources to the target terminal based on the radio resource information, and A mobile communication system including a core system management system that controls the core system to perform call setup can be provided.

In addition, another embodiment is a resource allocation method performed by a location measurement server, comprising the steps of transmitting radio resource information to be allocated to a target terminal to a signal measuring device, and sending a call setup request message including radio resource information to a mobile communication system. transmitting, receiving from the mobile communication system a call setup completion message containing resource allocation information for the target terminal according to the radio resource information, and information on the strength of the signal transmitted from the target terminal measured based on the radio resource information. It is possible to provide a method including the step of estimating the location of the target terminal by receiving it from a signal measuring device.

In addition, another embodiment is a resource allocation method performed by a mobile communication system, comprising: receiving a call setup request message from a location measurement server; A step of transmitting resource information to the base station system management system and transmitting the call setup request included in the call setup request message to the core system management system. The base station system is configured to allocate radio resources to the target terminal based on the radio resource information. A method may be provided including the step of controlling and controlling the core system to perform call setup for the target terminal based on the call setup request.

According to the present embodiments, radio resource information for the uplink to be allocated to the target terminal is directly determined, the target terminal transmits through the corresponding radio resource information, and the location is estimated by measuring this, thereby providing more precise information about the target terminal. Location information can be provided.

Figure 1 is a diagram illustrating the concept of call setup between a base station and a terminal in a mobile communication system.
Figure 2 is a diagram illustrating a positioning system based on an uplink signal of a target terminal of the present disclosure.
Figure 3 is a diagram for explaining a location measurement server according to an embodiment of the present disclosure.
FIG. 4 is a diagram illustrating a connection configuration between devices for measuring the location of a target terminal and operations for performing precise positioning on the target terminal according to an embodiment of the present disclosure.
Figure 5 is a diagram for explaining the operation between the location measurement server and the network management system according to an embodiment of the present disclosure.
Figure 6 is a diagram for explaining information included in a call setup request message according to an embodiment of the present disclosure.
Figure 7 is a diagram for explaining information included in a call setup completion message according to an embodiment of the present disclosure.
Figure 8 is a diagram for explaining a signal measuring device according to an embodiment of the present disclosure.
Figure 9 is a diagram for explaining a signal measuring device according to another embodiment of the present disclosure.
Figure 10 is a flowchart illustrating a resource allocation method for obtaining location information of a terminal performed by a location measurement server according to an embodiment of the present disclosure.
FIG. 11 is a flowchart illustrating a resource allocation method for obtaining location information of a terminal performed by a mobile communication system according to another embodiment of the present disclosure.

Hereinafter, some embodiments of the present disclosure will be described in detail through illustrative drawings. In adding reference numerals to components in each drawing, identical components may have the same reference numerals as much as possible even if they are shown in different drawings. Additionally, in describing the present disclosure, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present disclosure, the detailed description may be omitted.

Additionally, in describing the components of the present disclosure, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term. When a component is described as being “connected,” “coupled,” or “connected” to another component, that component may be directly connected or connected to that other component, but there is another component between each component. It will be understood that elements may be “connected,” “combined,” or “connected.”

Unless otherwise defined, all terms (including technical and scientific terms) used in the present disclosure may be used with meanings that can be commonly understood by those skilled in the art to which the embodiments of the present disclosure pertain. . Additionally, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless clearly specifically defined. In addition, the terms described below are terms defined in consideration of functions in the embodiments of the present disclosure, and may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the content throughout this disclosure.

Hereinafter, some embodiments of the present disclosure will be described in detail with reference to illustrative drawings. In adding reference numerals to components in each drawing, identical components may have the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In this disclosure, mobile communication systems are widely deployed to provide various communication services such as voice and packet data. The mobile communication system is explained as consisting of a user equipment (UE), a base station (BS), a core system (CS), and a management system to operate them, but in some cases, can be explained separately into a mobile communication system and a network management system.

The user terminal in this disclosure is a comprehensive concept meaning a terminal in wireless communication, including UE (User Equipment) in WCDMA, LTE, HSPA, etc., as well as MS (Mobile Station), UT (User Terminal), and SS in GSM. It should be interpreted as a concept that includes both subscriber stations and wireless devices.

A base station or cell generally refers to a station that communicates with a user terminal, and includes Node-B (Node-B), evolved Node-B (eNB), Sector, Site, and BTS ( It may be called by other terms such as Base Transceiver System, Access Point, Relay Node, RRH (Remote Radio Head), RU (Radio Unit), and small cell.

In other words, in the present disclosure, base station or cell is interpreted as a comprehensive meaning representing some area or function covered by BSC (Base Station Controller) in CDMA, NodeB in WCDMA, eNB or sector (site) in LTE, etc. It is meant to cover various coverage areas such as megacell, macrocell, microcell, picocell, femtocell, relay node, RRH, RU, and small cell communication range.

Since the various cells listed above have a base station that controls each cell, base station can be interpreted in two ways. 1) It may be the device itself that provides mega cells, macro cells, micro cells, pico cells, femto cells, and small cells in relation to the wireless area, or 2) it may indicate the wireless area itself. In 1), all devices providing a predetermined wireless area are controlled by the same entity or all devices that interact to collaboratively configure the wireless area are directed to the base station. Depending on how the wireless area is configured, a point, transmission/reception point, transmission point, reception point, etc. become an example of a base station. In 2), the wireless area itself where signals are received or transmitted can be indicated to the base station from the perspective of the user terminal or the neighboring 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 disclosure, a cell may mean coverage of a signal transmitted from a transmission/reception point, a component carrier having coverage of a signal transmitted from a transmission point or a transmission/reception point, or the transmission/reception point itself. You can.

In this disclosure, the core system is a comprehensive concept in wireless communication, and is a core system in GSM, WCDMA, LTE, HSPA, and IMT-2020 (5G or New Radio), including MSC (Mobile Switching Center) and GPRS (General Packet Radio Service). ), SGSN (Serving GPRS Support Node), GGSN (Gateway GPRS Support Node), EPC (Evolved Packet Core), MME (Mobility Management Entity), S-GW (Serving Gateway), P-GW (PDN Gateway), UPF ( It can be interpreted as a concept including User Plane Function), AMF (Access Management Function), SMF (Session Management Function), and PCF (Policy Control Function).

In the present disclosure, the user terminal and the base station are used in a comprehensive sense as two (uplink or downlink) transmitting and receiving entities used to implement the technology or technical idea described in the present invention and are not limited by any specific term or word. No.

Here, uplink (UL, or uplink) refers to a method of transmitting and receiving data from a user terminal to a base station, and downlink (Downlink, DL, or downlink) refers to a method of transmitting and receiving data from a base station to a user terminal. It means the way to do it.

Uplink transmission and downlink transmission may use the TDD (Time Division Duplex) method transmitted using different times, the FDD (Frequency Division Duplex) method transmitted using different frequencies, and the TDD method and FDD method. A mixed approach may be used.

Additionally, in a wireless communication system, the standard is configured by configuring uplink and downlink based on one carrier or carrier pair.

Uplink and downlink transmit control information through control channels such as PDCCH (Physical Downlink Control CHannel) and PUCCH (Physical Uplink Control CHannel), and PDSCH (Physical Downlink Shared CHannel), PUSCH (Physical Uplink Shared CHannel), etc. It is composed of the same data channel and transmits data.

Downlink may refer to communication or a communication path from multiple transmission/reception points to a terminal, and uplink may refer to communication or a communication path from a terminal to multiple transmission/reception points. At this time, in the downlink, the transmitter may be part of a multiple transmission/reception point, and the receiver may be part of the terminal. Additionally, in the uplink, a transmitter may be part of a terminal, and a receiver may be part of a multiple transmission/reception point.

Hereinafter, the situation in which signals are transmitted and received through channels such as PUCCH, PUSCH, PDCCH, and PDSCH is sometimes expressed as 'transmitting and receiving PUCCH, PUSCH, PDCCH, and PDSCH.'

Meanwhile, high layer signaling described below includes RRC signaling that transmits RRC information including RRC parameters.

The base station performs downlink transmission to terminals. The base station transmits downlink control information such as scheduling required for reception of the downlink data channel, which is the main physical channel for unicast transmission, and scheduling approval information for transmission on the uplink data channel. A control channel can be transmitted. Hereinafter, the transmission and reception of signals through each channel will be described in the form in which the corresponding channel is transmitted and received.

There are no restrictions on the multiple access techniques applied in wireless communication systems. Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Code Division Multiple Access (CDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Non-Orthogonal Multiple Access (NOMA), OFDM-TDMA, OFDM-FDMA, Various multiple access techniques such as OFDM-CDMA can be used. Here, NOMA includes Sparse Code Multiple Access (SCMA) and Low Density Spreading (LDS).

An embodiment of the present disclosure relates to resource allocation in the field of asynchronous wireless communication evolving through GSM, WCDMA, HSPA to LTE/LTE-Advanced, IMT-2020, and synchronous wireless communication evolving to CDMA, CDMA-2000, and UMB. It can be applied.

In this specification, a Machine Type Communication (MTC) terminal may mean a terminal that supports low cost (or low complexity) or a terminal that supports coverage enhancement. Alternatively, in this specification, an MTC terminal may mean a terminal defined in a specific category to support low cost (or low complexity) and/or coverage enhancement.

In other words, in this disclosure, the MTC terminal may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category/type that performs LTE-based MTC-related operations. Alternatively, in this specification, the MTC terminal supports improved coverage compared to the existing LTE coverage, or UE category/type defined in the existing 3GPP Release-12 or lower that supports low power consumption, or the newly defined Release-13 low cost (or low complexity) may mean UE category/type. Alternatively, it may mean a further Enhanced MTC terminal defined in Release-14.

In this disclosure, a NarrowBand Internet of Things (NB-IoT) terminal refers to a terminal that supports wireless access for cellular IoT. The goals of NB-IoT technology include improved indoor coverage, support for large-scale low-speed terminals, low latency sensitivity, ultra-low terminal cost, low power consumption, and optimized network structure.

As representative usage scenarios in NR (New Radio), which is currently being discussed in 3GPP, eMBB (enhanced Mobile BroadBand), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communication) are being raised.

In this disclosure, frequencies, frames, subframes, resources, resource blocks, regions, bands, subbands, control channels, data channels, synchronization signals, various reference signals, various signals, and various messages related to NR (New Radio) can be interpreted in a variety of meanings that may be used in the past or present, or may be used in the future.

Meanwhile, in the present disclosure, the target terminal is a terminal that is the target of location measurement and can be used in the same sense as the terminal of a rescued person. In addition, in the present disclosure, a device for measuring the location of a target terminal by acquiring an uplink signal of the target terminal is described as a device for measuring the location of the target terminal. However, these terms are for convenience of understanding, and may be replaced with terms such as information collection device, signal measuring device, and position measuring device as needed. In other words, the above-mentioned terms should be understood as referring to the same object. In this case, the device for measuring the location of the target terminal in the present disclosure refers to a terminal or a separate device that can measure the location of the target terminal, and there is no limitation on the device.

This embodiment describes a method and device for obtaining information about the location of a specific terminal in a wireless communication system, especially a mobile communication system.

In this embodiment, a new type of communication device equipped with both a downlink receiver and an uplink receiver is proposed. The proposed communication device may include one or more uplink signal receivers, and the one or more uplink signal receivers may be installed in different physical locations.

The communication device described in this embodiment can obtain information about which signal will be transmitted from the terminal to the base station through the uplink by analyzing the downlink signal transmitted by the base station. And, through the uplink signal receiver, it is possible to determine whether the uplink data is transmitted from the terminal to the base station and determine the location of the terminal.

The related field of these embodiments is technology for obtaining location and movement information of terminals in a wireless communication system. Applicable products and methods of these embodiments are traffic information and public services through a wireless communication system. These embodiments are expected to be applied in the future, and can be applied in various road control, traffic control, and security-related fields. These embodiments are expected to be applied in the future in areas where they can be applied to identify the movements of a specific user, such as in epidemiological investigations, or to function like CCTV based on signals transmitted by the terminal.

These embodiments can be applied to estimating the location of missing people through a mobile communication system, estimating location for lifesaving in the event of a disaster or distress, and providing location-based services by accurately determining the location of the terminal.

These embodiments are expected to be applied to mobile communication base stations and services in the future. The technology most relevant to these embodiments is the mobile communication system.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Also, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. The terms described below are defined in consideration of the functions in the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the contents throughout this specification.

Additionally, in the present disclosure, the mobile communication network may be interpreted to mean any one of the mobile communication network itself, at least one of the nodes constituting the mobile communication network, or a base station.

Meanwhile, the embodiments described below can be applied individually or in any combination.

The configuration of the mobile communication system is shown in Figure 1. When explained with reference to FIG. 1, a mobile communication system consists of a base station 10 and a terminal 11. As a terminal location estimation method, the location is estimated based on the signal transmitted by the terminal 11. At this time, a commonly used method is to use the propagation delay value of the signal required for the signal transmitted by 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 that occurs in the channel through which the 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. And the base station or signal measuring device 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, the base station 10 is capable of measuring distance or position based on the signal transmitted by the terminal 11. Additionally, if it is necessary for the terminal 11 to transmit a specific signal through more accurate measurement, the base station 10 can command the terminal 11 to transmit the signal. The specific signal may be a broadband periodic uplink signal.

In this disclosure, we propose a method of efficiently measuring the location of a target terminal by exchanging signals with a base station and a terminal and placing a signal measuring device around the target terminal whose location is to be tracked. The signal measuring device of the present disclosure captures a signal transmitted by the target terminal and measures the location of the target terminal based on this. In order to accurately measure the location of the target terminal, one or more signal measuring devices can be placed around the target terminal. The signal measuring device of the present disclosure can be carried and used by people, but it can also be installed and used in vehicles, drones, etc. Additionally, conventional macro and small cell base stations can be used as the signal measuring device of the present invention.

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

In the present disclosure, when measuring the location of a target terminal using the system of FIG. 2, it is necessary to establish a call between the target terminal and the serving base station. At this time, we propose a method in which the location measurement server provides radio resources to be used to establish a call between the target terminal and the serving base station.

Figure 3 is a diagram for explaining a location measurement server according to an embodiment of the present disclosure.

Referring to FIG. 3, the location measurement server may include a communication unit 110 and a control unit 120 that controls the operation of the location measurement server, including control of the communication unit. The communication unit 110 may be equipped with a communication function with external devices, such as a mobile communication system or a signal measuring device. Additionally, the communication unit 110 may be equipped with a communication function with communication devices installed in the emergency rescue center.

Additionally, the communication unit 110 may receive status information of the target terminal, cell ID information of a base station forming a link with the target terminal, and cell ID information of an adjacent base station maintaining time synchronization. Additionally, when a request for location measurement of a specific target terminal is transmitted to the location measurement server, a call setup request for the target terminal can be transmitted to the mobile communication system. The location measurement request may be requested from a signal measuring device or an emergency rescue center, or may be requested through an input device connected to the location measurement server.

When the signal measuring device requests location measurement, this is transmitted through the communication unit 110. At this time, the target terminal's phone number, IMSI, etc. may be used as identification information of the target terminal. Additionally, the terminal's serial number or TMSI, etc. may be used. The communication function with the signal measuring device functions to communicate with the signal measuring device. The signal measurement device delivers the signal measurement results of the target terminal, and based on this, the location measurement server calculates the location of the target terminal and transmits it back to the signal measurement device. The signal measurement results include information such as signal strength, time delay, and reception direction of the target terminal. Additionally, it may include information on the location of the signal measuring device and the time between signal measurements.

The control unit 120 of the location measurement server controls the function of requesting call setup for the target terminal from the mobile communication system and receiving resource allocation and call setup information for the target terminal from the mobile communication system. In addition, it receives the status information of the target terminal, the cell ID of the base station that has formed a link with the target terminal, and the cell ID information of other adjacent base stations that maintain time synchronization.

The location measurement server performs the function of transmitting information received from the mobile communication system to the signal measuring device. In addition, it receives uplink measurement results of the target terminal from one or more signal measurement devices, calculates the location of the target terminal, and transmits the results to the signal measurement device. Additionally, the control unit 120 controls the function of receiving a location measurement request for the target terminal from a signal measuring device or other device and transmitting the request to the mobile communication system.

When location measurement of the target terminal is requested from the emergency rescue center, the control unit 120 may transmit radio resource information to be allocated to the target terminal to the signal measuring device. The control unit 120 may transmit a call setup request message including radio resource information to be allocated to the target terminal to the mobile communication system. The control unit 120 may receive a call setup completion message from the mobile communication system including resource allocation information for the target terminal according to radio resource information. The control unit 120 may receive information on the strength of a signal transmitted from the target terminal measured based on radio resource information from a signal measuring device. The control unit 120 may estimate or calculate the location of the target terminal based on the received intensity information.

When identification information for the target terminal and a request for location measurement for the target terminal are received, the control unit 120 may transmit radio resource information to the signal measuring device. The control unit 120 can communicate with the mobile communication system through a gateway included in the mobile communication system. When the call setup completion message is received, the control unit 120 may transmit a command message to the signal measuring device to measure a signal transmitted from the target terminal according to radio resource information.

Hereinafter, an operation of performing resource allocation for a target terminal will be described in detail with reference to the related drawings.

FIG. 4 is a diagram illustrating a connection configuration between devices for measuring the location of a target terminal and operations for performing precise positioning on the target terminal according to an embodiment of the present disclosure. Figure 5 is a diagram for explaining the operation between the location measurement server and the network management system according to an embodiment of the present disclosure. Figure 6 is a diagram for explaining information included in a call setup request message according to an embodiment of the present disclosure. Figure 7 is a diagram for explaining information included in a call setup completion message according to an embodiment of the present disclosure.

Referring to FIG. 4, in order to measure the location of the target terminal 500 according to the present disclosure, the emergency rescue center 400, the location measurement server 100, the signal measuring device 300, and the mobile communication system 200 are configured and The connection relationship is shown.

The terms for the configuration of the mobile communication system shown in FIG. 4 are comprehensive concepts, including network management system, manager, manager system, orchestrator, LMS (LTE Management System), LSM (LTE System Manager), and CMS (Core Management System). , it should be interpreted as a concept that includes CSM (Core System Manager), etc.

Assume that an emergency rescue request is received at the emergency rescue center 400. In this case, the emergency rescue center 400 may request the location measurement server 100 to measure the location of the target terminal 500 owned by the rescued person. When requesting location measurement, the emergency rescue center 400 provides rescue information such as the rescue target's terminal phone number, location information of the target terminal acquired through the existing mobile carrier's location information system, rescue target's personal information, time of disappearance, and missing location. Information that can identify the subject can be transmitted to the location measurement server 100.

When identification information about the target terminal 500 and location measurement of the target terminal are requested from the emergency rescue center 400, the location measurement server 100 provides the identification information about the target terminal and radio resource information to be allocated to the target terminal. It can be transmitted to the signal measuring device 300. The corresponding radio resource information may be radio resource information about the uplink to be allocated to the target terminal so that the signal measuring device 300 can search for the uplink signal transmitted by the target terminal.

In this case, the location measurement server 100 may transmit a call setup request message including radio resource information to be allocated to the target terminal to the mobile communication system 200 (FIG. 5, 510). That is, the location measurement server 100 may request a call connection with the target terminal including the same resource information as the radio resource information transmitted to the signal measuring device through the mobile communication system 200.

The call setup request message may include parameters necessary for call setup with the target terminal. For example, the call setup request message, as shown in FIG. 6, includes the target terminal's phone number, location measurement method, resource block allocation information for location measurement, resource block transmission cycle for location measurement, and call setup information. It may include at least one of: However, this is an example and is not limited to this, and the information included in the call setup request message may further include other parameters as needed.

The location measurement server 100 can communicate with the mobile communication system through the gateway 211 included in the mobile communication system 200. For the security of operation within the mobile communication system 200, the interface with the location measurement server 100 may be equipped with a separate security gateway 211. Through this, you can thoroughly prepare for intrusion from the outside.

Referring to FIG. 4, the mobile communication system 200 includes, in addition to the gateway 211, a network management system 212, a base station system management system 213, a core system management system 214, a base station system 215, and a core system. (216) may be further included.

The network management system 212 may receive a call setup request message from the location measurement server 100 through the gateway 211 (FIG. 5, 520). The network management system 212 transmits the radio resource information to be allocated to the target terminal included in the call setup request message to the base station system management system (FIG. 5, 530), and sends the call setup request included in the call setup request message to the core system. It can be delivered to the management system (Figure 5, 540).

In other words, radio resource information for call connection of the target terminal is transmitted to the base station system and core system where the actual call connection is performed through the management system. The network management system 212 is the highest management system. The call setup parameters to be used in the base station are transmitted to the base station system 215 via the base station management system 213, and the call setup parameters to be used in the core system are managed by the core system. It can be delivered to the core system 216 via the system 214.

In this case, the base station system management system 213 can control the base station system to allocate radio resources to the target terminal based on the received radio resource information. The core system management system 214 can control the core system to perform call setup for the target terminal based on the call setup request. Accordingly, call setup and radio resource allocation of the target terminal can be performed in the base station system 215 and the core system 216.

The network management system 212 may receive radio resource allocation completion information from the base station system management system 213 (FIG. 5, 550). Additionally, the network management system 212 may receive call setup completion information from the core system management system 214 (FIG. 5, 560).

The network management system 212 transmits a call setup completion message containing information about resource allocation and call setup for the target terminal performed based on the call setup request message to the location measurement server 100 (FIGS. 5, 570, and 580) You can. That is, the network management system 212 can transmit information on whether call connection and radio resource allocation between the target terminal of the rescued person and the mobile communication system have been successfully performed.

The location measurement server 100 may receive a call setup completion message from the mobile communication system 200 including resource allocation information for the target terminal according to radio resource information.

The call setup completion message may include parameters necessary to report the call setup result with the target terminal. For example, the call setup completion message, as shown in FIG. 7, includes the target terminal's phone number, call setup result, frequency band, serving cell ID, cyclic prefix type, uplink synchronization, location measurement method, and location. It may include at least one of resource block allocation information for measurement, a transmission cycle of a resource block for location measurement, and call setup information. However, this is an example and is not limited to this, and the information included in the call setup completion message may further include other parameters as needed.

When the location measurement server 100 receives a call setup completion message indicating that the call connection and radio resource allocation with the target terminal have been successfully performed, the location measurement server 100 signals a command message to measure the signal transmitted from the target terminal according to the corresponding radio resource information. It can be transmitted to the measuring device.

The signal measuring device 300 receives radio resource information to be allocated to the target terminal from the communication unit, the uplink signal receiver, and the position measurement server through the communication unit, and transmits the signal transmitted from the target terminal based on the radio resource information to the uplink signal receiver. It may include a control unit that receives through.

When a command message for measuring a signal transmitted from the target terminal 500 according to radio resource information is received from the position measurement server 100, the signal measurement device 300 may receive a signal transmitted from the target terminal. However, this is just an example and is not limited to this. Since the corresponding radio resource information has been delivered to the signal measuring device 300 in advance, the signal measuring device 300 detects the target terminal 500 in the wireless resource in the time and frequency domain corresponding to the corresponding wireless resource information even if there is no separate command message. You may also attempt to measure the uplink signal from .

The signal measurement device 300 can measure the strength of an uplink signal transmitted from the target terminal 500 to the base station in the mobile communication system 200 and transmit the measured signal strength information to the position measurement server 100.

The location measurement server 100 may receive information on the strength of the signal transmitted from the target terminal measured based on radio resource information from the signal measuring device 300. The location measurement server 100 can estimate or calculate the location of the target terminal based on the received intensity information. The location measurement server 100 may transmit the acquired location information of the target terminal to the emergency rescue center 400 or the signal measurement device 300. Accordingly, accurate location information of the rescued person can be estimated and provided to the searcher through a signal measuring device.

According to this, radio resource information for the uplink to be allocated to the target terminal is directly determined, the target terminal transmits through the corresponding radio resource information, and the location is estimated by measuring this, thereby providing more precise location information for the target terminal. can do.

Figure 8 is a diagram showing the configuration of a signal measuring device according to an embodiment of the present disclosure. When described with reference to FIG. 8, the signal measuring device of the present disclosure includes one or more downlink signal reception units 810 and one or more uplink signal reception units 820 to receive mobile communication signals. Additionally, the signal measuring device includes a control unit 830 that controls the received signal. Optionally, the signal measuring device includes a communication unit 840 that can communicate with a base station or a position measurement server or another signal measuring device, a GPS receiving unit 870 that performs synchronization with absolute time, and an input unit 850 that receives input from the user. , may include a display unit 860 that displays information processed by the control unit 830.

Here, the downlink signal reception unit 810 and the uplink signal reception unit 820 may be a downlink signal reception unit and an uplink signal reception unit. In the present disclosure, the downlink signal receiver may operate by setting the frequency band in which the target terminal transmits the uplink signal to the frequency band in which control information is transmitted. Although the present disclosure is described based on the LTE system, it should be noted that it can be applied substantially equally to other wireless communication systems. That is, if the communication system in which the target terminal's call is set is GSM or W-CDMA, the downlink reception unit 810 and the uplink reception unit 820 are implemented as receivers of the GSM or W-CDMA system, respectively.

The downlink signal receiver captures the initial downlink signal, acquires system time synchronization, and acquires base station ID and system information. Additionally, the signal transmitted from the base station is measured to measure the strength of the downlink signal and displayed on the display. Additionally, it displays the ID of the base station or whether it is within the service range of the desired base station. This allows the user to check whether the service is within the service range of the desired base station. Receives BCCH, etc. through a downlink receiver and obtains system information.

The uplink signal receiver detects the 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 signal measuring device must obtain settings and resource allocation information for the uplink signal transmitted by the target terminal. In one embodiment of the present invention, the signal measuring device 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 810 and analyzes it to link the uplink signal of the target terminal. Signal settings and resource allocation information can be obtained. In the above process, the base station of the mobile communication network may receive a request for positioning the target terminal and then inform the signal measuring device of the identification information of the target terminal. In addition, the base station can inform the communication server of the above information, and then the communication server can inform the signal measuring device. In addition, in another example of the present disclosure, uplink configuration and resource allocation information of the target terminal can be received from a communication server through the communication unit 840, and a location measurement server can be used as the communication server. In another example, the signal of the target terminal may be set to be transmitted at a predefined resource and time between the mobile communication network and the signal measuring device, and the resource allocation information and setting information may be used. The control unit 830 obtains the uplink channel setting and resource allocation information of the target terminal and controls the process of detecting and measuring the target terminal signal.

In addition, the signal measuring device of the present disclosure can secure an absolute time standard and calculate the difference in time when each signal measuring device receives the uplink signal of the target terminal. In the example of FIG. 8, the signal measuring devices secure temporal synchronization based on the GPS signal received from the GPS receiver 870 to play this role. In this process, in addition to GPS, other technologies such as SBAS and Galileo, which are used for positioning or time information, can be used or used in combination with GPS. In addition, location measurement can be performed based on the time difference between the time when a specific signal from the downlink signal receiver is received and the time when another user's uplink signal is received. Information about this reception time is transmitted to the location measurement server.

In the present disclosure, when communication with a position measurement server or direct communication with another signal measuring device is required, a separate communication unit 840 can be used. The communication unit 840 may use a different band from the band that measures the signal of the target terminal. This is so that the communication device does not interfere with the uplink signal transmitted by the target terminal.

The signal measuring device in FIG. 8 is equipped with an output device such as a display to display the location of the target terminal to the user. In addition, an input unit 850 is provided for user input, and the user can input additional information, such as manually entering information on the current location of the signal measuring device, through the input unit 850 to increase the accuracy of location measurement. . Additionally, the searcher can input a positioning request for the target terminal through the input unit 850.

The control unit 830 of FIG. 8 controls the operation of the signal measuring device described above. The control unit 830 is connected to each device and performs the role of controlling information reception, measurement, communication, input and output, etc. described in this specification.

Figure 9 is a diagram showing the configuration of a signal measuring device according to another embodiment of the present disclosure. The difference from the configuration of the signal measuring device in FIG. 8 is that functions such as communication with other external equipment (position measurement server or other signal measuring device), display, and input device are connected to an external terminal 950 such as a smartphone or tablet. Therefore, the signal measuring device of the present disclosure was implemented by reducing the number of parts. The signal measuring device 900 of FIG. 9 includes a downlink signal receiver 910, an uplink signal receiver 920, a control unit 930, and a GPS receiver 940, and has communication functions with other equipment, display functions, and input. Functions, etc. are implemented by connecting to a terminal 950 such as a commercial tablet or smartphone. The part indicated within the dotted rectangle in Figure 9 is the implementation of a new type of signal measuring device. The connection between the control unit 930 and the terminal 950 in FIG. 9 may be made using a wired connection such as USB, or a wired connection such as WIFI may also be used.

Hereinafter, the resource allocation method for measuring the location of a terminal performed in the above-described location measurement server and mobile communication system will be described with reference to the related drawings. Among the above descriptions, overlapping descriptions have been omitted as much as possible, but the above descriptions can be applied substantially in the same manner.

Figure 10 is a flowchart illustrating a resource allocation method for obtaining location information of a terminal performed by a location measurement server according to an embodiment of the present disclosure.

Referring to FIG. 10, the location measurement server may transmit radio resource information to be allocated to the target terminal to the signal measuring device (S100).

Referring again to FIG. 10, the location measurement server may transmit a call setup request message including radio resource information to the mobile communication system (S110).

Referring again to FIG. 10, the location measurement server may receive a call setup completion message from the mobile communication system including resource allocation information for the target terminal according to radio resource information (S120).

Referring again to FIG. 10, the location measurement server can estimate the location of the target terminal by receiving information on the strength of the signal transmitted from the target terminal measured based on radio resource information from the signal measuring device (S130).

According to this, radio resource information for the uplink to be allocated to the target terminal is directly determined, the target terminal transmits through the corresponding radio resource information, and the location is estimated by measuring this, thereby providing more precise location information for the target terminal. can do.

FIG. 11 is a flowchart illustrating a resource allocation method for obtaining location information of a terminal performed by a mobile communication system according to another embodiment of the present disclosure.

Referring to FIG. 11, the mobile communication system can receive a call setup request message from the location measurement server (S200).

Referring to FIG. 11, the mobile communication system transmits radio resource information to be allocated to the target terminal included in the call setup request message to the base station system management system, and sends the call setup request included in the call setup request message to the core system management system. (S210), and the base station system can be controlled to allocate radio resources to the target terminal based on the radio resource information (S220).

Referring to FIG. 11, the mobile communication system can control the core system to perform call setup for the target terminal based on a call setup request (S230).

According to this, radio resource information for the uplink to be allocated to the target terminal is directly determined, the target terminal transmits through the corresponding radio resource information, and the location is estimated by measuring this, thereby providing more precise location information for the target terminal. can do.

Additionally, terms such as "system", "processor", "controller", "component", "module", "interface", "model", "unit", etc. generally refer to computer-related entities hardware, a combination of hardware and software, It can refer to software or running software. By way of example, but not limited to, the foregoing components may be a process, processor, controller, control processor, object, thread of execution, program, and/or computer run by a processor. For example, both an application running on a controller or processor and the controller or processor can be a component. One or more components may reside within a process and/or thread of execution, and a component may reside on one system or be distributed across two or more systems.

The standard contents or standard documents mentioned in the above-described embodiments are omitted to simplify the description of the specification and constitute a part of the present specification. Therefore, addition of the above standard content and part of the content of standard documents to this specification or description in the claims should be construed as falling within the scope of the present invention.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and 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 in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

Claims (11)

Ministry of Communications; and
Controls the communication unit, transmits radio resource information to be allocated to the target terminal to a signal measuring device, transmits a call setup request message including the radio resource information to a mobile communication system, and sends a call setup request message including the radio resource information to the target terminal according to the radio resource information. Receive a call setup completion message containing resource allocation information from the mobile communication system, and receive information on the strength of the signal transmitted from the target terminal measured based on the radio resource information from the signal measuring device to determine the location of the target terminal. A position measurement server including a control unit that estimates . According to claim 1,
The control unit,
A location measurement server that communicates with the mobile communication system through a gateway included in the mobile communication system. According to claim 1,
The call setup request message is:
A location measurement server including at least one of the target terminal's phone number, a location measurement method, resource block allocation information for location measurement, a transmission cycle of a resource block for location measurement, and call setup information. According to claim 1,
The call setup completion message is:
Telephone number of the target terminal, call setup result, frequency band, ID of serving cell, cyclic prefix type, uplink synchronization, location measurement method, resource block allocation information for location measurement, transmission cycle of resource block for location measurement and a location measurement server including at least one of call setup information. Receives a call setup request message from the location measurement server, transmits radio resource information to be allocated to the target terminal included in the call setup request message to the base station system management system, and sends the call setup request included in the call setup request message to the core a network management system that communicates to a system management system;
A base station system management system that controls the base station system to allocate radio resources to the target terminal based on the radio resource information; and
A mobile communication system comprising a core system management system that controls the core system to perform call setup for the target terminal based on the call setup request. According to claim 5,
A mobile communication system further comprising a gateway that communicates with a location measurement server. According to claim 5,
The network management system is,
A mobile communication system that transmits a call setup completion message containing information on resource allocation and call setup for the target terminal performed based on the call setup request message to a location measurement server. According to claim 5,
The base station system management system is,
It performs the operation, configuration, and statistical functions of the base station system, and when a radio resource allocation request is received from the network management system, it requests the base station system to allocate radio support according to the radio resource allocation request and returns the radio resource allocation result. Communication system. According to claim 5,
The core system management system is,
A mobile communication system that performs the operation, configuration, and statistical functions of the core system, and when a call setup request is sent from the network management system, requests the core system to set up a call according to the call setup request and returns a call setup result. In the resource allocation method performed by the location measurement server,
Transmitting radio resource information to be allocated to the target terminal to a signal measuring device;
Transmitting a call setup request message including the radio resource information to a mobile communication system;
Receiving a call setup completion message from a mobile communication system including resource allocation information for the target terminal according to the radio resource information; and
A method comprising the step of receiving strength information of a signal transmitted from the target terminal measured based on the radio resource information from the signal measuring device to estimate the location of the target terminal. In the resource allocation method performed by the mobile communication system,
Receiving a call setup request message from a location measurement server;
Forwarding radio resource information to be allocated to the target terminal included in the call setup request message to the base station system management system through the network management system, and transmitting the call setup request included in the call setup request message to the core system management system. ;
Controlling a base station system to allocate radio resources to the target terminal based on the radio resource information; and
A method comprising controlling a core system to perform call setup for the target terminal based on the call setup request.

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