Disaster emergency communication system and disaster emergency communication method

Abstract

The invention provides a disaster emergency communication system and a disaster emergency communication method. The system comprises a user equipment sensing layer, a ground relay network layer and a space-based backhaul link layer. The user equipment sensing layer comprises a plurality of user terminal equipment; the ground relay network layer is used for receiving user information sent by user terminal equipment; the ground relay network layer comprises a fixed relay station and a mobile relay station, both the fixed relay station and the mobile relay station are provided with dual-mode LoRa communication modules, and each dual-mode LoRa module has a single-hop mode and a multi-hop mode; the single-hop mode is used for communicating with user terminal equipment; the multi-hop mode is used for communicating with other relay stations in the ground relay network layer; the space-based backhaul link layer comprises a gateway relay station and a communication satellite, and the gateway relay station is configured to receive the user information transmitted by the ground relay network layer and send the user information to the command and dispatch platform through the communication satellite. Therefore, the problem of'information isolated island 'can be solved, and the communication reliability can be improved.

Description

Technical Field

[0001] This application relates to the field of natural disaster communication technology, and in particular to a disaster emergency communication system and a disaster emergency communication method. Background Technology

[0002] Major natural disasters (such as earthquakes, floods, and mudslides) often lead to devastating damage to infrastructure in disaster areas, resulting in extreme situations of "triple disruption": road closures, power outages, and disruptions to public communication networks (such as 4G / 5G and fiber optics). This prevents information from being transmitted from within the disaster area to the outside world, and external rescue forces are unable to obtain detailed information about the disaster area, creating "information silos" that greatly hinder rescue efficiency and may even lead to secondary disasters.

[0003] Therefore, how to solve the "information silo" problem is an urgent technical issue that needs to be addressed. Summary of the Invention

[0004] In view of this, this application provides a disaster emergency communication system and a disaster emergency communication method to at least solve the technical problems existing in the related technologies.

[0005] According to a first aspect of this application, a disaster emergency communication system is provided, comprising: The user equipment perception layer includes multiple user terminal devices, which are used to perceive user information. A terrestrial relay network layer is used to receive user information sent by the user terminal equipment. The terrestrial relay network layer includes fixed relay stations and mobile relay stations. Both fixed and mobile relay stations are equipped with a dual-mode LoRa communication module. The dual-mode LoRa module has single-hop mode and multi-hop mode. The single-hop mode is used to communicate with the user terminal equipment to receive user information reported by the user terminal equipment. The multi-hop mode is used to communicate with other relay stations in the terrestrial relay network layer to achieve data transmission between different relay stations. The space-based backhaul link layer includes a gateway relay station and a communication satellite. The gateway relay station is configured to receive user information transmitted by the ground relay network layer and send the user information to the command and dispatch platform through the communication satellite.

[0006] In one optional implementation, the dual-mode LoRa communication module operates in the 470~510MHz frequency band and is equipped with two independent antenna interfaces, one of which is used to connect a single-hop mode antenna and the other is used to connect a multi-hop mode antenna.

[0007] In one optional implementation, the fixed relay station is located at a fixed position within the disaster area, and the mobile relay station is mounted on a movable carrier that can move within the disaster area.

[0008] In one optional implementation, the user terminal device includes a LoRa wireless communication module, which operates in single-hop mode and is used to communicate with the nearest relay station in the terrestrial relay network layer.

[0009] In one optional implementation, the gateway relay station is equipped with a satellite communication module, which is used to communicate with the communication satellite, which is a high-throughput communication satellite.

[0010] In one optional implementation, the user information includes user location information and / or user vital signs information.

[0011] In one alternative implementation, the user terminal device includes a wearable device.

[0012] In one alternative implementation, the user terminal device includes a positioning module, a vital signs sensor, and an environmental sensor.

[0013] In one optional implementation, the user terminal device is equipped with an emergency distress button, which is used to generate emergency distress information in response to user triggering.

[0014] According to a second aspect of this application, a disaster emergency communication method is provided, applied to the disaster emergency communication system described in any of the foregoing possible embodiments, the method comprising: For any user terminal device, user information is obtained through the user terminal device, and the user information is sent to the target relay station that is closest to it in the terrestrial relay network layer. The target relay station includes the fixed relay station or the mobile relay station. The target relay station transmits the received user information within the terrestrial relay network layer using a multi-hop mode until it reaches the gateway relay station. The gateway relay station sends the user information to the communication satellite, and then sends the user information to the command and dispatch platform via the communication satellite.

[0015] The disaster emergency communication system provided in this application includes a user equipment perception layer, a ground relay network layer, and a space-based backhaul link layer. The ground relay network layer includes fixed relay stations and mobile relay stations, both of which are equipped with dual-mode LoRa communication modules. This allows for network coverage and information transmission through fixed and mobile relay stations, thus solving the "information silo" problem. Furthermore, due to the long-distance, low-power, and strong penetration characteristics of LoRa (LongRange) communication modules, even in environments with severe power outages, data loss, and network disruptions, the system can cover disaster areas, connect individuals, and bridge the gap between the ground and space. It integrates personal user terminals (people), the ground relay network (ground), and space-based broadband backhaul (space), forming a complete information loop. This enables real-time reporting of disaster information, location monitoring and early warning of affected personnel, and precise issuance of command and dispatch orders, achieving refined perception and efficient command of the disaster situation and comprehensively improving emergency rescue efficiency.

[0016] To make the above-mentioned objects, features and advantages of this disclosure more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. These drawings are incorporated in and constitute a part of this specification. They illustrate embodiments conforming to this disclosure and, together with the specification, serve to explain the technical solutions of this disclosure. It should be understood that the following drawings only show some embodiments of this disclosure and should not be considered as limiting the scope. Those skilled in the art can obtain other related drawings based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the architecture of a disaster emergency communication system shown in an exemplary embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the structure of a user terminal device shown in an exemplary embodiment of this application.

[0020] Figure 3 This is a schematic diagram of the structure of a relay station shown in an exemplary embodiment of this application.

[0021] Figure 4 This is a flowchart illustrating a disaster emergency communication method according to an exemplary embodiment of this application. Detailed Implementation

[0022] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0023] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0024] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0025] In this document, the term "and / or" merely describes a relationship, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0026] All user-related data involved in the technical solution of this application are obtained with the user's authorization, such as through pop-up windows or by inviting individuals to upload their own data.

[0027] Major natural disasters (such as earthquakes, floods, and mudslides) often lead to devastating damage to infrastructure in disaster areas, resulting in extreme situations of "triple disruption": road closures, power outages, and disruptions to public communication networks (such as 4G / 5G and fiber optics). This prevents information from being transmitted from within the disaster area to the outside world, and external rescue forces are unable to obtain detailed information about the disaster area, creating "information silos" that greatly hinder rescue efficiency and may even lead to secondary disasters.

[0028] Research has revealed that current emergency communication methods primarily include satellite phones, shortwave / ultra-shortwave radios, and mesh (wireless mesh network) self-organizing devices. However, these methods have significant limitations. First, while satellite phones enable global communication, their terminal equipment is expensive, limited in quantity, and incurs high communication costs, making widespread distribution to disaster-stricken populations impossible. Furthermore, signal quality is poor in confined spaces or in inclement weather. Second, traditional radio stations have limited communication range and heavily rely on repeaters, which struggle to operate continuously during power outages and cannot achieve large-scale terminal access or refined management. Additionally, mesh self-organizing devices typically operate at higher frequencies, resulting in poor diffraction capabilities, shorter transmission distances, limited coverage in complex terrain, and severely restricted terminal battery life due to high power consumption.

[0029] Based on the above research, this application provides a disaster emergency communication system, including a user equipment sensing layer, a ground relay network layer, and a space-based backhaul link layer. The ground relay network layer includes fixed relay stations and mobile relay stations, both of which are equipped with dual-mode LoRa communication modules. This allows for network coverage and information transmission through fixed and mobile relay stations, thus solving the "information silo" problem. Furthermore, due to the long-distance, low-power, and strong penetration characteristics of LoRa (Long Range) communication modules, in extreme disaster environments, individual information (people), ground relay nodes (ground), and space-based satellite communication (space) can be organically integrated to form a complete, reliable, and flexibly deployable disaster emergency communication system.

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Please see Figure 1 , Figure 1 This is a schematic diagram of the architecture of a disaster emergency communication system provided in an embodiment of this application. Figure 1 As shown, the disaster emergency communication system 100 includes a user equipment sensing layer 10, a ground relay network layer 20, and a space-based backhaul link layer 30. The user equipment sensing layer 10 includes multiple user terminal devices. These user terminal devices are used to sense user information. The ground relay network layer 20 is used to receive user information sent by the user terminal devices. Specifically, the ground relay network layer 20 includes fixed relay stations and mobile relay stations, both of which are equipped with dual-mode LoRa communication modules (…). Figure 1(Not shown). The dual-mode LoRa module has a single-hop mode (also known as LoRa One mode) and a multi-hop mode (also known as LoRa Mesh mode). The single-hop mode is used to communicate with the user terminal device to receive user information reported by the user terminal device. The multi-hop mode is used to communicate with other relay stations in the terrestrial relay network layer 20 to realize data transmission between different relay stations.

[0032] Specifically, the dual-mode LoRa module supports two operating modes. LoRa One mode is used to communicate with user terminal devices within range and receive data packets reported by them. LoRa One mode features low power consumption and long-distance transmission, maximizing the battery life of terminal devices. LoRa Mesh mode is used to build a self-organizing, self-healing multi-hop mesh network between various ground relay stations. This mode enables flexible information transmission and routing between relay devices. When a relay station receives data from a user terminal, it can relay the data through the mesh network to a gateway node connected to satellite communication equipment, effectively extending network coverage and improving system reliability.

[0033] The space-based backhaul link layer 30 includes a gateway relay station and a communication satellite. The gateway relay station is configured to receive user information transmitted by the ground relay network layer 20 and send the user information to the command and dispatch platform through the communication satellite.

[0034] It should be noted that, Figure 1 The diagram illustrates the bidirectional flow of data. Uplink data (dashed arrows) originates from the user equipment's perception layer 10, undergoes multiple hops of wireless transmission through the terrestrial relay network layer 20, and finally reaches the command and dispatch platform via the space-based backhaul link layer 30. Downlink commands (dashed arrows) travel along the opposite path from the command and dispatch platform to the forward command post or relay equipment. Solid arrows represent physical wired connections between devices.

[0035] The disaster emergency communication system 100 provided in this application embodiment achieves communication capability from scratch under extreme conditions through LoRa self-organizing network and satellite communication. Furthermore, the long-range characteristics of LoRa combined with the multi-hop relay capability of Mesh network can effectively cover large areas. In addition, rapid deployment and blind spot coverage can be achieved through mobile relay stations.

[0036] In some embodiments, the user terminal device may include wearable devices, such as wristbands or watches, for the convenience of disaster victims or rescue personnel. In other embodiments, the user terminal device may be a portable terminal device such as a power bank or mobile phone.

[0037] See Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a user terminal device provided in an embodiment of this application. Figure 2 As shown, in some embodiments, the user terminal device includes a LoRa wireless communication module 11. The LoRa wireless communication module 11 operates in single-hop mode and is used to communicate with the nearest relay station in the terrestrial relay network layer 20. Exemplarily, the user terminal device can operate in LoRa One mode (point-to-point or star network mode), which has the advantages of low power consumption and long-distance communication, significantly extending the battery life of the terminal device and meeting the needs of long-term operation in disaster environments.

[0038] In this embodiment, the LoRa wireless communication module 11 operates in LoRa One mode, possessing high receiving sensitivity and strong penetration, and is responsible for transmitting all collected and generated data to the nearest ground relay station in a low-power, long-distance manner. The LoRa wireless communication module 11 is connected to a dedicated LoRa antenna.

[0039] In some embodiments, the user terminal device further includes a data acquisition module 12. Exemplarily, the data acquisition module 12 may include a positioning module, a vital signs sensor, and an environmental sensor, etc. The user information may include user location information and / or user vital signs information.

[0040] Specifically, the positioning module may include GPS (Global Positioning System) and BeiDou Navigation Satellite System to obtain the user's location. Vital signs sensors may integrate sensors such as heart rate and body temperature sensors to monitor the user's physiological state. Environmental sensors may optionally integrate sensors such as air pressure and temperature sensors to assist in disaster environment monitoring. In addition, the user terminal device may also include a miniature vibration motor for tactile feedback when receiving notifications and alarms; and a miniature OLED (Organic Light Emitting Diode Display) screen to display battery level, status, commands, or QR code information.

[0041] Optionally, the user terminal device further includes an emergency distress button 13, which is used to generate emergency distress information in response to user triggering. It should be noted that the emergency distress button 13 is used by the user to actively trigger the highest priority alarm signal in an emergency.

[0042] For example, the user terminal device can access the nearest ground relay station in a star network manner through the LoRa wireless communication module 11 to report its own location, user vital signs and distress information.

[0043] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the user terminal device. In other embodiments of this application, the user terminal device may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0044] In some embodiments, the fixed relay station is located at a fixed position within the disaster area, and the mobile relay station is mounted on a movable carrier that can be moved within the disaster area. The fixed relay station refers to a fixed relay station without a satellite terminal. It can be a portable device, desktop-mounted, wall-mounted, or pole-mounted, and can be deployed at pre-selected high points or key buildings (such as command centers or shelters) within the disaster area. For example, the dimensions of a fixed relay station can be 490×200×85 mm, and its weight can be 2 kg. Optionally, the fixed relay station can support 470~510MHz channel communication.

[0045] In addition, the fixed repeater station can be equipped with one 10 / 100 / 1000 Mbps Ethernet port (supporting 802.3af standard PoE power reception), with full-duplex / half-duplex adaptive transmission mode. Power supply options include solar panel power, DC-12V external power, and a built-in 9000mAh battery, providing self-powered capability and adaptability to power outages. The mobile repeater station (similar to the fixed station) is also a portable device that can be handheld, vehicle-mounted, or mounted on drones / unmanned vehicles for mobile deployment. Its hardware is similar to the fixed repeater station, but it is primarily powered by batteries, further enhancing mobility and environmental adaptability.

[0046] See Figure 3 As shown, Figure 3 This is a schematic diagram illustrating the structure of a relay station (fixed or mobile) according to an embodiment of this application. Figure 3 As shown, this fixed / mobile repeater station includes a main processor, a dual-mode LoRa communication module, a power management module, a GPS module, and a gigabit Ethernet interface. The main processor, as the system's control core, executes network routing protocols, data protocol conversion, device control, and computational tasks. The dual-mode LoRa communication module operates in the 470-510MHz frequency band. This module connects to the main processor via an internal bus and has two independent external antenna interfaces: one for connecting a single-hop mode antenna and the other for connecting a multi-hop mode antenna. Specifically, one antenna interface connects to a LoRa One mode antenna for communication with user terminal equipment, and the other connects to a LoRa Mesh mode antenna for networking with other repeater stations.

[0047] The main processor may be an integrated circuit chip with signal processing capabilities. The aforementioned processor can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor.

[0048] In some embodiments, the power management module is responsible for intelligent switching and management of multiple power sources. Its input can be connected to a solar charging interface, a DC-12V external power input interface, and a built-in battery, while its output distributes power to various functional modules within the system.

[0049] The GPS module provides precise positioning information for the ground relay station and includes an external GPS antenna interface. The Gigabit Ethernet interface provides a 10 / 100 / 1000 Mbps adaptive Ethernet port, supporting 802.3af PoE power supply, for wired network backup connections and connections to external satellite communication terminals.

[0050] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the relay station. In other embodiments of this application, the relay station may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0051] The space-based backhaul link layer 30 serves as an air backbone channel for data exchange with the remote rear command and dispatch platform and the forward command post. For example, the gateway relay station can be deployed at a high point in the disaster area or at the forward command post, responsible for transmitting aggregated data from the disaster area back to the rear cloud platform at high speed and stably, and receiving command and dispatch instructions from the rear.

[0052] In some embodiments, the gateway relay station is equipped with a satellite communication module for communicating with the communication satellite, which is a high-throughput communication satellite. Here, the structure of the gateway relay station can be similar to the aforementioned fixed / mobile relay station structure, except that the gateway relay station also integrates a satellite communication module to provide a control and data interface for the high-throughput communication satellite. This satellite communication module can connect to the main processor and antenna via an Ethernet interface to establish a space-based backhaul link.

[0053] See Figure 4 As shown, Figure 4 This is a flowchart illustrating a disaster emergency communication method provided in an embodiment of this application. The method is applied to the disaster emergency communication system described in any of the foregoing embodiments. The method includes the following steps S101-S103: S101, for any user terminal device, obtain the user's user information through the user terminal device, and send the user information to the target relay station closest to it in the ground relay network layer, the target relay station including the fixed relay station or the mobile relay station.

[0054] S102, the target relay station transmits the received user information in the ground relay network layer through a multi-hop mode until it reaches the gateway relay station.

[0055] S103, the gateway relay station sends the user information to the communication satellite, and then sends the user information to the command and dispatch platform through the communication satellite.

[0056] Here, the data collected by the user terminal device may include location, vital signs, or SOS signals; it is then wirelessly transmitted via LoRa One mode; the nearest ground relay station receives the data and processes it internally; the processed data is transmitted through multiple relays within the network via LoRa Mesh mode until it reaches the gateway relay station; the gateway relay station packages and uploads the data via a satellite communication module; the communication satellite receives and forwards the data; finally, the command and dispatch platform receives, parses, and presents the data, completing the entire command and dispatch closed loop.

[0057] The disaster emergency communication system 100 and disaster emergency communication method provided in this application embodiment can cover disaster areas, connect individuals, and connect the sky and the earth in the "three-disruption" environment. It integrates personal terminals (people), flexible ground relay networks (ground), and space-based broadband backhaul (sky) into one, forming a complete information closed loop. This enables real-time reporting of disaster information, location monitoring and early warning of disaster-stricken personnel, and precise issuance of command and dispatch orders. It achieves refined perception of the disaster area situation and efficient command, and comprehensively improves the efficiency of emergency rescue.

[0058] Those skilled in the art will understand that, in the above-described method of the specific implementation, the order in which each step is written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0059] This disclosure also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the steps of the disaster emergency communication method described in the above-described method embodiments. The storage medium can be either volatile or non-volatile computer-readable storage.

[0060] This disclosure also provides a computer program product carrying program code. The program code includes instructions that can be used to execute the steps of the disaster emergency communication method in the above method embodiments. For details, please refer to the above method embodiments, which will not be repeated here.

[0061] The aforementioned computer program product can be implemented through hardware, software, or a combination thereof. In one optional embodiment, the computer program product is specifically embodied in a computer storage medium; in another optional embodiment, the computer program product is specifically embodied in a software product, such as a software development kit (SDK), etc.

[0062] Furthermore, embodiments of the subject matter and functional operation described in this specification can be implemented in the following ways: digital electronic circuits, tangibly embodied computer software or firmware, computer hardware including the structures disclosed in this specification and their structural equivalents, or combinations thereof. Embodiments of the subject matter described in this specification can be implemented as one or more computer programs, i.e., one or more modules of computer program instructions encoded on a tangible, non-transitory program carrier for execution by a data processing apparatus or for controlling the operation of a data processing apparatus. Alternatively or additionally, program instructions may be encoded on artificially generated propagation signals, such as machine-generated electrical, optical, or electromagnetic signals, which are generated to encode information and transmit it to a suitable receiving device for execution by the data processing apparatus. The computer storage medium may be a machine-readable storage device, a machine-readable storage substrate, a random or serial access memory device, or combinations thereof.

[0063] The processing and logic flow described in this specification can be executed by one or more programmable computers that execute one or more computer programs to perform corresponding functions by operating on input data and generating output. The processing and logic flow can also be executed by dedicated logic circuitry—such as FPGAs (Field-Programmable Gate Arrays) or ASICs (Application-Specific Integrated Circuits), and the device can also be implemented as dedicated logic circuitry.

[0064] Suitable computers for executing computer programs include, for example, general-purpose and / or special-purpose microprocessors, or any other type of central processing unit. Typically, the central processing unit receives instructions and data from read-only memory and / or random access memory. The basic components of a computer include a central processing unit for implementing or executing instructions and one or more memory devices for storing instructions and data. Typically, a computer will also include one or more mass storage devices for storing data, such as disks, magneto-optical disks, or optical disks, or the computer will be operatively coupled to such mass storage devices to receive data from or transfer data to them, or both. However, a computer is not required to have such devices. Furthermore, a computer can be embedded in another device, such as a mobile phone, a personal digital assistant (PDA), a mobile audio or video player, a game console, a global positioning system (GPS) receiver, or a portable storage device such as a universal serial bus (USB) flash drive, to name a few.

[0065] Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, such as semiconductor memory devices (e.g., EPROM, EEPROM, and flash memory devices), magnetic disks (e.g., internal hard disks or removable disks), magneto-optical disks, and CD-ROM and DVD-ROM disks. Processors and memory may be supplemented by or incorporated into dedicated logic circuitry.

[0066] While this specification contains numerous specific implementation details, these should not be construed as limiting the scope of any invention or the scope of the claims, but rather are primarily intended to describe features of specific embodiments of a particular invention. Certain features described in the various embodiments herein may also be implemented in combination in a single embodiment. Conversely, various features described in a single embodiment may also be implemented separately in various embodiments or in any suitable sub-combination. Furthermore, while features may function in certain combinations as described above and even initially claimed in this way, one or more features from a claimed combination may be removed from that combination in some cases, and a claimed combination may refer to a sub-combination or a variation thereof.

[0067] Similarly, although the operations are depicted in a specific order in the accompanying drawings, this should not be construed as requiring these operations to be performed in the specific order shown or sequentially, or requiring all illustrated operations to be performed to achieve the desired result. In some cases, multitasking and parallel processing may be advantageous. Furthermore, the separation of various system modules and components in the above embodiments should not be construed as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

[0068] Thus, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the appended claims. In some cases, the actions recited in the claims may be performed in a different order and still achieve the desired result. Furthermore, the processes depicted in the drawings are not necessarily shown in a specific order or sequence to achieve the desired result. In some implementations, multitasking and parallel processing may be advantageous.

[0069] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A disaster emergency communication system, characterized in that, include: The user equipment perception layer includes multiple user terminal devices, which are used to perceive user information. The terrestrial relay network layer is used to receive user information sent by the user terminal equipment. The terrestrial relay network layer includes fixed relay stations and mobile relay stations. Both the fixed and mobile relay stations are equipped with dual-mode LoRa communication modules. The dual-mode LoRa modules have single-hop mode and multi-hop mode. The single-hop mode is used to communicate with the user terminal equipment to receive user information reported by the user terminal equipment. The multi-hop mode is used to communicate with other relay stations in the ground relay network layer to enable data transmission between different relay stations; The space-based backhaul link layer includes a gateway relay station and a communication satellite. The gateway relay station is configured to receive user information transmitted by the ground relay network layer and send the user information to the command and dispatch platform through the communication satellite.

2. The system according to claim 1, characterized in that, The dual-mode LoRa communication module operates in the 470~510MHz frequency band and is equipped with two independent antenna interfaces. One antenna interface is used to connect a single-hop mode antenna, and the other antenna interface is used to connect a multi-hop mode antenna.

3. The system according to claim 1 or 2, characterized in that, The fixed relay station is set up at a fixed location within the disaster area, and the mobile relay station is set up on a mobile carrier that can move within the disaster area.

4. The system according to claim 1, characterized in that, The gateway relay station is equipped with a satellite communication module, which is used to communicate with the communication satellite, which is a high-throughput communication satellite.

5. The system according to claim 1, characterized in that, The user terminal device includes a LoRa wireless communication module, which operates in single-hop mode and is used to communicate with the nearest relay station in the terrestrial relay network layer.

6. The system according to claim 1, characterized in that, The user information includes user location information and / or user vital signs information.

7. The system according to claim 1, characterized in that, The user terminal equipment includes wearable devices.

8. The system according to claim 1, characterized in that, The user terminal device includes a positioning module, a vital signs sensor, and an environmental sensor.

9. The system according to claim 1, characterized in that, The user terminal device is equipped with an emergency distress button, which is used to generate emergency distress information in response to user triggering.

10. A disaster emergency communication method, characterized in that, The method, applied to the disaster emergency communication system according to any one of claims 1-9, comprises: For any user terminal device, user information is obtained through the user terminal device, and the user information is sent to the target relay station that is closest to it in the ground relay network layer. The target relay station includes the fixed relay station or the mobile relay station. The target relay station transmits the received user information within the terrestrial relay network layer using a multi-hop mode until it reaches the gateway relay station. The gateway relay station sends the user information to the communication satellite, and then sends the user information to the command and dispatch platform via the communication satellite.

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