Early warning message broadcasting method and system

Abstract

The invention discloses an early warning message broadcasting method and system. The method comprises the steps that an emergency broadcast request message sent by a cell broadcast entity is received, and the emergency broadcast request message at least comprises area identification information of an influence area of an emergent public event and public early warning information corresponding to the emergent public event; an early warning request message is sent to a non-ground network according to the emergency broadcast request message, the early warning request message is used for requesting the non-ground network to broadcast an early warning message bearing public early warning information to a target terminal in a disaster-affected area, and the disaster-affected area is an area where the ground network cannot provide communication service in the affected area; the target terminal is a terminal supporting receiving of the non-ground network broadcast message. According to the method and the device, the technical problem that the public early warning information of the emergent public event cannot be specifically broadcasted to more terminals in the related technology under the condition that the ground network is affected is solved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a method and system for broadcasting early warning messages. Background Technology

[0002] In the Public Warning System (PWS), the Terrestrial Network (TN) serves as the primary transmission channel for warning messages, sending public warning short messages to user equipment via Cell Broadcast (CB) technology.

[0003] However, in the face of emergencies such as natural disasters, accidents, or public security incidents, the vulnerability of terrestrial networks is exposed. Their infrastructure may be damaged, leading to the interruption of terrestrial communication services. Especially in extreme environments, such as disaster-stricken areas affected by earthquakes or floods, the coverage and broadcasting capabilities of terrestrial networks can be significantly reduced, or even completely fail. This makes it impossible to effectively broadcast early warning messages to a large number of terminals in the disaster area, reducing the public's ability to respond to impending dangers and increasing the risk of loss of life and property.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This application provides a method and system for broadcasting early warning messages, which at least solves the technical problem that, in the event of a disaster affecting the terrestrial network, related technologies cannot specifically broadcast public early warning information about sudden public events to more terminals.

[0006] According to one aspect of the embodiments of this application, a method for broadcasting early warning messages is provided, applied to a cell broadcast center, comprising: receiving an emergency broadcast request message sent by a cell broadcast entity, wherein the emergency broadcast request message includes at least: area identification information of the affected area of ​​a public emergency and public early warning information corresponding to the public emergency; and sending an early warning request message to a non-terrestrial network based on the emergency broadcast request message, wherein the early warning request message is used to request the non-terrestrial network to broadcast an early warning message carrying public early warning information to target terminals within the disaster area, the disaster area being an area in the affected area where the terrestrial network cannot provide communication services, and the target terminal being a terminal that supports receiving broadcast messages from a non-terrestrial network.

[0007] Optionally, the emergency broadcast request message may also include: entity identification information of the cell broadcast entity; after receiving the emergency broadcast request message sent by the cell broadcast entity, the method further includes: retrieving the entity identification information of the cell broadcast entity from a preset registration list, wherein the registration list includes entity identification information of multiple authorized legitimate cell broadcast entities; if the retrieval result is successful, determining that the cell broadcast entity is a legitimate cell broadcast entity; if the retrieval result is unsuccessful, determining that the cell broadcast entity is not a legitimate cell broadcast entity, and sending a corresponding emergency broadcast rejection message to the cell broadcast entity.

[0008] Optionally, sending an early warning request message to the non-terrestrial network based on the emergency broadcast request message includes: determining the first core network element corresponding to the area identification information in the terrestrial network from a preset terrestrial area division database, wherein the terrestrial area division database includes the area identification information of multiple service areas within the coverage area of ​​the terrestrial network and the corresponding core network elements; sending the early warning request message to the first core network element based on the emergency broadcast request message, wherein the first core network element is used to forward the early warning request message to a second core network element in the non-terrestrial network, and the second core network element is a core network element in the non-terrestrial network that has completed two-way authentication with the first core network element.

[0009] Optionally, sending an early warning request message to the non-terrestrial network based on the emergency broadcast request message further includes: determining the third core network element corresponding to the area identification information in the non-terrestrial network from a preset non-terrestrial area division database, wherein the non-terrestrial area division database includes the area identification information of multiple service areas within the coverage area of ​​the non-terrestrial network and the corresponding core network element; and sending the early warning request message to the third core network element based on the emergency broadcast request message.

[0010] Optionally, the emergency broadcast request message further includes: the security warning level of the public emergency; sending a warning request message to the non-terrestrial network based on the emergency broadcast request message, further including: determining the first core network element in the terrestrial network corresponding to the area identification information from a preset terrestrial area division database, and determining the third core network element in the non-terrestrial network corresponding to the area identification information from a preset non-terrestrial area division database, wherein the terrestrial area division database includes the area identification information and corresponding core network elements of multiple service areas within the coverage of the terrestrial network, and the non-terrestrial area division database includes the area identification information and corresponding core network elements of multiple service areas within the coverage of the non-terrestrial network; sending a warning request message to the first core network element based on the emergency broadcast request message; receiving a rejection warning response message from the first core network element, wherein the rejection warning response message carries at least the area size of the disaster area and the number of available terminals in the disaster area before the public emergency occurred; and sending a warning request message to the third core network element based on the emergency broadcast request message if the security warning level is not lower than the preset first level and / or the area size of the disaster area is not less than the preset lower limit of the range and / or the number of available terminals is not less than the preset number threshold.

[0011] Optionally, after sending an early warning request message to the non-terrestrial network based on the emergency broadcast request message, the method further includes: sending an emergency broadcast response message to the cell broadcast entity, wherein the emergency broadcast response message is used to indicate that the early warning message has been sent to all terminals in the affected area of ​​the public emergency.

[0012] Optionally, the type of warning message includes at least one of the following: a first type of warning message and a second type of warning message, wherein the first type of warning message includes at least one of the following: a type 10 system information block, a type 11 system information block, and a type 12 system information block in the Long Term Evolution (LTE) network, and the second type of warning message includes at least one of the following: a type 6 system information block, a type 7 system information block, and a type 8 system information block in the new radio network.

[0013] According to another aspect of the embodiments of this application, a method for broadcasting early warning messages is also provided, applied to a network-side device in a non-terrestrial network, comprising: receiving an early warning request message sent by a cell broadcast center, wherein the early warning request message includes at least: public early warning information corresponding to a public emergency; broadcasting an early warning message carrying the public early warning information corresponding to the public emergency to a target terminal in a disaster-stricken area based on the early warning request message, wherein the disaster-stricken area is an area in the affected area of ​​the public emergency where terrestrial networks cannot provide communication services, and the target terminal is a terminal that supports receiving broadcast messages from a non-terrestrial network.

[0014] Optionally, the warning request message may also include: the safety warning level of the public emergency; broadcasting a warning message carrying public warning information corresponding to the public emergency to target terminals in the disaster area based on the warning request message, including: determining whether the safety warning level is lower than the preset second level; if the safety warning level is not lower than the second level, broadcasting the warning message to target terminals in the disaster area through a preset frequency band, wherein the preset frequency band includes at least: the international mobile communication terrestrial network frequency band or the terrestrial network broadcast dedicated frequency band.

[0015] According to another aspect of the embodiments of this application, a warning message broadcasting system is also provided. This warning message broadcasting system includes at least: a cell broadcasting entity, a cell broadcasting center, and a non-terrestrial network. The cell broadcasting entity is used to send an emergency broadcast request message to the cell broadcasting center. The emergency broadcast request message includes at least: area identification information of the affected area of ​​the public emergency and public warning information corresponding to the public emergency. The cell broadcasting center is used to send a warning request message to the non-terrestrial network based on the emergency broadcast request message. The non-terrestrial network is used to broadcast a warning message carrying public warning information to target terminals within the affected area based on the warning request message. The affected area is the area in the affected area where the terrestrial network cannot provide communication services, and the target terminal is a terminal that supports receiving broadcast messages from the non-terrestrial network.

[0016] In this embodiment, the cell broadcast center receives an emergency broadcast request message from the cell broadcast entity and sends an early warning request to the non-terrestrial network based on this message. The request asks the non-terrestrial network to broadcast an early warning message carrying safety early warning information about a public emergency to target terminals in the affected area where the terrestrial network cannot provide communication services. This enables the effective broadcasting of early warning messages to dual-mode terminals that lack non-terrestrial network processing capabilities but have broadcast reception capabilities when the terrestrial network fails. This allows the broadcasting function of the non-terrestrial network to broadcast early warning messages to more terminals in the disaster area, thereby improving the public's ability to respond to public emergencies. This solves the technical problem that related technologies cannot specifically broadcast public early warning information about public emergencies to more terminals when the terrestrial network is damaged. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of an optional early warning message broadcasting system according to an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of system interaction for an optional early warning message broadcasting system according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of system interaction for another optional early warning message broadcasting system according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of system interaction for another optional early warning message broadcasting system according to an embodiment of this application;

[0022] Figure 5 This is a flowchart illustrating an optional early warning message broadcasting method according to an embodiment of this application;

[0023] Figure 6 This is a flowchart illustrating another optional early warning message broadcasting method according to an embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the hardware structure of an optional electronic device for implementing a warning message broadcasting method according to an embodiment of this application. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first," "second," etc., used in the specification, claims, and drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] To better understand the embodiments of this application, the following is a translation and explanation of some nouns or terms that appear in the description of the embodiments of this application:

[0028] Cell Broadcast Center (CBC): This is a core component in a communication network responsible for cell broadcast services. It is mainly used to send emergency information or public warning information to all mobile terminals within the network coverage area or mobile terminals in a specific area without requiring a direct response or connection confirmation from the terminal device.

[0029] Cell Broadcast (CB) is a mobile communication technology that transmits information to users' collections by eliminating the need for a broadcast channel. Users can choose to receive this information, which includes location, weather conditions, disaster warnings, etc. Unlike ordinary point-to-point text messaging, cell broadcast can send the same information to multiple users simultaneously within a specific area, exhibiting regional and time-sensitive characteristics.

[0030] A Cell Broadcast Entity (CBE) is a system component or service node in a mobile communication network responsible for generating, managing, and transmitting cell broadcast information. CBEs are typically managed by network operators or public safety agencies. Their main function is to receive broadcast messages from government, emergency services, or other legitimate information sources, and then transmit these messages to all mobile terminals within a specific geographical area via a wireless interface, without requiring a separate connection between the terminal and the network.

[0031] International Mobile Telecommunications (IMT) bands refer to the radio frequency bands designated by the International Telecommunication Union (ITU) for terrestrial mobile communication systems. These bands are widely used globally for various mobile communication technologies, including 2G networks, 3G networks, 4G LTE (Long Term Evolution) networks, and 5G NR (New Radio) networks. The allocation of IMT bands aims to optimize the efficiency and quality of mobile communications while avoiding interference between different services.

[0032] Terrestrial network broadcasting dedicated frequency bands: These are frequency bands specifically designed for broadcasting services. They are typically designed to carry large volumes of one-way data transmission, such as television broadcasting, radio broadcasting, or public warning broadcasts. In the mobile communications field, some frequency bands are designated for cell broadcasting services, specifically for sending public warnings, news updates, or other important announcements.

[0033] Example 1

[0034] To broadcast public early warning information about public emergencies to more terminals, embodiments of this application provide an early warning message broadcasting system, such as... Figure 1 As shown, the system includes at least: a cell broadcast entity 11, a cell broadcast center 12, and a non-terrestrial network 13. Specifically, the various components within the early warning message broadcast system can interact according to the following process:

[0035] Step 1: Community broadcasting entity 11 sends an emergency broadcast request message to community broadcasting center 12. The emergency broadcast request message includes at least: the area identification information of the affected area of ​​the public emergency and the public warning information corresponding to the public emergency.

[0036] Step 1: The community broadcasting center 12 sends an early warning request message to the non-terrestrial network 13 based on the emergency broadcast request message.

[0037] Step 2: The non-terrestrial network 13 broadcasts a warning message carrying public warning information to target terminals within the disaster area based on the warning request message. The disaster area is the area in the affected region where the terrestrial network cannot provide communication services, and the target terminal is a terminal that supports receiving broadcast messages from the non-terrestrial network.

[0038] The following section describes the interaction methods of each component in the early warning message broadcasting system, using a specific implementation process as an example.

[0039] As an information source, the community broadcasting entity can monitor and receive event information from emergency management departments, meteorological services, earthquake monitoring centers, and other departments before a public emergency occurs. This event information is then formatted into an emergency broadcast request message and sent to the community broadcasting entity via a secure communication link. The request requests the community broadcasting entity to broadcast public warning information corresponding to the public emergency, informing the public that a public emergency is imminent, thereby reducing the loss of life and property caused by the emergency.

[0040] Optionally, the aforementioned emergency broadcast request message may include, but is not limited to: the area identification information of the affected area of ​​the public emergency, the public warning information corresponding to the public emergency, the entity identification information of the community broadcast entity, the safety warning level of the public emergency, and the type of the public emergency. Among these:

[0041] The regional identification information of the affected area of ​​the aforementioned public emergency refers to geographic boundary data or other information codes that can clearly identify a specific geographic area, such as latitude and longitude ranges, address lists, administrative division codes, or specific geographic location codes.

[0042] The aforementioned public early warning information refers to emergency notices that need to be issued to the public. These notices typically contain important information such as detailed descriptions of public emergencies, protective recommendations, and emergency contact information, including earthquake forecasts, flood warnings, severe weather alerts, biological disaster warnings, and safe evacuation guidelines.

[0043] The aforementioned entity identification information refers to data used to uniquely identify the source of the broadcast. It ensures the traceability and security of the message and includes, but is not limited to, organization number, institution code, etc.

[0044] The aforementioned security warning levels are based on factors such as the nature, severity, controllability, and scope of impact of public emergencies, and are used to guide the allocation and optimization of public and private network resources. Examples include Level I (Extremely Serious), Level II (Serious), Level III (Significant), and Level IV (General).

[0045] The aforementioned types of public emergencies are event categories determined according to the classification standards of the public safety early warning system. These categories cover natural disasters, accidents, public health emergencies, and social security incidents. Natural disasters include, but are not limited to, floods and droughts, meteorological disasters, earthquakes, geological disasters, marine disasters, biological disasters, and forest and grassland fires. Accidents include, but are not limited to, various safety accidents in industrial, mining, and commercial enterprises, transportation accidents, public facility and equipment accidents, environmental pollution and ecological damage incidents, etc. Public health emergencies include, but are not limited to, infectious disease outbreaks, unexplained group illnesses, food safety issues, occupational hazards, and animal epidemics. Social security incidents include, but are not limited to, terrorist attacks, economic security incidents, and foreign-related emergencies.

[0046] After receiving an emergency broadcast request message from the community broadcasting entity, the community broadcasting center can verify the legitimacy of the emergency broadcast request message source using the following methods to prevent the spread of false security warning messages:

[0047] The entity identification information of the community broadcasting entity is retrieved from the preset registration list. The registration list includes the entity identification information of multiple authorized and legitimate community broadcasting entities. Each entity identification information is unique and is used to verify the validity and legitimacy of the community broadcasting entity.

[0048] If the search result is successful, the cell broadcast entity is determined to be a legitimate cell broadcast entity, and the subsequent warning request operation is executed.

[0049] If the search result is unsuccessful, it is determined that the cell broadcasting entity is not a legitimate cell broadcasting entity, and a corresponding emergency broadcast rejection message is sent back to it to prevent the spread of illegal warning messages and ensure the security and authenticity of the warning message broadcasting system.

[0050] Through the above authentication and verification process, the community broadcasting center can ensure that only verified and legitimate community broadcasting entities can initiate the broadcast of early warning messages, avoiding false alarms, information leaks or system interference caused by unauthorized broadcast requests, and protecting the resources of the public early warning system from being abused.

[0051] Furthermore, the community broadcasting center can send an early warning request message to the non-terrestrial network based on the emergency broadcast request message. This early warning request message is used to request the non-terrestrial network to broadcast an early warning message carrying public early warning information to target terminals in the disaster-stricken area, which is the area in the affected region where the terrestrial network cannot provide communication services.

[0052] Among them, the target terminal that only supports Receive Only Mode (ROM) to receive warning messages broadcast from non-terrestrial networks ensures that even terminals without satellite access capabilities can receive public warning information, which greatly expands the scope of the warning audience and enhances public safety.

[0053] Terrestrial networks are communication networks built upon Earth's surface infrastructure, including but not limited to the following types: cellular mobile networks, fixed-line networks, Wi-Fi networks, and Ethernet. These networks rely on ground base stations, repeaters, and other terrestrial communication equipment to transmit and receive data and signals. Non-terrestrial networks, on the other hand, are communication networks that do not entirely rely on Earth's surface infrastructure. These include but are not limited to the following types: satellite communication networks, airborne relay networks, and deep-sea communication networks. These networks can cover remote areas, oceans, or the air that are difficult for terrestrial networks to reach, and provide backup communication links when terrestrial networks are damaged.

[0054] Specifically, considering the different network environments in the areas affected by public emergencies, the process of the community broadcasting center sending early warning messages to target terminals can be divided into the following three situations:

[0055] (i) The area affected by a public emergency covers both ground networks and non-ground networks, and there is a coordination mechanism between the ground networks and non-ground networks.

[0056] The collaborative mechanism between terrestrial and non-terrestrial networks can be understood as the interaction and cooperation between them at multiple levels. This includes, but is not limited to: establishing interconnection channels, i.e., achieving information exchange and collaborative work between the two through standardized interfaces and communication protocols; sharing resources, such as allowing non-terrestrial networks to serve as backup networks when terrestrial networks partially or completely fail due to natural disasters, human-caused damage, or equipment failure, undertaking tasks such as data transmission, voice communication, and broadcasting early warning messages; and intelligent scheduling, such as diverting communication traffic from the affected terrestrial network area to non-terrestrial networks to maintain communication connectivity and service continuity when terrestrial networks partially or completely fail due to natural disasters, human-caused damage, or equipment failure. In summary, the collaborative mechanism between terrestrial and non-terrestrial networks integrates these two types of networks through resource sharing and intelligent scheduling, forming a highly integrated comprehensive communication system capable of coping with the challenges of complex communication environments.

[0057] In the above-mentioned situation, the early warning message broadcasting system can send early warning messages to target terminals in the disaster-stricken area using the following methods:

[0058] Step 1: The community broadcasting center determines the first core network element (such as access and mobile new management function network element, user plane function network element) corresponding to the area identification information of the affected area of ​​the terrestrial network in the pre-set terrestrial area division database. The terrestrial area division database includes the area identification information of multiple service areas within the coverage of the terrestrial network and the corresponding core network elements.

[0059] Step 2: The community broadcasting center sends an early warning request message to the first core network element based on the emergency broadcast request message.

[0060] This is because the emergency broadcast request message is initially generated by the cell broadcast entity, which may use a specific set of data formats and encoding rules. In order to facilitate the broadcast of this information through different networks, the cell broadcast center needs to convert this information into a network-compatible format, that is, rewrite the emergency broadcast request message into an early warning request message to ensure that the information can be correctly identified and broadcast.

[0061] Step 3: Under normal circumstances, after receiving the early warning request message, the first core network element of the terrestrial network forwards the message to the base station of the terrestrial network, and the base station broadcasts the early warning message to all terminals in the disaster area. However, due to a sudden public event, the terrestrial network may malfunction, affecting the normal operation of the first core network element and preventing it from forwarding the early warning request message. In this case, the first core network element can generate a rejection early warning response message and send it back to the cell broadcast center. The rejection early warning response message carries at least the size of the disaster area (the area in the impact area of ​​the sudden public event where the terrestrial network cannot provide communication services) and the number of available terminals in the disaster area before the sudden public event, so that the cell broadcast center can determine which areas to broadcast the early warning message to, improving the timeliness and accuracy of the broadcast early warning message and reducing unnecessary resource consumption.

[0062] Specifically, the number of available terminals before the aforementioned public emergency can be determined as follows: During normal operation, the terrestrial network stores terminal registration information, including but not limited to the terminal's TAC (Tracking Area Code) location and registration status. Therefore, after a public emergency occurs and the terrestrial network partially or completely fails, the first core network element of the terrestrial network can estimate the number of available terminals in the affected area based on the last received terminal registration information.

[0063] Step 4: Since the first core network element and the second core network element of the non-terrestrial network (i.e., network-side equipment in the non-terrestrial network, such as the access and mobility new management function network element and the user plane function network element) have completed two-way authentication in advance, the first core network element can communicate with the second core network element through the interconnection channel. Therefore, the first core network element can forward the warning request message to the second core network element of the non-terrestrial network through the interconnection channel.

[0064] It should be noted that the embodiments of this application do not impose specific restrictions on the execution order between the third and fourth steps described above. The third step can be executed first, followed by the fourth step; or the fourth step can be executed first, followed by the third step.

[0065] Step 5: The second core network element in the non-terrestrial network can forward the warning request message to the base station in the non-terrestrial network (which is also a network-side device in the non-terrestrial network, such as eNB or gNB).

[0066] Step 6: Base stations on non-terrestrial networks can broadcast warning messages carrying public warning information to target terminals within the disaster area based on the warning request message.

[0067] Specifically, non-terrestrial network base stations can broadcast warning messages by following these steps:

[0068] Determine whether the security warning level carried in the warning request message is lower than the preset second level, where the second level reflects the severity and urgency of the public emergency.

[0069] When the security warning level is not lower than Level II, it indicates that the public emergency poses a high security risk. In this case, non-terrestrial network base stations can broadcast the warning message to target terminals within the disaster area via preset frequency bands. The preset frequency bands can be selected based on different circumstances, including at least: international mobile communication terrestrial network frequency bands or dedicated terrestrial network broadcast frequency bands, thereby improving resource utilization efficiency. The broadcasting method can employ cell broadcast technology, using SIB (System Information Block) messages or similar mechanisms to broadcast the warning message to all target terminals within the disaster area.

[0070] Regarding the selection of the aforementioned preset frequency bands, there are two possible scenarios:

[0071] (1) Base stations may use the international mobile terrestrial network frequency bands defined by the terrestrial network within the permitted range. The permitted range is smaller than the disaster-stricken area. It should be noted that if international mobile terrestrial network frequency bands are used, explicit permission must be obtained from the cell broadcasting center, and transmission must be carried out within the physical coverage area to prevent interference with normal terrestrial mobile communication networks.

[0072] (2) Base stations can use the dedicated frequency band for terrestrial network broadcasting within the disaster area, and this does not require special permission from the community broadcasting center.

[0073] Furthermore, the aforementioned warning messages include at least one of the following types: Type I warning messages and Type II warning messages. Type I warning messages include at least one of the following: Type 10, Type 11, and Type 12 system information blocks in the Long Term Evolution (LTE) network; Type II warning messages include at least one of the following: Type 6, Type 7, and Type 8 system information blocks in the New Radio Network. This is because system information blocks, as a key mechanism for wide-area broadcasting in mobile networks, are designed to ensure that information can cover all terminals within the network service area (regardless of whether the terminal is in an active communication state). Terminals can read the public warning information carried by the system information blocks even when only receiving mode is enabled, i.e., the terminal does not need to establish a complete access process with the core network elements. Therefore, using system information blocks as the message carrier for public warning information can maximize the delivery of public warning information to all target terminals within the disaster area.

[0074] Therefore, the forms of the aforementioned warning messages include, but are not limited to: mobile phone text messages, wireless emergency alerts (i.e., short text alerts sent via cellular networks that can be directly pushed to compatible mobile devices), and mobile application push alerts (i.e., emergency notifications pushed through installed emergency response or warning applications).

[0075] When the security alert level is lower than the second level, considering that the resources of non-terrestrial networks (such as bandwidth, power, and processing capacity) are limited, during normal operation, non-terrestrial networks need to prioritize their own support services (such as military communications, air traffic control, and maritime rescue), which typically have high priority. Therefore, when a base station is requested to broadcast a security alert message with a lower security alert level, it can first determine whether the request conflicts with the high-priority services being performed by the non-terrestrial network in terms of resources. If so, the base station will send a warning rejection message to the cell broadcast center through the second core network element. This message may include the reason for rejection (such as insufficient resources or priority conflict) and possible alternative suggestions (such as broadcasting again when resources allow or using other frequency bands). Subsequently, the cell broadcast center will re-evaluate the broadcasting scheme of the security alert message based on actual needs and resource availability.

[0076] In addition, after the third or fourth step (i.e., the first core network element sends the rejection warning response message to the cell broadcast center), the cell broadcast center can also send an emergency broadcast response message to the cell broadcast entity. The emergency broadcast response message is used to indicate that the warning message has been sent to all terminals in the affected area of ​​the public emergency.

[0077] Specifically, Figure 2 This illustrates the interaction flow between various components when a warning message broadcasting system broadcasts a warning message, provided that the affected area is simultaneously covered by both terrestrial and non-terrestrial networks, and a coordination mechanism exists between the terrestrial and non-terrestrial networks:

[0078] S1, the community broadcast entity sends an emergency broadcast request message to the community broadcast center, which includes at least: the area identification information of the affected area of ​​the public emergency, the public warning information corresponding to the public emergency, the entity identification information of the community broadcast entity, and the safety warning level of the public emergency.

[0079] S2, the community broadcasting center parses the received emergency broadcast request message, obtains the area identification information of the affected area of ​​the public emergency, queries the corresponding first core network element from the preset ground area division database, and sends the warning request message to the first core network element.

[0080] S3, the first core network element forwards the warning request message to the second core network element in the non-terrestrial network during the two-way authentication process.

[0081] S4, the first core network element sends a rejection message to the community broadcast center, which includes at least the size of the affected area and the number of available terminals in the affected area before the public emergency occurred.

[0082] S5, the community broadcasting center sends an emergency broadcast response message to the community broadcasting entity. The emergency broadcast response message is used to indicate that the warning message has been sent to all terminals in the affected area of ​​the public emergency.

[0083] S6, the second core network element sends the warning request message to the base station of the non-terrestrial network.

[0084] S7: Base stations in non-terrestrial networks broadcast warning messages carrying public early warning information corresponding to sudden public events to target terminals in the disaster area.

[0085] Therefore, the early warning message broadcasting system, through close collaboration between terrestrial and non-terrestrial networks, ensures that even if the terrestrial network fails due to a sudden public event, the non-terrestrial network can still quickly and accurately access the system to provide early warning services.

[0086] (ii) The area affected by a public emergency covers both ground networks and non-ground networks, but there is no coordination mechanism between the ground networks and non-ground networks.

[0087] In the above situation, the early warning message broadcasting system can send early warning messages to target terminals in the disaster area in the following manner:

[0088] Step 1: The community broadcasting center determines the first core network element corresponding to the area identification information in the terrestrial network from a pre-set terrestrial area partitioning database, and determines the third core network element corresponding to the area identification information in the non-terrestrial network from a pre-set non-terrestrial area partitioning database. The terrestrial area partitioning database includes the area identification information and corresponding core network elements for multiple service areas within the terrestrial network coverage area, while the non-terrestrial area partitioning database includes the area identification information and corresponding core network elements for multiple service areas within the non-terrestrial network coverage area.

[0089] The second step involves the community broadcasting center sending an early warning request message to the first core network element based on the emergency broadcast request message.

[0090] Step 3: Under normal circumstances, after receiving the early warning request message, the first core network element of the terrestrial network forwards the message to the base station of the terrestrial network, and the base station broadcasts the early warning message to all terminals in the disaster area. However, due to a sudden public event, the terrestrial network may malfunction, affecting the normal operation of the first core network element and preventing it from forwarding the early warning request message. In this case, the first core network element can generate a rejection early warning response message and send it back to the cell broadcast center. The rejection early warning response message carries at least the size of the disaster area (the area in the impact area of ​​the sudden public event where the terrestrial network cannot provide communication services) and the number of available terminals in the disaster area before the sudden public event, so that the cell broadcast center can determine which areas to broadcast the early warning message to, improving the timeliness and accuracy of the broadcast early warning message and reducing unnecessary resource consumption.

[0091] Step 4: The community broadcast center parses the rejected warning response message to obtain the size of the affected area and the number of available terminals. It then determines whether the public emergency warning level is lower than the preset first level, whether the size of the affected area is less than the preset lower limit, and whether the number of available terminals is less than the preset threshold. Specifically, if the public emergency warning level is not lower than the preset first level and / or the size of the affected area is not less than the preset lower limit and / or the number of available terminals is not less than the preset threshold, proceed to Step 5. If the public emergency warning level is lower than the preset first level, the size of the affected area is less than the preset lower limit, and the number of available terminals is less than the preset threshold, proceed to Step 6. Step 5: The community broadcast center sends a warning request message to the third core network element (i.e., network-side equipment in the non-terrestrial network, such as the access and mobility new management function network element and the user plane function network element) based on the emergency broadcast request message.

[0092] Step 6: The community broadcasting center sends an emergency broadcast rejection message to the community broadcasting entity corresponding to the emergency broadcast request.

[0093] Step 7: The third core network element can forward the warning request message to the base station in the non-terrestrial network (i.e., network-side equipment in the non-terrestrial network, such as eNB and gNB).

[0094] Step 8: Base stations on non-terrestrial networks can broadcast early warning messages to target terminals within the disaster area based on early warning request messages.

[0095] In addition, after the fourth step mentioned above, the community broadcasting center can also send an emergency broadcast response message to the community broadcasting entity. The emergency broadcast response message is used to indicate that the warning message has been sent to all terminals in the affected area of ​​the public emergency.

[0096] Specifically, Figure 3 This illustrates the interaction flow between various components when a warning message broadcasting system broadcasts a warning message in a situation where both terrestrial and non-terrestrial networks cover the affected area, but there is no coordination mechanism between the terrestrial and non-terrestrial networks:

[0097] S1, the community broadcast entity sends an emergency broadcast request message to the community broadcast center, which includes at least: the area identification information of the affected area of ​​the public emergency, the public warning information corresponding to the public emergency, the entity identification information of the community broadcast entity, and the safety warning level of the public emergency.

[0098] S2, the community broadcasting center parses the emergency broadcast request message to obtain the area identification information of the affected area of ​​the public emergency, and queries the corresponding first core network element and third core network element from the preset ground area division database and non-ground area division database respectively, and sends the warning request message to the first core network element.

[0099] S3, the first core network element sends a rejection message to the community broadcast center, which carries at least information such as the size of the disaster area and the number of available terminals in the disaster area before the public emergency occurred.

[0100] S4: The community broadcast center parses the rejection warning response message to obtain the size of the affected area and the number of available terminals. It then determines whether the public emergency warning level is lower than the preset first level, whether the size of the affected area is less than the preset lower limit, and whether the number of available terminals is less than the preset threshold. If the public emergency warning level is not lower than the preset first level and / or the size of the affected area is not less than the preset lower limit and / or the number of available terminals is not less than the preset threshold, then proceed to S5. If the public emergency warning level is lower than the preset first level, the size of the affected area is less than the preset lower limit, and the number of available terminals is less than the preset threshold, then proceed to S6.

[0101] S5, the community broadcasting center sends an early warning request message to the third core network element in the non-terrestrial network.

[0102] S6, the community broadcasting center sends an emergency broadcast rejection message to the community broadcasting entity corresponding to the emergency broadcast request.

[0103] S7, the community broadcasting center sends an emergency broadcast response message to the community broadcasting entity. The emergency broadcast response message is used to indicate that the warning message has been sent to all terminals in the affected area of ​​the public emergency.

[0104] S8, the third core network element sends the warning request message to the base station of the non-terrestrial network.

[0105] S9, base stations in non-terrestrial networks broadcast warning messages carrying public early warning information about sudden public events to target terminals in the disaster area.

[0106] Therefore, the early warning message broadcasting system, through the above process, broadcasts early warning messages via non-terrestrial networks, making up for the lack of terrestrial network coverage, reducing the risk of information chain interruption due to a single network failure, and improving the reliability of early warning.

[0107] (iii) The affected area of ​​a public emergency is only covered by non-terrestrial networks.

[0108] In the above situation, the early warning message broadcasting system can send early warning messages to target terminals in the disaster area in the following manner:

[0109] Step 1: The community broadcasting center determines the third core network element corresponding to the area identification information in the non-terrestrial network from the preset non-terrestrial area division database. The non-terrestrial area division database includes the area identification information of multiple service areas within the coverage area of ​​the non-terrestrial network and the corresponding core network element.

[0110] Step 2: The community broadcasting center sends an early warning request message to the third core network element (i.e., network-side equipment in the non-terrestrial network, such as the access and mobile new management function network element and the user plane function network element) based on the emergency broadcast request message.

[0111] Step 3: The third core network element can forward the warning request message to the base station in the non-terrestrial network (i.e., network-side equipment in the non-terrestrial network, such as eNB and gNB).

[0112] Step 4: Base stations on non-terrestrial networks can broadcast warning messages carrying public warning information about sudden public events to target terminals in the disaster area based on the warning request message.

[0113] In addition, after the second step mentioned above, the community broadcasting center can also send an emergency broadcast response message to the community broadcasting entity. The emergency broadcast response message is used to indicate that the warning message has been sent to all terminals in the affected area of ​​the public emergency.

[0114] Specifically, Figure 4 This diagram illustrates the interactions between various systems during the transmission of early warning messages when the affected area has only non-terrestrial network coverage. The interaction flow between the various components when the early warning message broadcasting system broadcasts the early warning message is as follows:

[0115] S1, the community broadcast entity sends an emergency broadcast request message to the community broadcast center, which includes at least: the area identification information of the affected area of ​​the public emergency, the public warning information corresponding to the public emergency, the entity identification information of the community broadcast entity, and the safety warning level of the public emergency.

[0116] S2, the community broadcasting center parses the emergency broadcast request message, obtains the area identification information of the affected area of ​​the public emergency, and queries the corresponding third core network element from the preset non-ground area division database, and sends the warning request message to the third core network element.

[0117] S3, the community broadcasting center sends an emergency broadcast response message to the community broadcasting entity. The emergency broadcast response message is used to indicate that the warning message has been sent to all terminals in the affected area of ​​the public emergency.

[0118] S4, the third core network element sends the warning request message to the non-terrestrial network base station.

[0119] S5 refers to base stations in non-terrestrial networks broadcasting warning messages carrying public early warning information about sudden public events to target terminals in the disaster area.

[0120] Similarly, the early warning message broadcasting system, through the above process, broadcasts early warning messages via non-terrestrial networks, making up for the lack of terrestrial network coverage, reducing the risk of information chain interruption due to a single network failure, and improving the reliability of early warnings.

[0121] In summary, the early warning message broadcasting system, through the above process, can broadcast early warning messages of public emergencies to target terminals in disaster-stricken areas via non-terrestrial networks when terrestrial networks fail due to sudden public events. This ensures that more target terminals in disaster-stricken areas can receive public early warning information, enhances the public's ability to respond to impending dangers, and reduces the risk of loss of life and property.

[0122] Example 2

[0123] Based on the early warning message broadcasting system provided in Embodiment 1, this application embodiment provides an early warning message broadcasting method applied to a community broadcasting center. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0124] Figure 5 This is a flowchart illustrating a method for broadcasting early warning messages according to an embodiment of this application, as shown below. Figure 5 As shown, the method includes the following steps:

[0125] Step S502: Receive an emergency broadcast request message sent by the cell broadcast entity, wherein the emergency broadcast request message includes at least: area identification information of the affected area of ​​the public emergency and public warning information corresponding to the public emergency;

[0126] Step S504: Send an early warning request message to the non-terrestrial network according to the emergency broadcast request message. The early warning request message is used to request the non-terrestrial network to broadcast an early warning message carrying public early warning information to target terminals in the disaster area. The disaster area is the area in the affected area where the terrestrial network cannot provide communication services, and the target terminal is a terminal that supports receiving broadcast messages from the non-terrestrial network.

[0127] The following section explains each step of the early warning message broadcasting method in conjunction with the specific implementation process.

[0128] First, the emergency broadcast request message received by the community broadcasting center from the community broadcasting entity may also include: the area identification information of the affected area of ​​the public emergency and the entity identification information of the community broadcasting entity.

[0129] After receiving an emergency broadcast request message from a community broadcast entity, the community broadcasting center can verify the legitimacy of the message's source using the following method to prevent the spread of false security alerts: It retrieves the entity identifier information of the community broadcast entity from a pre-set registration list, which includes the entity identifier information of multiple authorized and legitimate community broadcast entities; if the search is successful, the community broadcast entity is determined to be legitimate; if the search fails, the community broadcast entity is determined to be illegitimate and a corresponding emergency broadcast rejection message is sent back to the community broadcast entity.

[0130] Through the above authentication and verification process, the community broadcasting center can ensure that only verified and legitimate community broadcasting entities can initiate the broadcast of early warning messages, thus avoiding false alarms, information leaks, or system interference caused by unauthorized broadcast requests and protecting the resources of the public early warning system from being abused.

[0131] Furthermore, the community broadcasting center can send early warning request messages to non-terrestrial networks based on emergency broadcast request messages. These early warning request messages request the non-terrestrial networks to send early warning messages carrying safety warning information about sudden public events to target terminals within the disaster-stricken area. The disaster-stricken area is the region where terrestrial networks cannot provide communication services, and the target terminals are terminals that support receiving broadcast messages from non-terrestrial networks. Regarding the support for target terminals in Receive Only Mode (ROM) to receive broadcast messages, this ensures that even terminals without satellite access capabilities can receive public early warning information, greatly expanding the reach of early warning messages and enhancing public safety.

[0132] Specifically, considering the different network environments in the areas affected by public emergencies, the process of the community broadcasting center sending early warning messages to target terminals can be divided into the following three situations:

[0133] (i) The area affected by a public emergency covers both ground networks and non-ground networks, and there is a coordination mechanism between the ground networks and non-ground networks.

[0134] In the above situation, the community broadcasting center can send an early warning request message to the non-terrestrial network according to the following procedure: determine the first core network element in the terrestrial network corresponding to the area identification information from the preset terrestrial area division database, wherein the terrestrial area division database includes the area identification information of multiple service areas within the coverage area of ​​the terrestrial network and the corresponding core network element; and send the early warning request message to the aforementioned first core network element based on the emergency broadcast request message.

[0135] Under normal circumstances, after receiving an early warning request message, the first core network element of the terrestrial network forwards the message to the base station of the terrestrial network, which then broadcasts the early warning message to all terminals in the disaster area. However, due to sudden public events, the terrestrial network may malfunction, affecting the normal operation of the first core network element and preventing it from forwarding the early warning request message. Therefore, the first core network element can report the rejection of the early warning response message to the cell broadcast center and forward the early warning request message to the second core network element in the non-terrestrial network. The rejection of the early warning response message carries at least the size of the disaster area (the area in the impact area of ​​the sudden public event where the terrestrial network cannot provide communication services) and the number of available terminals in the disaster area before the occurrence of the sudden public event. The second core network element is a core network element in the non-terrestrial network that has completed two-way authentication with the first core network element.

[0136] (ii) The area affected by a public emergency covers both ground networks and non-ground networks, but there is no coordination mechanism between the ground networks and non-ground networks.

[0137] In the above situation, the community broadcasting center can send an early warning request message to the non-terrestrial network according to the following procedure: Determine the first core network element corresponding to the area identification information in the terrestrial network from the preset terrestrial area division database, and determine the third core network element corresponding to the area identification information in the non-terrestrial network from the preset non-terrestrial area division database. The terrestrial area division database includes the area identification information and corresponding core network elements for multiple service areas within the terrestrial network coverage area, and the non-terrestrial area division database includes the area identification information and corresponding core network elements for multiple service areas within the non-terrestrial network coverage area. Send an early warning request message to the first core network element based on the emergency broadcast request message. Receive a rejection response message from the first core network element. If the security early warning level is not lower than the preset first level and / or the size of the affected area is not less than the preset lower limit and / or the number of available terminals is not less than the preset quantity threshold, send an early warning request message to the third core network element based on the emergency broadcast request message.

[0138] (iii) The affected area of ​​a public emergency is simultaneously covered only by non-terrestrial networks.

[0139] In the above situation, the community broadcasting center can send an early warning request message to the non-terrestrial network according to the following procedure: determine the third core network element in the non-terrestrial network corresponding to the area identification information from the preset non-terrestrial area division database, wherein the non-terrestrial area division database includes the area identification information of multiple service areas within the coverage of the non-terrestrial network and the corresponding core network element; and send the early warning request message to the third core network element according to the emergency broadcast request message.

[0140] Furthermore, after the community broadcasting center sends an early warning request message to the non-terrestrial network based on the emergency broadcast request message, it can also send an emergency broadcast response message back to the community broadcasting entity. The emergency broadcast response message is used to indicate that the early warning message has been sent to all terminals in the affected area of ​​the public emergency.

[0141] In addition, the types of the aforementioned warning messages include at least one of the following: a first type of warning message and a second type of warning message. The first type of warning message includes at least one of the following: a type 10 system information block, a type 11 system information block, and a type 12 system information block in the Long Term Evolution (LTE) network. The second type of warning message includes at least one of the following: a type 6 system information block, a type 7 system information block, and a type 8 system information block in the new radio network.

[0142] This application also provides a method for broadcasting early warning messages to network-side devices in non-terrestrial networks. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0143] Figure 6 This is a flowchart illustrating an optional early warning message broadcasting method according to an embodiment of this application, as shown below. Figure 6 As shown, the method includes the following steps:

[0144] Step S602: Receive an early warning request message sent by the community broadcasting center, wherein the early warning request message includes at least: public early warning information corresponding to the sudden public event;

[0145] Step S603: Broadcast a warning message carrying public warning information to target terminals within the disaster area according to the warning request message. The disaster area is the area affected by the sudden public event where the ground network cannot provide communication services, and the target terminal is a terminal that supports receiving broadcast messages from non-terrestrial networks.

[0146] The following section explains each step of the early warning message broadcasting method in conjunction with the specific implementation process.

[0147] First, network-side equipment in the non-terrestrial network receives early warning request messages sent by the cell broadcast center. The network-side equipment in the non-terrestrial network includes at least: core network elements and base stations.

[0148] Specifically, the core network element, as a component of the core network of the non-terrestrial network, is used to receive early warning request messages sent by the cell broadcast center, perform authentication based on the content of the message, and send a request message to the base station to send public early warning information to target terminals in the disaster area; the base station is used to broadcast early warning messages carrying public early warning information corresponding to the sudden public event directly to target terminals in the disaster area based on the early warning request messages sent by the core network element.

[0149] As an optional implementation, network-side devices in non-terrestrial networks can broadcast early warning messages corresponding to public emergencies to target terminals within the disaster area according to the following procedure:

[0150] Determine whether the safety warning level of the public emergency is lower than the preset second level; if the safety warning level is not lower than the second level, broadcast the warning message to the target terminal in the disaster area through the preset frequency band, wherein the preset frequency band includes at least: the international mobile communication terrestrial network frequency band or the terrestrial network broadcast dedicated frequency band.

[0151] When the security alert level is lower than the second level, considering that the resources of non-terrestrial networks (such as bandwidth, power, and processing capacity) are limited, during normal operation, non-terrestrial networks need to prioritize their own support services (such as military communications, air traffic control, and maritime rescue), which typically have high priority. Therefore, when a base station is requested to broadcast a security alert message with a lower security alert level, it can first determine whether the request conflicts with the high-priority services being performed by the non-terrestrial network in terms of resources. If so, the base station will send a warning rejection message to the cell broadcast center through the second core network element. This message may include the reason for rejection (such as insufficient resources or priority conflict) and possible alternative suggestions (such as broadcasting again when resources allow or using other frequency bands). Subsequently, the cell broadcast center will re-evaluate the broadcasting scheme of the security alert message based on actual needs and resource availability.

[0152] It should be noted that each step in the early warning message broadcasting method in this application embodiment corresponds one-to-one with the interaction steps of each module in the early warning message broadcasting system in embodiment 1. Since embodiment 1 has been described in detail, some details not shown in this embodiment can be referred to embodiment 1, and will not be elaborated further here.

[0153] Example 3

[0154] According to an embodiment of this application, a non-volatile storage medium is also provided, which includes a stored computer program, wherein the device containing the non-volatile storage medium executes the warning message broadcasting method in Embodiment 1 by running the computer program.

[0155] According to an embodiment of this application, a processor is also provided for running a computer program, wherein the computer program executes the warning message broadcasting method in embodiment 1 during runtime.

[0156] According to an embodiment of this application, an electronic device is also provided, comprising: a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the warning message broadcasting method of Embodiment 1 through the computer program.

[0157] Specifically, the computer program executes the following steps during runtime: receiving an emergency broadcast request message sent by a cell broadcast entity, wherein the emergency broadcast request message includes at least: area identification information of the affected area of ​​the public emergency and public warning information corresponding to the public emergency; and sending a warning request message to a non-terrestrial network based on the emergency broadcast request message, wherein the warning request message is used to request the non-terrestrial network to broadcast a warning message carrying public warning information to target terminals in the disaster area, the disaster area being the area in the affected area where the terrestrial network cannot provide communication services, and the target terminal being a terminal that supports receiving broadcast messages from the non-terrestrial network.

[0158] Specifically, the computer program executes the following steps during runtime: receiving an early warning request message sent by the community broadcast center, wherein the early warning request message includes at least: public early warning information corresponding to the public emergency; broadcasting an early warning message carrying the public early warning information to target terminals in the disaster area based on the early warning request message, wherein the disaster area is the area in the affected area of ​​the public emergency where the terrestrial network cannot provide communication services, and the target terminal is a terminal that supports receiving broadcast messages from non-terrestrial networks.

[0159] As an alternative implementation, the above-mentioned electronic device may exist in the form of a mobile terminal, a computer terminal, or a similar computing device. Figure 7 A hardware block diagram of a computer terminal for implementing a method for broadcasting early warning messages is shown. Figure 7 As shown, the electronic device 70 may include one or more (shown as 702a, 702b, ..., 702n) processors 702 (processors 702 may include, but are not limited to, microprocessors such as MCUs or programmable logic devices such as FPGAs), a memory 704 for storing data, and a transmission device 706 for communication functions. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of a BUS bus), a network interface, a power supply, and / or a camera. Those skilled in the art will understand that... Figure 7 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned computer terminal. For example, electronic device 70 may also include... Figure 7 The more or fewer components shown, or having the same Figure 7 The different configurations shown.

[0160] It should be noted that the aforementioned one or more processors 702 and / or other data processing circuits are generally referred to herein as "data processing circuits". These data processing circuits may be embodied, in whole or in part, in software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuits may be a single, independent processing module, or may be integrated, in whole or in part, into any other element of the electronic device 70. As involved in the embodiments of this application, the data processing circuits serve as a processor control mechanism (e.g., selection of a variable resistor termination path connected to an interface).

[0161] The memory 704 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the warning message broadcasting method in this embodiment. The processor 702 executes various functional applications and data processing by running the software programs and modules stored in the memory 704, thereby implementing the aforementioned vulnerability detection method for the application. The memory 704 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 704 may further include memory remotely located relative to the processor 702, and these remote memories can be connected to the electronic device 70 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0162] The transmission device 706 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of the electronic device 70. In one example, the transmission device 706 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device 706 may be a Radio Frequency (RF) module for wireless communication with the Internet.

[0163] The display can be, for example, a touchscreen liquid crystal display (LCD), which allows the user to interact with the user interface of the electronic device 70.

[0164] The sequence numbers of the above embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0165] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0166] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0167] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0168] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0169] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0170] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for broadcasting early warning messages, characterized in that, Applications in community broadcasting centers include: Receive an emergency broadcast request message sent by a community broadcast entity, wherein the emergency broadcast request message includes at least: area identification information of the affected area of ​​the public emergency and public warning information corresponding to the public emergency; According to the emergency broadcast request message, an early warning request message is sent to a non-terrestrial network. The early warning request message is used to request the non-terrestrial network to broadcast an early warning message carrying the public early warning information to target terminals in the disaster area. The disaster area is the area in the affected area where the terrestrial network cannot provide communication services. The target terminal is a terminal that supports receiving the broadcast message from the non-terrestrial network.

2. The method according to claim 1, characterized in that, The emergency broadcast request message also includes: entity identifier information of the cell broadcast entity; after receiving the emergency broadcast request message sent by the cell broadcast entity, the method further includes: The entity identification information of the cell broadcast entity is retrieved from a preset registration list, wherein the registration list includes the entity identification information of multiple authorized and legitimate cell broadcast entities; If the search result is successful, the cell broadcast entity is determined to be a legitimate cell broadcast entity. If the search result is a search failure, it is determined that the cell broadcast entity is not a legitimate cell broadcast entity, and a corresponding emergency broadcast rejection message is sent back to the cell broadcast entity.

3. The method according to claim 1, characterized in that, Sending an early warning request message to a non-terrestrial network based on the aforementioned emergency broadcast request message includes: The first core network element corresponding to the area identification information in the ground network is determined from the preset ground area division database, wherein the ground area division database includes the area identification information of multiple service areas within the coverage area of ​​the ground network and the corresponding core network element; The warning request message is sent to the first core network element according to the emergency broadcast request message. The first core network element is used to forward the warning request message to the second core network element of the non-terrestrial network. The second core network element is a core network element in the non-terrestrial network that has completed two-way authentication with the first core network element.

4. The method according to claim 1, characterized in that, Sending a warning request message to a non-terrestrial network based on the aforementioned emergency broadcast request message also includes: The third core network element corresponding to the area identification information in the non-terrestrial network is determined from the preset non-terrestrial area partitioning library, wherein the non-terrestrial area partitioning library includes the area identification information of multiple service areas within the coverage area of ​​the non-terrestrial network and the corresponding core network element; The warning request message is sent to the third core network element based on the emergency broadcast request message.

5. The method according to claim 1, characterized in that, The emergency broadcast request message also includes: the safety warning level of the public emergency; and sending a warning request message to a non-terrestrial network based on the emergency broadcast request message also includes: The first core network element corresponding to the area identification information in the terrestrial network is determined from a preset terrestrial area partitioning library, and the third core network element corresponding to the area identification information in the non-terrestrial network is determined from a preset non-terrestrial area partitioning library. The terrestrial area partitioning library includes the area identification information and corresponding core network elements of multiple service areas within the coverage area of ​​the terrestrial network, and the non-terrestrial area partitioning library includes the area identification information and corresponding core network elements of multiple service areas within the coverage area of ​​the non-terrestrial network. The warning request message is sent to the first core network element according to the emergency broadcast request message; Receive a rejection warning response message from the first core network element, wherein the rejection warning response message carries at least the area size of the disaster area and the number of available terminals in the disaster area before the occurrence of the public emergency. When the security warning level is not lower than the preset first level and / or the size of the disaster area is not less than the preset lower limit and / or the number of available terminals is not less than the preset number threshold, the warning request message is sent to the third core network element according to the emergency broadcast request message.

6. The method according to claim 1, characterized in that, After sending an early warning request message to a non-terrestrial network based on the emergency broadcast request message, the method further includes: An emergency broadcast response message is sent to the cell broadcast entity, wherein the emergency broadcast response message is used to indicate that the warning message has been sent to all terminals in the affected area of ​​the public emergency.

7. The method according to claim 1, characterized in that, The types of warning messages include at least one of the following: a first type of warning message and a second type of warning message, wherein the first type of warning message includes at least one of the following: a type 10 system information block, a type 11 system information block, and a type 12 system information block in the Long Term Evolution (LTE) network, and the second type of warning message includes at least one of the following: a type 6 system information block, a type 7 system information block, and a type 8 system information block in the new radio network.

8. A method for broadcasting early warning messages, characterized in that, Network-side devices used in non-terrestrial networks include: Receive an early warning request message sent by the community broadcasting center, wherein the early warning request message includes at least: public early warning information corresponding to the sudden public event; Based on the warning request message, a warning message carrying the public warning information is broadcast to target terminals within the disaster area. The disaster area is an area in the impact area of ​​a sudden public event where ground networks cannot provide communication services, and the target terminal is a terminal that supports receiving the non-terrestrial network broadcast message.

9. The method according to claim 8, characterized in that, The early warning request message also includes: the safety early warning level of the public emergency; and broadcasts an early warning message carrying public early warning information corresponding to the public emergency to target terminals within the disaster area based on the early warning request message, including: Determine whether the security warning level is lower than the preset second level; When the security warning level is not lower than the second level, the warning message is broadcast to the target terminal in the disaster area through a preset frequency band, wherein the preset frequency band includes at least: the international mobile communication terrestrial network frequency band or the terrestrial network broadcast dedicated frequency band.

10. A warning message broadcasting system, characterized in that, The early warning message broadcasting system includes at least: a community broadcasting entity, a community broadcasting center, and a non-terrestrial network, wherein... The community broadcast entity is used to send an emergency broadcast request message to the community broadcast center, wherein the emergency broadcast request message includes at least: area identification information of the affected area of ​​the public emergency and public warning information corresponding to the public emergency; The community broadcast center is used to send an early warning request message to the non-terrestrial network based on the emergency broadcast request message; The non-terrestrial network is used to broadcast an early warning message carrying the public early warning information to target terminals within the disaster-stricken area based on the early warning request message. The disaster-stricken area is the area in the affected area where the terrestrial network cannot provide communication services, and the target terminal is a terminal that supports receiving the non-terrestrial network broadcast message.

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