WO2023121324A1

WO2023121324A1 - Mobile communication uplink signal transmission setting method and device for position measurement of terminal

Info

Publication number: WO2023121324A1
Application number: PCT/KR2022/021013
Authority: WO
Inventors: 문희찬
Original assignee: 한양대학교 산학협력단
Priority date: 2021-12-21
Filing date: 2022-12-21
Publication date: 2023-06-29

Abstract

The present disclosure relates to a method and a device for efficiently setting an uplink signal between a terminal and a base station in order to identify the position of the terminal in a mobile communication system. In the present disclosure, a resource to be allocated for terminal positioning is determined on the basis of the requirements of a positioning-based service, and whether positioning conditions are satisfied is determined on the basis of position information about the terminal, and thus an uplink can be efficiently set for various applications requiring position measurement for a target terminal, and the conditions required by each application can be satisfied.

Description

Mobile communication uplink signal transmission setting method and apparatus for location measurement of terminal

The present disclosure relates to a method and apparatus for efficiently setting an uplink signal between a target terminal and a base station in order to locate a terminal in a mobile communication system.

A mobile communication system is composed of a base station and a terminal. The conventional terminal location estimation method estimates the position of a corresponding terminal based on a signal transmitted by the terminal. At this time, a commonly used method is to use a delay value of a signal transmitted by a terminal to reach a base station. In addition, the distance between the base station and the terminal can be estimated based on the amount of radio wave attenuation occurring in the channel through which the signal transmitted by the terminal reaches the base station. In other words, in the conventional method of estimating the position of a terminal in a mobile communication system, a base station receives a signal transmitted by a terminal, and estimates the position of the terminal based on a delay of the received signal on a wireless channel, radio wave attenuation, and the like.

In order to measure more accurately than the conventional location estimation method of a terminal, a signal measurer for measuring the location of a terminal based on an uplink signal transmitted by a mobile communication terminal and a method for calculating the location of a terminal based on the measurements Various techniques have been proposed. Regarding positioning based on an uplink signal transmitted by such a terminal, it is necessary to design a specific method for determining whether to apply the positioning method based on an uplink signal together with the conventional location estimation method and requesting a method.

The present disclosure presents a method for setting uplink transmitted by a target terminal considering various scenarios and applications in relation to a technology for measuring the location of a target terminal by utilizing an uplink signal transmitted by a target terminal used for various purposes. do.

An embodiment devised to solve the above-described problem performs uplink resource allocation for a target terminal to be measured when an uplink-based positioning request for a communication unit and a target terminal is received, but with respect to the target terminal It is possible to provide a base station including a controller that determines resources to be allocated for positioning of a target terminal based on the requirements of the provided positioning-based service and allocates the determined resources to the target terminal.

In addition, another embodiment is an uplink signal transmitted from a target terminal to a base station based on location information of a target terminal based on at least one of a communication unit and a global navigation satellite system (GNSS), Wi-Fi, or downlink transmission of a base station. It is determined whether the positioning condition based on the uplink signal is satisfied, and if it is determined that the positioning condition based on the uplink signal is satisfied, the communication unit transmits the uplink-based positioning request to a mobile communication network or to at least one signal measurer that performs the uplink-based positioning. It is possible to provide a location measurement server including a control unit that transmits through.

In addition, another embodiment obtains location information based on at least one of a communication unit and a global navigation satellite system (GNSS), WiFi, or downlink transmission of a base station, and determines that a positioning condition based on an uplink signal is satisfied In this case, it is possible to provide a terminal including a control unit for transmitting an uplink-based positioning request to at least one of a mobile communication network and a positioning server through the communication unit.

In the present disclosure, in order to apply uplink-based positioning to various applications and scenarios, a signaling method for notifying this may be presented. In addition, a method for efficiently setting an uplink signal can be presented to satisfy the conditions required in the various applications described above. In addition, a method of improving positioning performance by combining uplink-based positioning with conventional positioning can be proposed.

The present disclosure provides a method and apparatus for setting mobile communication uplink signal transmission for location measurement of a terminal that can satisfy conditions required by each application by efficiently setting uplink for various applications requiring location measurement of a target terminal. can provide

1 is a diagram illustrating call setup between a base station and a terminal in a conventional mobile communication system.

2 is a diagram illustrating an uplink-based positioning system of a target terminal according to an embodiment of the present disclosure.

3 is a flowchart illustrating an operation of a positioning system according to an embodiment of the present disclosure.

4 is a diagram for explaining a signal flow between components for positioning according to an embodiment of the present disclosure.

5 is a diagram for explaining a signal flow between components for positioning according to another embodiment of the present disclosure.

6 is a diagram for explaining a signal flow between components for positioning according to another embodiment of the present disclosure.

7 is a diagram showing the configuration of a signal measurer according to an embodiment of the present disclosure.

8 is a diagram showing the configuration of a signal measurer according to another embodiment of the present disclosure.

9 illustrates an embodiment of start conditions and end conditions of uplink signal-based positioning according to an embodiment of the present disclosure.

10 is a diagram illustrating a configuration of a base station according to an embodiment of the present disclosure.

11 is a diagram showing the configuration of a location measurement server according to an embodiment of the present disclosure.

12 is a diagram illustrating the configuration of an uplink-based positioning system according to an embodiment of the present disclosure.

13 is a diagram illustrating a configuration of a terminal according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention are described in detail below with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same numerals as much as possible even if they are displayed on different drawings. In addition, in 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.

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

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

That is, in the present specification, a base station or cell refers to some area or function covered by a base station controller (BSC) in CDMA, a NodeB in WCDMA, an eNB or sector (site) in LTE, and a gNB in NR. It should be interpreted in a comprehensive sense, and it means to cover various coverage areas such as megacell, macrocell, microcell, picocell, femtocell, relay node, RRH, RU, and small cell communication range.

Since there is a base station controlling each cell in the various cells listed above, the base station can be interpreted in two meanings. i) a device itself that provides a megacell, macrocell, microcell, picocell, femtocell, or small cell in relation to a radio area, or ii) may indicate the radio area itself. In i), all devices providing a predetermined radio area are controlled by the same entity or all devices interacting to cooperatively configure the radio area are directed to the base station. An eNB, an RRH, an antenna, an RU, an LPN, a point, a transmission/reception point, a transmission point, a reception point, and the like become an embodiment of a base station according to a configuration method of a radio area. In ii), the wireless area itself in which signals are received or transmitted can be indicated to the base station from the viewpoint of the user terminal or the neighboring base station.

Therefore, megacells, macrocells, microcells, picocells, femtocells, small cells, RRHs, antennas, RUs, LPNs (Low Power Nodes), points, eNBs, transmission and reception points, transmission points, and reception points are collectively referred to as base stations. do.

In this specification, a user terminal and a base station are two transmitting and receiving subjects used to implement the technology or technical idea described in this specification, and are used in a comprehensive sense and are not limited by specific terms or words. The user terminal and the base station are two (uplink or downlink) transmitting and 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 specific terms or words. Here, uplink (UL, or uplink) means a method of transmitting and receiving data to and from a base station by a user terminal, and downlink (Downlink, DL, or downlink) means a method of transmitting and receiving data to and from a base station by a base station means the way

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

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

The base station performs downlink transmission to terminals. The base station transmits a physical downlink shared channel (PDSCH), which is a main physical channel for unicast transmission, and downlink control information such as scheduling required for reception of the PDSCH and an uplink data channel (eg, For example, a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted. Hereinafter, transmission and reception of signals through each channel will be described as a form in which the corresponding channel is transmitted and received.

In the present disclosure, a target terminal is a concept including a mobile phone, a smart phone, a tablet, a smart watch, and the like, which are targets of location measurement. That is, it can be interpreted as a concept including a terminal capable of communicating with a base station, a repeater, or another terminal by mounting a mobile communication transceiver.

In the present disclosure, GPS (Global Positioning System) refers to GNSS (Global Navigation Satellite System), which is a comprehensive concept of technology for locating a location based on satellite signals. Since various GNSS systems are applied in various countries, GPS in the present invention will be described as a comprehensive concept including these.

In the present disclosure, a location measurement server refers to a server having a function of calculating the location of a target terminal based on a measurement value of an uplink signal of the target terminal. In addition, another function of the positioning server is to provide an interface between the mobile communication network and the signal measurer. These two functions can be separated and operated as two servers. The location measurement server of the present disclosure can be interpreted as a server having a function of providing an interface between a mobile communication network and a signal measurer.

The present disclosure is applicable to estimating the location of missing people through a mobile communication system, estimating the location for lifesaving in the event of a disaster or distress, and providing location-based services by accurately locating a terminal.

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

The present disclosure is most relevant to a mobile communication system.

1 is a diagram illustrating call setup between a base station and a terminal in a conventional mobile communication system. Referring to FIG. 1, a mobile communication system is composed of a base station 10 and a terminal 11. As a method of estimating the location of a terminal, its location is estimated based on a signal transmitted by the terminal 11. In this case, a commonly used method is to use a propagation delay value of 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 propagation attenuation generated in the channel through which the signal transmitted by the terminal 11 reaches the base station 10. In order to accurately measure the position of the target terminal, the target terminal must transmit an uplink signal for a certain period of time. And the base station or signal measurer 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 can perform distance or location measurement based on the signal transmitted by the terminal 11. In addition, when it is necessary for the terminal 11 to transmit a specific signal with more accurate measurement, the base station 10 may command the terminal 11 to transmit the signal. The specific signal may be a wideband periodic uplink signal.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. And, 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. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, the definition should be made based on the contents throughout this specification.

The present invention proposes a method for efficiently measuring the position of a target terminal by exchanging signals between a base station and a terminal and arranging a location measurement device around a target terminal to track the location. The position measuring device of the present invention captures a signal transmitted by a target terminal and measures the position of the target terminal based on this. In order to accurately measure the location of the terminal, one or more of the location measurement devices may be disposed around the terminal. Although the position measuring device of the present invention can be carried and used by a person, it is also possible to use it by installing it in a vehicle or a drone. In addition, conventional macro and small cell base stations can be used as the signal measurer of the present invention.

2 shows the operation of a technique for measuring the location of a target terminal based on such a mobile communication uplink signal. Referring to FIG. 2, an uplink signal transmitted from the target terminal is measured using one or more signal measurers (100_1, 100_2, 100_3) around the target terminal 200 to measure the location, and based on the measurement, the target Calculate the location information of the terminal. 2 shows an embodiment in which the signal measurer transmits the measurement result to the location measurement server 400 and the location measurement server calculates the location information of the target terminal.

Referring to FIG. 2 , a base station 300 and a terminal 200 exchange signals with each other in a mobile communication system. The signal measurers 100_1, 100_2, and 100_3 of the present disclosure are disposed around a terminal (hereinafter referred to as a target terminal or target terminal) 200 to measure a position, receive a signal transmitted by the target terminal 200, and locate the position The measurement server 400 measures the position of the target terminal 200 based on this.

At this time, the position of the target terminal 200 is measured based on the delay of the signal transmitted by the target terminal 200 and the size of the received signal and the like reaching the respective signal measurers 100_1, 100_2, and 100_3.

In addition, the signal measurer may measure the position of the target terminal using the angle or direction at which the signal is received. As an example, the signal measurer may include one or more uplink signal receivers, and the signal measurer may combine angles or directions at which uplink signals are received from antennas connected to each uplink signal receiver, reception time, and received power information. Thus, the location of the target terminal can be measured.

As another example, the signal measurer may include one or more uplink signal receivers, and the signal measurer transmits angle or direction information at which an uplink signal is received from an antenna connected to each uplink signal receiver to a positioning server, The location measurement server may measure the location of the target terminal by combining the reception angle or reception direction information of the received signal, the reception time point, and the reception power information. A larger number of signal measurers can be placed around the target terminal 200 for more accurate location measurement.

In addition, the position of the target terminal 200 can be more accurately measured by combining the magnitude and time delay information of the signal received from the base station 300 and the information received from the position measuring device. In the above process, a directional antenna may be used in the signal measurer of the present invention to measure the direction in which the uplink signal of the target terminal is received.

In the above invention, an apparatus for acquiring uplink resource allocation information transmitted in a wireless communication system and an uplink receiver are included, and based on the uplink resource allocation information, whether a terminal transmitting a signal to a corresponding uplink resource is nearby. , the location information of the terminal is obtained based on information such as the signal strength and time delay. In the above invention, a base station of a mobile communication network forms a link with a target terminal. In addition, the measurement information of the uplink channel of the target terminal measured by the signal measurer is transmitted to the location measurement server, and the location measurement server calculates the location of the target terminal.

Korean Patent Application Nos. 10-2018-0046139, 10-2018-0048825, 10-2018-0101066, 10-2019- 0045762, 10-2019-0045762, 10-2021-0117959, 10-2021-0165701, 10-2021-0166236, 10-2021-0165911, 10-2022-0035557 and 10-2022-00 96368 et al. Embodiments for the configuration and operation of a target terminal, a signal measuring device (which may be referred to as a 'position measuring device', a 'position measuring device', etc.), a positioning server, a base station, and a mobile communication network described in these specifications are disclosed in the present disclosure. Substantially the same or partially modified may be applied to the target terminal, signal measurer, location measurement server, base station, and mobile communication network of .

In the present invention, in measuring the location of the target terminal using the embodiment of FIG. 2, it is necessary to establish a call between the target terminal and the serving base station. At this time, it is necessary to efficiently set the uplink between the target terminal used in the positioning system and the serving base station according to the requirements of the desired positioning service. Such uplink configuration may include determining a communication method and frequency band. In this case, the communication method may be one of various systems such as GSM, W-CDMA, LTE, and 5G used in the mobile communication system. In addition, the type of channel used as the uplink channel may be set differently. In addition, it can be set by changing the frequency or period of the uplink signal transmitted on the same channel, the bandwidth of the signal, and the transmission power.

According to an example, requirements for uplink-based positioning in a positioning-based service provided for a target terminal may be set in various ways. For example, when positioning for a target terminal is performed, the purpose and priority of positioning may be different. For example, while positioning of a target terminal can be used for emergency rescue, it can also be used for navigation. Also, the moving speed of the target terminal may be different. That is, it may be an environment in which it moves at high speed, moves at low speed, or is stationary. In addition, accuracy and reliability required for measuring the location of the target terminal may vary.

In uplink signal-based positioning, it is necessary to deliver the various requirements described above to the mobile communication network. In delivering these various requirements, embodiments in which the requirements are notified to the mobile communication system are presented. In the present invention, when performing uplink-based positioning, call setup is requested to the target terminal and the mobile communication network. QCI (Quality Class Identifier), Priority, etc. used as call setting parameters can be set differently and delivered to the mobile communication network. For example, QCI 91 can be used as positioning for uplink. In addition, the requirements of various services can be specified by different priorities. As another example, it is possible to reflect various requirements for positioning by setting QCI 91 to uplink signal-based positioning for emergency rescue and 92 to uplink signal-based positioning for general commercial use and setting different priorities.

According to an embodiment, call setup parameters may be differently set as follows.

QCI 91 Uplink Positioning for Emergency Rescue

Priority 1: Very Urgent Rescue Situations

Priority 2: General Situation

QCI 92 Commercial Uplink Positioning

Priority 1: positioning for high-speed terminals

Priority 2: Positioning for low-speed terminals

Priority 3: Positioning for stopped terminals

Alternatively, other requirements of the location service may be set using parameters such as delay, BER, or GBR / non-GBR. For example, if the BER is 10 ^-2 , positioning accuracy of 10 m level error, 10 ^-3 , positioning accuracy of 1 m error level, and 10 ^-4 level of positioning accuracy of 10 cm error level can be specified. In addition, it is also possible to define the information of the error level by including the priority, and transmit it in the service request. Different from the above, other parameters such as delay may be used, or a new standard may be created and the above purpose, speed of the target terminal, desired error level, etc. may be requested when setting up a call.

Uplink-based precision positioning requests of the different requirements described above may be requested to the mobile communication network. The mobile communication network, which has grasped the approximate location of the target terminal with respect to the parameters, checks the frequency band and communication methods available for service in the area, and determines the system that can best satisfy the service requirements in the frequency band and communication system. . According to an example, this process may be performed by an Evolved Packet Core (EPC) of the network. In addition, the EPC that has received the request condition establishes a call to the target terminal. In this case, the EPC transfers parameters for the received requirements to the base station (eg, eNB). In the above, the EPC of the network has been described as a premise, but this is an example and is not limited thereto. Any core network entity capable of performing the above operations on a communication network is not limited to its type or name and can be applied to the present invention.

Thereafter, the base station receiving the parameters for the requirements establishes a call or allocates uplink resources to the target terminal. At this time, the type of channel to be allocated to the target terminal may be set differently according to the requirements of the uplink-based positioning. In addition, the transmission frequency or period of the uplink channel allocated for positioning may be set differently according to the requirements of the moving speed or reliability of the target terminal. That is, as the moving speed of the target terminal increases, the transmission frequency of the uplink channel allocated for positioning can be increased. In addition, the higher the required accuracy or reliability of positioning, the higher the bandwidth of the uplink channel allocated to the target terminal for positioning can be set. In addition, when positioning is required in a wider area or high reliability of positioning is required, the bandwidth, transmission power or transmission frequency of the uplink channel allocated to the target terminal may be set high. In addition, as a method of increasing the transmission power, a parameter related to the transmission power of the target terminal may be changed so that the target terminal transmits with higher power when transmitting a specific channel.

In this way, the base station of the mobile communication system receives information corresponding to requirements for uplink-based positioning of the target terminal, and performs differential allocation of uplink resources in consideration of the positioning requirements. In this process, the base station of the mobile communication system changes and allocates parameters such as the type of channel to be allocated to the target terminal, transmission frequency, bandwidth to be allocated, and transmission power in consideration of the positioning requirements.

According to an embodiment, the scheduler of the base station may discriminately allocate resources to the target terminal according to the priority of the positioning based on the uplink signal. For example, resource allocation is preferentially performed for a target terminal having a high priority, and resource allocation is performed with a lower priority for a target terminal having a lower priority. As an example of priority resource allocation, when resources are allocated to a terminal with a higher priority than a target terminal with a lower priority, some resources are not allocated to a target terminal with a lower priority if there are no other resources, or , Resources of other terminals that previously provide uplink data can be reduced, and uplink resources can be allocated to high-priority terminals for positioning. Resource allocation according to another priority may allocate resources so that the target terminal transmits a signal with a higher frequency, a wider bandwidth, or a higher transmission power to a terminal with a higher priority.

As an embodiment of resource allocation at a higher frequency, different frequencies of uplink resource allocation are set at the first frequency and the second frequency, and resource allocation of the first frequency is given priority to a terminal with a higher priority level. It is to transmit a signal at the second frequency to a terminal with a low . Here, resource allocation may be performed such that the first frequency becomes a higher frequency than the second frequency. One of the methods for performing this in detail is to set the resource allocation period corresponding to the first frequency to be smaller than the resource allocation period of the second frequency.

In addition, when a terminal applies for an uplink-based positioning service, information on mobility or movement speed can be transmitted together so that resource allocation can be performed in consideration of this. At this time, information on mobility may be transmitted to the mobile communication network through a QCI requesting it. According to the request, the base station of the mobile communication network may perform resource allocation to a terminal with high mobility at a higher frequency compared to a terminal with low mobility.

In addition, when a terminal applies for an uplink-based positioning service, it can transmit information on accuracy requirements or reliability of positioning together, so that resource allocation is performed in consideration of this. At this time, the terminal may transmit information on the accuracy or reliability of the positioning to the mobile communication network through a QCI requesting it. According to the request, the base station of the mobile communication network allocates resources to the terminal requiring high accuracy or reliability at a high frequency compared to other terminals.

In the present invention, the call establishment request described above may be initiated by various devices. First of all, it is possible to transmit from the target terminal. When the target terminal activates the location service or determines that uplink-based positioning is necessary while a certain location service is in progress, it is possible to request uplink resource allocation for positioning to the mobile communication network. To this end, the target terminal checks whether an area where uplink-based positioning is possible and performs call setup or uplink resource allocation for positioning in an area where uplink-based positioning is possible.

That is, the target terminal recognizes or determines whether an uplink-based positioning is required and transmits it to a telecommunications network or a positioning server. To this end, the target terminal may obtain in advance information on a position where uplink-based positioning is possible. If it is located at a position where uplink-based positioning is possible and precise positioning is required, the target terminal can detect this and make a positioning request based on an uplink signal to a positioning server or mobile communication system. Alternatively, the target terminal may secure the locations of the signal measurers in advance. The target terminal secures its approximate location based on information such as GNSS, WiFi, and base station downlink signals. The target terminal determines whether to start or end positioning based on an uplink signal when a predetermined condition is satisfied based on the position of the secured signal measurer and the position of the target terminal. The determined positioning start or end request is transmitted to the positioning server or mobile communication system. The location measurement server receiving the request may inform the signal measurer of the start and end of the location measurement. In addition, the base station of the telecommunications network receiving the request of the target terminal may perform predetermined uplink resource allocation for positioning and notify the signal measurer of the resource allocation information. Based on the resource allocation information, the signal measurer detects and measures the uplink signal of the target terminal. In the above process, the request of the target terminal may be transmitted to the mobile communication network through one or more servers.

According to an embodiment, the target terminal may determine whether it is an uplink-based positioning area using an uplink signal. In this case, the target terminal secures information on a region where uplink signal-based positioning (hereinafter, also referred to as 'uplink-based positioning') is possible through a map or database, and then determines whether it has entered the region. . In addition, the target terminal can also determine whether it has entered the service range of a specific mobile communication base station. In this case, the target terminal can know that it is an area where uplink signal-based positioning is possible through a broadcasting message from the base station. Alternatively, the target terminal may determine whether it has entered the service range of the base station by securing identification information of a base station capable of positioning based on uplink in advance in a database.

According to another embodiment, determining whether or not to perform uplink-based positioning for the target terminal in an external server that secures location information of the target terminal or the location of the signal measurer, and performing the uplink-based positioning If the condition is satisfied, a call setup request or an uplink resource allocation request may be transmitted to the mobile communication network. One example is navigation. While navigation is in progress, the target terminal transmits its location-related information to an external server. A location measurement server or a navigation server may be used as the external server. The server that secures the location information of the target terminal can determine whether to measure the location based on an uplink signal. In a general situation, navigation using GPS is performed, and the server may transmit a call setup or uplink resource allocation request to a mobile communication network when a condition required for positioning based on an uplink signal is satisfied.

In general, positioning through GPS is most widely used. However, positioning through GPS rarely works indoors. Even outdoors, the accuracy is not high, so there are several places that indicate the limit of positioning accuracy. For example, it is a place such as an area with many high-rise buildings or an intersection of roads. It is possible to overcome the limitations of GPS-based positioning by installing several signal measuring devices in these places.

In a general case, navigation is performed while performing GPS-based positioning. At this time, positioning performance can be improved by combining WIFI-based positioning and downlink-based positioning of the base station. However, when the target terminal arrives near an area where positioning based on mobile communication uplink is required, it is determined whether or not there is a condition for positioning based on the uplink signal of the target terminal. The determination may be performed by a server that calculates the location of the terminal or secures location information. As an example of the condition, an area for uplink-based positioning may be set in advance, and whether the target terminal is located in the area may be determined through conventional positioning including GPS. Alternatively, it may be determined through a measurement value of a downlink signal of WIFI or a base station. This can be transmitted to a server that the target terminal measures and determines. When the condition for positioning based on an uplink signal is satisfied, the server transmits an uplink call establishment request for positioning to the mobile communication network. When requesting the call setup, the request conditions reflecting information such as the speed of the target terminal and the required positioning accuracy are also transmitted. When receiving a call setup request for positioning, the mobile communication network performs uplink resource allocation in consideration of the parameters of the required condition, and transfers the resource allocation information to a positioning server or signal measuring device to proceed with positioning.

In addition, call setup for positioning or cancellation of uplink resource allocation can be performed in various ways. A first possible method is to end the call setup or uplink resource allocation for the positioning after a predetermined time elapses when initial call setup or resource allocation is performed. As another method, it may be determined that the server performing positioning or the target terminal is out of the uplink positioning area and request establishment of a positioning call or cancellation of uplink resource allocation.

In the above process, a certain area may be set as a condition for starting uplink signal-based positioning, and it may be determined whether or not the user enters the area. In addition, after setting a certain area, uplink signal-based positioning can be canceled when the user leaves the area.

As another method, positioning by an uplink signal may be initiated when the distance between the two devices is within a certain value by determining the location of the target terminal and the locations of the signal measurers. On the other hand, if it deviates beyond a certain value, the positioning may be terminated by canceling the uplink signal. In the above process, if there are several signal measurers for measuring signals of the target terminal, positioning may be started when a predetermined number of N1 signal measurers come within a certain distance. On the other hand, during uplink signal-based positioning, the distance between the signal measurers and the target terminal is calculated, and when the distance between the predetermined number N2 signal measurers is not within a certain distance, the uplink signal measurement is canceled. The number of N2 may be set differently according to the topography of the location to measure the location of the target terminal and the characteristics of the location to be located. For example, when determining whether or not it is within a certain distance from a location, N2 is set to 1, and when determining a location on a straight line, such as when measuring a location in a tunnel, N2 is set to 2 and the location on a plane is measured. In this case, it can be operated by setting N2 to 3 or more. That is, the numbers may be set differently according to the characteristics of the region to be positioned, and the characteristics of the region may reflect on what dimension the positioning to solve the problem determines the location.

Initiation and termination of positioning may be performed by obtaining the location of the target terminal from a server that measures the location of the target terminal and calculating the distance to the signal measurers. In the above process, various methods such as GPS, WIFI, positioning using measurement for mobile communication downlink may be used to measure the location of the target terminal. In addition, the location of the signal measurer can be obtained in advance. For example, in the case of a signal measurer at a fixed location, information about the location may be stored in a storage device in advance and read and used. On the other hand, in the case of a moving signal measurer, the value of the instantaneous position can be reported from the signal measurer and utilized. In this way, the location measurement server determines and informs the mobile communication network of the uplink signal-based location measurement for the target terminal to initiate or terminate it.

When the uplink-based location measurement is determined, the information is notified not only to the mobile communication network, but also to the signal measurer so that the signal measurer can measure the position of the target terminal. In the above process, the server may acquire resource allocation information after the uplink configuration for positioning is completed in the mobile communication network, and then notify one or more signal measurers including the uplink resource allocation information. As another method, an uplink setting may be performed in a mobile communication network requested for uplink-based location measurement, and this may be directly reported to a signal measurer. In the above process, uplink resource allocation information may be delivered to the signal measurer. As another method, predetermined resources may be allocated to the target terminal, and transmission of resource allocation information may be omitted or the amount of information to be transmitted may be reduced.

In the above process, it is possible to make the conditions for starting call setup or uplink resource allocation for positioning the same as conditions for canceling them. That is, an uplink positioning capable area may be defined, initiated when entering the area, and terminated when leaving the area. Another method is to set the start condition and the termination condition differently. The location measurement server may determine the initiation or termination of positioning based on an uplink signal, and notify the mobile communication network or the target terminal of this determination. In this process, the mobile communication network may allocate uplink predetermined resources to the target terminal for uplink-based positioning and notify the signal measurer of the resource allocation information. The information can be transmitted to a signal measurer via one or more servers in a mobile communication network. A location measurement server may be used as the server. Based on the resource allocation information, the signal measurer measures the uplink signal of the target terminal.

9 illustrates an embodiment in which the start condition 920 and the termination condition 910 are set differently. Referring to FIG. 9, it can be seen that conditions for starting and terminating uplink-based positioning are set differently. 9 illustrates a case in which an initiation condition is included in a termination condition. This is in consideration of the characteristic of signal detection, which generally requires higher reception power for initial acquisition. That is, it is relatively easy to continuously track a signal that has already been detected. However, it is also possible to design the initiation condition to be outside the termination condition. This is intended to enable preparation for uplink signal acquisition in advance.

When the mobile communication network receives a positioning end request based on an uplink signal, the mobile communication network may terminate a call to the target terminal or end resource allocation of an uplink signal set for positioning.

In the above description, a case in which a condition for starting or ending mobile communication uplink-based positioning is set to a certain location or region is taken as an example. However, in another embodiment, when the distance between the target terminal and the signal measurement period becomes a certain distance, uplink-based positioning may be performed or terminated. In addition, it is possible to operate more flexibly by setting different starting distances and ending distances. In one embodiment, the starting threshold distance may be set smaller than the ending threshold distance. Conversely, it is also possible to set the distance serving as the starting threshold value to be larger than the distance serving as the ending threshold value.

In one embodiment of the conditions for starting or canceling the distance-based uplink-based positioning, the location server of the target terminal secures information on the location of the signal measurer in advance and stores it in the memory device in advance. Alternatively, the location information of the signal measurer can be stored in an external server and then inquired at any time. Then, the location of the target terminal is secured by receiving location information or calculating the target terminal using measurement information. Based on the position of the target terminal and the position of one or more signal measurers, the distance between them is measured, and when the distance satisfies a certain condition, the positioning process can be started or ended.

In another embodiment, when the signal measurer moves, the location measurement server secures location information of one or more signal measurers. In addition, approximate location information of the target terminal is secured. The approximate location information of the target terminal may be calculated based on GPS information measured by the target terminal. Alternatively, it may be a location based on a WIFI or mobile communication downlink signal measured by the target terminal. The positioning server starts uplink-based positioning when the distance between the target terminal and the signal measuring period becomes less than a certain value. To this end, the positioning server may request transmission of an uplink signal for positioning to the mobile communication network. Upon receiving the request, the mobile communication network establishes uplink signal transmission for positioning of the target terminal and transmits the information to a positioning server or signal measurer. After this, the positioning server may calculate based on the uplink signal transmitted by the target terminal. The uplink-based positioning can be terminated when the distance between the signal measurer and the target terminal calculated based on the uplink signal reaches a value greater than or equal to a certain value. As another example, if the distance between the signal measurer and the target terminal calculated based on the uplink is less than a certain distance, the process may be terminated. As another embodiment, when the reception strength of the uplink signal of the target terminal measured by the signal measurer is greater than or equal to the first reception strength threshold or less than or equal to the second reception strength threshold, the process may be terminated. As another end condition, it is possible that the positioning server receives a request from a user carrying the signal measurer or determines an end condition of the signal measurer and ends the positioning server.

In the above process, it is possible to set a different distance depending on the position where the signal measurer or the target terminal is located. For example, in an environment with many obstacles, such as a plain or a river, the distance serving as the threshold value may be set small.

3 is a flowchart illustrating an operation of a positioning system according to an embodiment of the present disclosure. The following description will be made based on the positioning system disclosed in FIG. 2 .

Referring to FIG. 3 , in the positioning system, conventional positioning using GPS, WiFi, etc. may be performed (S110). Even while the corresponding positioning is being performed, whether positioning using the uplink signal can be performed or whether the condition for using the corresponding positioning is satisfied can be checked continuously or at regular intervals or when a predetermined request is made (S120). . If the uplink signal-based positioning condition is not satisfied (S120, No), GPS-based conventional positioning continues. If the condition for performing uplink-based positioning is satisfied (S120, Yes), the uplink-based positioning request is transmitted to the mobile communication network.

Upon receiving the uplink-based positioning request, the mobile communication network may determine a communication method and frequency band to be used for positioning, and perform call setup and uplink resource allocation for positioning (S130). Positioning of the target terminal is performed based on the uplink signal transmitted using the uplink resource for positioning set as described above (S140). Even while uplink-based positioning is in progress, it may be determined whether a communication method or frequency needs to be changed continuously or at regular intervals or when there is a predetermined request (S150).

If the condition for changing the communication method or frequency is satisfied (S150, Yes), the mobile communication network may change the communication method or frequency band (S160). However, in this case, the communication method or frequency is changed in consideration of service requirements for uplink positioning. In this way, when the communication method or frequency band is changed, the mobile communication network informs the location measurement server or the signal measurer of the change, so that positioning using the changed communication method or frequency band can be continuously performed. In the above-described process, a case in which a communication method or frequency needs to be changed may occur in various situations. For example, handover may be performed due to movement of the target terminal, or the same communication method or frequency band may no longer be used. As another example, when a communication method or frequency band in which a target terminal can perform positioning with higher quality is moved to a service area, the communication method or frequency band may be changed to improve positioning quality.

While positioning using an uplink signal is performed, a condition for canceling uplink positioning may be checked continuously or at regular intervals or when there is a predetermined request (S170). When the condition for canceling positioning using uplink is satisfied (S170, Yes), a call cancellation or termination of resource allocation for positioning may be requested to the mobile communication network (S180). In this case, the previous GPS-based positioning may be continued.

In the above process, the implementation and protocol may vary depending on the entity that initiates and terminates positioning using uplink of the target terminal. Since positioning is possible with various service models, the present invention presents a schematic structure of the protocol for various scenarios.

4 illustrates an embodiment of a signal flow when a target terminal requests uplink-based positioning. The target terminal acquires the location of the signal measurer or information on an area where uplink-based positioning is possible. For example, information on available regions in advance can be secured from an external server. Alternatively, the mobile communication base station may transmit the information. If the target terminal roughly grasps the positional information and determines the need to more accurately determine its own position, it requests the mobile communication network to set up a signal for positioning through signaling (S210). In addition, the target terminal may proceed with a positioning request to the positioning server.

In this case, the target terminal may transmit uplink resource allocation information to the base station and transmit the information to the positioning server or the target terminal. As another example, the mobile communication network receiving the uplink positioning request may transmit the information to a positioning server or a signal measurer. 4 shows the latter case.

Upon receiving the uplink-based positioning request, the mobile communication network transmits uplink-based positioning request-related information to the positioning server and the signal measurer (S220). The location measurement server transmits the above information to the signal measurer again (S230). Then, the mobile communication network performs resource allocation of an uplink signal for positioning to the target terminal and allocates it to the target terminal (S250). The mobile communication network transmits (S240) the resource allocation information to a positioning server or a signal measurer to enable uplink signal-based positioning. The resource allocation information may be transmitted from the location measurement server to the signal measurer (S260). The target terminal may transmit an uplink signal to the mobile communication network using the allocated resources (S270). The above-described positioning may be performed by measuring such an uplink signal in a signal measurer of a positioning system.

5 illustrates a case in which a positioning server requests a call establishment for positioning to a mobile communication network. In this case, according to an example, a positioning request may be made to a location measurement server from another external server. As another example, the target terminal may transmit a positioning request to the positioning server. As another example, the positioning server may start uplink-based positioning at the request of a signal measurer or a person possessing the signal measurer. The positioning server of FIG. 5 functions to perform positioning by receiving such an external uplink-based positioning request, transmitting it to the mobile communication network, and receiving a response or resource allocation information from the mobile communication network. In addition, the location measurement server may calculate the location of the target terminal based on the uplink measurement result transmitted by the target terminal. However, it should be noted that the main function of the positioning server in the present invention is to determine uplink-based positioning, make a request for it, and receive resource allocation information for a target terminal.

The location measurement server of FIG. 5 determines the approximate location of the target terminal. In addition, information on the place where the signal measuring device is installed or information on the area where positioning based on the mobile communication uplink signal is possible is secured. Based on the above information, if it is determined that the target terminal approaches within a certain distance from the signal measurer or enters a positioning possible area, the positioning server may determine uplink signal-based positioning. In addition, the location measurement server may determine the location of the target terminal by an external input.

When the positioning server determines uplink signal-based positioning for the target terminal, it requests uplink setting for positioning to the mobile communication network (S310). In addition, the positioning server transmits uplink-based positioning request-related information to the signal measurer again (S320). The mobile communication network transmits the information to the target terminal again (S330).

When the mobile communication network performs resource allocation of the uplink signal for positioning to the target terminal (S350) and transmits it to the positioning server (S340), the positioning server determines the resource allocation information used for setting the uplink signal or whether it is set or not. The information may be obtained and reported to the signal measurer (S360). In addition, the positioning server transmits a positioning request for the target terminal to one or more signal measurers. The positioning server may deliver uplink resource allocation allocated to the target terminal to the signal measurer to the signal measurer. The target terminal may transmit an uplink signal or the like to the mobile communication network using the allocated resources (S370). The above-described positioning may be performed by measuring such an uplink signal in a signal measurer of a positioning system.

6 shows another embodiment of the present invention. The present invention schematically illustrates a process in which a telecommunications system receives and processes a positioning request for a target terminal from the outside. Referring to FIG. 6 , a mobile communication network receives a positioning request for a target terminal from the outside. Alternatively, the mobile communication network may determine the location of the target terminal. For example, if a base station to which the target terminal is connected satisfies a predetermined condition, it may be determined to start positioning in the base station or the core network. For example, it is possible to receive measurement information about a neighboring cell from a terminal, determine an approximate location of a target terminal based on this, and determine based on this. Alternatively, when entering a specific cell, uplink signal-based positioning may be determined.

When the mobile communication uplink signal-based positioning is determined, the mobile communication network transfers the positioning information to the target terminal, the location measurement server, and the signal measurer (S410, S420, S430). In addition, the mobile communication network allocates uplink resources for positioning to the target terminal (S450). After performing the resource allocation to the target terminal, the mobile communication network transmits the information to the positioning server or signal measurer (S440). The resource allocation information may be transmitted from the location measurement server to the signal measurer (S460). The target terminal may transmit an uplink signal to the mobile communication network using the allocated resources (S470). The above-described positioning may be performed by measuring such an uplink signal in a signal measurer of a positioning system. The resource allocation information may include one or more information among frequency, time, code, channel type, and transmission power used for uplink communication.

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

In order for the signal measurer to detect and measure the uplink signal of the target terminal, it needs to acquire signal configuration and resource allocation information of the uplink signal. As an example of the above process, the signal measurer may receive terminal identification information, analyze a downlink signal transmitted by a base station based on this, and obtain resource allocation information and signal configuration information transmitted to a target terminal. The RNTI of the target terminal may be used as the identification information. As another embodiment, the base station of the mobile communication network informs the signal measurer of uplink signal configuration and resource allocation information of the target terminal. In another embodiment, a specific signal setting and resource are promised in advance between a base station of a mobile communication network and a signal measurer, and the base station sets uplink signal transmission of the target terminal according to the promise, and determines whether the target terminal transmits the signal. Only whether or not it can be reported to the signal meter. It is to be noted that the concepts proposed in the present invention can be applied to a wide range of technologies for measuring the location of a target terminal regardless of the above methods.

7 is a diagram showing the configuration of a signal measurer according to an embodiment of the present disclosure. Referring to FIG. 7, the signal measurer of the present invention includes one or more downlink signal receivers 710 and one or more uplink signal receivers 720 to receive mobile communication signals. In addition, the signal measurer includes a control unit 730 for controlling the received signal. Optionally, the signal measurer includes a communication unit 740 capable of communicating with a base station or a location measurement server or other signal measurers, a GPS receiver 770 performing synchronization with absolute time, and an input unit 750 receiving an input from a user. , a display unit 760 displaying information processed by the controller 730 may be included.

Here, the downlink signal receiver 710 and the uplink signal receiver 720 may be an LTE downlink signal receiver and an LTE uplink signal receiver. In the present invention, the downlink signal receiving unit may operate by setting the frequency band in which the target terminal transmits the uplink signal to a frequency band in which control information is transmitted. Although the present invention has been described based on the LTE system, it should be noted that it can be easily applied to other wireless communication systems. That is, if the communication system in which the call of the target terminal is established is GSM or W--CDMA, the downlink receiver 710 and the uplink receiver 720 are implemented as receivers of the GSM or W-CDMA system, respectively.

The LTE downlink signal receiver acquires an initial LTE downlink signal, obtains system time synchronization, and acquires a base station ID and system information. In addition, by measuring the 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 and the like are received through the downlink receiver and system information is obtained.

The LTE uplink signal receiving unit 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 signal measurer must acquire configuration and resource allocation information for the uplink signal transmitted by the target terminal. In one embodiment of the present invention, the signal measurer obtains the identification information of the target terminal, receives the downlink signal transmitted by the base station using the downlink signal receiver 710 based on this, analyzes it, and determines the uplink signal of the target terminal. Signal setting and resource allocation information may be obtained. In the above process, the base station of the mobile communication network may notify the signal measurer of the identification information of the target terminal after receiving a positioning request for the target terminal. In addition, after notifying the communication server of the above information, the communication server may notify the signal measurer.

In addition, in another embodiment of the present invention, uplink setting and resource allocation information of a target terminal may be received from a communication server through the communication unit 740, and a location measurement server may be used as the communication server. In another implementation example, a signal of a target terminal may be set to be transmitted between a mobile communication network and a signal measurer at a predefined resource and time, and the resource allocation information and setting information may be used. The control unit 730 obtains 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 measurer of the present invention secures an absolute time standard, and can calculate the difference in time when the uplink signal of the target terminal is received by each signal measurer. In the embodiment of FIG. 7, the signal measurers secure temporal synchronization based on the GPS signal received from the GPS receiver 770 so that they can play such a role. In this process, not only GPS but also other technologies such as SBAS and Galileo used for positioning or time information can be used or combined with GPS.

However, the present invention may use other methods capable of securing mutual time synchronization between different types of signal measurers or distinguishing the difference in arrival time. For example, it can be applied if a high-precision clock is used and the synchronization of the signal measurement period can be adjusted in advance or if the relative difference can be calculated. In addition, the measurement of time may be performed based on a time difference between a time point at which a specific signal of the LTE downlink signal reception unit is received and a time point at which another user's uplink signal is received. Information about the reception time is transmitted to the positioning server.

In the present invention, a separate communication unit 740 may be used when communication with a location measurement server or direct communication with other signal measuring devices is required. The communication unit 740 may use a different band from the band for measuring the signal of the target terminal. This is to prevent the communication device from interfering with an uplink signal transmitted by the target terminal.

The signal measurer of FIG. 7 includes an output device such as a display to display the location of the target terminal to the user. In addition, an input unit 750 for user input is provided. Through the input unit 750, the user can input additional information, such as manually inputting information on the current signal measuring device, to increase the accuracy of position measurement. there is. Also, a searcher may input a positioning request for a target terminal through the input unit 750 .

The control unit 730 of FIG. 7 controls the operation of the aforementioned signal measurer. The control unit 730 is connected to each device and serves to control information reception, measurement, communication, input/output, etc. described in this specification.

8 is a diagram showing the configuration of a signal measurer according to another embodiment of the present disclosure. The difference from the configuration of the signal measuring device in FIG. 7 is that communication with other external equipment (location measuring server or other signal measuring device), display, and input device functions are connected to a terminal 850 such as an external smartphone or tablet. It is realized by reducing the number of parts of the signal measuring device of the present invention.

The signal measurer 800 of FIG. 8 includes a downlink signal receiver 810, an uplink signal receiver 820, a controller 830, and a GPS receiver 840, and has a communication function with other equipment, a display function, and an input function. Functions and the like are implemented by connecting to a terminal 850 such as a commercial tablet or smart phone. The part indicated in the dotted rectangle of FIG. 8 is the implementation of a new type of signal measurer. The connection between the control unit 830 and the terminal 850 of FIG. 8 may be connected using a wired connection such as USB, but a wired connection such as Wi-Fi may also be used.

The present invention proposes a system in which, in a positioning system for measuring the position of a target terminal, the target terminal transmits signals of different types depending on the environment, and the positioning server calculates the position using different algorithms. In addition, it is proposed to set the master's signal measuring device to give different control functions to the general signal measuring device.

10 is a diagram illustrating a configuration of a base station 1000 according to an embodiment of the present disclosure. The above-described embodiments of the present disclosure may be substantially equally applied to the base station illustrated in FIG. 10 .

Referring to FIG. 10, the base station includes a downlink signal transmitter 1010 and an uplink signal receiver 1020. The downlink signal transmitter 1010 functions to transmit signals to terminals. In addition, the uplink signal receiver 1020 functions to receive uplink signals transmitted by terminals.

In addition, the base station of the mobile communication network includes a communication unit 1040 for transmitting RNTI information or channel setting and resource allocation information of the target terminal to the signal measurer. The base station informs the signal measurer of the state of the target terminal. In addition, cell ID information of a base station that has formed a link with the target terminal and cell ID information of a base station that maintains adjacent time synchronization may be transmitted. The communication unit 1040 may directly transmit the information to the signal measurer. As another method, the information may be transmitted to another communication server by the target terminal so that the communication server transmits the information to the signal measurer. At this time, the role of the communication server may be implemented so that the positioning server performs.

In addition, the base station can communicate using a downlink transmitter and an uplink receiver without separately having a communication unit 1040 for transmitting identification information of the target terminal, channel setting and resource allocation information, and cell ID related information of the base station. is to inform In addition, the control unit 1030 uses the downlink signal transmission unit 1010 and the uplink signal reception unit 1020 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 1020 is properly received.

11 is a diagram showing the configuration of a location measurement server according to an embodiment of the present disclosure. The above-described embodiments of the present disclosure may be substantially equally applied to the positioning server disclosed in FIG. 11 .

The location measurement server 1100 may include a communication unit 1110 and a control unit 1120. The communication unit 1110 has a communication function with a mobile communication network and a communication function with a signal measurer. The communication function with the mobile communication network receives identification information of the target terminal or uplink channel setting and resource allocation information.

Also, the communication unit 1110 receives state information of the target terminal, cell ID information of a base station that forms a link with the target terminal, and cell ID information of a base station that maintains time synchronization with the target terminal. In addition, when a location measurement request of a specific target terminal is transmitted to the location measurement server, a link establishment request for the target terminal is transmitted to the mobile communication network. The location measurement request may be requested by a signal measuring device or an emergency rescue center, or may be requested through an input device connected to a location measurement server.

The controller 1120 performs positioning based on an uplink signal transmitted from the target terminal to the base station based on location information of the target terminal based on at least one of GNSS (Global Navigation Satellite System), WiFi, and downlink transmission of the base station. It can be determined whether the condition is satisfied. If it is determined that the positioning condition based on the uplink signal is satisfied, the controller 1120 may transmit the uplink-based positioning request to a mobile communication network or at least one signal measurer performing uplink-based positioning through the communication unit.

According to an example, the positioning condition based on the uplink signal may be set to a case where the target terminal approaches within a predetermined distance based on the position of at least one signal measurer.

Alternatively, according to an example, the positioning condition based on the uplink signal may be set to a case where the target terminal enters an uplink-based positioning area in which uplink-based positioning can be performed.

Alternatively, according to an example, the positioning condition based on the uplink signal may be set to a case where an uplink-based positioning request for the target terminal is received through the communication unit.

The control unit 1120 may receive uplink resource information allocated to the target terminal from the base station through the communication unit according to the uplink-based positioning request. In this case, the control unit 1120 may transmit uplink resource information to at least one signal measurer through the communication unit.

12 is a diagram illustrating the configuration of an uplink-based positioning system according to an embodiment of the present disclosure. The above-described embodiments of the present disclosure may be substantially equally applied to each of the components disclosed in FIG. 12 .

The mobile communication network 1210 may include a base station 1220 and a core network entity 1230. When the base station 1220 receives an uplink-based positioning request for the target terminal 1240, the base station 1220 allocates uplink resources to the target terminal, which is a location measurement target, but requires conditions for a positioning-based service provided to the target terminal. Based on this, it is possible to determine resources to be allocated for positioning of the target terminal and allocate the determined resources to the target terminal. When the core network entity 1230 receives an uplink-based positioning request for the target terminal 1240, the frequency band and You can decide how to communicate.

According to an example, the requirements for the positioning-based service may include at least one of a purpose and priority for using location information, a moving speed of a target terminal, and accuracy and reliability of location information.

According to an example, a requirement for a positioning based service may be indicated to a mobile communication network according to a standard determined in correspondence to a value of a call setup parameter used for call setup.

The core network entity 1230 provides at least one frequency band and communication method based on location information of a target terminal based on at least one of GNSS (Global Navigation Satellite System), Wi-Fi, or downlink transmission of a base station It is possible to check and determine a frequency band and a communication method according to a requirement of a positioning based service from among at least one frequency band and communication method.

The core network entity 1230 may change at least one of a frequency band and a communication method when a predetermined change condition is satisfied while performing uplink-based positioning using allocated uplink resources.

When allocating uplink resources, the base station 1220 may determine at least one of a type, bandwidth, transmission power, or transmission frequency of an uplink channel based on a requirement for a positioning based service.

When there are a plurality of target terminals, the base station 1220 may determine at least one of priority or reliability, type of uplink channel, bandwidth, transmission power, or transmission frequency based on a requirement for a positioning-based service.

13 is a diagram illustrating a configuration of a terminal 1300 according to an embodiment of the present disclosure. The above-described embodiments of the present disclosure may be substantially equally applied to the terminal illustrated in FIG. 13 .

The target terminal, which is the target of positioning, acquires location information based on at least one of the communication unit 1310 and Global Navigation Satellite System (GNSS), Wi-Fi, or downlink transmission of a base station, and positioning based on an uplink signal When it is determined that the condition is satisfied, a control unit 1320 for transmitting an uplink-based positioning request to at least one of a mobile communication network and a location measurement server through the communication unit may be included.

According to an example, a positioning condition based on an uplink signal may be set to a case where a terminal approaches within a predetermined distance based on a position of at least one signal measurer performing uplink-based positioning.

Alternatively, according to an example, the positioning condition based on the uplink signal may be set to a case where the terminal enters an uplink-based positioning area in which uplink-based positioning can be performed.

According to this, a mobile communication uplink signal transmission setting method and apparatus for location measurement of a terminal that can satisfy the conditions required by each application by efficiently setting uplink for various applications requiring location measurement of a target terminal is provided. can be provided.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. In addition, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but rather to explain the scope of the technical idea of the present invention by these embodiments are not limited. In addition, the embodiments disclosed in the present invention may be implemented independently or may be implemented in combination with each other. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

CROSS-REFERENCE TO RELATED APPLICATIONCROSS-REFERENCE TO RELATED APPLICATION

This patent application is filed in Korea on December 21, 2021 Patent Application No. 10-2021-0184103 and Patent Application No. 10-2022-0181125 filed in Korea on December 21, 2022 US Patent Act 119 Priority is claimed under subsection (a) (35 U.S.C §119(a)), the entire contents of which are hereby incorporated by reference into this patent application. In addition, this patent application claims priority for countries other than the United States for the same reason as above, and all the contents are incorporated into this patent application by reference.

Claims

communications department; and

When an uplink-based positioning request for a target terminal is received, uplink resource allocation is performed for the target terminal, which is a location measurement target, based on the requirements of the positioning-based service provided to the target terminal. a controller for determining resources to be allocated for positioning of a terminal and allocating the determined resources to the target terminal;

A base station including a.
According to claim 1,

The requirements for the positioning-based service are:

A base station characterized in that it includes at least one of a purpose and priority for using location information, a moving speed of the target terminal, and accuracy and reliability of location information.
According to claim 1,

The requirements for the positioning-based service are:

Characterized in that the base station is directed to the base station according to a standard determined corresponding to a value of a call setting parameter used for call setting.
According to claim 1,

The control unit,

When allocating uplink resources, the base station, characterized in that for determining at least one of the type, bandwidth, transmission power or transmission frequency of the uplink channel based on the requirements of the positioning-based service.
According to claim 4,

The control unit,

and determining at least one of a type, bandwidth, transmission power, or transmission frequency of a priority or reliability uplink channel based on a requirement of the positioning-based service when the number of target terminals is plural.
communications department; and

Based on the location information of the target terminal based on at least one of GNSS (Global Navigation Satellite System), WiFi, or downlink transmission of the base station, whether a positioning condition based on an uplink signal transmitted from the target terminal to the base station is satisfied a control unit that determines and transmits an uplink-based positioning request to a mobile communication network or at least one signal measurer performing uplink-based positioning through the communication unit when it is determined that the positioning condition based on the uplink signal is satisfied;

Location measurement server including a.
According to claim 6,

The positioning condition based on the uplink signal is,

The location measurement server, characterized in that the case where the target terminal approaches within a predetermined distance based on the position of the at least one signal measurer.
According to claim 6,

The positioning condition based on the uplink signal is,

Wherein the target terminal enters an uplink-based positioning area in which uplink-based positioning can be performed.
According to claim 6,

The positioning condition based on the uplink signal is,

The location measurement server, characterized in that the case where an uplink-based positioning request for the target terminal is received through the communication unit.
According to claim 6,

The control unit,

and receiving uplink resource information allocated to the target terminal from a base station through the communication unit according to the uplink-based positioning request.
According to claim 10,

The control unit,

and transmitting the uplink resource information to the at least one signal measurer through the communication unit.
communications department; and

Acquire location information based on at least one of GNSS (Global Navigation Satellite System), Wi-Fi, or downlink transmission of a base station, and send an uplink-based positioning request when it is determined that a positioning condition based on an uplink signal is satisfied a control unit transmitting through the communication unit to at least one of a mobile communication network or a location measurement server;

A terminal comprising a.
According to claim 12,

The positioning condition based on the uplink signal is,

The terminal characterized in that the terminal approaches within a predetermined distance based on the position of at least one signal measurer for performing uplink-based positioning.
According to claim 12,

The positioning condition based on the uplink signal is,

The terminal characterized in that the terminal enters an uplink-based positioning area in which uplink-based positioning can be performed.