System

Abstract

Information indicating a position of a terminal to be searched is acquired.SOLUTION: The system 100 is a system that communicates with a first terminal 40 and a second terminal 50 different from the first terminal 40, and includes receiving a search request that is information requesting a search for a position of the second terminal 50 from the first terminal 40, transmitting a first signal that is a signal for setting the second terminal 40 to a wake-up state in a case where the search request is received, detecting a position of the second terminal 50 in the wake-up state, and transmitting position information indicating the detected position of the second terminal 50 to the first terminal 40. The control unit 11 includes: SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to sensing of terminals. [Background technology]

[0002] There is a technology for providing guidance to the user on the location of a parked vehicle. In this regard, for example, Patent Document 1 discloses a map distribution server that identifies the current location and the parking position of the vehicle, synthesizes a position on a map that corresponds to the current location and the parking position in the vertical direction, generates a guide map, and provides the guide map to the user. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-226484 [Patent Document 2] Japanese Patent Application Laid-Open No. 2006-275520 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure aims to obtain information indicating the location of a terminal to be searched. [Means for solving the problem]

[0005] One aspect of the present disclosure is 1. A system for communicating with a first terminal and a second terminal different from the first terminal, comprising: receiving a search request from the first terminal, the search request being information requesting that the location of the second terminal be searched for; transmitting a first signal that is a signal for waking up the second terminal when the search request is received; Detecting the location of the second terminal that has woken up; transmitting location information indicating the detected location of the second terminal to the first terminal; a control unit that executes the following: It is a system.

[0006] Another aspect is a program for causing a computer to execute the information processing method executed by the above-described system, or a computer-readable storage medium non-temporarily storing the program. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to obtain information indicating the location of a terminal to be searched for. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a diagram showing an outline of processing executed by the system according to the first embodiment. [Figure 2] A diagram showing the components that make up a fifth-generation mobile communication system (5G network). [Figure 3] FIG. 2 is a diagram illustrating components of each device that realizes the system according to the first embodiment. [Figure 4] FIG. 3 is a sequence diagram showing processing executed by the system according to the first embodiment. [Figure 5] FIG. 10 is a sequence diagram showing processing executed by a system according to a second embodiment. [Figure 6] FIG. 10 is a sequence diagram illustrating a process executed by a system according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] (overview) 2. Description of the Related Art There is a technology that provides guidance to users in large commercial facilities and the like to the parking location of their vehicles.

[0010] For example, a conventional information processing device is known that generates a guide map by combining a user's current location with a position corresponding to the vertical direction of the parking location. In a commercial facility or the like, the information processing device projects the user's parking location on a parking lot floor onto a map of the floor where the user is located, thereby generating a guide map that helps the user understand the relationship between the user's current location and the parking location.

[0011] However, with conventional technology, if the user's current location and the parking location where the vehicle is parked are on different floors within a building, it was not possible to provide specific guidance on the route the user should take from their current location to the parking location.

[0012] In order to provide specific guidance on the route that a user should take from their current location to the parking location, it is possible that the core network in a 5G wireless communication system or the like could utilize sensing technology that the core network performs on the terminal (hereinafter referred to as UE) to notify the user of the location of the terminal installed in the vehicle.

[0013] In this case, when the core network senses the location of the UE, the UE may not necessarily be in an awake state. For example, if the UE is an in-vehicle device installed in a vehicle, the in-vehicle device may be in a sleep state together with the vehicle system.

[0014] Therefore, before sensing the target terminal to identify the parking location, the core network transmits a signal to the terminal to activate the terminal.

[0015] A system according to one aspect of the present disclosure includes: A system for communicating with a first terminal and a second terminal different from the first terminal, comprising a control unit that performs the following operations: receiving a search request from the first terminal, which is information requesting that the location of the second terminal be searched for; transmitting a first signal, which is a signal for waking up the second terminal when the search request is received; detecting the location of the second terminal that has woken up; and transmitting location information indicating the detected location of the second terminal to the first terminal.

[0016] The first terminal is, for example, an electronic device such as a smartphone. The first terminal may be a tablet terminal, a personal computer, a wearable terminal, or the like. The first terminal is carried by the user.

[0017] The second terminal is, for example, a communication device mounted on a vehicle. The second terminal provides a wireless communication function so that the vehicle can communicate with an external network. Alternatively, the second terminal may be an in-vehicle terminal that provides a function such as a car navigation system. The second terminal is provided in the user's parked vehicle.

[0018] The search request is information transmitted from the first terminal to the control unit requesting that the control unit search for the location of the second terminal. The search request may include information requesting route guidance to the location of the second terminal.

[0019] The first signal is a signal transmitted from the control unit to the second terminal to put the second terminal into a wake-up state. Here, the wake-up state means that the second terminal is in an activated state. The first signal may be broadcast from the control unit.

[0020] A system according to one embodiment of the present disclosure, when receiving information requesting the location of a second terminal, transmits a signal to activate the second terminal, detects the location of the activated second terminal, and notifies the first terminal of the location of the second terminal.

[0021] With this configuration, the system according to the present disclosure can acquire information indicating the location of the search target terminal even if the search target terminal is in a sleep state. As described above, by the system according to the present disclosure acquiring the location of the search target terminal, it is possible to realize a specific guidance display of the route to be taken to reach the location of the search target terminal.

[0022] Furthermore, the control unit may receive the location information indicating a location of the second terminal, which is transmitted by the second terminal after the second terminal has entered the wake-up state.

[0023] This allows the system according to an embodiment of the present disclosure to obtain information indicating the location of the second terminal and provide it to the first terminal.

[0024] In addition, the second terminal may be an in-vehicle terminal mounted on a vehicle, and the control unit may cause the second terminal to periodically transmit a beacon signal that can be received by the first terminal after the second terminal enters a wake-up state.

[0025] A beacon signal is a radio signal transmitted directly from a second terminal to a first terminal. For example, the first terminal can receive a beacon signal transmitted by the second terminal and determine the location of the second terminal based on the beacon signal.

[0026] The control unit may also receive ID information indicating an identifier of the second terminal from the first terminal, identify the second terminal based on the acquired ID information, and transmit the first signal to the identified second terminal.

[0027] This allows the system according to an embodiment of the present disclosure to identify the second terminal based on the identifier of the second terminal and activate the second terminal.

[0028] In addition, the control unit may receive a sensing result that is the result of the second terminal, which has entered a wake-up state, sensing objects around the second terminal, and further transmit the sensing result to the first terminal.

[0029] For example, a system according to an embodiment of the present disclosure acquires from the second terminal not only the results of sensing the location of the second terminal but also the results of sensing the surroundings of the second terminal. With this configuration, the system according to an embodiment of the present disclosure can acquire information indicating the situation around the second terminal. By acquiring this information, it becomes possible to obtain additional information, such as what is around the second terminal.

[0030] Specific embodiments of the present disclosure will be described below with reference to the accompanying drawings. Unless otherwise specified, the hardware configuration, module configuration, functional configuration, etc. described in each embodiment are not intended to limit the technical scope of the disclosure to those configurations.

[0031] (First embodiment) [Overview of the system processing] An overview of a system according to an embodiment will be described with reference to FIG. 1. FIG. 1 is a diagram showing an overview of a process executed by a system according to a first embodiment. A system according to an aspect of the present disclosure is realized as a system 100. In this embodiment, the system 100 is a Based on a request from a first terminal 40 carried by a user, the system transmits a signal to wake up a second terminal 50 mounted on a vehicle 10 to be searched, and then senses the position of the second terminal 50.

[0032] First, the system 100 receives a search request for the second terminal 50 from the first terminal 40. The search request for the second terminal 50 is information requesting notification of location information of the second terminal 50. Upon receiving the search request for the second terminal 50, the system 100 transmits a wake-up signal to the second terminal 50. The wake-up signal is a signal for activating the second terminal 50. The system 100 may identify the second terminal 50 based on the identifier of the second terminal 50 included in the search request from the second terminal 50 and transmit the wake-up signal, or may broadcast the wake-up signal.

[0033] Next, the second terminal 50 that has received the wake-up signal enters a wake-up state (activated state).

[0034] Next, the system 100 performs location sensing on the second terminal 50 that has entered the wake-up state. For example, the system 100 acquires latitude and longitude information and altitude information of the second terminal 50. Then, the system 100 transmits the acquired location information of the second terminal 50 to the first terminal 40.

[0035] As described above, when the system 100 receives a search request from the second terminal 50, it transmits a wake-up signal to activate the second terminal 50. Then, the system 100 performs location sensing on the activated second terminal 50. By performing sensing, the system 100 acquires location information of the second terminal 50 and transmits it to the first terminal 40.

[0036] This allows the system 100 to acquire information indicating the position of the second terminal 50, which is the terminal to be searched for. For example, the first terminal 40, which has acquired the position information of the second terminal 50 from the system 100, may display a line indicating the route to the second terminal 50 in AR (Augumented Reality) on an image showing the surroundings of the first terminal 40. With this configuration, the system 100 can realize the display of specific guidance of the route from the position of the first terminal 40, which is the user's current position, to the position of the second terminal 50, which is the terminal to be searched for.

[0037] [System Configuration] FIG. 2 shows the components that make up a fifth-generation mobile communication system (5G network). 2, UE (User Equipment) 1 is a terminal of a user (subscriber). In this embodiment, UE1, which is a terminal carried by a user, is referred to as a "first terminal 40," and UE1, which is a terminal mounted on a vehicle, is referred to as a "second terminal 50." The RAN (Radio Access Network) 3 is an access network to the 5G core network (5GC). The RAN 3 is composed of base stations (gNBs). The 5G network has a 5G core network (5GC) and an access network ((R)AN), and a UE 1, a DN 5, and an AF 12 are connected to the 5G network. Each of the NFs 11a to 11m is a function realized by one or more computers (information processing devices) executing a program. However, a single computer may realize two or more of the NFs 11a to 11m. Each of the NFs 11a to 11m can also be referred to as a network node or a network component. The components (structural elements) shown in FIG. 1 realize a system 100 according to an embodiment.

[0038] 5GC is composed of a collection of components with specific functions called NFs (Network Functions). Figure 1 shows the following as NF11 that makes up 5GC. In Figure 1, the multiple elements that make up NF11 are shown as thick rectangles.

[0039] UPF (User Plane Function) 11a AMF (Access and Mobility Management Function)11b SMF (Session Management Function)11c PCF(Policy Control Function)11d NEF(Network Exposure Function)11e NRF(Network Repository Function)11g NSSF(Network Slice Selection Function)11h AUSF(Authentication Server Function)11i UDM(Unified Data Management)11j NWDAF(Network Data Analytics Function)11k SENSING (Sensing Function) 11m

[0040] The UPF 11a performs routing and forwarding of user packets (user plane packets sent and received by the UE 1), packet inspection, and QoS processing.

[0041] The AMF 11b is a device for accommodating UEs in the 5GC. The AMF 11b accommodates the RAN 3 and performs subscriber authentication control, location (mobility) management of UEs 1, and so on.

[0042] The SMF 11c manages PDU (Protocol Data Unit) sessions and controls the UPF 11a to implement QoS (Quality of Service) control and policy control. The PDU session is a virtual communication path for exchanging data between the UE 1 and a DN (Data Network) 5. The DN 5 is a data network (such as the Internet) external to the 5GC.

[0043] The PCF 11d performs QoS control, policy control, billing control, etc. under the control of the SMF 11c. QoS control involves controlling the quality of communication, such as by prioritizing packet forwarding. Policy control involves controlling communication, such as QoS based on network or subscriber information, whether packet forwarding is permitted, and billing.

[0044] NEF11e acts as an intermediary for communication between external nodes and nodes within the control plane.

[0045] The NRF 11g stores and manages information about NFs (e.g., AMF, SMF, UPF, etc.) within the 5GC. In response to an inquiry about an NF desired to be used, the NRF 11g can return multiple NF candidates to the inquiry source.

[0046] The NSSF11h has the function of selecting the network slice to be used by the subscriber from among the network slices generated by network slicing. A network slice is a virtual network with specifications according to the application.

[0047] The AUSF 11i is a subscriber authentication server that performs subscriber authentication under the control of the AMF 11b.

[0048] The UDM 11j holds subscriber-related information, provides subscriber information, or acquires, registers, deletes, and changes the status of UE 1.

[0049] NWDAF11k has the function of collecting and analyzing data from each NF11 and external servers. It is an NF that provides network analysis information.

[0050] SENSING11m performs sensing services, including collecting sensing information from UE1, RAN3 (base station (gNB)), or other nodes, and providing the collected sensing information to UE1 or other external systems (AF12, DN5, etc.). Details of SENSING11m will be described later.

[0051] The AF12 is an NF that provides application services via the NRF11g as part of the 5GC, or an NF that is external to the 5GC and provides application services via the NEF11e. The AF12 performs processing using sensing data, for example. As an example, the AF12 notifies the first terminal 40 of the location of the second terminal 50 being searched for, which is acquired by the SENSING11m. Alternatively, an application program executed on the first terminal 40 may operate as the AF12.

[0052] In 5GC, multiple NFs of the same type may be prepared. For example, an NF 11 may be prepared for each data center (station). Also, one NF 11 may be shared between data centers. Also, multiple NFs 11 of the same type may be configured in one data center. The number of data centers, the number of NFs 11, and the correspondence between the NFs 11 and the data centers may be set as appropriate.

[0053] <Configuration of information processing device and terminal> 3A is a diagram showing an example of the configuration of an information processing device 20 that can operate as each component constituting a system 100 (5G communication system) according to an embodiment. In FIG. 3A, the information processing device 20 can be configured using a dedicated or general-purpose information processing device (computer) such as a personal computer (PC), a workstation (WS), or a server machine. However, the information processing device 20 may also be a collection (cloud) of one or more computers.

[0054] The information processing device 20 includes a processor 21 as a processing unit or control unit (controller), a storage device 22, a communication interface 23 (communication IF 23), an input device 24, and a display 25, which are interconnected via a bus 26.

[0055] The storage device 22 includes a main storage device and an auxiliary storage device. The main storage device is used as at least one of a storage area for programs and data, a program expansion area, a program work area, and a buffer area for communication data. The main storage device is configured with RAM (Random Access Memory) or a combination of RAM and ROM (Read Only Memory). The auxiliary storage device is used as a storage area for data and programs. A non-volatile storage medium is used as the auxiliary storage device. Examples of non-volatile storage media include a hard disk, a solid state drive (SSD), a flash memory, and an EEPROM (Electrically Erasable Programmable Read-Only Memory). The storage device 22 may also include a drive device for a disk recording medium.

[0056] The communication IF 23 is a circuit that performs communication processing. For example, the communication IF 23 is a network interface card (NIC). Alternatively, the communication IF 23 may be a wireless communication circuit that performs wireless communication (5G, wireless LAN (Wi-Fi (registered trademark)), BLE, etc.). The communication IF 23 may also be a combination of a circuit that performs wired communication processing and a wireless communication circuit.

[0057] The input device 24 includes keys, buttons, a pointing device, a touch panel, etc. The display 25 is, for example, a liquid crystal display, and displays information and data.

[0058] The processor 21 performs various processes by executing various programs stored in the storage device 22. The processor 21 executes the programs stored in the storage device 22, allowing the information processing device 20 to operate as each of the NFs 11a to 11m and the external servers 12a and 12b. The processor 21 is a specific example of a control unit of the system 100.

[0059] 3(B) is a diagram showing an example configuration of a first terminal 40 that is a terminal capable of operating as UE 1. The first terminal 40 includes a processor 41, a storage device 42, a communication interface 43 (communication IF 43), an input device 44, and a display 45, which are interconnected via a bus 46. The processor 41, the storage device 42, the communication IF 43, the input device 44, and the display 45 can be similar to the processor 21, the storage device 22, the communication IF 23, the input device 24, and the display 25. Therefore, a description thereof will be omitted.

[0060] The processors 21 and 41 are, for example, central processing units (CPUs). The CPU is also called a Microprocessor Unit (MPU). Processors 21 and 41 are: The processors 21 and 41 may have a single processor configuration or a multi-processor configuration. Also, a single physical CPU connected via a single socket may have a multi-core configuration. The processors 21 and 41 may include arithmetic units of various circuit configurations, such as a Digital Signal Processor (DSP) or a Graphics Processing Unit (GPU). The processors 21 and 41 may also have a configuration in which they cooperate with at least one of an integrated circuit (IC), other digital circuit, and analog circuit. The integrated circuit may be an LSI, an Application Specific Integrated Circuit (ASIC), or a programmable logic device ( PLDs include, for example, Field-Programmable Gate Arrays (FPGAs) The processors 21 and 41 also include what are called, for example, a microcontroller (MCU), a system-on-a-chip (SoC), a system LSI, or a chipset.

[0061] 3(C) is a diagram showing an example of the configuration of a second terminal 50 capable of operating as UE 1. The second terminal 50 includes a processor 51, a storage device 52, and a communication interface 53 (communication IF 43), which are interconnected via a bus 56. The processor 51, storage device 52, and communication IF 53 can be similar to the processor 21, storage device 22, and communication IF 23. Therefore, a description thereof will be omitted.

[0062] [System Processing] Next, specific details of the processing performed by the system 100 according to one embodiment of the present disclosure will be described. Fig. 4 is a sequence diagram showing the processing performed by the system 100 according to the first embodiment. Fig. 4 describes the processing in which the system 100 remotely activates the second terminal 50 and then senses the second terminal 50.

[0063] The first terminal 40 starts step S10 when the user performs a predetermined operation on the first terminal 40.

[0064] First, in step S10, the first terminal 40 transmits information requesting route guidance to the location of the second terminal 50 to the AF 12. The first terminal 40 includes an identifier for identifying the second terminal 50 in the information requesting route guidance. Note that the information requesting route guidance is a specific example of a search request, and is information requesting that the location of the second terminal 50 be searched for.

[0065] In step S11, the AF 12 transmits to the SENSING 11m an acquisition request, which is information requesting the SENSING 11m to acquire location information of the second terminal 50. The acquisition request includes an identifier for identifying the second terminal 50.

[0066] Next, in step S12, the SENSING 11m transmits an execution request to the NWDAF 11k to request that the NWDAF 11k execute sensing of the position of the second terminal 50. The execution request includes an identifier for identifying the second terminal 50.

[0067] Subsequently, in step S13, the NWDAF 11k identifies the second terminal 50 based on the identifier for identifying the second terminal 50.

[0068] Next, in step S14, the NWDAF 11k transmits a wake-up signal to the second terminal 50 identified in step S13 to start up the second terminal 50. The wake-up signal is a specific example of the first signal.

[0069] In step S15, the second terminal 50 that has received the wake-up signal enters an active state.

[0070] Next, in step S16, the NWDAF 11k performs position sensing on the activated second terminal 50. The NWDAF 11k collects sensing information including position information of the second terminal 50.

[0071] Next, in step S17, the NWDAF 11k transmits an implementation response, which is information including the results of the sensing, to the SENSING 11m. The implementation response includes location information of the second terminal 50. The location information of the second terminal 50 may be, for example, latitude and longitude information and altitude information.

[0072] Next, in step S18, SENSING 11m transmits an acquisition response including the location information of the second terminal 50 to the AF 12. The acquisition response includes the location information of the second terminal 50 transmitted to SENSING 11m in step S17.

[0073] Next, in step S19, AF12 transmits a search response to the first terminal 40, including location information of the second terminal 50 and route guidance information to the location of the second terminal 50. For example, AF12 may calculate a route from the current location of the first terminal 40 to the location of the second terminal 50 based on the location information of the second terminal 50 received from SENSING11m and information indicating the current location of the first terminal 40 received in the search request, and transmit the route to the first terminal 40.

[0074] Note that the first terminal 40 may not include an identifier for identifying the second terminal 50 in the search request, and in that case, the acquisition request and the implementation request may not include an identifier for identifying the second terminal 50. If the implementation request does not include an identifier for identifying the second terminal 50, the NWDAF 11k may broadcast a wake-up signal.

[0075] As described above, when the system 100 according to the first embodiment receives information from the first terminal 40 requesting that the location of the second terminal 50 be searched for, the system 100 transmits a signal to activate the second terminal 50 and performs location sensing on the activated second terminal 50. The system 100 then acquires information indicating the location of the second terminal 50 and transmits the information indicating the location of the second terminal 50 to the first terminal 40.

[0076] (Modification of the first embodiment) The second terminal 50 (UE1) that entered the wake-up state in step S15 of the first embodiment may itself sense objects around itself. The second terminal 50 may then transmit the sensing results of the sensing of the objects around itself to the NWDAF 11k. The NWDAF 11k transmits the received sensing results to the first terminal 40 via SENSING 11m and AF 12. The first terminal 40 can acquire the results of the sensing performed by the second terminal 50 and use them for various calculations.

[0077] For example, if the second terminal 50 is a device mounted on a vehicle, it can obtain information about what is around the vehicle (auxiliary information for identifying the vehicle's location) and provide it to the first terminal 40.

[0078] (Second embodiment) In the first embodiment, the system 100 senses the position of the second terminal 50 that has entered an active state. In response to this, a configuration is also conceivable in which the second terminal 50 that has entered an active state transmits its own position information to the system 100. Therefore, in the second embodiment, the second terminal 50 that has entered an active state receives a wake-up signal from the system 100 and transmits its own position information to the system 100.

[0079] FIG. 5 is a sequence diagram showing processing executed by the system according to the second embodiment.

[0080] UE1, which is the first terminal 40, starts step S20 when the user performs a predetermined operation on the first terminal 40.

[0081] First, in step S20, the first terminal 40 transmits information requesting route guidance to the location of the second terminal 50 to the AF 12. The first terminal 40 includes an identifier for identifying the second terminal 50 in the information requesting route guidance. Note that the information requesting route guidance is a specific example of a search request, and is information requesting that the location of the second terminal 50 be searched for.

[0082] In step S21, the AF 12 transmits to the SENSING 11m an acquisition request, which is information requesting the SENSING 11m to acquire location information of the second terminal 50. The acquisition request includes an identifier for identifying the second terminal 50.

[0083] Next, in step S22, the SENSING 11m transmits to the NWDAF 11k an execution request, which is a request to sense the position of the second terminal 50. The execution request includes an identifier for identifying the second terminal 50.

[0084] Subsequently, in step S23, the NWDAF 11k identifies the second terminal 50 based on the identifier for identifying the second terminal 50.

[0085] Next, in step S24, the NWDAF 11k transmits, to the second terminal 50 identified in step S23, a wake-up signal for activating the second terminal 50. The wake-up signal is a specific example of the first signal.

[0086] In step S25, the second terminal 50 that has received the wake-up signal enters an active state.

[0087] Next, in step S26, the second terminal 50 transmits the location information of the second terminal 50. For example, the second terminal 50 may transmit the latitude and longitude information and altitude information of the second terminal 50. good.

[0088] Subsequently, in step S27, the NWDAF 11k transmits the location information of the second terminal 50 received in step S26 to the SENSING 11m.

[0089] Next, in step S28, SENSING 11m transmits an acquisition response including the location information of the second terminal 50 to the AF 12. The acquisition response includes the location information of the second terminal 50 transmitted to SENSING 11m in step S27.

[0090] Next, in step S29, AF12 transmits a search response to the first terminal 40, including location information of the second terminal 50 and route guidance information to the location of the second terminal 50. For example, AF12 may calculate a route from the current location of the first terminal 40 to the location of the second terminal 50 based on the location information of the second terminal 50 received from SENSING11m and information indicating the current location of the first terminal 40 received in the search request, and transmit the route to the first terminal 40.

[0091] Note that the first terminal 40 may not include an identifier for identifying the second terminal 50 in the search request, and in that case, the acquisition request and the implementation request may not include an identifier for identifying the second terminal 50. If the implementation request does not include an identifier for identifying the second terminal 50, the NWDAF 11k may broadcast a wake-up signal.

[0092] As described above, when the system 100 according to the second embodiment receives information from the first terminal 40 requesting that the location of the second terminal 50 be searched for, it transmits a signal to activate the second terminal 50 and acquires location information of the second terminal 50 from the activated second terminal 50. Then, the system 100 transmits information indicating the location of the second terminal 50 to the first terminal 40.

[0093] (Third embodiment) In the first embodiment, the system 100 senses the position of the second terminal 50 that has entered an active state. In contrast to this, a configuration is also conceivable in which the second terminal 50 that has entered an active state periodically transmits a beacon signal to announce its own presence. Therefore, in the third embodiment, the second terminal 50 that has entered an active state receives a wake-up signal from the system 100 and periodically transmits a beacon signal by itself, and the first terminal 40 identifies the position of the second terminal 50 based on the beacon signal.

[0094] FIG. 6 is a sequence diagram showing processing executed by the system according to the third embodiment.

[0095] The first terminal 40 starts step S30 when the user performs a predetermined operation on the first terminal 40.

[0096] First, in step S30, the first terminal 40 transmits information requesting route guidance to the location of the second terminal 50 to the AF 12. The first terminal 40 includes an identifier for identifying the second terminal 50 in the information requesting route guidance. Note that the information requesting route guidance is a specific example of a search request, and is information requesting that the location of the second terminal 50 be searched for.

[0097] In step S31, the AF 12 transmits to the SENSING 11m an acquisition request, which is information requesting the SENSING 11m to acquire location information of the second terminal 50. The acquisition request includes an identifier for identifying the second terminal 50.

[0098] Next, in step S32, the SENSING 11m transmits to the NWDAF 11k an execution request, which is a request to sense the position of the second terminal 50. The execution request includes an identifier for identifying the second terminal 50.

[0099] Subsequently, in step S33, the NWDAF 11k identifies the second terminal 50 based on the identifier for identifying the second terminal 50.

[0100] Next, in step S34, the NWDAF 11k transmits a wake-up signal to the second terminal 50 identified in step S23 to start up the second terminal 50. The wake-up signal is a specific example of the first signal.

[0101] In step S35, the second terminal 50 that has received the wake-up signal enters an active state.

[0102] Next, in step S36, the second terminal 50 periodically transmits a beacon signal to announce its presence. The beacon signal may include location information of the second terminal 50. The location information of the second terminal 50 is, for example, latitude and longitude information and altitude information.

[0103] Next, in step S37, the first terminal 40 determines the location of the second terminal 50 based on the beacon signal received in step S36. For example, the first terminal 40 may determine the location of the second terminal 50 based on the reception strength and direction of the beacon signal. Alternatively, if the beacon signal includes location information of the second terminal 50, the first terminal 40 may determine the location of the second terminal 50 based on the location information of the second terminal 50.

[0104] After step S37, the first terminal 40 may transmit location information of the identified second terminal 50 to AF12 and obtain information about the route from the location of the first terminal 40 to the location of the second terminal 50 from AF12.

[0105] Furthermore, the first terminal 40 may not include an identifier for identifying the second terminal 50 in the search request, and in that case, the acquisition request and the implementation request may not include an identifier for identifying the second terminal 50. If the implementation request does not include an identifier for identifying the second terminal 50, the NWDAF 11k may broadcast a wake-up signal.

[0106] As described above, when the system 100 according to the third embodiment receives information from the first terminal 40 requesting that the location of the second terminal 50 be searched for, the system 100 transmits a signal to activate the second terminal 50. The activated second terminal 50 then periodically transmits a beacon signal that can be received by the first terminal 40. The first terminal 40 then receives the beacon signal and identifies the location of the second terminal 50.

[0107] (Other variations) The above-described embodiment is merely an example, and the present disclosure may be modified as appropriate within the scope of the present disclosure. For example, the processes and means described in the present disclosure may be freely combined and implemented as long as no technical contradiction occurs.

[0108] The present disclosure can also be realized by supplying a computer program that implements the functions described in the above embodiments to a computer, and having one or more processors in the computer read and execute the program. Such a computer program may be provided to the computer by a non-transitory computer-readable storage medium connectable to the system bus of the computer, or may be provided to the computer via a network. Non-transitory computer-readable storage media include, for example, any type of disk, such as a magnetic disk (e.g., a floppy disk, a hard disk drive (HDD), etc.), an optical disk (e.g., a CD-ROM, a DVD disk, a Blu-ray disk), a read-only memory (ROM), a random-access memory (RAM), an EPROM, an EEPROM, a magnetic card, a flash memory, an optical card, or any type of medium suitable for storing electronic instructions. [Explanation of symbols]

[0109] 100···System 11m···SENSING 11k···NWDAF 12···AF 20. Information processing device 21. Processor 40...First terminal 50...Second Terminal

Claims

1. 1. A system for communicating with a first terminal and a second terminal different from the first terminal, comprising: receiving a search request from the first terminal, the search request being information requesting that the location of the second terminal be searched for; transmitting a first signal that is a signal for waking up the second terminal when the search request is received; Detecting a location of the second terminal that has entered the wake-up state; transmitting location information indicating the detected location of the second terminal to the first terminal; a control unit that executes the following: system.

2. The control unit receiving the location information indicating the location of the second terminal transmitted by the second terminal after the second terminal has entered the wake-up state; The system of claim 1 .

3. the second terminal is an in-vehicle terminal mounted in a vehicle, The control unit After the second terminal enters the wake-up state, the second terminal periodically transmits a beacon signal that can be received by the first terminal. The system of claim 1 .

4. The control unit receiving, from the first terminal, ID information indicating an identifier of the second terminal; identifying the second terminal based on the acquired ID information, and transmitting the first signal to the identified second terminal; 3. The system according to claim 1 or 2.

5. The control unit The second terminal in the wake-up state receives a sensing result obtained by sensing an object around the second terminal, and further transmits the sensing result to the first terminal.

3. The system according to claim 1 or 2.

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