Method and device for controlling positioning according to terminal movement in wireless communication system

Abstract

Provided are a method and apparatus for providing a location information service with reduced power consumption in a cellular wireless communication system (5G System). [Solution] A method according to the present invention is a method for measuring a position of a terminal of a mobile communication system, and includes the steps of receiving terminal positioning execution information including a surrounding target area and a terminal positioning method from a location management function (LMF) device of the mobile communication system, receiving system information from a base station of the mobile communication system, identifying the received terminal positioning execution information and whether the terminal is included in the surrounding target area, determining the received terminal positioning method if the terminal is located within the surrounding target area, performing positioning for the terminal using the determined positioning method, and transmitting the positioning result to the LMF.

Description

[Technical field]

[0001] The present invention relates to a wireless communication system, and more particularly to a method and apparatus for providing location information services in a cellular wireless communication system (5G System). [Background technology]

[0002] In order to meet the increasing demand for wireless data traffic since the commercialization of the 4G communication system, efforts are being made to develop improved 5G or pre-5G communication systems. For this reason, 5G or pre-5G communication systems are referred to as Beyond 4G Network or Post-LTE systems.

[0003] To achieve high data transmission rates, 5G communication systems are being considered for implementation in ultra-high frequency (mmWave) bands (e.g., 60 GHz bands). To mitigate path loss and increase transmission distances in ultra-high frequency bands, beam-forming, massive MIMO (Multiple-Input Multiple-Output), FD-MIMO (Full Dimensional MIMO), array antennas, analog beam-forming, and large scale antenna technologies are being discussed for 5G communication systems.

[0004] Furthermore, to improve the system network, technological developments are being made in the 5G communication system, such as advanced small cells, cloud radio access networks (cloud RAN), ultra-dense networks, device-to-device communication, wireless backhaul, moving networks, cooperative communication, CoMP (Coordinated Multi-Points), and receive interference cancellation.

[0005] In addition, advanced coding modulation (ACM) methods such as FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding) and advanced connection technologies such as FBMC (Filter Bank Multi Carrier), NOMA (non orthogonal multiple access), and SCMA (sparse code multiple access) are being developed for the 5G system.

[0006] Meanwhile, 3GPP (registered trademark), which is responsible for cellular mobile communication standards, is currently standardizing a new core network structure called 5GCore (5GC) in order to evolve from the existing 4G LTE system to the 5G system.

[0007] 5GC supports the following differentiated features for the Evolved Packet Core (EPC), the existing network core for 4G:

[0008] First, 5GC will introduce the network slice function. As a requirement for 5G, 5GC must support a variety of terminal types and services. For example, there are enhanced Mobile Broadband (eMBB), ultra reliable low latency communications (URLLC), and massive machine type communications (mMTC). Each of these terminals / services has different requirements for the core network. For example, eMBB services require high data rates, while URLLC services require high security and low latency. The network slice approach is a technology proposed to meet such diverse service requirements.

[0009] Network Slice is a method of creating multiple logical networks by virtualizing one physical network, and each Network Slice Instance (NSI) can have different characteristics. Therefore, by having a network function (NF) that matches each NSI's characteristics, various service requirements can be met. By assigning an NSI that matches the characteristics of the service required for each terminal, many 5G services can be supported efficiently.

[0010] Second, 5GC can facilitate support for the network virtualization paradigm through the separation of mobility management and session management functions. In the existing 4G LTE, all terminals were provided with services in the network through signaling exchange with a single core device called the Mobility Management Entity (MME), which is responsible for registration, authentication, mobility management, and session management functions. However, in 5G, the number of terminals is exploding, and the mobility and traffic / session characteristics that must be supported depending on the type of terminal are subdivided. If all functions are supported by a single device such as the MME, the scalability of adding entities for each required function will be poor. Therefore, various functions are being developed based on a structure that separates the mobility management function and the session management function to improve scalability in terms of the function / implementation complexity of the core equipment responsible for the control side and the signaling load. Summary of the Invention [Problem to be solved by the invention]

[0011] The present invention relates to a method and device for controlling a high-precision positioning system according to terminal movement. In the 3GPP system, a terminal always recognizes its cell or tracking area-based location in the 3GPP system through a modem that receives a signal broadcast by a mobile communication base station. However, among high-precision positioning technologies, indoor positioning technology can provide high-precision positioning technology only in an area where a positioning node supporting the positioning technology is installed, for example, a subway or a specific building. Alternatively, among high-precision positioning technologies, outdoor positioning technology can provide its positioning technology only in a specific area. For example, a technology using network RTK (Real Time Kinematic) can realize high-precision positioning technology only in an area where a reference station (for example, a base station) is installed and information is provided from the installed base station. While such high-precision positioning technology can measure the location of a terminal to a finer unit, the terminal consumes more power due to the use of high-precision positioning. Therefore, when high-precision positioning technology can be used only within a specific region, a method is needed to control the operation of the high-precision positioning system function of the terminal based on location information within the 3GPP system and reduce the power consumption of the terminal. [Means for solving the problem]

[0012] According to one aspect of the present invention, a method for measuring a position of a terminal in a mobile communication system includes the steps of receiving terminal positioning execution information including a surrounding target area and a terminal positioning method from a location management function (LMF) device of the mobile communication system, receiving system information from a base station of the mobile communication system, and receiving the received terminal positioning execution information including a surrounding target area and a terminal positioning method from a location management function (LMF) device of the mobile communication system. The terminal The method includes a step of identifying whether the terminal is included in the peripheral target area based on positioning execution information and the system information, a step of determining a positioning method based on the received terminal positioning execution information if the terminal is located within the peripheral target area, a step of performing positioning on the terminal using the determined positioning method, and a step of transmitting a result of the positioning to the LMF.

[0013] According to one aspect of the present invention, there is provided a terminal device for measuring a position in a mobile communication system, the terminal device including: a memory for storing terminal positioning execution information and system information; a communication unit for communicating with a base station of the mobile communication system; a positioning unit for measuring a position of the terminal; and a processor, the processor comprising:

[0014] receiving the terminal positioning execution information including a surrounding target area and a terminal positioning method from a location management function (LMF) device of the mobile communication system; receiving the system information from the base station of the mobile communication system; The terminal Identifying whether the terminal is included in the peripheral target area based on the positioning execution information and the system information, and if the terminal is located within the peripheral target area, The above The present invention is characterized in that a positioning method is determined based on terminal positioning execution information, the terminal is positioned using the determined positioning method, and the result of the positioning is transmitted to the LMF.

[0015] The present invention Other The method according to the aspect is a method for a location management function (LMF) device to control a positioning of a terminal in a mobile communication system, comprising: move receiving a position determination request message for the terminal from a mobility management function (AMF) of a communication system, the position determination request message including surrounding target area and positioning level information; The above The method includes a step of determining a positioning method to be performed by the terminal based on a position determination request message, a step of transmitting terminal positioning execution information including information of the determined positioning method to the terminal, a step of receiving a response message from the terminal, and a step of transmitting the response message received from the terminal via the AMF.

[0016] According to another aspect of the present invention, there is provided a location management function (LMF) device for controlling the positioning of a terminal in a mobile communication system, the device including: a memory for storing positioning-related information of the terminal; a communication unit for communicating with the terminal via a base station of the mobile communication system and communicating with other network function devices of the mobile communication system; and a processor, the processor comprising:

[0017] The above move receiving a positioning request message for the terminal from a mobility management function (AMF) of a communication system, the positioning request message including a surrounding target area and positioning level information; determining a positioning method to be performed by the terminal based on the received positioning request message; transmitting terminal positioning execution information including information of the determined positioning method to the terminal; and receiving a response message from the terminal. ,before The present invention is characterized in that the AMF is controlled to transmit a response message received from the terminal. Effect of the Invention

[0018] According to the present invention, in an environment where high-precision location information services are provided only in specific regions, the power consumption used in the high-precision location information system can be reduced by operating the location information system only when a terminal is located within a specific region in the 3GPP system. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 illustrates a network architecture supporting location services for a 5G system according to the present invention. [Diagram 2] A diagram illustrating a RAN-based location information service providing structure. [Diagram 3] This is a diagram illustrating a structure in which both LMC and LMF exist within a single serving carrier. [Figure 4] FIG. 1 is an exemplary diagram illustrating a surrounding target area and a 5G positioning service area according to the present invention. [Figure 5a] 2 is a signal flowchart of a system for explaining a terminal position-based high precision positioning control method according to a first embodiment of the present invention. [Figure 5b] 2 is a signal flowchart of a system for explaining a terminal position-based high precision positioning control method according to a first embodiment of the present invention. [Figure 6a] 2 is a signal flow chart for transmitting high-precision terminal positioning execution information to a terminal via an LMC according to a second embodiment of the present invention.

[25] [Figure 6b] 11 is a signal flowchart for transmitting high precision terminal positioning execution information to a terminal via an LMC according to a second embodiment of the present invention. [Figure 7a] 13 is a signal flowchart illustrating a case where high precision terminal positioning execution information is transmitted to a terminal via an LMF according to a third embodiment of the present invention. [Figure 7b] 13 is a signal flowchart illustrating a case where high precision terminal positioning execution information is transmitted to a terminal via an LMF according to a third embodiment of the present invention. [Figure 8] 13 is an exemplary diagram illustrating an operation performed by a terminal after the terminal receives high precision positioning terminal execution information including a surrounding target area according to a fourth embodiment of the present invention. FIG. [Figure 9] 13 is a signal flowchart illustrating a registration area-based high precision positioning control method according to a fifth embodiment of the present invention. [Figure 10] 13 is a signal flowchart for controlling high precision positioning after setting a region of interest based on a network according to a sixth embodiment of the present invention. [Figure 11] 13 is a signal flowchart when a terminal performs a positioning procedure using a Location Reporting Control message according to a seventh embodiment of the present invention. [Figure 12a] 1A to 1C are diagrams illustrating various methods for indicating the location of a terminal according to the present invention. [Figure 12b] 1A to 1C are diagrams illustrating various methods for indicating the location of a terminal according to the present invention. [Figure 12c] 1A to 1C are diagrams illustrating various methods for indicating the location of a terminal according to the present invention. [Figure 13] 1 is a block diagram of each device constituting a 3GPP network according to the present invention. [Figure 14] FIG. 2 is a block diagram of a terminal according to the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In addition, when it is determined that a detailed description of a related known function or configuration in the description of the present invention makes the gist of the present invention unclear, the detailed description will be omitted. In addition, the terms used below are defined in consideration of the functions of the present invention, and may vary depending on the intention or practice of a user or operator. Therefore, the definitions should be based on the entire contents of this specification. Hereinafter, a base station is a subject that performs resource allocation for a terminal, and may be at least one of eNode B, Node B, BS (Base Station), RAN (Radio Access Network), AN (Access Network), RAN node, radio access unit, base station controller, or node on a network. A terminal includes UE (User Equipment), MS (Mobile Station), cellular phone, smartphone, computer, or multimedia system performing a communication function. In the present invention, downlink (DL) refers to a radio transmission path of a signal transmitted from a base station to a terminal, and uplink (UL) refers to a radio transmission path of a signal transmitted from a terminal to a base station. In addition, although the embodiment of the present invention will be described below using a 5G system as an example, other communication systems having a similar technical background or channel form, such as LTE or LTE-A systems, may also be applied to the embodiment of the present invention. It will be obvious to those skilled in the art that the present invention can also be applied to other systems having a similar technical background or channel form. The embodiment of the present invention may also be applied to other communication systems through partial modifications within the scope of the present invention as determined by a person skilled in the art.

[0021] FIG. 1 is a diagram illustrating a network architecture supporting location services for a 5G system according to the present invention.

[0022] Figure 1 illustrates the network structure (or network architecture) of a 5G system as well as the interfaces between each network entity.

[0023] Referring to FIG. 1, the network structure of the 5G system includes a user equipment (UE) 101, a base station (Radio Access Network, (R)AN) 200, a User Plane Function (UPF) device (not shown in FIG. 1), a Data Network (DN) (not shown in FIG. 1), an Authentication Server Function (AUSF) device (not shown in FIG. 1), an Access and Mobility management Function (AMF) device 301, a Session Management Function (SMF) device (not shown in FIG. 1), a Network Slice Selection Function (NSSF) device (not shown in FIG. 1), a Network Exposure Function (NEF) device 305, a Network Repository Function (NRF) device (not shown in FIG. 1), a Policy Control Function (PCF) device (not shown in FIG. 1), a Unified Data Management (UDM) device 302, an Application Function (AFM) device 303, and an Application Repository (ARF) device 304. The location service functions include a Gateway Mobile Location Centre (GMLC) device 310, a Location Management Function (LMF) device 303, and a Location Service client (LCS or LCS client) 306.

[0024] Each function or functional device illustrated in FIG. 1 may be one network node. One network node may be physically and / or logically independent. In another example, one network node may be physically and / or logically composed of two or more nodes. Also, each network function may be embodied in a specific device. In another example, each network function may be embodied in a form in which a device and software are combined. In another example, each network function may be embodied as software in a device on a specific collective network. Hereinafter, each network function will be referred to as "functional device" or as network function. In the following description, each network function will be understood to be the same as a network function device.

[0025] In one embodiment of the present invention, UE 101 refers to a terminal. AMF 301 is a network function that manages the mobility of the terminal 101. SMF (not shown in FIG. 1) is a network function device that manages a packet data network connection provided to the terminal 101. This connection is called a PDU (protocol data unit) session. PCF (not shown in FIG. 1) is a network function that applies a service policy, a charging policy, and a policy for a PDU session of a mobile communication operator to the terminal 101. UDM 302 is an abbreviation for Unified Data Management device, and is a network function device that stores and manages information for subscribers. The NEF 305 can access information for managing a terminal in a 5G network, and is connected to a specific NF (Network Function) 307 device of a 5G core network, such as subscribing to a mobility management event of the terminal, subscribing to a session management event of the terminal, requesting session-related information, setting charging information of the terminal, and requesting a change in a PDU session policy of the terminal, and serves to transmit information on the terminal 101 to the NF 307 device or to report information on the terminal 101 to the outside. The 5G-RAN 200 means a base station connected to the terminal 101 via wireless communication technology. In FIG. 1, it is illustrated as NG-RAN 200. The UPF (not shown in FIG. 1) is an abbreviation for a User Plane Function device, and serves as a gateway for transmitting packets transmitted and received by the terminal 101. The UPF is connected to a data network (DN) and serves to transmit data packets generated in the 5G system to an external data network. For example, it is connected to a data network connected to the Internet, and routes data packets sent by terminals to the Internet.

[0026] On the other hand, the 5G system can provide high-precision, low-latency location services.

[0027] In FIG. 1, the LMF 303 may be a network function device responsible for the overall management of resources required to provide location information of the 5G-registered terminal 101. The LMF 303 is responsible for calculating the location information of the terminal 101 or for finally confirming the location of the terminal 101 and reporting it to the GMLC 310.

[0028] The LMF 303 receives a location information request for a target terminal from the AMF 301 via the Nlmf interface. The LMF 303 exchanges location information required for a UE-based positioning method or a UE assisted positioning method, and such a protocol is called LPP (LTE Positioning Protocol). The protocol called LPP in the present invention is a protocol used for a UE-based positioning method or a UE assisted positioning method between a terminal and a location information positioning server (LMF 303 or LMC (not shown in FIG. 1) in the present invention). The LPP protocol is not necessarily limited to LTE, but is also used in NR. The LMF 303 determines a positioning result on a geographical coordinate described in technical document TS23.032. The positioning result determined by the LMF 303 may include the speed of the terminal. The LMF 303 also performs the following functions.

[0029] (1) Providing a location information service in response to a terminal location information request from the serving AMF 301 to the target terminal 101.

[0030] (2) Providing location information services in response to requests from the serving AMF 301 to the target terminal 101, either periodically or triggered according to the terminal location.

[0031] (3) A positioning method is determined according to the terminal 101 and the presence or absence of capability of the carrier network, the service quality, and the LCS client type.

[0032] (4) Report terminal positioning information for the destination terminal 101 to the GMLC 310 periodically or triggered according to the terminal's location.

[0033] (5) Cancel periodic or terminal location triggered terminal location information reporting to the target terminal 101.

[0034] (6) The LMF 303 provides assistance data for providing location information that is broadcast to the terminal 101 via the NG-RAN 200.

[0035] In FIG. 1, the GMLC 310 provides a function required to provide a location service. One operator may have one or more GMLCs 310. One GMLC 310 may be the first node through which an external LCS client accesses the operator network. The NF 307 in the 5G Core network that accesses the AF 307 and the GMLC 310 may access the GMLC 310 directly or through the NEF 305. The GMLC 310 requests routing information and personal information of the target terminal 101 from the UDM 302 through the Nudm interface. After checking the authority of the external LCS client 306 and the AF 307 and verifying the personal information of the target terminal 101, the GMLC 310 forwards the location information request to the serving AMF 301 through the Namf interface. If the terminal 101 is roaming, the GMLC 310 forwards the location information request to the PLMN of another operator network. The personal information setting of the terminal 101 may be checked.

[0036] Before transmitting the location location result of the target terminal 101, the personal information setting of the terminal 101 must be confirmed, and the personal information setting confirmation must always be performed in the home operator network of the terminal 101. A Visited GMLC (V-GMLC) (reference numeral 312 in FIGS. 5a and 5b to 7a and 7b) can be a GMLC present in the serving operator network of the target terminal 101.

[0037] The Home HGMLC (reference numeral 311 in FIGS. 5a and 5b to 7a and 7b) is a home operator of the destination terminal 101. network The GMLC present in the GPLC 102 plays a role in verifying personal information of the destination terminal 101.

[0038] FIG. 2 illustrates an example of a RAN-based location information service providing architecture according to an embodiment of the present invention.

[0039] Figure 2 shows a different network configuration from Figure 1, which provides location information services in a 5G system.

[0040] In FIG. 1, the LMF 303 that measures location information has a configuration that is connected to the 5G core network via an interface with the AMF 301, while in FIG. 2, a Location Management Component (LMC) 230 measures the location information of the terminal 101, and the LMC 230 is located in the RAN 200. The LMC 230 in FIG. 2 performs the function provided by the LMF 303 described in FIG. 1. However, the LMC 230 exists in the NG-RAN 200, and the LMC 230 is connected to the gNB or ng-gNB (210, 220) via the L-IF. In FIG. 2, the UE 101, the GMLC 310, the UDM 302, the LCS client 306, the AF 307, and the NEF 305 perform functions similar to those described in FIG. 1. However, when the GMLC 310 receives a location information request, the GMLC 310 transmits the location information request to the AMF 301, and the AMF 301 transmits the location information request to the NG-RAN 200 via the N2 reference point. The gNB (or ng-gNB) 210 transmits the received location information request to the LMC 230 via the L-IF.

[0041] The LMC 230 is a network function in charge of the overall management of resources required to provide location information of the terminal 101. The LMC 230 is responsible for calculating the location information of the terminal 101 or for finally confirming the location of the terminal 101 and reporting it to the GMLC 310.

[0042] The LMC 230 receives a location information request for the target terminal 101 transmitted from the AMF 301 to the NG-RAN 200 via the N2 reference point. When the LMC 230 exists in the NG-RAN 200 as a separate NF 307 as shown in FIG. 2, the LMC 230 is connected to the gNB 210 via an L-IF interface. The gNB 210 transmits the location information request received from the AMF 301 via the N2 reference to the LMC 230. The LMC 230 receives the location information request forwarded from the AMF 301 via the gNB 210. The LMC 230 functions within the gNB or ng-gNB, and in this case, the L-IF exists within the gNB or ng-gNB and does not appear externally.

[0043] The LMC 230 exchanges location information required for a UE-based positioning method or a UE assisted positioning method, and such a protocol is called LPP. The protocol called LPP in the present invention is a protocol used for a UE-based positioning method or a UE assisted positioning method between the terminal 101 and a location information positioning server (LMF 303 or LMC 230 in the present invention). The LPP protocol is not necessarily limited to LTE, but can also be used in NR. The LMF 303 determines the positioning result on the geographical coordinates described in technical document TS 23.032. The positioning result determined by the LMC 230 includes the speed of the terminal. In addition, the LMC 230 performs the following functions.

[0044] (1) The serving AMF 301 receives a location information service in response to a terminal location information request for the destination terminal 101. Such a location information request is received through the gNB via the L-IF.

[0045] (2) Receive a location information request from the serving AMF 301 for a request that is triggered periodically or according to the terminal location for the target terminal 101. Such a location information request is received through the gNB via the L-IF.

[0046] (3) A positioning method is determined according to the terminal 101 and the presence or absence of capability of the carrier network, the service quality, and the LCS client type.

[0047] (4) Report terminal positioning information for the destination terminal 101 to the GMLC 310 periodically or triggered according to the terminal's location.

[0048] (5) Cancel periodic or terminal location triggered terminal location information reporting to the target terminal 101.

[0049] (6) The LMC 230 provides assistance data for providing location information that is broadcast to the terminal 101 via the NG-RAN 200.

[0050] FIG. 3 illustrates a structure in which both the LMC and the LMF exist within one serving carrier according to various embodiments of the present invention.

[0051] The description of the individual network functions is the same as the functions described in Figures 1 and 2. In the structure illustrated in Figure 3, the AMF 301 recognizes whether the LMC 230 and the LMF 303 coexist, and when receiving a location information request, determines whether to use the location information service of the LMC 230 or the location information service of the LMF 303, taking into consideration the presence or absence of protocols and functions provided by the terminal 101, the precision level and positioning method provided by the LMC 230 and the LMF 303, and the location information request service quality, service type and service identifier, location information service identifier, location information response time, required precision of location information, etc. included in the location information request message.

[0052] FIG. 4 is an exemplary diagram illustrating a surrounding target area and a 5G positioning service area according to the present invention.

[0053] Referring to Fig. 4, there are illustrated a surrounding target area 410 among a plurality of cells, a 5G positioning service area, and a 5G enhanced positioning service area 420. Fig. 4 is merely an example of each area and does not define the areas described in the present invention, and the description of each area will be described below.

[0054] (1) 5G positioning service area

[0055] The 5G positioning service area is an area where a positioning service is provided through network equipment and positioning technology located in an area where a 5G service is provided. For example, it may be an area where a carrier's nationwide 5G network service is provided, or an area where a Global Navigation Satellite System (GNSS) positioning service is provided. Such a service area may include both an indoor positioning service area and an outdoor positioning service area. In FIG. 4, all areas shown as hexagons are cell-based positioning service areas where 5G network services are provided. That is, it includes all cells shown as hexagons. In FIG. 4, the hexagonal areas are areas where the location of a mobile terminal can be identified, which can be distinguished by a cell or a tracking area of ​​the 3GPP system.

[0056] (2) 5G improved positioning service area 420:

[0057] The 5G enhanced positioning service area 420 is a part of the 5G positioning service area and is included in the 5G positioning service area. The 5G enhanced positioning service area 420 is provided by additional equipment in addition to equipment for providing 5G network services, or is provided by applying a specific positioning technology required to improve the positioning service. Examples of such a 5G enhanced positioning service area 420 include factories, dense urban areas, roads or railroads, and tunnels, and include both indoor and outdoor environments. In FIG. 4, the 5G enhanced positioning service area 420 is represented by a hexahedron 420. In practice, the 5G enhanced positioning area 420 is an area including the target cell 400.

[0058] (3) Surrounding Target Area 410:

[0059] The peripheral target area 410 is an area including a 5G enhanced positioning area 420, and is the smallest area including the 5G enhanced positioning area 420 in which location tracking is possible using a low power positioning method such as a cell-based positioning method in the 5G system. Therefore, it includes neighboring cells (401, 402, 403, 404, 405, 406) of the 5G enhanced positioning area 420. This area includes a 5G enhanced positioning area (5G Enhanced Positioning Area 420) in which a high precision positioning method is available. If a high precision positioning method is required in the 5G enhanced positioning area 420, the 5G system activates the high precision positioning system when the target terminal 101 is in the peripheral target area 410. The peripheral target area 410 is mapped to an area of ​​interest (Area Of Interest) divided into a cell list, a tracking area, an NG-RAN node identifier list, or the like.

[0060] Among the geographical area descriptions, the Universal Geographic Area Description (GAD) is a method for describing a geographical area. The geographical area description method describes patterns and speeds.

[0061] In the present invention, the pattern of the geographical location expression method is expressed in at least one or more of the following methods.

[0062] 1) Ellipsoid Point

[0063] 2) Ellipsoid with uncertainty circle

[0064] 3) Ellipsoid with uncertainty ellipse

[0065] 4) Polygon

[0066] 5) Ellipsoid with altitude

[0067] 6) Ellipsoid with points and altitude, and uncertain ellipsoid with altitude

[0068] 7) Ellipsoid Arc

[0069] 8) High Accuracy Ellipsoid Point with Uncertainty Ellipse

[0070] 9) High Accuracy Ellipsoid point with altitude and uncertainty ellipsoid

[0071] 12a-12c are diagrams illustrating various methods for indicating a position according to the present invention.

[0072] The ellipsoid point 1201 in Figure 12a may be a representation used in the World Geodetic System 1984 (WGS84) standard system used in the Global Positioning System (GPS). The ellipsoid point 1201 is a representation of the location of a point on the surface of the Earth ellipsoid 1200, including latitude 1210 and longitude 1220.

[0073] Next, Fig. 12b shows an ellipse with altitude, which further includes information on altitude (1230, 1231, 1240, 1241) along with the position of point 1201 on the ellipsoid 1200 described above. For example, when a point is located in a lower direction 1231 from a specific reference point on the ground or water surface, the coordinates indicate a position having a negative 1230 value. Conversely, when a point is located in a higher direction 1241 from a specific reference point on the ground or water surface, the coordinates indicate a position having a positive 1240 value.

[0074] FIG. 12c illustrates an ellipse with uncertainty.

[0075] FIG. 12c represents the angle (A) 1251 from the north direction, the semi-major axis (r1) 1252, and the semi-minor axis (r2) 1253. FIG. 12c is also used with the points in the two position representation schemes above.

[0076] The velocity in the geographical position representation method expresses horizontal velocity and vertical velocity. Horizontal velocity is expressed by the direction of the target and the magnitude of the velocity, and vertical velocity is expressed by the direction of the target and the magnitude of the velocity.

[0077] First Embodiment

[0078] 5a and 5b are signal flow charts of a system for explaining a method for controlling high precision positioning based on a terminal position according to a first embodiment of the present invention.

[0079] In the following description, the signal flows of Figures 5a and 5b are continuous, that is, the signal flow of Figure 5b proceeds continuously after the signal flow of Figure 5a.

[0080] 5a, in step 500, the AF 307 or the LCS client 306 transmits a location-based service request to the H-GMLC 311. The location-based service request message includes at least one or more of the following information:

[0081] (1) Target terminal identifier: Terminal identifier or terminal group identifier requesting location information

[0082] (2) Requester Identifier: An identifier to identify the requesting LCS Client or AF.

[0083] (3) Request Transaction Classifier: Classifier for location information requests

[0084] (4) Information on location information service quality (Location QoS): Information indicating the quality of service for a location information request. This information includes location precision and service response time information. It may also include the type of location information service or a classifier of the location information service. The location information quality information may be a location service quality index corresponding to the location information precision and service response time. The location service quality index is pre-stored in the H-GMLC 311 itself. Alternatively, the location service quality index is received from an NF 307 outside the H-GMLC 311, for example, UDM 302 or PCF (not shown in Figures 5a and 5b). The location service quality index is exemplified as shown in Table 1 below.

[0085] [Table 1]

[0086] Location information service information: The location information service type and the location information service classifier may be pre-configured in the AMF 301. The location information service type and the location information service classifier may also be received from a device stored in the UDM 302 or the PCF (not shown in FIG. 1), which is an NF 307 outside the AMF 301. The AMF 301 extracts the location information service quality information mapped to the location information service type and the location information service classifier configured in the AMF 301. The location information service type is used to determine a positioning method to be used to determine the location of the terminal 101 in the AMF 301 or the LMC 230.

[0087] High-precision positioning request information: An indicator that explicitly indicates a request for high-precision positioning. The high-precision positioning request information includes at least one or more of the following information:

[0088] (1) High-precision positioning request indicator: An indicator that explicitly shows whether or not a high-precision positioning request is required.

[0089] (2) High-precision positioning method: An indicator that explicitly indicates the high-precision positioning method, and the relevant information includes information such as the high-precision GNSS (e.g., Real Time Kinematic) positioning method, or the Wi-Fi (registered trademark) or BT positioning method, or the positioning method utilizing UWB.

[0090] (3) High-precision positioning support type: refers to a positioning support type that is divided into an indoor positioning method and an outdoor positioning method. The indoor positioning method refers to a type used for indoor positioning, such as a beacon method, a Wi-Fi (registered trademark) method, a sound method, a magnetic method, a camera method, a UWB method, and an RFID method. The outdoor positioning method refers to a type used for outdoor positioning, such as a GNSS method, an A-GNSS method, and an RTK method.

[0091] (4) 5G improved positioning service area: An area where high-precision positioning services are provided. This may be the area described in FIG. 4. Information indicating such an area is as follows:

[0092] 1) 5G improved positioning service area index: an index indicating a 5G improved positioning service area.

[0093] 2) 5G improved positioning service area identification address: 5G improved positioning service area provides information such as specific address, building name, subway station name, building dong / number.

[0094] 3) GAD information for 5G improved positioning service: Includes information expressed as a list of coordinates indicating a polygon indicating an area with specific coordinates displayed in latitude and longitude like GPS coordinates or a list of coordinates.

[0095] 4) 5G improved positioning service area characteristic information: Includes characteristic information of the area in which the service is provided. The characteristic information indicates the type of place where people gather, such as buildings, outdoor sports stadiums, indoor sports stadiums, concert venues, subways, department stores, hotels, and squares.

[0096] In step 502, the H-GMLC 311 checks the subscription information with the UDM 302 to see if it can provide the location information of the target terminal 101 included in the location information request.

[0097] In step 504, the H-GMLC 311 recognizes the information on the AMF 301 serving the terminal 101 identifier included in the location information request, so it requests the UDM 302 and receives the identifier of the AMF 301 serving the target terminal 101.

[0098] In step 506, if the terminal 101 is roaming, the H-GMLC 311 transmits to the V-GMLC 312 a location information request, information including the identifier of the target terminal 101 and the identifier of the AMF 301. The V-GMLC 312 receives the target area (or 5G improved positioning service area information) included in the location information request. The V-GMLC 312 changes the received 5G improved positioning service area information to the mapped surrounding target area information.

[0099] The peripheral target area information may be preset for a target area provided by the high-precision positioning service provided by the H-GMLC 311. Alternatively, it may be dynamically specified from information included in the received request message. When dynamically specified from the location information request, the peripheral target area is dynamically extracted through the following procedure.

[0100] 1) The target area expressed in various ways is converted into a polygon or polyhedron composed of ellipsoidal points of a GAD shape (for example, expressed as a hexahedron in FIG. 4).

[0101] 2) Select the unit for area designation: cell-based, base station-based or traffic area-based.

[0102] 3) A minimum area including a polygon or polyhedron is determined in advance according to the unit of the determined area. The area determined in this manner is called a surrounding target area setting area (for example, the surrounding target area shown in FIG. 4).

[0103] The surrounding target area information includes a cell list, a TA list, an area of ​​interest, a presence reporting area, etc. The V-GMLC 312 transmits to the AMF 301 an indicator indicating that the surrounding target area information is a 5G improved service area.

[0104] In step 508, the V-GMLC 312 transmits to the AMF 301 the information contained in the location information request message received by the V-GMLC 312 from the AMF 301, including the surrounding target area mapped by the V-GMLC 312. In the present invention, in the case of roaming, the V-GMLC 312 and the H-GMLC 311 respectively refer to the Visited GMLC 312 in the Visited operator network and the Home GLMC 311 in the Home operator network. In the case of non-roaming, the H-GMLC 311 and the V-GMLC 312 are the same network entity.

[0105] In step 510, if the terminal 101 is in an idle state, the AMF 301 performs a network-triggered service request procedure.

[0106] In step 512, the AMF 301 checks the location of the current terminal 101 in the 3GPP system and identifies (checks) whether the surrounding target area 410 is included in the registration area of ​​the current terminal 101. If so (if the surrounding target area 410 is included), the AMF 301 transmits high-precision terminal positioning execution information to the terminal 101. The high-precision terminal positioning execution information includes at least one or more of the following information:

[0107] (1) High-precision peripheral target area: V-GMLC31 2The peripheral target area information includes the intersection area of ​​the peripheral target area and the registered area of ​​the terminal 101 .

[0108] (2) High-precision positioning method index: Includes indexes indicating Assited GNSS or Assisted GNSS with RTK (Real Time Kinematic), UWB, 3GPP cell-based OTDOA, Wi-Fi (registered trademark) Index, BT, etc., which provide high-precision positioning.

[0109] (3) High-precision positioning support environment information: indoor positioning or indoor positioning

[0110] (4) High-precision positioning type: relative positioning or absolute positioning, including 2D information or 3D positioning information including the distance of the target terminal 101 from the ground.

[0111] (5) High-precision positioning level: A value expressing high-precision positioning as a level is transmitted. For example, the high-precision positioning level is illustrated in Table 2 below.

[0112] [Table 2]

[0113] In step 512, the NAS message sent by the AMF 301 to the terminal 101 may be additionally delivered to the NAS Location Notification Invoke Request 512a-1, or may be delivered by being included in a UE Configuration Update request message as in 512b-1.

[0114] In step 512a-1 or 512b-1, the terminal 101 to which the high precision positioning information is transmitted determines whether or not it can perform positioning using the requested high precision positioning information. If the terminal 101 interprets the requested information and is able to perform the requested positioning, the terminal 101 transmits a response indicating that it can perform positioning in response to the request. The terminal 101 transmits information indicating the status of the positioning method currently in operation and the positioning method being used in the response message. If the terminal 101 interprets the requested information and is unable to perform the requested positioning, the terminal 101 transmits a result indicating that the requested positioning cannot be performed and a reason for failure to perform positioning. The reason for failure to perform positioning includes at least one or more of the following contents:

[0115] (1) The required positioning method cannot be provided. The device is not equipped with the functionality to provide the required positioning method.

[0116] (2) No positioning function capable of meeting the required level of accuracy

[0117] (3) The user does not agree to the required positioning method or accuracy (user refusal)

[0118] (4) Positioning methods that cannot meet the required accuracy are rejected based on user preferences and settings.

[0119] (5) A positioning method that meets the required accuracy does not have signal coverage.

[0120] (6) The high-precision positioning method cannot be used because the terminal 101 is in low-power mode.

[0121] (7) No claimed 5G-improved areas found

[0122] (8) Error in allocating resources to utilize requested positioning technology

[0123] The AMF 301 receives a response from the terminal 101, and in the case of a successful response, the AMF 301 stores the positioning status information and high precision positioning information transmitted together with the response message in the AMF 301 in step 515. Alternatively, the AMF 301 transmits the positioning status information of the terminal 101 to the UDM 302 and stores it in the context of the terminal 101. The stored positioning status information can be transmitted to the newly connected AMF 301 when the terminal 101 later moves from the current AMF 301 and a context of the terminal 101 is requested from the newly connected AMF 301. Alternatively, after the RRC with the terminal 101 is released and moves to an IDLE state, the state stored during the NAS connection restoration procedure is restored, and if the location information state of the terminal 101 does not match the location information state of the AMF 301, the AMF 301 performs procedure 512 to transmit the state and high precision positioning information stored in the terminal context to the terminal 101 again.

[0124] In steps 516-1 and 516-2, the AMF 301 transfers the response message received from the terminal 101 to the H-GMLC 311 via the V-GMLC 312. The H-GMLC 311 further transfers the response message to the LC that requested the location information service. S The NEF 305 then communicates the response to the location information to the client 306 or the NEF 305 (not shown in FIGS. 5a and 5b), which in turn communicates the response to the location information to the AF 307 (not shown in FIGS. 5a and 5b).

[0125] In the present embodiment, a description has been given of a case where a location information request is made from the AF 307 or the LCS client 306. However, a location information request may be transmitted from the terminal 101 or the RAN 200.

[0126] If a location information request is requested from the terminal 101 or RAN 200, the location information request is transmitted to AMF 301. In this case, AMF 301 receives the location information request received by H-GMLC 311 from the terminal 101 or RAN 200 in step 500. AMF 301 receives the location information request described in step 500 from the terminal 101 or RAN 200 and performs the same procedure as V-GMLC 312 performed in step 508. For example, it changes the 5G improved location information included in the information request to a high precision surrounding information request. Thereafter, the operation of AMF 301 performs the procedures from step 510 onwards.

[0127] <Second embodiment>

[0128] 6a and 6b are signal flow diagrams for transmitting high precision terminal positioning execution information to a terminal via an LMC according to a second embodiment of the present invention.

[0129] The signal flows of Figures 6a and 6b are continuous as described with reference to Figures 5a and 5b, that is, the signal flow of Figure 6b proceeds continuously after the signal flow of Figure 6a.

[0130] 6a, steps 600 to 610 are the same as steps 500 to 512 described in the first embodiment, and therefore a description of the same parts will be omitted.

[0131] In step 612 of FIG. 6b, the AMF 301 selects an LMC 230 capable of providing a corresponding high-precision positioning based on the location information request and the surrounding target area information received from the (V-)GMLC 312. The AMF 301 checks whether there is an LMC 230 already assigned to the target terminal 101 of the location information request. If there is an LMC 230 already assigned to the target terminal 101, the AMF 301 determines whether the LMC 230 assigned to the target terminal 101 can satisfy the service quality included in the location information request received in step 618. If the AMF 301 determines that the assigned LMC 230 can provide a high-precision location information service that satisfies the requested service quality, the AMF 301 transmits the location information service request via the RAN 200 to the already assigned LMC 230. If the AMF 301 determines that the LMC 230 assigned to the target terminal 101 cannot satisfy the requested location information service quality, the AMF 301 reallocates an LMC for the target terminal 101 and transmits the received location information request information and surrounding target area information via the RAN in the newly assigned LMC in step 612c-1. When the AMF 301 newly assigns an LMC, it also transmits request information for the existing periodic location information service for the target terminal 101. The AMF 301 transmits the location information request, the surrounding target area, and high precision positioning terminal execution information to the LMC 230 together with the assigned or reallocated LMC identifier to the RAN 200.

[0132] In step 612c-2, when RAN200 receives a location information request, surrounding target area, and high precision positioning terminal execution information, and an LMC identifier from AMF301 to LMC230 in step 612c-1, the RAN node selects LMC230 via the LMC identifier and forwards the location information request, surrounding target area, and high precision positioning terminal execution information received from AMF301 to LMC230.

[0133] Alternatively, the RAN node 210 selects and transmits to the LMC 230 an appropriate LMC 230 via a location information request, surrounding target area, and high-precision positioning terminal execution information.

[0134] In step 612c-2, the LMC 230 determines a positioning method based on the location information request, the surrounding target area, and the high-precision positioning terminal execution information received from the RAN 200 or from the AMF 301 via the RAN 200, and transmits the high-precision positioning terminal execution information to the terminal 101. The LMC 230 determines the high-precision positioning terminal execution information based on the received location information request and the surrounding target area. The high-precision positioning terminal execution information has the same content as that described in step 512 described in the first embodiment.

[0135] In step 612c-2, the LMC 230 receives a response message to the high precision positioning terminal execution information from the terminal 101. The contents of the operation of the terminal 101 that receives the step 612c-2 are the same as the procedure that the terminal 101 performs upon receiving the message of the step 512a-1 / 512b-1 in the first embodiment. The response message is transmitted to the LMC 230 in step 612c-2. The response message received by the LMC 230 has the same result as the response message received by the AMF 301 in the step 512a-2 or step 512b-2 in the first embodiment.

[0136] In step 612c-3, LMC230 conveys the response to AMF301 via gNB210 of RAN200.

[0137] The steps after step 614 are the same as those after step 514 in the first embodiment, and therefore a description of the same parts will be omitted.

[0138] In the present embodiment, a description has been given of a case where a location information request is made from the AF 307 or the LCS client 306. However, a location information request may be transmitted from the terminal 101 or the RAN 200.

[0139] If a location information request is requested from the terminal 101 or RAN 200, the location information request is transmitted to AMF 301. In this case, AMF 301 receives the location information request received by H-GMLC 311 in step 600 from the terminal 101 or RAN 200. AMF 301 receives the location information request described in step 600 from the terminal 101 or RAN 200 and performs the same procedure as V-GMLC 312 performed in step 608. For example, it changes the 5G improved location information included in the information request to a high precision surrounding information request. Thereafter, the operation of AMF 301 performs the procedures from step 610 onwards.

[0140] <Third embodiment>

[0141] 7a and 7b are signal flow charts for explaining a case where high precision terminal positioning execution information is transmitted to a terminal via an LMF according to a third embodiment of the present invention.

[0142] The signal flows of Figures 7a and 7b are continuous as described with reference to Figures 5a and 5b, that is, the signal flow of Figure 7b proceeds continuously after the signal flow of Figure 7a.

[0143] First, steps 700 to 710 in Fig. 7a are the same as steps 500 to 510 in the first embodiment, so a duplicated description of the same parts will be omitted.

[0144] Next, in step 712 of FIG. 7b, the AMF 301 selects an LMF 303 that provides the corresponding high-precision positioning based on the location information request and the surrounding target area information received in the (V-)GMLC 312. The AMF 301 checks whether there is an LMF 303 already assigned to the target terminal 101 of the location information request. If there is an LMF 303 already assigned to the target terminal 101, the AMF 301 identifies (determines) whether the LMF 303 assigned to the target terminal 101 can satisfy the service quality included in the location information request received in step 708. If the AMF 301 identifies (determines) that the assigned LMF 303 can provide a high-precision location information service that satisfies the requested service quality, the AMF 301 transmits the location information service request to the already assigned LMF 303 via the RAN 200 or gNB 210. If the AMF 301 identifies (determines) that the LMF 303 assigned to the target terminal 101 cannot satisfy the requested location information service quality, the AMF 301 reallocates an LMF for the target terminal 101 and transmits the location information request information and surrounding target area information received in step 712d-1 to the newly assigned LMF 303. If the AMF 301 newly assigns an LMF, it also transmits request information for periodic location information service for the existing target terminal 101. The AMF 301 transmits the location information request, surrounding target area, and high precision positioning terminal execution information to the assigned or reallocated LMF to the LMF 303.

[0145] In step 712d-1, LMF303 receives a location information request, surrounding target area, and high precision positioning terminal execution information from AMF301.

[0146] In step 712d-2, the LMF 303 determines a positioning method based on the location information request, the surrounding target area, and the high-precision positioning terminal execution information received from the AMF 301, and transmits the high-precision positioning terminal execution information to the terminal 101. The LMF 303 determines the high-precision positioning terminal execution information from the received location information request and the surrounding target area. The high-precision positioning terminal execution information is the same as that described in step 512 of the first embodiment.

[0147] In step 712d-2, the LMF 303 receives a response message to the high precision positioning terminal execution information from the terminal 101. The contents of the operation of the terminal 101 that receives the high precision positioning terminal execution information from the LMF 303 in step 712d-2 are the same as the procedure that the terminal 101 performs upon receiving the message in step 512a-1 / 512b-1 in the first embodiment. The response message is transmitted to the LMF 303 in step 712d-2. The response message received by the LMF 303 receives the same result as the response message received by the AMF 301 in step 512a-2 or step 512b-2 in the first embodiment.

[0148] LMF303 transmits the response to AMF301 in step 712d-3.

[0149] The procedure after step 714 is the same as the procedure after step 514 in the first embodiment, and therefore the same description will be omitted.

[0150] In the present embodiment, a description has been given of a case where a location information request is made from the AF 307 or the LCS client 306. However, a location information request is transmitted from the terminal 101 or the RAN 200.

[0151] If a location information request is requested from the terminal 101 or RAN 200, the location information request is transmitted to AMF 301. In this case, AMF 301 receives the location information request received by H-GMLC 311 in step 700 from the terminal 101 or RAN 200. AMF 301 receives the location information request described in step 700 from the terminal 101 or RAN 200 and performs the same procedure as V-GMLC 312 performed in step 708. For example, it changes the 5G improved location information included in the information request to a high precision surrounding information request. Subsequent operations of AMF 301 perform the procedures from step 710 onwards.

[0152] <Fourth embodiment>

[0153] FIG. 8 is a diagram illustrating an example of an operation performed by a terminal after the terminal receives high precision positioning terminal execution information including a surrounding target area according to the fourth embodiment of the present invention.

[0154] The terminal 101 receives the surrounding target area 410 from the AMF 301, and when it detects entry into the area, it starts a terminal-based high precision positioning procedure and notifies the network of the exact location of the terminal 101. The terminal 101 receives the surrounding target area from the LMC 230 or the RAN node 210 in the RAN 200, or the LMF 303, as in the second and third embodiments.

[0155] When the terminal 101 enters the 5G enhanced positioning area 420, the LMC 230 or the LMF 303 performs a terminal positioning procedure to calculate the position of the terminal 101. The terminal position information is transmitted to the LCS Client 306 that requested it.

[0156] In step 800, the terminal 101 receives high-precision terminal positioning execution information from the AMF 301. The high-precision terminal positioning execution information received by the terminal 101 from the AMF 301 includes at least one of a surrounding target area and an index indicating a terminal positioning method or a terminal positioning accuracy and a service response. The terminal 101 receives the terminal positioning execution information from the AMF 301, from the LMC 230, or from the LMF 303.

[0157] In step 802, the terminal 101 stores high precision terminal positioning execution information received from the AMF 301, the LMC 230 or the LMF 303.

[0158] In step 804, the terminal 101 receives at least one or more of a cell identifier (Cell ID), a tracking area (TA), a PLMN, a non-public network (NPN) identifier (NPN-ID), and a closed access group identifier (Closed Access Group ID, CAG ID) from system information (System Information Block; SIB) that can determine the location of the terminal 101 within the 3GPP system received from the base station where the terminal 101 is camped.

[0159] In step 806, the terminal 101 compares the information for determining the current location of the terminal 101 from the location within 3GPP received via the system information (SIB) broadcast from the base station with the surrounding target area information included in the high-precision terminal positioning execution information received via step 800, and identifies (determines) whether the current location of the terminal 101 is included within the surrounding target area.

[0160] If it is identified (determined) that the terminal 101 is currently included in the surrounding target area, the positioning method to be performed by the terminal 101 is determined based on information included in the high precision terminal positioning execution information received in step 800. Examples of the high precision terminal positioning execution information received in step 800 include at least one of the following information:

[0161] (1) High-precision peripheral target area: The peripheral target area information or the intersection area of ​​the peripheral target area and the terminal's registration area.

[0162] (2) High-precision positioning method index: Includes indexes indicating Assisted GNSS or Assisted GNSS with RTK (Real Time Kinematic), UWB, 3GPP cell-based OTDOA, Wi-Fi (registered trademark) Index, BT, etc., which provide high-precision positioning.

[0163] (3) High-precision positioning support environment information: indoor positioning or indoor positioning

[0164] (4) High-precision positioning type: relative or absolute positioning. 2D information or 3D positioning information including the distance of the target terminal from the ground.

[0165] (5) High-precision positioning level: Transmits a value expressing high-precision positioning as a level. Table 2 is as shown in the example above.

[0166] (6) High-precision positioning period: The terminal includes an indicator for requesting periodic positioning and a positioning period.

[0167] The terminal 101 determines a positioning method to be performed by the terminal 101 or the terminal 101 and the network based on the high precision positioning type, the high precision positioning support environment information, the high precision positioning level, or the high precision positioning method index, and activates the determined positioning operation.

[0168] If the current location of the terminal 101 is not included in the peripheral target area, the terminal 101 suspends or does not activate the terminal positioning operation. If the terminal 101 is in the peripheral target area but leaves it, the terminal 101 also suspends or does not activate the terminal positioning operation.

[0169] In step 808, when the terminal 101 determines to activate the terminal positioning operation through step 806, the terminal 101 activates the terminal positioning operation and performs the positioning operation. The terminal 101 performs a UE based positioning operation. The terminal based positioning operation is a method in which the terminal 101 measures a signal related to positioning and directly calculates the positioning for the signal. For example, when the terminal 101 uses a GNSS type positioning technology, the terminal 101 measures a satellite signal and calculates the position of the terminal 101 from the measured signal. When the terminal 101 measures the terminal position, the terminal 101 transmits the measured terminal 101 position or the predicted terminal 101 position to a server in the network. The terminal 101 transmits the measured terminal 101 position information to the LMC 230 via the base station. Alternatively, the terminal 101 transmits the measured terminal 101 position information to the LMF 303 via the base station and the AMF 301.

[0170] As another method for measuring the position of the terminal 101, the terminal 101 performs a UE-assisted positioning operation. The UE-assisted positioning method is a positioning method in which the terminal 101 measures signals for positioning and transmits the measured information to a network, and a server in the network calculates the signal information measured by the terminal 101 to calculate the position of the terminal 101. The terminal 101 transmits the measured signal information for positioning to a server in the network. The terminal 101 transmits the signal information measured by the terminal 101 for positioning to the LMC 230 via the RAN 200. Alternatively, the terminal 101 transmits the signal information measured for terminal positioning to the LMF 303 via the RAN 200 and the AMF 301.

[0171] In step 810, when the terminal 101 activates terminal positioning as described in step 808, the terminal 101 transmits terminal positioning information to the AMF 301 in step 810a. Alternatively, the terminal 101 transmits positioning information to the LMC 230 in steps 810b-1 and 810b-2, or transmits positioning information to the LMF 303 in steps 810c-1 and 810c-2. The terminal 101 can also perform procedure 810 after terminal positioning activation, and performs procedure 810 to perform terminal positioning after a threshold time has elapsed when a terminal positioning request is periodically received and 810 must be performed periodically.

[0172] Furthermore, the terminal 101 performs procedure 810 when the terminal 101 moves and camps on a new base station, changing its position in the 3GPP system so that the terminal 101 enters a peripheral target area.

[0173] <Fifth embodiment>

[0174] FIG. 9 is a signal flowchart illustrating a method for controlling a highly precise positioning based on a registration area according to a fifth embodiment of the present invention.

[0175] Step 900 is a description of a process in which a location information service client transmits a location information service request. A location information service is requested by the terminal 101, a base station, or an external LCS client. This will be considered in detail as follows.

[0176] In step 900a, when the terminal 101 initiates a location information service, the terminal 101 transmits a location information request to the AMF 301 via a NAS message.

[0177] In step 900b, the base station 200 transmits a location information request to the AMF 301 via an N2 message.

[0178] In step 900c, an LCS client (not shown in FIG. 9) outside the system transmits a location information request via the GMLC 310 or the NEF 305. When the GMLC 310 receives the location information service request, the GMLC 310 transmits a UECM acquisition request to the UDM 302. The GMLC 310 receives an AMF 301 identifier or address that manages the destination terminal of the location request from the UDM 302. The GMLC 310 transmits the location information request to the AMF 301.

[0179] A location information request message is delivered to the AMF 301 from the terminal 101, the base station 200, or the GMLC 310. In addition to the contents described in steps 900a / 900b / 900c in Fig. 9, the AMF 301 may receive a location information request message from the NEF 305. Also, the AMF 301 receives a location information subscription request from the UDM 302. The location provision request message received by the AMF 301, or the location information subscription request message, may include information that can be included in the location provision request message described in procedure 500 (500a, 500v-1, 500b-2) of the first embodiment, such as a target terminal identifier, a requester identifier, a request transaction classifier, information on location information service quality (Location QoS), location information service information, and high precision positioning request information. The high precision positioning request information includes at least one of a high precision positioning request indicator, a high precision positioning method, a high precision positioning support type, and a 5G improved positioning service area, such as a 5G improved positioning service area index, a 5G improved positioning service area identification address, GAD information of the 5G improved positioning service, and characteristic information of the 5G improved positioning service area.

[0180] In step 900c-2, the GMLC 310 or the NEF 305 performs a function of mapping from the received 5G-enhanced positioning service area information to the surrounding target area information. The GMLC 310 or the NEF 305 receives the 5G-enhanced positioning service area information included in the location information request. The GMLC 310 or the NEF 305 changes the surrounding target area information to the mapped information from the received 5G-enhanced positioning service area information. The surrounding target area information may be preset for a target area provided by the high-precision positioning service provided by the GMLC 310. Alternatively, it may be dynamically specified from the information received from the request.

[0181] The surrounding target area information includes a cell list, a TA list, an area of ​​interest, a presence reporting area, etc. The GMLC 310 transmits the surrounding target area information and an indicator indicating that the corresponding area is a 5G-improved service area to the AMF 301.

[0182] In step 902, the AMF 301 that has received the location information request changes the 5G-improved positioning service area received from the terminal, base station, or GMLC 310 or NEF 305 to the mapped surrounding target area information. The surrounding target area information may be pre-set for the target area provided by the high-precision positioning service provided by the GMLC 310. Alternatively, it is dynamically specified from the information received from the request. The surrounding target area information may be a cell list, a TA list, an area of ​​interest, a presence reporting area, etc. Alternatively, the AMF 301 may receive information that has already been changed from the 5G-improved service area to the surrounding target area by the GMLC 310 or NEF 305.

[0183] In step 904, if the terminal 101 is in CM idle state, the AMF 301 performs a network-triggered service request procedure.

[0184] In step 906, the AMF 301 identifies (determines) whether the terminal 101 belongs to a 5G-enhanced positioning service area. If the current location of the terminal 101 belongs to the 5G-enhanced positioning service area 420, the AMF 301 configures a registration area with a list of tracking areas including the 5G-enhanced positioning service area 420. If the current location of the terminal 101 does not belong to the 5G-enhanced positioning service area 420 and the 5G-enhanced positioning service area 420 is included in the registration area, the AMF 301 reconfigures the registration area with a tracking area excluding the 5G-enhanced positioning service area 420. Alternatively, the AMF 301 configures the registration area with a surrounding target area 410.

[0185] In step 906, the AMF 301 triggers the execution of a registration procedure for the terminal 101 through a UE configuration update procedure. The AMF 301 transmits a UE Configuration Update command message (906a) to the terminal 101 to request a registration request. The AMF 301 configures a registration area in the surrounding target area 410 and transmits the registration area set as the surrounding target area 410 to the terminal 101.

[0186] The terminal 101, which is requested to transmit the registration request message via the UE Configuration Update command message, sends a message of step 906c to the AMF 301 to start the registration procedure.

[0187] The AMF 301 receives a registration request message from the terminal 101 and identifies (determines):

[0188] (1) If the terminal leaves the registration area configured from the surrounding target area 410, the AMF 301 decides to deactivate the high-precision terminal positioning procedure.

[0189] (2) When the terminal is outside the peripheral target area 410 and then enters the peripheral target area 410, the AMF 301 decides to activate a high-precision terminal positioning procedure.

[0190] In step 908, when the AMF 301 detects entry into the surrounding target area 410 and decides to activate a high-precision terminal positioning procedure, the AMF 301 transmits a step 908a-1 or step 908b-1 message to activate the high-precision terminal positioning procedure. The terminal 101 measures the position of the terminal 101 by performing a terminal-based positioning method or a terminal-assisted positioning method.

[0191] If the location information request is a request to report entry into or exit from the 5G enhanced positioning service region 420, and the LMC 230 or LMF 303 detects entry into or exit from the 5G enhanced positioning service region 420 for which a high-precision position measurement result is requested, the LMC 230 or LMF 303 reports this to the AMF 301 (908a-3, 908b-3). The AMF 301 that receives such an event reports the terminal 101, base station 2, and other nodes that requested the location information request. 0 0, transmit terminal positioning information to GMLC 310 or NEF 305. Transmit the terminal position information to LCS Client 306 that made the request via GMLC 310 or NEF 305.

[0192] Sixth Embodiment

[0193] FIG. 10 is a signal flow chart for controlling high precision positioning after setting a region of interest based on a network according to the sixth embodiment of the present invention.

[0194] 10, the AMF 301 configures an area of ​​interest corresponding to a surrounding target area, and transmits a Location Report Control message to the NG-RAN 200 to start tracking the terminal location in the 3GPP system. The RAN 200 detects the entry or exit of the terminal 101 in the area of ​​interest included in the Location Report Control. When the NG-RAN 200 detects the terminal 101 entering the area of ​​interest, the AMF 301 reports the location of the terminal 101 in the 3GPP system to the AMF 301. When the AMF 301 detects the terminal 101 entering the surrounding target area after the location of the terminal 101 in the 3G system is reported from the RAN 200, the AMF 301 transmits a request to start high precision positioning to the LMC 230 or the LMF 303. When the AMF301 receives a report of the terminal position within the 3GPP system from the RAN200, detects that the terminal 101 has left the surrounding target area, and determines that a request to the terminal 101 to perform high-precision positioning for the area is in progress and that there are no further location information requests, the AMF301 transmits a request to interrupt high-precision positioning execution to the LMC230 or LMF303.

[0195] Step 1000 (1000a, 1000b, 1000c-1, 1000 c -2, 1000c-3) are the same as the procedure 900 described in the fifth embodiment.

[0196] In step 1002, the AMF 301 that has received a location information request from the terminal 101, the base station, the GMLC 310, or the NEF 305 through step 1000 changes the received target area to the mapped surrounding target area information. The surrounding target area information 420 may be pre-set for the target area provided by the high-precision positioning service provided by the AMF 301. Alternatively, it is dynamically specified from the information received from the request. The surrounding target area information 420 is set to a cell list, a tracking area list, an area of ​​interest, a presence reporting area, etc. Alternatively, the AMF 301 receives information that has already been changed from the 5G-improved service area 420 in the GMLC 310 or the NEF 305 to the surrounding target area 410.

[0197] In step 1002, the AMF 301 configures an Area Of Interest corresponding to the surrounding target area 410 and transmits a Location Report Control message to the RAN 200 as the NG-RAN2. 0 0 (1006a-1) to start tracking the terminal location within the 3GPP system. 0 In step 1004, AMF 301 transmits a Location Report Control message to AMF 301. The Location Report Control message includes at least one of information of an area of ​​interest, a location report type, and an identifier for distinguishing a location request.

[0198] The RAN 200 detects (1006a-2) any changes to the location information of the terminal 101. The location information of the terminal 101 includes entry into, movement within, or departure from the area of ​​interest, or changes to the terminal's presence information in the area of ​​interest (UE Presence in Area Of Interest). The presence information of the terminal 101 in the area of ​​interest is expressed as an IN, OUT, or UNKNOWN state.

[0199] In step 1006, when the terminal 101 enters or leaves the region of interest, or when the presence information of the region of interest of the terminal 101 is changed to an UNKNOWN state due to a change in the terminal RRC state information, the RAN 200 transmits a location information report message to the AMF 301 (1006a-3). The AMF 301 receives the terminal presence information for the region of interest from the RAN 200.

[0200] In step 1008, the AMF 301 receives a report of the presence (existence or location) of the terminal 101 in the area of ​​interest from the RAN 200, and when the AMF 301 receives a change in the terminal presence in the area of ​​interest from OUT (outside) to IN (inside) or UNKNOWN (unknown), or when the terminal presence information changes from OUT to IN, the AMF 301 starts a location information procedure for the terminal 101. When LMC 230 is applied to the RAN 200, the AMF 301 transmits a location information request to the RAN 200 to execute an LMC-based positioning procedure. When the LMF 303 method is applied, the AMF 301 transmits a position determination request to the LMF 303 (1006b-1) and starts executing an LMF 303-based positioning procedure.

[0201] Seventh embodiment

[0202] FIG. 11 is a signal flowchart when a terminal performs a positioning procedure using a Location Reporting Control message according to a seventh embodiment of the present invention.

[0203] Refer to Figure 11 below. AMF3 01 This describes a method in which the AMF 301 changes the target area to a surrounding target area 410 and sets this as the area of ​​interest for the terminal 101 when the terminal 101 requests location information from the RAN 200, and when the terminal 101 enters or leaves the surrounding target area 420 set as the area of ​​interest, the RAN node 210 causes the LMC 230 connected to the RAN 200 to perform a terminal positioning procedure.

[0204] Step 1100 is the same as step 1000 in the sixth embodiment.

[0205] In step 1102, the AMF 301, which has received a location information request from the terminal 101, the base station 210, the GMLC 310, or the NEF 305 via step 1100, changes the received target area path to the mapped surrounding target area information 410. The surrounding target area information 410 may be pre-set for the target area provided by the high-precision positioning service provided by the AMF 301. Alternatively, it is dynamically specified from the information received from the request. The surrounding target area information may be a cell list, a tracking area list, an area of ​​interest, a presence reporting area, etc.

[0206] Alternatively, the AMF 301 receives information that has already been changed from the 5G-improved service area 420 to the surrounding target area 410 in the GMLC 310 or the NEF 305. The AMF 301 sets the area of ​​interest for the target terminal 101 to the surrounding target area 410 corresponding to the target area of ​​the location information request (1102). The AMF 301 transmits to the RAN node (200 or 210) an indicator that operates high-precision positioning that satisfies the service quality included in the location information request when the terminal 101 is located within the surrounding target area 410 (1102). The RAN 200 receives a Location Reporting Control message (1102) and tracks the presence (existence or location) of the terminal in the area of ​​interest of the terminal 101. The operation of tracking the terminal includes at least one of detecting the terminal's entry into the area of ​​interest, detecting its departure, or detecting a change in presence information for the area of ​​interest of the terminal due to a change in the RRC state of the terminal.

[0207] In step 1104, the RAN node 200 receives an indicator instructing to perform a location information request when located within the surrounding target area 410, and if the RAN node 200 determines that the presence of the target terminal in the area of ​​interest is changed to IN (inside) or UNKNOWN (unknown), the terminal 101 decides to start a terminal positioning procedure through the LMC 230. The RAN node 200 tracks the departure or RRC state of the terminal 101 into the surrounding target area, and decides to abort the terminal positioning procedure to the LMC 230.

[0208] In step 1106-1, the RAN node 200 that has decided to start the positioning procedure of the terminal transmits a message (LMC Positioning Request) requesting the start of the LMC Positioning procedure to the LMC 230. The LMC Positioning Request message includes the location report type, location information quality information, and the terminal target area (or 5G improved positioning service area 420) that the RAN node 200 received from step 1102. In addition, for more accurate positioning technology determination, the message includes the target terminal identifier, requester identifier, request transaction classifier, information on location information service quality (Location QoS), location information service information, and high precision positioning request information included in the location information request received by the AMF 301 in step 1100. The high precision positioning request information may include a high precision positioning request indicator, a high precision positioning method, a high precision positioning support type, a 5G improved positioning service area, for example, a 5G improved positioning service area index, a 5G improved positioning service area identification address, GAD information of the 5G improved positioning service, and characteristic information of the 5G improved positioning service area.

[0209] In step 1106-2, the LMC 230 receives an LMC Positioning Request message from the base station node 200, and performs a positioning procedure for the terminal via a positioning protocol (eg, LPP) with the terminal.

[0210] In step 1106-3, the LMC 230, having successfully performed a positioning procedure with the terminal 101, transmits an LMC Positioning Response to the RAN node 200.

[0211] In step 1108 , the RAN node 200 receives an LMC Positioning Response message from the LMC 230 .

[0212] This message may include at least one or more of the following: whether the terminal is within the target area, the distance the terminal has moved compared to a previous report of terminal 101, and the terminal's position expressed in GAD (e.g., the terminal's position expressed in latitude / degree).

[0213] In step 1102, if the location report triggering condition requested by the AMF 301 is satisfied, the RNA 200 transmits a location report message to the AMFF 301 in step 1108. Examples of the requested location report triggering condition include at least one of the following information:

[0214] 1) Entering or leaving the target area

[0215] 2) The reporting period has expired since the previous report

[0216] 3) moving a distance greater than or equal to a threshold within the target area;

[0217] When the AMF 301 receives a location request from the terminal 101 in step 1100a, it performs step 1110a and transmits a response. When the AMF 301 receives a location information request from the base station in step 1100b, it performs step 1110b and transmits a response. When the AMF 301 receives a location information request from the GMLC 310 or NEF 305 in step 1100c, it performs step 1110c and transmits a response.

[0218] The location information response message contains the content that the AMF 301 received from the RAN node 200.

[0219] FIG. 13 is a block diagram of each device constituting the 3GPP network according to the present invention.

[0220] In FIG. 13, NF is a network function, and includes not only the NF 307 described in FIGS. 1 to 3, 5a and 5b to 7a and 7b but also the AMF 301, the LMF 303 , GMLC310, 311, 312, UD M3 This applies to all 02, LCS Client 306, and NEF 305.

[0221] The NF memory 1312 is an area for storing control information and generated data for performing the function of the corresponding NF, and is at least one type of storage medium among various storage media such as a hard disk, RAM, and ROM.

[0222] The NF processor 1311 is a subject for reading information stored in the NF memory 1312 and performing corresponding control operations. Thus, it controls operations of interpreting, generating, and / or storing messages transmitted to and received from each NF and / or terminal 101. Such NF processor 1311 is embodied with at least one or more processors.

[0223] The NF communication unit 1313 receives information from other NFs and / or terminals 101 in the respective interface methods, and provides the received information to the NF processor 1311. In addition, the NF communication unit 1313 provides information provided from the NF processor 1311 to other NFs and / or terminals under the control of the NF processor 1311.

[0224] In addition to the configuration of Fig. 13 described above, a separate interface for an operator to manage may be further included. In addition, when the above-mentioned NF is embodied in a network slice form, the above-mentioned configuration may be a minimum configuration for configuring one network slice. In addition, when the above-mentioned NF is embodied in a network slice form, the configuration of Fig. 13 may be applicable to all network slices or two or more network slices.

[0225] Fig. 14 is a block diagram of a terminal according to the present invention. The block diagram of the terminal shown in Fig. 14 illustrates only the minimum configuration for explaining the contents of the present invention.

[0226] It should also be noted that a configuration for locating the terminal is not illustrated in Fig. 14. The terminal positioning device may further include a separate positioning device according to at least one of the above-mentioned methods.

[0227] The terminal memory 1412 includes an area for storing control information required to apply the terminal positioning method described above and / or information required by a user. Such terminal memory 1412 includes at least one or more memories of a hard disk, a RAM, and a ROM.

[0228] The terminal processor 1411 reads data stored in the terminal memory 1412 and performs various controls for performing the positioning operation described in the present invention. The terminal processor 1411 also controls the on / off of the positioning device based on an instruction from the network. The terminal processor 1411 also interprets information received from the network and controls to store at least a part of this information in the terminal memory 1412. The terminal processor 1411 also transmits information based on the positioning result to the AMF via the network, for example, the RAN 200. 301 and / or LMF 303 The terminal processor 1411 controls the terminal communication unit 1413 to provide the above-mentioned functions. The terminal processor 1411 is realized by at least one processor or two or more processors.

[0229] The terminal communication unit 1413 includes an air interface for operating within a 3GPP network of a mobile communication terminal. Such a terminal communication unit 1413 includes a modem and / or a communication processor (CP) and / or an RF module and / or at least one antenna.

[0230] 14, the terminal may be provided with additional components for positioning, such as a WiFi (registered trademark) communication unit, a GPS receiver, a geomagnetic field sensor, an acceleration sensor, an altitude sensor, etc., which are collectively referred to as a positioning unit. The positioning unit is activated and / or deactivated under the control of the terminal processor 1411, and when the terminal is provided with multiple components, one or more components for positioning may be activated or deactivated as necessary. [Industrial Applicability]

[0231] INDUSTRIAL APPLICABILITY The present invention can be used in a mobile communication system to control more precise positioning while reducing the power consumption of a terminal. [Explanation of symbols]

[0232] 101 User Equipment (UE) 200 base stations (NG-RAN) 210, 220 gNB or ng-gNB 230 Location Management Element (LMC) 301 Access and Mobility Management Function (AMF) 302 Integrated Data Management Device (UDM) 303 Location Management Function Device (LMF) 305 Network Exposed Function (NEF) 306 Location Service Client (LCS client) 307 Application Function Device (AF) / NF Device 310 Gateway Mobile Location Center (GMLC) 311H-GMLC 312V-GMLC 400 target cells 410 Surrounding Target Area 420 5G Improved Positioning Service Area 1311 NF Processor 1312 NF Memory 1313 NF Communications Department 1411 Terminal Processor 1412 Terminal Memory 1413 Terminal communication unit

Claims

1. A method performed by a terminal of a mobile communication system, comprising: The method comprises: receiving a message including information on a target area and at least one positioning method for tracking a location of the terminal from a location management function (LMF) device, where the target area corresponds to at least one of a cell list or a tracking area; identifying whether the terminal is included in the target area; If the terminal is located within the target area, identifying the location of the terminal based on the at least one positioning method and the information for the target area; sending a report message to the LMF device, the report message including the location of the terminal; The method according to claim 1, wherein the information on the target area is determined based on a positioning service area that is converted by a gateway mobile location center (GMLC).

2. 2. The method of claim 1, wherein the positioning method includes at least one of: augmented global navigation satellite system (GNSS) or observed time difference of arrival (OTDOA).

3. The message may include: The method of claim 1 , further comprising at least one of a positioning type, a positioning level, or a positioning period.

4. The method of claim 1, wherein the target area includes the positioning service area.

5. The method according to claim 4, further comprising a step of deactivating a positioning operation if the terminal is not included in the target area.

6. In a terminal in a mobile communication system, The terminal includes: A transmitter / receiver unit; a processor coupled to the transceiver; The processor, Receive a message including information on a target area for tracking the location of the terminal and at least one positioning method from a location management function (LMF) device, where the target area corresponds to at least one of a cell list or a tracking area; Identifying whether the terminal is included in the target area; If the terminal is located within the target area, identifying the location of the terminal based on the at least one positioning method and the information for the target area; A terminal transmitting to said LMF device a report message including said location of said terminal.

7. 7. The terminal of claim 6, wherein the positioning method includes at least one of: global navigation satellite system (GNSS) or observed time difference of arrival (OTDOA).

8. The message may include: The terminal of claim 6, further comprising at least one of a positioning type, a positioning level, or a positioning period.

9. The terminal of claim 6, wherein the target area includes a positioning service area.

10. The processor, The terminal of claim 9, characterized in that it is adapted to deactivate a positioning operation if the terminal is not included in the target area.

11. A method performed by a location management function (LMF) device in a mobile communication system, comprising: The method comprises: transmitting, to the terminal, a message including information on a target area and at least one positioning method for tracking a location of the terminal, wherein the target area corresponds to at least one of a cell list or a tracking area; receiving, when the terminal is located within the target area, from the terminal, a report message including the location of the terminal identified based on the at least one positioning method and the information for the target area; The information on the target area is determined based on a positioning service area that is converted by a gateway mobile location center (GMLC).

12. 12. The method of claim 11, wherein the positioning method includes at least one of: global navigation satellite system (GNSS) or observed time difference of arrival (OTDOA).

13. The method of claim 11, wherein the message further includes at least one of a positioning type, a positioning level, or a positioning period.

14. The method of claim 11 , wherein the target area includes the positioning service area.

15. In a location management function (LMF) device in a mobile communication system, The LMF device comprises: A transmitter / receiver unit; a processor coupled to the transceiver; The processor, Sending a message to a terminal, the message including information on a target area for tracking a location of the terminal and at least one positioning method, where the target area corresponds to at least one of a cell list or a tracking area; When the terminal is located within the target area, the LMF device receives a report message from the terminal, the report message including the location of the terminal identified based on the at least one positioning method and the information for the target area.

16. 16. The LMF apparatus of claim 15, wherein the positioning method includes at least one of: augmented global navigation satellite system (GNSS) or observed time difference of arrival (OTDOA).

17. The method of claim 15, wherein the message further includes at least one of a positioning type, a positioning level, or a positioning period.

18. 16. The LMF apparatus of claim 15, wherein the target area includes a positioning service area.

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