Network system, terminal, and notification method

Abstract

In the case of issuing emergency information in a plurality of networks, a terminal can appropriately notify the emergency information from the own network. A network system includes a base station in each of a plurality of networks; and a terminal which can be communicatively connected to any one of the plurality of networks by wireless communication, and in which first identification information capable of identifying each of the plurality of networks is preset. A base station transmits emergency information, which is associated with first identification information set in a network to which the base station is communicatively connected, to a terminal existing within a wireless communication range of the base station so that the emergency information can be received regardless of the presence or absence of a communication connection. When the terminal receives the emergency information associated with the first identification information from the base station, the terminal uses only the emergency information received from the network to which the terminal is communicatively connected as a notification target on the basis of the first identification information associated with the emergency information.

Description

Technical Field

[0001] One aspect of the present invention relates to a network system, a terminal, and a notification method. This application claims priority based on Japanese Patent Application No. 2022-156591 filed in Japan on September 29, 2022, and the contents thereof are incorporated herein by reference. Background Art

[0002] In 3GPP (registered trademark), standard technical specifications for providing the basis for the release of emergency information such as PWS (Public Warning System) are defined. For example, as PWS, emergency information based on ETWS (Earthquake and Tsunami Warning System), CMAS (Commercial Mobile Alert System), etc. is released (for example, refer to non-patent document 1). For example, earthquakes and tsunamis are reported through pre-specified message IDs (Message IDs). In addition, there is also a range of message IDs that can be individually specified by communication operators (for example, "A000-AFF") (for example, see "9.4.1.2.2" of non-patent document 2). In addition, since emergency information (message ID) is repeatedly released multiple times in order to increase the probability of reaching the terminal, repeated detection of message IDs is performed on the terminal side, so that for the same emergency information (message ID), a certain time (for example, 1 hour or 24 hours, etc.) is ignored (for example, refer to "8.2" of non-patent document 2). In addition, in recent years, the technical requirements and system completion of the fifth-generation mobile communication system (hereinafter referred to as "local 5G"), which can be used by various entities such as local enterprises and municipalities to build point-to-point networks within their own buildings and land, has been promoted. Prior art literature Non-patent literature

[0003] Non-patent document 1: 3GPP TS22.268v17.0.0 (2022-03) Non-patent document 2: 3GPP TS23.041v17.4.0 (2022-06) Non-patent document 3: Guidelines for local 5G introduction, "online", December 1997 (final revision in March 2005), Ministry of Internal Affairs and Communications, "retrieved on September 26, 2005", Internet (https: / / www.soumu.go.jp / main_content / 000804382.pdf) Summary of the invention Technical Problems to be Solved by the Invention

[0004] The current PWS system is basically used for the release of emergency information by communication carriers. However, if local 5G and other self-operated networks use PWMS in the future, it is considered to freely use the range of message IDs that can be individually specified by communication operators in each network (for example, "A000~AFFF"). In this case, the terminal may first receive the message ID from other nearby networks, and then receive the same message ID from its own network (hereinafter referred to as "its own network") that it originally wanted to receive. For example, in the case of private use of local 5G, the PLMN (Public Land Mobile Network) of each network uses "999-002" (refer to non-patent document 3: p.19), so it can receive message IDs from other networks and may not be able to distinguish them. Therefore, the terminal may mistakenly display emergency information from other networks, or the emergency information from its own network that was originally intended to be displayed may be detected as a duplicate and ignored.

[0005] One aspect of the present invention has been made in view of the above problem, and one object thereof is to provide a network system, a terminal, and a notification method in which, when emergency information is distributed in a plurality of networks, a terminal can appropriately notify emergency information from its own network. Solutions for solving problems

[0006] In order to solve the above-mentioned problem, one method of the present invention is a network system, which is a base station in each of a plurality of networks; and a terminal, which is a network system capable of being communicatively connected to any one of the plurality of networks through wireless communication, and is pre-set with a first identification information capable of identifying each of the plurality of networks. The base station sends emergency information to the terminal within the range of its own wireless communication in a manner that can be received regardless of whether there is a communication connection, and the emergency information is associated with the first identification information set in the network to which the base station is communicatively connected. The terminal includes: a receiving unit, which receives an emergency unit associated with the first identification information from the base station; and a control unit, which, when the receiving unit receives the emergency information, only uses the emergency information received from the network to which the terminal is communicatively connected as a notification object based on the first identification information associated with the emergency information.

[0007] In addition, one embodiment of the present invention is a terminal that can be communicatively connected to any one of the base stations in each of a plurality of networks through wireless communication, and is pre-set with first identification information that can identify each of the plurality of networks. The terminal includes: a receiving unit that receives emergency information associated with the first identification information from the base station regardless of whether there is a communication connection with the base station or not, when the terminal is within the wireless communication range of the base station; and a control unit that, when the receiving unit receives the emergency information, only uses the emergency information received from the network to which the terminal is communicatively connected as a notification object based on the first identification information associated with the emergency information.

[0008] In addition, one embodiment of the present invention is a notification method, which is a notification method for emergency information in a network system including a base station and a terminal in each of a plurality of networks, wherein the terminal can be connected to any one of the plurality of networks through wireless communication, and the notification method includes: a step in which a first identification information capable of identifying each of the plurality of networks is pre-set, the base station sends the emergency information to the terminal within the range of its own wireless communication in a manner that the terminal can receive the emergency information regardless of whether a communication connection is present, the emergency information being associated with the first identification information set in the network to which the base station is connected; a step in which the terminal receives an emergency part associated with the first identification information from the base station; and a step in which, when the emergency information is received, only the emergency information received from the network to which the terminal is connected is used as a notification object based on the first identification information associated with the emergency information.

[0009] In addition, one embodiment of the present invention is a notification method, which is a notification method for emergency information in a terminal that can be communicatively connected to any one of base stations in each of multiple networks through wireless communication, the notification method comprising: a step of pre-setting first identification information that can identify each of the multiple networks, the terminal receiving emergency information associated with the first identification information from the base station regardless of whether the terminal has a communication connection with the base station or not, when the terminal is within the wireless communication range of the base station; and a step of, when the emergency information is received, only the emergency information received from the network to which the terminal is communicatively connected as a notification object based on the first identification information associated with the emergency information. Effects of the Invention

[0010] According to the above aspect of the present invention, when emergency information is distributed in a plurality of networks, a terminal can appropriately notify the emergency information from its own network. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1This is a diagram showing an example of a schematic configuration of a network system according to the first embodiment. Figure 2 This is a diagram showing an overview of processing when the terminal according to the first embodiment receives emergency information from a plurality of private networks. Figure 3 This is a block diagram showing an example of a schematic configuration of a private network according to the first embodiment. Figure 4 This is a block diagram showing an example of a schematic configuration of a terminal according to the first embodiment. Figure 5 This is a flowchart showing an example of the notification process of emergency information according to the first embodiment. Figure 6 This is a flowchart showing an example of the notification process of emergency information according to the second embodiment. Figure 7 This is a diagram showing an example of the priority of emergency information set in a private network according to the third embodiment. Figure 8 This is a flowchart showing an example of the notification process of emergency information according to the third embodiment. DETAILED DESCRIPTION

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. <First embodiment> [summary] First, an overview of the network system according to the first embodiment will be described. According to regional needs and individual needs, the local 5G (fifth generation mobile communication system) system is being promoted as a communication system that can be used by various entities. Using this local 5G, various entities other than communication operators can build their own networks in their own buildings and land. In addition, currently, only communication operators use PWS (Public Warning System) to release emergency information, but it is envisioned that emergency information using PWS will also be released in local 5G and other self-operated networks in the future.

[0013] When using PWS in a self-operated network, in addition to earthquakes and tsunamis, there may be private emergency information that should be reported first. Private emergency information refers to, for example, fire, gas leakage, radiation leakage, flooding, underground flooding, river overflow, avalanche, flames, suspicious person information, etc. In addition, in a self-operated network, it is also envisioned that PWS is used to report relatively non-urgent private messages. For example, it is also envisioned that PWS is used in contact matters with employees, sharing information about lost children with store clerks, notification of traffic information such as train delays and traffic jams, notification of weather information such as heat stroke warnings and heavy rain warnings, etc.

[0014] Figure 1 1 is a diagram showing an example of a schematic configuration of a network system involved in the present embodiment. The network system SYS involved in the present embodiment includes a plurality of base stations 10 in self-operated networks NW, and a terminal 20 capable of establishing a communication connection with any one of the plurality of self-operated networks NW through wireless communication. In the figure, two self-operated networks NW, namely, self-operated network NW1 and self-operated network NW2, are shown, but there may be more than three self-operated networks NW. In the example shown in the figure, the base station 10 in the self-operated network NW1 is represented as base station 10-1, and the base station 10 in the self-operated network NW2 is represented as base station 10-2. In addition, the terminal 20 that is communicatively connected to the base station 10-1 in the self-operated network NW2 is represented as terminal 20-1a and terminal 20-1b, and the terminal 20 that is communicatively connected to the base station 10-2 in the self-operated network NW2 is represented as terminal 20-2.

[0015] Here, an example of the configuration when broadcasting emergency information using ETWS (Earthquake and Tsunami Warning System) as PWS in a self-operated network NW using local 5G is described. Emergency information is associated with a message ID (Message ID) for each of its contents, and a specified message ID is used for notification for each content. When a self-operated network NW is used in a local 5G, the range of message IDs that can be individually specified by operators using each network NW is determined (for example, "A000~AFFF") (3GPP TS23.0419.4.1.2.2). Therefore, if each operator operating each network NW uses the range of "A000~AFFF" individually, even if it is the same message ID, different emergency information will be displayed in each network NW. For example, in self-operated network NW1, message ID "A000" is specified as "fire", but in self-operated network NW2, the same message ID "A000" can be specified as "child loss".

[0016] In addition, when a privately operated network NW is used in local 5G, each network NW uses the same PLMN (Public Land Mobile Network) (for example, "999-002"). Therefore, the message ID of each network NW cannot be distinguished from the PLMN. As described above, even if the same message ID is used, different emergency information may be represented in the self-operated network NW1 and the self-operated network NW2. Therefore, in this embodiment, a network identifier is set as identification information for identifying each network NW so that it can be distinguished which self-operated network NW the message ID comes from. When publishing emergency information from each network NW, the emergency information (message ID) and the network identifier are associated and published.

[0017] The network identifier may be an identifier for identifying the base station 10 in each network NW or an identifier for identifying the core network. Here, the network identifier set in the private network NW1 is set to "α", and the network identifier set in the private network NW2 is set to "β" for description.

[0018] Emergency information released from each network NW can be released to the terminals 20 existing in the communication circle of each network NW in a receivable manner regardless of whether the communication connection with the network NW is established. In local 5G, regional adjustment and interference adjustment are performed during the setting, but for example Figure 1 As shown, since the terminal 20-1b that is communicatively connected to the base station 10-1 of the self-operated network NW1 also exists in a place close to the self-operated network NW2, there is a possibility that the emergency information issued not only from the self-operated network NW1 but also from the self-operated network NW2 can be received. Figure 2 The processing in the terminal 20 - 1 b at this time will be described.

[0019] Figure 2 This is a diagram showing an overview of the processing when the terminal involved in this embodiment receives emergency information from multiple self-operated networks. The emergency information (message ID) issued from the self-operated network NW1 is associated with the network identifier "α". On the other hand, the emergency information (message ID) issued from the self-operated network NW2 is associated with the network identifier "β".

[0020] When receiving emergency information (message ID) distributed from the private network NW1, the terminal 20-1b associates the received emergency information (message ID) with the network identifier "α" of the private network NW1 to which the terminal 20-1b is communicatively connected, and therefore targets the notification.

[0021] In addition, when the terminal 20-1b receives emergency information (message ID) issued from the self-operated network NW2, the received emergency information (message ID) is not used as a notification object because it is associated with the network identifier "β" of another self-operated network NW2 that is not the self-operated network NW1 to which the terminal 20-1b is communicating. For example, when the terminal 20-1b receives emergency information (message ID) associated with the network identifier "β" of another self-operated network NW2, the received emergency information (message ID) is discarded.

[0022] That is, when receiving emergency information (message ID), terminal 20-1b confirms which self-operated network NW the information is sent from based on the network identifier, and only the emergency information (message ID) received from the self-operated network NW connected to terminal 20-1b is used as the notification object. For example, when terminal 20-1b receives emergency information (message ID) from the self-operated network NW connected to itself, it displays information notifying the emergency information (e.g., the occurrence of an earthquake) based on the message ID or outputs a notification sound.

[0023] Thus, in the network system SYS according to the present embodiment, when emergency information is distributed in a plurality of private networks NW, the terminal 20 can appropriately display only emergency information from the private network NW to which it is communicatively connected.

[0024] [Composition of self-operated network] Figure 3 This is a block diagram showing an example of the schematic configuration of a self-operated network involved in the present embodiment. For example, each self-operated network NW independently includes a CBCF (Cell Broadcast Centre Function) 31, an AMF (Access and Mobility Management Function) 32 and a base station 10, and is configured to be able to communicate with a terminal 20.

[0025] CBCF31 receives emergency information from CBE (Cell Broadcast Entity) which is the information transmission source of the Meteorological Agency and the like. For example, CBCF31 receives information such as earthquakes and tsunamis from the Meteorological Agency and the like. In addition, CBCF31 receives information not only from the Meteorological Agency and the like, but also from sensors installed nearby and self-operated CBEs using the sensors and the like within the area of ​​each network, such as fires, gas leaks, radiation leaks, floods, underground flooding, river overflows, avalanches, fire sprays, and information about suspicious persons. Furthermore, CBCF 31 receives private information such as contact matters with employees and information about missing children from operators (enterprises, facilities, stores, etc.) that operate their own networks.

[0026] CBCF31 notifies the received emergency information with the specified message ID. For example, in each self-operated network NW, a range of message IDs that can be individually specified by the operator (for example, "A000~AFFF") is used, and multiple message IDs that can be associated with the content of each emergency information are individually specified. As described above, for example, for the message ID "A000", it is associated with "fire" in the self-operated network NW1, and is associated with "child loss" in the self-operated network NW2. That is, the message ID "A000" indicates "fire" in the self-operated network NW1, but indicates "child loss" in the self-operated network NW2.

[0027] For example, the CBCF 31 sends the message ID to the AMF 32 in association with the network identifier set in its own self-operated network NW. The message ID is included in the system information block (SIB: System Information Block) used to notify emergency information. For example, in ETWS, the message ID is included in SIB6 or SIB7. The network identifier is also assigned to, for example, SIB6 or SIB7. That is, the network identifier is included in the system information block, for example.

[0028] The AMF 32 is a network function (NF) having functions such as mobility management, and is communicatively connected to the CBCF 31 and the base station 10. When a plurality of base stations 10 are provided in one private network NW, the AMF 32 is communicatively connected to the plurality of base stations 10.

[0029] The base station 10 is a RAN (Radio Access Network) node with a radio access function, and can be connected to multiple terminals 20 for communication. For example, the base station 10 receives the message ID and network identifier sent from the CBCF 31 via the AMF 32, and sends them to the terminal 20. In addition, the base station 10 sends the message ID to the terminal 20 existing in its own communication range (within the range of wireless communication) in a manner that can be received regardless of whether there is a communication connection. The message ID is associated with the network identifier set in the self-operated network NW to which the base station 10 is connected for communication. In addition, the base station 10 repeatedly sends the message ID multiple times in order to increase the probability of reaching the terminal 20.

[0030] The terminal 20 is communicatively connected to the base station 10. For example, the terminal 20 receives emergency information associated with the message ID and the network identifier issued from the CBCF 31 from the base station 10 via the AMF 32 and the base station 10. In addition, the terminal 20 receives emergency information not only from the base station 10 to which the communication is connected, but also from the base station 10 of other self-operated networks NW that are not communicatively connected, as long as they are within the communication range of the base station 10.

[0031] [Terminal configuration] Figure 4 2 is a block diagram showing an example of the schematic configuration of a terminal involved in this embodiment. The terminal 20 is an information processing device used by a user, such as a portable terminal such as a smart phone, a tablet PC (Personal Computer), or a notebook computer. The terminal 20 includes a display unit 21, an input unit 22, a speaker 23, a communication unit 24, a storage unit 25, and a control unit 26.

[0032] The display unit 21 is composed of, for example, a liquid crystal display (LCD), an organic EL (ElectroLuminescence) display, etc. For example, the display unit 21 displays display data generated based on program processing executed under the control of the control unit 26. In addition, the display unit 21 displays information based on emergency information received from the private network NW under the control of the control unit 26.

[0033] The input unit 22 is an input device that receives user operations. For example, the input unit 22 is a touch panel that receives touch operations on the display screen of the display unit 21 and is integrally configured with the display unit 21. The input unit 22 outputs an operation signal based on the received operation to the control unit 26.

[0034] The speaker 23 outputs audio data generated based on program processing executed under the control of the control unit 26. In addition, the speaker 23 outputs an alarm sound based on emergency information received from the private network NW under the control of the control unit 26.

[0035] The communication unit 24 is configured to include a communication device for controlling wireless communication. For example, the communication unit 24 functions as a receiving unit that receives various information transmitted from the base station 10 by being connected to the base station 10 for communication. In addition, the communication unit 24 functions as a transmitting unit that transmits various information to the base station 10 by being connected to the base station 10 for communication.

[0036] In addition, the communication unit 24 can receive emergency information sent from the base station 10, regardless of whether there is a communication connection with the base station 10, as long as it is within the communication range of the base station 10. For example, the communication unit 24 receives emergency information (message ID) associated with a network identifier from a base station 10 that is in communication connection or a base station 10 that is not in communication connection but is within the communication range. The communication unit 24 sends the received emergency information (message ID) and the network identifier to the control unit 26.

[0037] The memory 25 is configured to include a RAM (Random Access Memory), a ROM (Read-Only Memory), a flash ROM, etc. For example, the storage unit 25 stores various programs such as an OS (Operating System) and applications, and various data acquired by running the programs. In addition, the storage unit 25 may also be configured to include a HDD (Hard Disk Drive) or an SSD (Solid State Drive), etc.

[0038] The control unit 26 is configured to include a processor such as a CPU (Central Processing Unit), and controls each unit included in the terminal 20 and performs various processes by executing a program stored in the storage unit 25 .

[0039] For example, when the communication unit 24 receives emergency information from the base station 10 , the control unit 26 notifies only the emergency information received from the private network NW to which the terminal 20 is communicatively connected, based on the network identifier associated with the emergency information.

[0040] Specifically, the control unit 26 obtains the network identifier of the self-operated network NW to which the communication unit 24 is connected during the communication connection or during the communication connection, and stores and maintains the obtained network identifier in the storage unit 25. Then, when the communication unit 24 receives emergency information (message ID), the control unit 26 compares the network identifier associated with the message ID with the network identifier of the self-operated network NW maintained to determine whether it is a message ID received from the self-operated network NW to which the terminal 20 is connected. For example, based on the network identifier associated with the message ID, when the control unit 26 determines that the message ID is received from the self-operated network NW to which the terminal 20 is connected, the emergency information based on the received message ID is used as the notification object.

[0041] On the other hand, when the control unit 26 receives a message ID from another self-operated network NW different from the self-operated network NW to which the terminal 20 is connected for communication, the control unit 26 excludes the emergency information based on the received message ID from the notification object. For example, when the control unit 26 receives a message ID from another self-operated network NW different from the self-operated network NW to which the terminal 20 is connected for communication, the control unit 26 excludes the emergency information from the notification object by discarding the message ID.

[0042] In addition, the control unit 26 excludes the same emergency information (message ID) from the notification object for a certain period of time by performing duplicate detection of the message ID, even if the message ID is sent from the self-operated network NW to which the terminal 20 is connected for communication. For example, within a certain period of time after notifying the emergency information based on the message ID received from the self-operated network NW to which the terminal 20 is connected for communication, the control unit 26 detects that the message ID is duplicated and excludes it from the notification object even if the same message ID is received from the self-operated network NW.

[0043] Furthermore, when the control unit 26 receives a message ID from another self-operated network NW different from the self-operated network NW to which the terminal 20 is connected for communication, the control unit 26 excludes emergency information from the notification object by, for example, discarding the received message ID, so that even if the message ID is received from the self-operated network NW to which the terminal 20 is connected for communication thereafter, it is not detected as a duplicate. That is, regardless of the time that has passed thereafter, when the control unit 26 receives a message ID from the self-operated network NW to which the terminal 20 is connected for communication, even if the received message ID is the same as the message ID received via another self-operated network NW, it is also treated as a notification object.

[0044] The control unit 26 notifies the user of the emergency information by causing the display unit 21 to display information based on the emergency information to be notified, or causing the speaker 23 to output an alarm sound based on the emergency information. Figure 1 and Figure 2The terminal 20-1b shown in the figure, when receiving the message ID "A000" from the private network NW1 (base station 10-1), notifies (e.g. displays) emergency information related to "fire" based on the received message ID. On the other hand, even if the terminal 20-1b receives the message ID "A000" from the private network NW2 (base station 10-2), it discards the received message and excludes it from the notification object.

[0045] [Notification of emergency information] Next, refer to Figure 5 , the operation of the notification processing of emergency information in the network system SYS is described. Figure 5 is a flowchart showing an example of the notification process of emergency information involved in this embodiment. Figure 1 The network system SYS shown in the figure is used as an example for explanation. Figure 1 As shown, the terminal 20-1a and the terminal 20-1b are connected to the private network NW1 (base station 10-1) for communication. In addition, the terminal 20-2 is connected to the private network NW2 (base station 10-2) for communication. Moreover, since the terminal 20-1b is close to the private network NW2, it can sometimes receive emergency information from the private network NW2.

[0046] (Step S101) When a child is missing, the private network NW2 broadcasts emergency information indicating that a child is missing. Specifically, the private network NW2 transmits the message ID "A000" indicating that a child is missing in association with the network identifier "β".

[0047] (Step S103) The terminal 20-2 receives the emergency information (message ID "A000") associated with the network identifier "β" from the private network NW2.

[0048] (Step S105) Terminal 20-2 compares the network identifier associated with the received emergency information (message ID "A000") and confirms that it is the same "β" as the network identifier of the self-operated network NW2 to which it is communicating. Terminal 20-2 uses the received emergency information (message ID "A000") as the notification object and proceeds to step S107.

[0049] (Step S107) The terminal 20-2 displays "Child missing" on the display unit 21 as emergency information based on the message ID "A000" through processing by the application.

[0050] (Step S109) When the emergency information broadcasted from the self-operated network NW2 in step S101 arrives by leakage waves or the like, the terminal 20-1b receives the emergency information associated with the network identifier "β" from the self-operated network NW2.

[0051] (Step S111) The terminal 20-1b compares the network identifier associated with the received emergency information (message ID "A000") and confirms that it is different from the network identifier "α" of the private network NW1 to which it is communicating. The terminal 20-1b discards the received emergency information (message ID "A000") and excludes it from the notification target.

[0052] (Step S113) When a fire occurs, the private network NW1 broadcasts emergency information indicating the fire. Specifically, the private network NW1 associates the network identifier "α" with the message ID "A000" indicating the fire and transmits it.

[0053] (Step S115) The terminal 20-1a receives the emergency information (message ID "A000") associated with the network identifier "α" from the private network NW1.

[0054] (Step S117) The terminal 20-1a compares the network identifier associated with the received emergency information (message ID "A000") and confirms that it is the same "α" as the network identifier of the self-operated network NW1 to which it is communicating. The terminal 20-1a uses the received emergency information (message ID "A000") as the notification object and proceeds to step S119.

[0055] (Step S119) The terminal 20-1a displays "fire outbreak" on the display unit 21 as emergency information based on the message ID "A000" through processing by the application.

[0056] (Step S121) Also, similarly to the terminal 20-1a, the terminal 20-1b receives emergency information (message ID "A000") associated with the network identifier "α" from the private network NW1.

[0057] (Step S123) Terminal 20-1b compares the network identifier associated with the received emergency information (message ID "A000") and confirms that it is the same "α" as the network identifier of the self-operated network NW1 to which it is communicating. Terminal 20-1b uses the received emergency information (message ID "A000") as the notification object and proceeds to step S125.

[0058] (Step S125) The terminal 20-1b displays "Fire Occurrence" as emergency information based on the message ID "A000" on the display unit 21 through application processing. In addition, the terminal 20-1b has already received the same message ID "A000" in step S109, but since it is discarded in step S111, it is not detected as a duplicate and can be displayed.

[0059] As described above, the network system SYS involved in this embodiment includes a base station 10 of a self-operated network in each of a plurality of self-operated networks NW (an example of a network), and a terminal 20 that can be connected to any one of the plurality of self-operated networks NW through wireless communication, and a network identifier (an example of first identification information) that can identify each of the plurality of self-operated networks NW is pre-set. The base station 10 sends emergency information to the terminal 20 that exists within the range of its own wireless communication in a manner that can be received regardless of whether there is a communication connection, and the emergency information is associated with the network identifier set in the self-operated network NW to which the base station 10 is connected. The terminal 20 receives the emergency information associated with the network identifier from the base station 10. In addition, when the terminal 20 receives the emergency information, it only uses the emergency information received from the self-operated network NW to which the terminal 20 is connected as the notification object based on the network identifier associated with the received emergency information.

[0060] Thus, when the network system SYS releases emergency information in a plurality of self-operated networks NW, it is possible to notify only the emergency information from the self-operated network (own network) to which the terminal 20 is communicatively connected, based on the network identifier associated with the emergency information. Therefore, the network system SYS can appropriately notify the emergency information from the self-operated network (own network) to which the terminal 20 is communicatively connected.

[0061] For example, multiple message IDs (an example of the second identification information) that can be associated with the content of each emergency information are specified, and each of the multiple message IDs and each of the contents of the emergency information are pre-associated in each of the multiple self-operated networks NW. The base station 10 sends information including the message ID as emergency information. When the terminal 20 receives the message ID, based on the network identifier associated with the message ID, only the emergency information based on the message ID received from the self-operated network NW to which the terminal 20 is connected for communication is notified.

[0062] Thus, when the network system SYS uses the message ID specified for each content of the emergency information in each of the plurality of self-operated networks NW to publish the emergency information, it is possible to notify only the emergency information from the self-operated network (own network) to which the terminal 20 is connected for communication based on the network identifier associated with the message ID. Therefore, the network system SYS can appropriately notify the emergency information from the self-operated network (own network) to which the terminal 20 is connected for communication.

[0063] Furthermore, within a certain period of time after the terminal 20 notifies the emergency information based on the message ID received from the private network NW to which the terminal 20 is communicatively connected, even if the terminal 20 receives the same message ID from the private network NW to which the terminal 20 is communicatively connected, the terminal 20 is excluded from being notified of the emergency information.

[0064] Therefore, even if the network system SYS receives the same emergency information multiple times from the private network NW to which the terminal 20 is communicatively connected within a certain period of time, it will not detect it as a duplication and notify the emergency information each time, so that the emergency information from the private network (private network) to which the terminal 20 is communicatively connected can be properly notified.

[0065] In addition, when the terminal 20 receives a message ID from another self-operated network NW that is different from the self-operated network NW to which the terminal 20 is connected for communication, the emergency information based on the message ID is excluded from the notification object. Regardless of the time that has passed thereafter, when the terminal 20 receives a message ID from the self-operated network NW to which the terminal 20 is connected for communication, even if the received message ID is the same as the message ID received via other self-operated networks NW, the emergency information based on the message ID will be treated as the notification object.

[0066] As a result, the network system SYS will not mistakenly notify emergency information from other self-operated networks NW to which the terminal 20 is not communicatively connected, and will not mistakenly exclude emergency information from the self-operated network NW to which the terminal 20 is communicatively connected from the notification object due to duplicate detection. Therefore, the network system SYS can appropriately notify emergency information from the self-operated network (its own network) to which the terminal 20 is communicatively connected.

[0067] For example, when the terminal 20 receives a message ID from another private network NW different from the private network NW to which the terminal 20 is communicatively connected, the terminal 20 discards the message ID to exclude emergency information based on the message ID from notification targets.

[0068] This allows the network system SYS to prevent the terminal 20 from erroneously notifying the terminal 20 of emergency information from other private networks NW to which the terminal 20 is not communicatively connected.

[0069] For example, the network identifier is identification information of the base station 10 included in each of the plurality of private networks NW.

[0070] Thus, the network system SYS can identify the private network NW that is the transmission source of the emergency information using the identification information of the base station 10 .

[0071] For example, the network identifier may be identification information of a core network included in each of the plurality of self-operated networks NW. The core network refers to a communication network corresponding to a core portion of the self-operated network NW, and includes, for example, the AMF 32 and the CBCF 31 .

[0072] Thereby, the network system SYS can identify the private network NW which is the transmission source of the emergency information using the identification information of the core network.

[0073] In addition, the network identifier is included in a system information block (SIB) for reporting emergency information.

[0074] Thus, when the network system SYS distributes emergency information in the private network NW, it can associate and transmit the identification information of the distribution source using the system information block. Therefore, the terminal 20 that receives the emergency information can identify the private network NW that is the transmission source of the received emergency information.

[0075] In addition, the method for notifying emergency information in the network system SYS involved in the present embodiment includes: a step in which the base station 10 sends the emergency information to the terminal 20 that exists within the range of its own wireless communication in a manner that can be received regardless of whether there is a communication connection, and the emergency information is associated with a network identifier set in the self-operated network NW to which the base station 10 is connected for communication; a step in which the terminal 20 receives the emergency information associated with the network identifier from the base station 10; and a step in which, when the emergency information is received, only the emergency information received from the self-operated network NW to which the terminal 20 is connected for communication is used as the notification object based on the network identifier associated with the emergency information.

[0076] Thus, when the network system SYS releases emergency information in a plurality of self-operated networks NW, it is possible to notify only the emergency information from the self-operated network (own network) to which the terminal 20 is communicatively connected, based on the network identifier associated with the emergency information. Therefore, the network system SYS can appropriately notify the emergency information from the self-operated network (own network) to which the terminal 20 is communicatively connected.

[0077] In addition, the terminal 20 involved in this embodiment can communicate and connect with any one of the base stations 10 in each of a plurality of self-operated networks NW (an example of a network) through wireless communication. In addition, a network identifier (an example of first identification information) that can identify each of the plurality of self-operated networks NW is pre-set. Regardless of whether the terminal 20 has a communication connection with the base station 10, when it is within the range of wireless communication of the base station 10, it receives emergency information associated with the network identifier from the base station 10. In addition, when the terminal 20 receives emergency information, based on the network identifier associated with the emergency information, only the emergency information received from the self-operated network NW to which the terminal 20 is connected in communication is used as a notification object.

[0078] Thus, when the terminal 20 releases emergency information in a plurality of self-operated networks NW, it is possible to notify only the emergency information from the self-operated network (own network) to which the terminal 20 is connected for communication based on the network identifier associated with the emergency information. Therefore, the terminal 20 can appropriately notify the emergency information from the self-operated network (own network) to which the terminal 20 is connected for communication.

[0079] In addition, the method for notifying emergency information in the terminal 20 involved in the present embodiment includes: a step of receiving emergency information associated with a network identifier (an example of first identification information) from the base station 10 when the terminal 20 is within the wireless communication area of ​​the base station 10 regardless of whether the terminal 20 has a communication connection with the base station 10; and a step of, when the emergency information is received, only the emergency information received from the self-operated network NW to which the terminal 20 is connected for communication as the notification object based on the network identifier associated with the emergency information.

[0080] Thus, when the terminal 20 releases emergency information in a plurality of self-operated networks NW, it is possible to notify only the emergency information from the self-operated network (own network) to which the terminal 20 is connected for communication based on the network identifier associated with the emergency information. Therefore, the terminal 20 can appropriately notify the emergency information from the self-operated network (own network) to which the terminal 20 is connected for communication.

[0081] In addition, in the present embodiment, the terminal 20 discards the emergency information (message ID) received from other private networks NW (for example, Figure 5 Step S111), but it can also be excluded from the communication object without discarding it. For example, the terminal 20 may not discard the emergency information (message ID) received from other self-operated networks NW, and not display the emergency information and output the notification sound. In addition, the terminal 20 may not discard the emergency information (message ID) received from other self-operated networks NW, but display it as emergency information other than the self-operated network NW to which the terminal 20 is connected for communication. In addition, when the terminal 20 performs duplicate detection of the emergency information (message ID) received from the self-operated network NW to which the terminal 20 is connected for communication, even if the emergency information (message ID) received from other self-operated networks NW is not discarded, it is possible to perform duplicate detection only on the emergency information (message ID) received from the self-operated network NW by confirming the network identifier.

[0082] <Second Embodiment> Hereinafter, a second embodiment of the present invention will be described. In the first embodiment, a network identifier is assigned to a system information block (SIB) as identification information for identifying each network NW. In this embodiment, an example is described in which identification information for identifying each network NW is recorded in a Secondary Notification of ETWS.

[0083] In the Secondary Notification of ETWS of SIB7, the main text can be set. In a privately operated self-operated network NW, it is considered unrealistic to edit the main text each time, so it is assumed that the ETWSPrimary Notification (main notification) of SIB6 without a main text is mainly used. Therefore, the CBCF31 involved in this embodiment records the identification information for identifying each self-operated network NW in the main text of the Secondary Notification of ETWS, thereby sending the message ID and the network identification information in association with each other. In this way, it is possible to distinguish which self-operated network NW the message ID comes from. The base station 10 receives the message ID and the network identification information sent from the CBCF31 via the AMF32, and sends them to the terminal 20.

[0084] When receiving emergency information (message ID), the terminal 20 can confirm which self-operated network NW it is issued from by confirming the text of the Secondary Notification of ETWS, and only the emergency information (message ID) received from the self-operated network NW to which the terminal 20 is connected is used as the notification object. In addition, when receiving emergency information with the same message ID, the terminal 20 can correctly perform duplicate detection by confirming the text of the Secondary Notification of ETWS.

[0085] Here, as identification information for identifying each operating network NW, for example, it may be a network name, or it may be a network identifier for identifying the base station 10 or the core network as in the first embodiment. The network name may be, for example, an access point name (APN: Access Point Name), and may also be encrypted. Here, as identification information for identifying each operating network NW, an example of recording a network name in the body of the Secondary Notification of ETWS is described.

[0086] Figure 6 is a flowchart showing an example of the notification process of emergency information involved in this embodiment. Figure 5 The notification process of emergency information shown is similar to that of Figure 1 The network system SYS shown in FIG. 1 is used as an example for explanation, but the difference is that a network name is used instead of a network identifier. In addition, the network name of the private network NW1 is set to "NW1", and the network name of the private network NW2 is set to "NW2".

[0087] (Step S201) When a child is missing, the self-operated network NW2 broadcasts emergency information indicating that a child is missing. Specifically, when the self-operated network NW2 sends the message ID "A000" indicating that a child is missing, the network name "NW2" is recorded in the body of the Secondary Notification of the ETWS and sent. That is, the self-operated network NW2 associates the network name "NW2" with the message ID "A000" indicating that a child is missing and sends it.

[0088] (Step S203) The terminal 20-2 receives emergency information (message ID "A000") associated with the network name "NW2" from the private network NW2.

[0089] (Step S205) Terminal 20-2 confirms the text of the Secondary Notification of ETWS, and confirms that the network name associated with the received emergency information (message ID "A000") is the network name "NW2" of the self-operated network NW2 to which it is communicating. Terminal 20-2 uses the received emergency information (message ID "A000") as the notification object and proceeds to step S207.

[0090] (Step S207) The terminal 20-2 displays "Child missing" on the display unit 21 as emergency information based on the message ID "A000" through processing by the application.

[0091] (Step S209) When the emergency information broadcasted from the private network NW2 in step S201 arrives through the leakage radio wave, the terminal 20-1b receives the emergency information associated with the network name "NW2" from the private network NW2.

[0092] (Step S211) The terminal 20-1b checks the text of the Secondary Notification of the ETWS, and confirms that the network name associated with the received emergency information (message ID "A000") is different from the network identifier "NW1" of the private network NW1 to which the terminal 20-1b is communicating. The terminal 20-1b discards the received emergency information (message ID "A000") and excludes it from the notification target.

[0093] (Step S213) When a fire occurs, the self-operated network NW1 broadcasts emergency information indicating the fire. Specifically, when the self-operated network NW2 sends the message ID "A000" indicating the fire, it records the network name "NW1" in the body of the Secondary Notification of the ETWS and sends it. That is, the self-operated network NW1 associates the network name "NW1" with the message ID "A000" indicating the fire and sends it.

[0094] (Step S215) The terminal 20-1a receives the emergency information (message ID "A000") associated with the network name "NW1" from the private network NW1.

[0095] (Step S217) Terminal 20-1a confirms the text of the Secondary Notification of ETWS, and confirms that the network name associated with the received emergency information (message ID "A000") is "NW1", which is the same as the network name of the self-operated network NW1 to which it is communicating. Terminal 20-1a uses the received emergency information (message ID "A000") as the notification object and proceeds to step S219.

[0096] (Step S219) The terminal 20-1a displays "fire outbreak" on the display unit 21 as emergency information based on the message ID "A000" through processing by the application.

[0097] (Step S221) Also, similarly to the terminal 20-1a, the terminal 20-1b receives emergency information (message ID "A000") associated with the network name "NW1" from the private network NW1.

[0098] (Step S223) Terminal 20-1b confirms the text of the Secondary Notification of ETWS, and confirms that the network name associated with the received emergency information (message ID "A000") is "NW1", which is the same as the network name of the self-operated network NW1 to which it is communicating. Terminal 20-1b uses the received emergency information (message ID "A000") as the notification object and proceeds to step S225.

[0099] (Step S225) The terminal 20-1b displays "Fire Occurrence" as emergency information based on the message ID "A000" on the display unit 21 through application processing. In addition, the terminal 20-1b has already received the same message ID "A000" in step S209, but since it is discarded in step S211, it is not detected as a duplicate and can be displayed.

[0100] As described above, in this embodiment, the network identifier is included in the Secondary Notification of ETWS.

[0101] Thus, when the network system SYS issues emergency information in the private network NW, it can associate and send the identification information of the issuer using the SecondaryNotification of ETWS. Therefore, the terminal 20 that receives the emergency information can identify the private network NW that is the source of the received emergency information.

[0102] In addition, in the present embodiment, the terminal 20 discards the emergency information (message ID) received from other private networks NW (for example, Figure 6 Step S211), but it can also be excluded from the communication object without discarding it. For example, the terminal 20 may not discard the emergency information (message ID) received from other self-operated networks NW, and not display the emergency information and output the notification sound, etc. In addition, the terminal 20 may not discard the emergency information (message ID) received from other self-operated networks NW, but display it as emergency information other than the self-operated network NW to which the terminal 20 is connected for communication. In addition, when the terminal 20 performs duplicate detection of the emergency information (message ID) received from the self-operated network NW to which the terminal 20 is connected for communication, even if the emergency information (message ID) received from other self-operated networks NW is not discarded, it is possible to perform duplicate detection only on the emergency information (message ID) received from the self-operated network NW by confirming the body of the SecondaryNotification of ETWS (e.g., the network name).

[0103] <Third Embodiment> Next, a third embodiment of the present invention will be described. In this embodiment, a priority is set for each emergency message (message ID) in each self-operated network NW, and the priority is used to identify which self-operated network NW the emergency message (message ID) is sent from. The priority of the emergency message is equivalent to the order of priority of notification to the user, for example, priority "1" is the highest priority, and as the value of "2", "3" ... increases, the priority decreases.

[0104] Figure 7 This is a diagram showing an example of the priority of emergency information set in the self-operated network NW of the present embodiment. In the example shown in the figure, in the self-operated network NW1, the priority of the message ID "A000" indicating a fire is set to "1", the priority of the message ID "A001" indicating an earthquake is set to "1", the priority of the message ID "A002" indicating a tsunami is set to "1", and the priority of the message ID "A003" indicating suspicious person information is set to "2". In addition, in the self-operated network NW2, the priority of the message ID "A000" indicating a child missing is set to "3", the priority of the message ID "A001" indicating a heat stroke warning is set to "4", the priority of the message ID "A002" indicating a traffic jam is set to "4", and the priority of the message ID "A003" indicating an earthquake is set to "1".

[0105] In this way, since the association between the content of the emergency information and the message ID is set separately in each self-operated network NW, even if the message ID is the same, the content and priority of the emergency information are likely to be different. Therefore, the terminal 20 can identify whether it is a message ID sent from the self-operated network NW to which the terminal 20 is connected by comparing the priority.

[0106] For example, when sending emergency information (message ID), CBCF31 assigns priority to the system information block (SIB) and sends the message ID and priority in association. In addition, CBCF31 can also assign priority to the body of the SecondaryNotification of ETWS and send the message ID and priority in association. The base station 10 receives the message ID and priority sent from CBCF31 via AMF32 and sends it to the terminal 20.

[0107] When the terminal 20 receives the message ID, it uses the priority associated with the received message ID as the identification information of the self-operated network NW. Only when the priority associated with the received message ID is consistent with the priority set in the self-operated network NW to which the terminal 20 is connected, the emergency information based on the message ID will be used as the notification object.

[0108] Figure 8 is a flowchart showing an example of the notification process of emergency information involved in this embodiment. Figure 5 and Figure 6 The notification process of emergency information shown is similar to that of Figure 1 The network system SYS shown is used as an example for explanation, but the difference is that priorities are used instead of network identifiers.

[0109] (Step S301) When a child is missing, the private network NW2 broadcasts emergency information indicating that a child is missing. Specifically, the private network NW2 transmits the message ID "A000" indicating that a child is missing in association with the priority "3".

[0110] (Step S303) The terminal 20-2 receives emergency information (message ID "A000") associated with the priority "3" from the private network NW2.

[0111] (Step S305) Terminal 20-2 compares the priority associated with the received emergency information (message ID "A000") and confirms that it is "3", which is the same as the priority of message ID "A000" in the self-operated network NW2 to which it is communicating. Terminal 20-2 uses the received emergency information (message ID "A000") as the notification object and proceeds to step S307.

[0112] (Step S307) The terminal 20-2 displays "Child missing occurrence" on the display unit 21 with priority "3" through processing of the application.

[0113] (Step S309) When the emergency information broadcasted from the private network NW2 in step S301 arrives through the leakage radio wave, the terminal 20-1b receives the emergency information (message ID "A000") associated with the priority "3" from the private network NW2.

[0114] (Step S311) The terminal 20-1b checks the priority associated with the received emergency information (message ID "A000") and confirms that it is "1", which is the same as the priority of the message ID "A000" in the private network NW1 to which it is communicating. The terminal 20-1b discards the received emergency information (message ID "A000") and excludes it from the notification object.

[0115] (Step S313) When a fire occurs, the private network NW1 broadcasts emergency information indicating the fire. Specifically, the private network NW1 transmits the message ID "A000" indicating the fire in association with the priority "1".

[0116] (Step S315) The terminal 20-1a receives the emergency information (message ID "A000") associated with the priority "1" from the private network NW1.

[0117] (Step S317) The terminal 20-1a compares the priority associated with the received emergency information (message ID "A000") and confirms that it is "1", which is the same as the priority of the message ID "A000" in the self-operated network NW1 to which it is communicating. The terminal 20-1a uses the received emergency information (message ID "A000") as the notification object and proceeds to step S319.

[0118] (Step S319) The terminal 20-1a displays "fire outbreak" as emergency information based on the message ID "A000" at a priority level "1" on the display unit 21 through processing by the application.

[0119] (Step S321) Also, similarly to the terminal 20-1a, the terminal 20-1b receives emergency information (message ID "A000") associated with the priority "1" from the private network NW1.

[0120] (Step S323) Terminal 20-1a compares the priority associated with the received emergency information (message ID "A000") and confirms that it is "1", which is the same as the priority of message ID "A000" in the self-operated network NW1 to which it is communicating. Terminal 20-1b uses the received emergency information (message ID "A000") as the notification object and proceeds to step S325.

[0121] (Step S325) The terminal 20-1a displays "fire has occurred" as emergency information based on the message ID "A000" with a priority of "1" on the display unit 21 through processing by the application. In addition, the terminal 20-1b has already received the same message ID "A000" in step S309, but since it is discarded in step S311, it is not detected as a duplicate and can be displayed.

[0122] In addition, in the present embodiment, the terminal 20 discards the emergency information (message ID) received from other private networks NW (for example, Figure 8 Step S311), but it can also be excluded from the communication object without discarding it. For example, the terminal 20 may not discard the emergency information (message ID) received from other self-operated networks NW, and not display the emergency information and output the notification sound. In addition, the terminal 20 may not discard the emergency information (message ID) received from other self-operated networks NW, but display it as emergency information other than the self-operated network NW to which the terminal 20 is connected for communication. In addition, when the terminal 20 performs duplicate detection of the emergency information (message ID) received from the self-operated network NW to which the terminal 20 is connected for communication, even if the emergency information (message ID) received from other self-operated networks NW is not discarded, it is possible to perform duplicate detection only on the emergency information (message ID) received from the self-operated network NW by confirming the priority.

[0123] In addition, for example, Figure 8 In the process shown, the terminal 20-1b can display "fire has occurred" on the display unit 21 in step S325, based on the emergency information (message ID) received from the other self-operated network NW2 in step S309, because the priority of the emergency information (message ID) received from the self-operated network NW1 to which the terminal 20-1b is connected in communication in step S321 is high, even if the message ID is the same (even if duplication is detected). In this way, when duplication detection of the same message ID is performed, if the priority is high, it is used as the notification object, thereby preventing the omission of notification of information with high urgency.

[0124] At this time, the terminal 20-1b may discard the emergency information (message ID) received from other self-operated networks NW2 in step S309 and exclude it from the notification object, or may exclude it from the notification object without discarding it. In addition, the terminal 20-1b may not discard the emergency information (message ID) received from other self-operated networks NW2 in step S309, but display it as emergency information other than the self-operated network NW1 to which the terminal 20-1b is connected for communication.

[0125] Next, the notification method of the emergency information corresponding to the priority is described. When the terminal 20 receives the emergency information (message ID), based on the priority associated with the emergency information (message ID), the emergency information based on the message ID is notified. For example, when the terminal 20 receives the emergency information (message ID), based on the priority associated with the emergency information (message ID), the emergency information based on the message ID with a high priority is notified first.

[0126] As an example, when the terminal 20 displays multiple emergency messages in a list in the order of reception, the emergency messages with high priority may be displayed at the beginning of the list (e.g., the top layer) regardless of the order of reception. In addition, as another example, the terminal 20 may display the emergency messages with high priority larger than the emergency messages with low priority, or may not display the emergency messages with low priority while displaying the emergency messages with high priority. Thus, it is possible to prevent the information with high priority (urgency) from being buried by the information with low priority (urgency) received later.

[0127] Furthermore, the terminal 20 may not preferentially display the emergency information with a high priority, but may simply display the priority in association with the emergency information so that the user can recognize the priority (urgency).

[0128] As described above, in this embodiment, for a plurality of self-operated networks NW, the priority of each message ID is set according to the content of the emergency information. When the base station 10 sends information including the message ID as emergency information, it sends it in association with the priority set in the message ID. When the terminal 20 receives the message ID, it uses the priority associated with the received message ID as the identification information of the self-operated network NW, and only when the priority associated with the received message ID is consistent with the priority set in the self-operated network NW to which the terminal 20 is connected in communication, the emergency information based on the message ID is used as the notification object.

[0129] Thus, when the network system SYS releases emergency information in a plurality of self-operated networks NW, it is possible to utilize the priority of the emergency information and notify only the emergency information from the self-operated network (own network) to which the terminal 20 is connected for communication. Therefore, the network system SYS can appropriately notify the emergency information from the self-operated network (own network) to which the terminal 20 is connected for communication.

[0130] Furthermore, when receiving the message ID, the terminal 20 notifies the emergency information based on the message ID based on the priority level associated with the message ID.

[0131] Thus, in the network system SYS, the terminal 20 can appropriately notify the emergency information from the private network (own network) to which the terminal 20 is communicatively connected according to the priority.

[0132] For example, when receiving a message ID, the terminal 20 preferentially notifies the emergency information based on the message ID having a high priority based on the priority associated with the message ID.

[0133] Thus, in the network system SYS, the terminal 20 can suppress omission of notification of information with high urgency. For example, the terminal 20 can also prevent information with high priority (urgency) from being buried by information with low priority (urgency) received later.

[0134] The embodiments of the present invention are described in detail above with reference to the drawings, but the specific structure is not limited to the above embodiments, and also includes designs that do not deviate from the scope of the present invention. For example, the various structures described in the above embodiments can be arbitrarily combined.

[0135] In addition, as described in the above-mentioned embodiments, as long as the network identifier, network name, priority of each emergency information (message ID), etc. can be used to identify that the emergency information is published from its own proprietary network NW, the device that receives the specific message ID published on the proprietary network NW can also perform specific control. Thus, by publishing emergency information of a specific message ID from the self-operated network NW, it is also possible to perform control such as emergency stop of the equipment that receives the message ID. For example, by publishing the message ID of emergency information when an earthquake occurs, the equipment in the factory that receives the message ID can be emergency stopped, or by publishing the message ID of emergency information of human intrusion detection to a specific area (such as a machine operation area), the machine in the area that receives the message ID can be emergency stopped. In addition, by publishing the message ID of emergency information of gas leak detection, the gas pipe valve that receives the message ID can be closed, or by publishing the message ID of emergency information when a fire occurs, the sprinkler that receives the message ID can be operated.

[0136] In this way, if the method of using emergency information is used, not only the equipment that is connected to the self-operated network NW, but also the equipment that is not connected to the self-operated network NW can be stopped by radio waves. Originally, it has the disadvantage that it consumes communication resources when the communication connection is made without the need for the self-operated network NW, so it is advantageous in terms of effective use of resources. In addition to the emergency stop of the equipment, it can also be used as a trigger for certain actions. For example, even when the warning light is turned on, the surveillance camera is in action, and the in-hall broadcast during the heavy rain alarm, it can be controlled to make a specific device perform a specific action.

[0137] In addition, at least a part of each device communicating in the above-mentioned network system SYS may also have a computer system inside it. In addition, a program for realizing the functions of each component possessed by each device communicating in the above-mentioned network system SYS may also be recorded in a computer-readable recording medium, and the computer system is made to read and execute the program recorded in the recording medium, thereby performing processing in each component possessed by each device communicating in the above-mentioned network system SYS. Here, "making the computer system read and execute the program recorded in the recording medium" includes: installing the program in the computer system. In addition, the "computer system" referred to here includes hardware such as OS and peripheral devices. In addition, the "computer system" may include multiple computer devices connected via a network, and the network includes communication lines such as the Internet, WAN, LAN, and dedicated lines. In addition, "computer-readable storage medium" refers to portable media such as floppy disks, magneto-optical disks, ROMs, CD-ROMs, and storage devices such as hard disks built into computer systems. In this way, the recording medium storing the program may also be a non-temporary recording medium such as a CD-ROM.

[0138] In addition, the recording medium also includes an internal or external recording medium that can be accessed from a publishing server in order to publish the program. In addition, the program is divided into multiple parts, and after being downloaded at different time intervals, the structure of the combination of each component possessed by each device that communicates in the network system SYS and the distribution server that distributes each divided program may also be different. Furthermore, the "computer-readable recording medium" also includes a medium that keeps the program for a certain period of time, such as a volatile memory (RAM) inside a computer system that becomes a server or client when sending a program via a network. In addition, the above-mentioned program may also be a program for realizing a part of the above-mentioned functions. Furthermore, it may also be a so-called differential file (differential program) that can realize the above-mentioned functions by combining with a program already recorded in the computer system.

[0139] In addition, part or all of the functions of each device communicating in the network system SYS in the above-mentioned embodiment may be implemented as an integrated circuit such as LSI (Large Scale Integration). Each function may be individually processor-based, or part or all may be integrated and processor-based. In addition, the method of integrated circuitization is not limited to LSI, and may also be implemented by a dedicated circuit or a general-purpose processor. In addition, in the case where an integrated circuit technology that replaces LSI appears due to the advancement of semiconductor technology, an integrated circuit based on the technology may also be used.

Claims

1. A network system comprising a base station in each of a plurality of networks; and a terminal capable of communicating with any one of the plurality of networks via wireless communication, wherein the network system is characterized in that: First identification information capable of identifying each of the plurality of networks is preset. The base station transmits the emergency information to the terminal existing in the wireless communication range of the base station in a manner that the terminal can receive the emergency information regardless of whether the communication connection exists, and the emergency information is associated with the first identification information set in the network to which the base station is connected for communication. The terminal comprises: a receiving unit, receiving an emergency unit associated with the first identification information from the base station; as well as A control unit that, when the receiving unit receives the emergency information, sets only the emergency information received from the network to which the terminal is communicatively connected as a notification target based on the first identification information associated with the emergency information.

2. The network system according to claim 1, characterized in that: A plurality of second identification information that can be associated with each content of the emergency information is specified, Each of the plurality of second identification information and each of the contents of the emergency information is pre-associated with each of the plurality of networks, The base station sends information including the second identification information as the emergency information, When receiving the second identification information, the control unit notifies only the emergency information based on the second identification information received from the network to which the terminal is communicatively connected, based on the first identification information associated with the second identification information.

3. The network system according to claim 2, characterized in that: The control unit excludes the terminal from notification of the emergency information even if the same second identification information is received from the network to which the terminal is communicatively connected within a certain period of time after notifying the emergency information based on the second identification information received from the network to which the terminal is communicatively connected.

4. The network system according to claim 2 or 3, characterized in that: When the control unit receives the second identification information from another network different from the network to which the terminal is connected for communication, the control unit excludes the emergency information based on the second identification information from the notification object, and when the second identification information is received from the network to which the terminal is connected for communication regardless of the subsequent elapsed time, the control unit also treats the emergency information as a notification object even if the received second identification information is the same as the second identification information received via the other network.

5. The network system according to claim 4, characterized in that: The control unit excludes the emergency information from notification targets by discarding the second identification information when the second identification information is received from another network different from the terminal communication connection network.

6. The network system according to claim 1, characterized in that: The first identification information is identification information of the base station included in each of a plurality of networks.

7. The network system according to claim 1, characterized in that: The first identification information is identification information of a core network included in each of the plurality of networks.

8. The network system according to claim 1, characterized in that: The first identification information is included in a system information block for reporting the emergency information.

9. The network system according to claim 1, characterized in that: In a case where the emergency information is based on an Earthquake and Tsunami Warning System (ETWS), the first identification information is included in a secondary notification of the ETWS.

10. The network system according to claim 2, characterized in that: For each of the plurality of networks, setting a priority of each second identification information according to the content of the emergency information, When the base station transmits information including the second identification information as the emergency information, the base station transmits the information in association with the priority set for the second identification information. When the terminal receives the second identification information, the terminal uses the priority associated with the received second identification information as the first identification information, and uses the emergency information as a notification object only when the priority associated with the received second identification information is consistent with the priority set in the network to which the terminal is connected for communication.

11. The network system according to claim 10, characterized in that: When the terminal receives the second identification information, the terminal notifies the emergency information based on the second identification information based on the priority associated with the second identification information.

12. The network system according to claim 11, characterized in that: When the terminal receives the second identification information, based on the priority associated with the second identification information, it preferentially notifies the emergency information based on the second identification information with a higher priority.

13. A terminal capable of communicating with any one of base stations in each of a plurality of networks through wireless communication, wherein: First identification information capable of identifying each of the plurality of networks is preset. The terminal comprises: a receiving unit that receives emergency information associated with the first identification information from the base station when the receiving unit is within a wireless communication range of the base station regardless of whether or not there is a communication connection with the base station; and A control unit that, when the receiving unit receives the emergency information, sets only the emergency information received from the network to which the terminal is communicatively connected as a notification target based on the first identification information associated with the emergency information.

14. A notification method for emergency information in a network system including a base station and a terminal in each of a plurality of networks, wherein the terminal can be connected to any of the plurality of networks by wireless communication, characterized in that: The notification method includes: First identification information capable of identifying each of the plurality of networks is preset; The base station transmits emergency information to the terminal existing in the wireless communication range of the base station in a manner that the terminal can receive the emergency information regardless of whether there is a communication connection, wherein the emergency information is associated with the first identification information set in the network to which the base station is connected for communication; The terminal receives an emergency part associated with the first identification information from the base station; and A step of, when the emergency information is received, targeting notification of only the emergency information received from the network to which the terminal is communicatively connected, based on the first identification information associated with the emergency information.

15. A notification method for notifying emergency information in a terminal capable of communicating with any one of base stations in each of a plurality of networks through wireless communication, the notification method comprising: First identification information capable of identifying each of the plurality of networks is preset. The terminal receives emergency information associated with the first identification information from the base station when the terminal is within the wireless communication range of the base station regardless of whether the terminal has a communication connection with the base station; as well as A step of, when the emergency information is received, targeting notification of only the emergency information received from the network to which the terminal is communicatively connected, based on the first identification information associated with the emergency information.

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