Emergency communication system

Abstract

The embodiment of the invention discloses an emergency communication system. The emergency communication system comprises a main control chip and a communication module, the main control chip is connected with the communication module for communication interaction; wherein the communication module comprises a plurality of communication sub-modules, and each communication sub-module comprises an Ethernet communication sub-module, a mobile communication sub-module, a broadband communication sub-module and a narrowband communication sub-module which are sequentially arranged from high to low according to communication priorities; and the main control chip screens a target communication sub-module from the communication sub-modules according to the connection state and the communication priority of each communication sub-module, the communication environment of the emergency communication site and the service transmission requirement in the emergency communication, and carries out service resource allocation on network resources of the target communication sub-module. The main control chip carries a plurality of communication sub-modules to realize network convergence and cooperation, and dynamically distributes network resources to ensure the communication quality during emergency communication.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular, to an emergency communication system. Background Art

[0002] In some special scenarios, such as earthquake relief, fire rescue, and life search and other emergency scenarios, it is necessary to ensure communication in the emergency scenarios, such as the communication between the rescue party and the command party, or the communication between Internet of Things devices or Bluetooth devices in the emergency scenario.

[0003] The emergency communication systems in the prior art usually only support a single network type, and each network works independently. It is difficult to deeply integrate and intelligently switch between different networks. Moreover, the allocation of network resources in the prior art usually adopts a fixed allocation strategy and cannot perform dynamic allocation of network resources, thus unable to ensure emergency communication. Summary of the Invention

[0004] The present invention provides an emergency communication system to achieve network integration and collaboration, and perform dynamic allocation of network resources for each network to ensure the communication quality during emergency communication.

[0005] According to an aspect of the present invention, there is provided an emergency communication system, which includes: a main control chip and a communication module; the main control chip is connected to the communication module for communication interaction; wherein, the communication module includes a plurality of communication sub-modules, and the communication sub-modules are arranged in descending order of communication priority as: an Ethernet communication sub-module, a mobile communication sub-module, and a broadband and narrowband communication sub-module;

[0006] The main control chip screens a target communication sub-module among the communication sub-modules according to the connection status of each communication sub-module, the communication priority, the communication environment at the emergency communication site, and the service transmission requirements in the emergency communication, and performs service resource allocation on the network resources of the target communication sub-module.

[0007] Optionally, the broadband communication sub-module of the broadband and narrowband communication sub-module includes: a signal monitoring sensor and a data monitoring and analyzer; the broadband communication sub-module operates in at least two frequency bands;

[0008] The signal monitoring sensor performs signal scanning and monitoring on multiple frequency bands in which the broadband communication sub-module operates to obtain signal quality information of each frequency band;

[0009] The data monitoring and analyzer obtains the service transmission requirements and service transmission priorities transmitted by the main control chip, analyzes the service transmission requirements, and determines the target signal quality required for service transmission;

[0010] The data monitoring and analyzer receives the signal quality information of each frequency band determined by the signal monitoring sensor, and determines the target frequency band for the broadband communication sub-module to operate according to the target signal quality, service transmission priority, and the signal quality information of each frequency band, and performs frequency band switching.

[0011] Optionally, the broadband communication sub-module uses a multiple-input multiple-output antenna array in each frequency band to enhance the signal;

[0012] The broadband communication sub-module fuses the antenna signals received by multiple antennas according to the antenna weights of multiple receiving antennas to obtain a target received signal.

[0013] Optionally, the narrowband communication sub-module of the broadband and narrowband communication sub-module communicates using a wide area network;

[0014] The narrowband communication sub-module monitors the usage and channel quality of each channel in the wide area network, and switches the channels of the accessed Internet of Things devices according to the usage and channel quality of the channels;

[0015] The narrowband communication sub-module adjusts the transmission rate according to the device communication requirements of the accessed Internet of Things device, the channel quality of the switched-to channel, and the device power of the Internet of Things device.

[0016] Optionally, the broadband and narrowband communication sub-module works in cooperation with a radio frequency power amplifier;

[0017] The radio frequency power amplifier obtains the environmental information of the emergency communication site through an environmental sensor, and receives the service transmission requirements transmitted by the main control chip; according to the environmental information and the service transmission requirements, it adjusts the transmission power when the broadband and narrowband communication sub-module transmits data.

[0018] Optionally, the mobile communication sub-module includes: at least two generations of mobile communication networks, and a network perception and decision maker;

[0019] The network perception and decision maker monitors the network signal quality of each generation of mobile communication networks, and obtains the service transmission requirements transmitted by the main control chip; according to the network signal quality, the service transmission requirements, and the preconditions for network switching, it performs network switching among each generation of mobile communication networks;

[0020] When performing network switching, during the process of establishing a connection with the target generation of mobile communication network, the service data being transmitted is temporarily cached in the memory of the main control chip; and when a connection with the target generation of mobile communication network is successfully established, the data transmission path is switched to the target generation of mobile communication network for breakpoint resumption of data transmission;

[0021] After network switching, the network awareness and decision-making device monitors the network signal quality of the target generation mobile communication network, and determines that the target generation mobile communication network meets the precondition for network switching when the network signal quality is lower than the preset signal quality threshold and the duration reaches the preset time threshold.

[0022] Optionally, the system further includes a positioning module; the positioning module includes at least two positioning sub-modules, and each positioning sub-module independently obtains the actual observation parameters of the base station position.

[0023] The positioning module obtains satellite signal prediction parameters according to the orbital model of the satellite and the motion state of the base station during positioning.

[0024] The positioning module compares the actual observation parameters of each positioning sub-module with the prediction parameters to obtain the observation residual.

[0025] According to the prediction error covariance matrix, observation matrix and preset noise covariance matrix corresponding to the positioning sub-module, the Kalman gain of the prediction parameters is determined.

[0026] The prediction parameters are corrected according to the Kalman gain and the observation residual to obtain the fused position information of the base station, so as to perform path planning in emergency communication according to the fused position information.

[0027] Optionally, the system further includes: an emergency power supply; the emergency power supply includes a lithium-ion battery pack, a super capacitor and an external solar panel.

[0028] When the input power supply of the emergency power supply is normal, the emergency power supply supplies power to the main control chip through the input power supply, and charges the lithium-ion battery pack and the super capacitor through the input power supply.

[0029] When the input power supply of the emergency power supply is interrupted, the emergency power supply supplies power to the main control chip through the lithium-ion battery pack, the super capacitor or the external solar panel.

[0030] Optionally, the system further includes: a Bluetooth module.

[0031] The main control chip is bidirectionally connected to the Bluetooth module, and the main control chip performs Bluetooth device self-networking through the Bluetooth module and transmits data through the Bluetooth device self-networking.

[0032] Optionally, the system further includes: an anti-disassembly module.

[0033] The anti-disassembly module uses a three-axis acceleration sensor to monitor the physical state of the device and environmental change information in the emergency communication system, and determines the disassembly state of the emergency communication system according to the physical state of the device and environmental change information.

[0034] When the anti-disassembly module determines that the emergency communication system is in a disassembled state, it sends an alarm message to the main control chip through an encrypted communication link;

[0035] The main control chip performs a system emergency protection strategy based on the alarm message.

[0036] The technical solution of the embodiment of the present invention is to set up an emergency communication system including a main control chip and a communication module. The main control chip is connected to the communication module for communication interaction. Among them, the communication module includes multiple communication sub-modules. The communication sub-modules are arranged in descending order of communication priority as: Ethernet communication sub-module, mobile communication sub-module, and broadband and narrowband communication sub-module. The main control chip screens the target communication sub-module among the communication sub-modules according to the connection status, communication priority, communication environment at the emergency communication site, and service transmission requirements in the emergency communication, and allocates service resources to the network resources of the target communication sub-module, which solves the problem that the communication network is unreliable in the emergency communication scenario and cannot cooperate to ensure the communication quality. By equipping the main control chip with multiple communication sub-modules, network integration and cooperation can be achieved, and dynamic allocation of each network resource can be performed to ensure the communication quality during emergency communication.

[0037] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Brief Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0039] Figure 1 is a schematic structural diagram of an emergency communication system provided according to an embodiment of the present invention;

[0040] Figure 2 is a schematic structural diagram of another emergency communication system provided according to an embodiment of the present invention. Detailed Embodiments

[0041] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0043] Figure 1 is a schematic structural diagram of an emergency communication system provided according to an embodiment of the present invention. This embodiment is applicable to the situation of ensuring network communication quality in an emergency scenario. As Figure 1 shown, the system includes: a main control chip 100 and a communication module 200; the main control chip 100 is connected to the communication module 200 for communication interaction; among them, the communication module 200 includes a plurality of communication sub-modules, and the communication sub-modules are arranged in descending order of communication priority as: an Ethernet communication sub-module 210, a mobile communication sub-module 220, and a broadband and narrowband communication sub-module 230.

[0044] The main control chip 100 screens the target communication sub-module among the communication sub-modules according to the connection status, communication priority, communication environment at the emergency communication site, and service transmission requirements in the emergency communication, and allocates service resources to the network resources of the target communication sub-module.

[0045] Specifically, when all the communication sub-modules are connected to the main control chip and the communication quality is good, communication can be carried out first through the Ethernet communication sub-module; if the Ethernet communication sub-module is disconnected, communication can be carried out through the mobile communication sub-module; if the mobile communication sub-module is also disconnected, communication can be carried out through the broadband and narrowband communication sub-modules in cooperation to ensure smooth network in the emergency communication scenario.

[0046] The main control chip is the core component of the emergency communication system. The main control chip can uniformly schedule the communication modules. The main control chip can be built based on a high-performance multi-core processor. An embedded real-time operating system (such as Linux) can run in the main control chip. The main control chip has powerful computing and multitasking capabilities and can coordinate and manage the work of each communication sub-module in the emergency communication system.

[0047] The main control chip realizes high-speed communication with the communication sub-modules through various interfaces, and can monitor the operating status of each communication sub-module in real time, perform precise configuration management, and efficiently forward data. Software-Defined Networking (SDN) and Network Functions Virtualization (NFV) technologies can be applied in the main control chip. The main control chip can dynamically allocate and schedule network resources according to the service transmission requirements in the emergency scenario. Thus, the base station can flexibly deploy various network services and applications to meet the communication needs in different emergency situations. In addition, the main control chip also supports remote management and online upgrade, which facilitates the maintenance personnel to optimize the system performance and update functions in a timely manner to ensure that the base station always maintains the best operating state.

[0048] The main control chip can utilize SDN and NFV technologies to achieve dynamic intelligent allocation and flexible scheduling of network resources. The SDN technology enables the main control chip to centrally control network traffic and dynamically allocate network resources according to the service transmission requirements, the real-time connection status of the network, and the communication environment at the emergency communication site, such as network congestion, available bandwidth of each link, signal strength, etc. The NFV technology virtualizes network functions, enabling network resources to be configured and managed as flexibly as software. Thus, by using SDN and NFV technologies, the main control chip can screen the target communication sub-modules among each communication sub-module according to the connection status, communication priority, communication environment at the emergency communication site, and service transmission requirements in the emergency communication, and perform service resource allocation for the network resources of the target communication sub-module.

[0049] Through SDN and NFV technologies, the main control chip can adjust the allocation of network resources according to the service transmission requirements (such as different requirements for bandwidth and latency for high-definition video transmission, ordinary text data transmission, etc.), the connection status of each communication sub-module, the communication priority, and the communication environment at the emergency communication site (such as network congestion, available bandwidth of each link, signal strength, etc.) to ensure the communication quality of critical services.

[0050] For example, at the emergency rescue site, when the rescue command center initiates a high-definition video conference, the main control chip can, through real-time monitoring of the network status, detect that the current network bandwidth is tight. At this time, by using SDN and NFV technologies, more network resources can be allocated to the video conference service, and at the same time, the priority and bandwidth allocation of non-critical services (such as ordinary file downloads) can be appropriately reduced. On the premise of ensuring critical services, network resources can be reasonably utilized.

[0051] After the business resource allocation of the network resources of the target communication sub-module, the main control chip can also continuously monitor the connection status, communication priority, communication environment at the emergency communication site, and the service transmission requirements in the emergency communication, and adjust and optimize the allocation strategy according to the actual effect. For example, if it is found that a certain service still cannot meet the requirements after resource allocation, or there is idle network resource, the main control chip can re-allocate resources to improve the utilization rate of network resources and the communication quality of services.

[0052] By introducing hardware virtualization technology, the main control chip can build multiple isolated virtual environments at the hardware level, allowing different network functions and application programs to run independently in their respective virtual environments. This isolation mechanism greatly improves the security and stability of the system, avoids interference between different functions and programs, and reduces the risk of the entire system crashing due to a failure or attack in a certain part.

[0053] To ensure the stable operation of the emergency communication system and the secure storage of data, a large-capacity high-speed memory and a reliable storage device can be equipped in the main control chip. The memory can provide sufficient space for the real-time operation of the operating system and various application programs to ensure the response speed of the emergency communication system. The storage device is used to store key information such as the operating system, application programs, and configuration data to prevent data loss and lay a foundation for the continuous and stable operation of the base station.

[0054] Figure 2 It is a schematic diagram of the structure of another emergency communication system provided according to an embodiment of the present invention. As Figure 2 shown, in the embodiment of the present invention, the Ethernet communication sub-module can be equipped with two Gigabit Ethernet interfaces. The main control chip can perform high-speed data transmission with external network devices (such as routers, switches, etc.) through the two Gigabit Ethernet interfaces to ensure the stability of data transmission. Through the Gigabit Ethernet interfaces, the main control chip can realize the connection between the base station and the wired network to meet the requirements for network connection methods in different emergency scenarios. For example, in fixed locations or areas with wired network coverage, Gigabit Ethernet can be used for data transmission.

[0055] The Ethernet communication sub-module can adopt a high-performance network processor (NP) and hardware acceleration technology, integrate a hardware firewall and traffic optimization functions, and improve the network data processing speed, security and stability. The Ethernet communication sub-module can support link aggregation and redundancy backup strategies through two Gigabit Ethernet interfaces, and can be configured as a link aggregation mode to increase bandwidth or a redundancy backup mode to improve reliability, and efficiently exchange data through an intelligent switch chip and a main control chip to ensure stable communication between the base station and the core network device.

[0056] In the embodiment of the present invention, the mobile communication sub-module may include at least two generations of mobile communication networks, such as at least two generations of mobile communication networks among the second-generation mobile communication (2G), third-generation mobile communication (3G), fourth-generation mobile communication (4G), and fifth-generation mobile communication (5G). For example, the mobile communication sub-module can be compatible with 4G LTE and 5G NR communication standards. In the emergency communication system, network switching can be performed among generations of mobile communication networks according to service transmission requirements.

[0057] As Figure 2 shown, optionally, in the embodiment of the present invention, the mobile communication sub-module includes: at least two generations of mobile communication networks, and a network perception and decision maker. The network perception and decision maker can perform network switching among generations of mobile communication networks according to the obtained network signal quality and service transmission requirements.

[0058] Specifically, the network perception and decision maker monitors the network signal quality of generations of mobile communication networks, and obtains the service transmission requirements transmitted by the main control chip; and performs network switching among generations of mobile communication networks according to the network signal quality, service transmission requirements, and preconditions for network switching.

[0059] The surrounding environment of the emergency rescue site is complex, and the network signal is easily interfered. Therefore, it is necessary to master the network status in real time and accurately. The network perception and decision maker can automatically and smoothly switch between 4G and 5G networks according to the real-time network signal strength, quality, and service transmission requirements to ensure communication continuity and efficiency. Among them, the network signal quality includes, but is not limited to, signal-to-noise ratio, bit error rate, network latency, and packet loss rate, etc. The mobile communication sub-module supports carrier aggregation technology to improve data transmission rate and network capacity.

[0060] Meanwhile, the mobile communication sub-module can interact with the main control chip at high speed through the PCIE interface to achieve fast data transmission and dynamic adjustment of network configuration. The network perception and decision maker interacts with the main control chip at high speed through the PCIE interface, and can obtain the service transmission requirements of the current service. For example, during a high-definition video conference in an emergency command center, the main control chip can transmit information about the high requirements of the service for network bandwidth and low latency to the network perception and decision maker. When performing simple emergency data reporting, the main control chip can transmit the relatively low requirements of the service for the network to the network perception and decision maker.

[0061] The network perception and decision maker can combine the monitored network signal quality and the obtained service transmission requirements for evaluation and decision-making to determine whether to perform network switching. When evaluating network switching, the network perception and decision maker can also consider whether the network communication meets the preconditions for network switching. Among them, the preconditions can be set to avoid frequent network switching. For example, when the network signal quality is lower than the preset signal quality threshold and the duration reaches the preset time threshold, it can be determined that the preconditions for network switching are met.

[0062] In the emergency communication scenario, the requirements for network reliability and real-time performance are extremely high. For example, when the 5G network signal strength is higher than the set switching threshold (such as -90dBm), and the signal quality is good (such as the bit error rate is lower than 0.1% and the signal-to-noise ratio is higher than 20dB), and at the same time the current service belongs to the type with high requirements for high rate and low latency (such as remote medical consultation at the emergency site, remote control of large rescue equipment, etc.), the network perception and decision maker can determine that the network switching conditions are met and tend to switch to the 5G network to meet the efficient communication needs of emergency services. On the contrary, if the 5G network signal strength is weak (such as lower than -110dBm), the signal quality is poor (such as the bit error rate is higher than 1% and the signal-to-noise ratio is lower than 15dB), resulting in high network latency (such as exceeding 100ms) and serious packet loss (such as the packet loss rate is higher than 5%), while the 4G network is relatively stable and can meet the basic needs of the current service (such as text transmission of emergency material information, simple voice calls, etc.), the network perception and decision maker can determine to switch back to the 4G network to ensure communication stability.

[0063] When performing network switching, during the process of establishing a connection with the target generation mobile communication network, the service data being transmitted currently is temporarily cached in the memory of the main control chip; and when a successful connection is established with the target generation mobile communication network, the data transmission path is switched to the target generation mobile communication network for breakpoint resumption of data transmission.

[0064] When it is determined to perform a network handover, the mobile communication sub-module can execute a series of operations to ensure communication continuity. For example, when switching from 4G to 5G network, the mobile communication sub-module can utilize carrier aggregation technology to first select appropriate carrier resources on the 5G network to initiate a connection request and attempt to establish a communication link with the 5G base station. During the connection establishment process, it works in coordination with the main control chip to temporarily cache the currently transmitted data in the memory of the main control chip such as EMMC to avoid data loss. Once the 5G network connection is successfully established, it cooperates with the main control chip through the PCIE interface to smoothly switch the data transmission path to the 5G network and continue with the resume of data transmission from the breakpoint.

[0065] The process of switching from 5G to 4G network is similar. First, establish a connection on the 4G network and then switch the data transmission path.

[0066] Meanwhile, in the embodiments of the present invention, a multi-Subscriber Identity Module (SIM) redundant backup and intelligent switching mechanism can also be adopted. If there is a problem with the network corresponding to the current SIM card, it automatically switches to the network corresponding to the standby SIM card to ensure the reliability of the network connection.

[0067] To prevent frequent network handovers, after the network handover, the network awareness and decision maker monitors the network signal quality of the target generation mobile communication network, and determines that the target generation mobile communication network meets the preconditions for network handover when the network signal quality is lower than the preset signal quality threshold and the duration reaches the preset time threshold.

[0068] In emergency communication, the stability of the network is crucial, and frequent handovers may cause communication interruptions. For example, after switching from 4G to 5G network, the 5G network signal strength needs to be reduced to a value lower than the handover threshold (such as the preset signal quality threshold is -100 dBm) and last for a period of time (such as the preset time threshold is 8 seconds) before considering switching back to the 4G network.

[0069] In addition, after the handover is completed, the network awareness and decision maker can continuously monitor the performance metrics of the new network. If it is found that the performance of the switched network does not meet the expectations, it can cooperate with the main control chip to decide whether to perform another network handover or take other optimization measures according to the actual situation, such as adjusting the network resource allocation through SDN and NFV technologies to improve the network performance.

[0070] The main control chip and the mobile communication sub-module are bidirectionally connected through a specific interface. The main control chip can control the working state of the mobile communication sub-module, such as operations like network mode switching and signal strength monitoring. The mobile communication sub-module then transmits the data obtained from the external network to the main control chip, and at the same time receives the data that the main control chip needs to send through the 4G or 5G network, realizing the communication interaction between the base station and the external 4G or 5G network.

[0071] As Figure 2 shown, in the embodiment of the present invention, the broadband and narrowband communication sub-modules can be divided into a broadband communication sub-module and a narrowband communication sub-module. The broadband communication sub-module and the narrowband communication sub-module can cooperate with each other for data transmission.

[0072] Among them, optionally, the broadband communication sub-module includes: a signal monitoring sensor and a data monitoring and analyzer; the broadband communication sub-module operates in at least two frequency bands; the signal monitoring sensor performs signal scanning and monitoring on multiple frequency bands in which the broadband communication sub-module operates to obtain signal quality information of each frequency band; the data monitoring and analyzer obtains the service transmission requirements and service transmission priorities transmitted by the main control chip, analyzes the service transmission requirements, and determines the target signal quality required for service transmission; the data monitoring and analyzer receives the signal quality information of each frequency band determined by the signal monitoring sensor, and determines the target frequency band in which the broadband communication sub-module operates according to the target signal quality, service transmission priority, and signal quality information of each frequency band, and performs frequency band switching.

[0073] The broadband communication sub-module is connected to the main control chip through a high-speed USB, has a large-capacity data cache and high-efficiency preprocessing capabilities, can intelligently optimize the data transmission process according to the network status and service priority, and effectively supports the high-speed and stable transmission of high-definition video streams and massive data. The broadband communication sub-module can operate in dual frequency bands of 1.4G and 5.8G. Through the coordinated operation of the dual frequency bands, the optimal frequency band can be automatically selected for data transmission according to the communication environment and service transmission requirements. For example, in an area with strong signal interference, it can be intelligently switched to a frequency band with less interference.

[0074] The broadband communication sub-module can be built with a highly sensitive signal monitoring sensor. Through the signal monitoring sensor, the signals in the 1.4G and 5.8G frequency bands are scanned and monitored in real time to obtain the signal quality information of each frequency band. The signal quality information includes, but is not limited to, key information such as the signal strength within the frequency band, the frequency range and interference intensity of the interference source, etc. When the signal monitoring sensor monitors that the signal interference intensity in a certain frequency band exceeds the preset threshold, for example, in some industrial areas, there may be a large number of electromagnetic interference sources affecting the signal quality of the 1.4G frequency band, and the signal monitoring sensor can quickly transmit the relevant information to the data monitoring and analyzer.

[0075] After receiving the signal quality information, the data monitoring and analyzer can perform comprehensive analysis in combination with the current service transmission requirements. For example, when a service such as high-definition video stream that requires high signal stability and transmission rate is being carried out, the data monitoring and analyzer can immediately initiate the frequency band switching decision process when the signal quality is poor. The data monitoring and analyzer can judge which of the 1.4G and 5.8G frequency bands has less current interference and is more suitable for the transmission of the current service based on historical interference data and real-time monitoring. For example, if the data monitoring and analyzer analyzes that the 5.8G frequency band has relatively less interference at the current moment, and its bandwidth and transmission characteristics can meet the requirements of high-definition video stream, the data monitoring and analyzer can send an instruction to the frequency band switching control circuit of the broadband communication sub-module, instructing it to switch the data transmission to the 5.8G frequency band.

[0076] When performing frequency band switching, the service transmission priority can also be considered. For example, the main control chip can transmit the service transmission priority and the overall network status information to the broadband communication sub-module in real time. When there are multiple services in the network at the same time, the main control chip can determine the service transmission priority according to the urgency and importance of the services, and send the service transmission priority to the broadband communication sub-module. When the data monitoring and analyzer of the broadband communication sub-module performs frequency band switching and resource allocation based on the target signal quality, service transmission priority, and signal quality information of each frequency band, it gives priority to ensuring the requirements of high-priority services.

[0077] After switching to the frequency band with less interference, the broadband communication sub-module can also use a multiple-input multiple-output antenna array (MIMO) to enhance the signal, improving the data transmission rate and reliability. The broadband communication sub-module fuses the antenna signals received by multiple antennas according to the antenna weights of multiple receiving antennas to obtain the target received signal.

[0078] For example, the broadband communication sub-module is equipped with two independent transmit and receive antenna arrays, which are used for the 1.4G and 5.8G frequency bands respectively, that is, dual receive and dual transmit. After switching to the 5.8G frequency band, these two antenna arrays work together in the 5.8G frequency band. The transmitter sends the same data signal through different antennas, and these signals will experience different fading paths during spatial propagation. The receiver uses multiple antennas to receive these signals and combines them through a signal combining algorithm.

[0079] After the receiver uses multiple antennas to receive the signals, by allocating appropriate weights to each received signal, the signal-to-noise ratio of the combined signal is maximized, thereby enhancing the strength of the useful signal, suppressing noise and interference, and improving the signal reliability and transmission quality.

[0080] Assume that the receiver is equipped with N antennas, and the signal received by the i-th antenna is denoted as r i , and its corresponding weight is wi , the combined signal rMRC can be calculated by the formula . Among them, the weight w i can be determined according to the signal-to-noise ratio (SNR) of the signals received by each antenna. The specific calculation method is h i represents the channel gain of the i-th antenna, and σ 2 represents the noise variance. For signals with higher signal-to-noise ratios, the corresponding channel gain h i is larger, and correspondingly, the weight w i allocated during combination is also larger.

[0081] In an actual application scenario, the receiving end can continuously and real-time calculate the signal-to-noise ratio of the signals received by each antenna, and then perform weighted combination on the signals to ensure the stable reception of data such as high-definition video streams, effectively increasing the signal strength and reliability, and reducing the impact of signal fading and interference.

[0082] When the broadband communication sub-module switches frequencies and uses the transmit-and-receive technology, it can feedback the relevant status information to the main control chip, so that the main control chip can monitor and manage the operating status of the entire emergency communication system.

[0083] On the basis of the above implementation, optionally, the broadband and narrowband communication sub-modules work in cooperation with a radio frequency power amplifier (PA). The radio frequency power amplifier obtains the environmental information of the emergency communication site through an environmental sensor and receives the service transmission requirements transmitted by the main control chip; according to the environmental information and service transmission requirements, it adjusts the transmission power when the broadband and narrowband communication sub-modules transmit data.

[0084] The radio frequency power amplifier can provide appropriate power amplification support for the broadband communication sub-module according to its requirements. For example, when switching to a frequency band with less interference and using the transmit-and-receive technology, the radio frequency power amplifier can adjust the transmission power to ensure that the signal can be stably transmitted on this frequency band, and at the same time avoid signal transmission problems caused by excessive or insufficient power.

[0085] Among them, the radio frequency power amplifier can adopt a high-performance gallium arsenide (GaAs)-based radio frequency power amplifier chip, integrated with advanced linearization technology, and has the characteristics of high gain, high efficiency and high linearity. The radio frequency power amplifier can sense the environmental changes and service transmission requirements in real time, dynamically adjust the transmission power, while ensuring effective signal coverage, reducing power consumption and interference. It works closely with the broadband and narrowband communication sub-modules to provide precise power amplification support for signal transmission, and real-time monitors and feedbacks the power status, helping the main control chip to achieve refined power management and fault diagnosis.

[0086] The RF power amplifier first collects the environmental information of the emergency communication site through sensors and receives the service transmission requirements transmitted by the main control chip. The environmental information includes but is not limited to: temperature, humidity, electromagnetic interference intensity, etc. The service transmission requirements include but are not limited to: data transmission rate requirements, coverage requirements, etc. The RF power amplifier sets corresponding transmit power adjustment strategies according to different environmental information and service transmission requirements.

[0087] For example, when the environmental temperature is high, in order to ensure the stability and reliability of the main control chip, the RF power amplifier can appropriately reduce the transmit power; when the service transmission requirement is a high data transmission rate, the RF power amplifier can increase the transmit power to ensure the signal strength and transmission quality. In addition, machine learning algorithms can be used to analyze and learn historical data, continuously optimizing the power adjustment strategy to adapt to different complex scenarios. As time goes by and data accumulates, the decisions of the RF power amplifier will be more accurate and intelligent, further improving the stability and efficiency of signal transmission.

[0088] When the broadband communication sub-module selects the 1.4G frequency band for communication, it transmits the processed 1.4G frequency band signal to the 1.4G PA module. The 1.4G PA module amplifies the power of the signal in this frequency band and then transmits it through the corresponding antenna to meet the requirements for signal strength and coverage when communicating in the 1.4G frequency band.

[0089] When the broadband communication sub-module operates in the 5.8G frequency band, it transmits the 5.8G frequency band signal to the 5.8G PA module. After the 5.8G PA module amplifies the power of the signal, it is transmitted through the antenna to achieve high-speed data transmission in the 5.8G frequency band and ensure the performance of broadband communication in the 5.8G frequency band.

[0090] The broadband communication sub-module adopts a dual-band design of 1.4G and 5.8G and uses the dual-transmit and dual-receive technology. In an environment without a public network, the broadband communication sub-module can automatically select the optimal frequency band for emergency data transmission according to the on-site communication environment, such as signal interference level, transmission distance and other factors. When encountering large-area signal interference, the dual-band design can intelligently switch to the frequency band with less interference to ensure the stability of data transmission. The dual-transmit and dual-receive technology increases the signal transceiver channels, improving the data transmission rate and reliability, ensuring that in emergency situations, such as high-definition videos and a large amount of rescue data between the emergency command center and the rescue site, high-rate and large-data-volume information can be stably transmitted to meet the requirements of the emergency command for real-time and clear understanding of the on-site situation.

[0091] There is two-way communication between the main control chip and the broadband communication sub-module. The main control chip can configure and manage parameters such as frequency band selection (1.4G or 5.8G) and dual-transmission and dual-reception mode of the broadband communication sub-module. The broadband communication sub-module transmits the received high-speed data (such as high-definition video, a large number of file data, etc.) to the main control chip, and at the same time receives the data that the main control chip needs to send through the broadband communication sub-module, ensuring the stable transmission of large-data-volume services in emergency communication.

[0092] As Figure 2 shown, the narrowband communication sub-module of the broadband and narrowband communication sub-modules uses a wide area network for communication; the narrowband communication sub-module monitors the usage conditions and channel quality of each channel in the wide area network, and switches the channels of the accessed Internet of Things devices according to the usage conditions and channel quality of the channels; the narrowband communication sub-module adjusts the transmission rate according to the device communication requirements of the accessed Internet of Things devices, the channel quality of the switched-to channels, and the device power of the Internet of Things devices.

[0093] Among them, the narrowband communication sub-module is based on the advanced low-power wide area network (LPWAN) technology to achieve low-power long-distance communication, and is adapted to the data collection and transmission of a large number of Internet of Things sensors. The narrowband communication sub-module supports the concurrent access of a large number of devices, and has an intelligent dynamic channel allocation and adaptive rate adjustment mechanism to ensure the reliability of the communication link in a complex environment. It interacts with the main control chip through a low-power serial port or SPI interface, and has the functions of deep sleep and fast wake-up, reducing energy consumption and extending the emergency working duration.

[0094] The narrowband communication sub-module can monitor the usage conditions and signal quality of each channel in real time, such as signal strength, interference level, etc. For example, when a new Internet of Things device requests access, the narrowband communication sub-module can select the channel with the best signal quality and the least interference according to the current channel status and allocate it to the device. During the communication process, if the interference of a certain channel suddenly increases, resulting in a decrease in signal quality, the narrowband communication sub-module can automatically switch the device to other available high-quality channels to ensure the stability of the communication.

[0095] The narrowband communication sub-module can dynamically adjust the data transmission rate according to the device communication requirements and channel quality. For example, when the channel conditions are good, such as high signal strength and low interference, the narrowband communication sub-module can increase the data transmission rate to improve the communication efficiency; when the channel conditions deteriorate, such as encountering strong interference or signal attenuation, the narrowband communication sub-module can reduce the transmission rate to ensure that the data can be transmitted accurately and error-free. In addition, the narrowband communication sub-module can also consider factors such as the battery power of the device for transmission rate adjustment. For example, for devices with low battery power, the narrowband communication sub-module can appropriately reduce the transmission rate to reduce energy consumption.

[0096] In the absence of a public network, the advantages of the narrowband communication sub-module in adapting to the data collection and transmission of a large number of Internet of Things sensors can be fully exerted. In the disaster area, there are various Internet of Things sensors for monitoring environmental parameters, human vital signs, etc. The narrowband communication sub-module can support the concurrent access of a large number of such devices and stably transmit the collected data back to the emergency communication base station. Moreover, the narrowband communication sub-module has an intelligent dynamic channel allocation and adaptive rate adjustment mechanism. In a complex emergency environment, when a certain channel is interfered with or the signal quality deteriorates, the narrowband communication sub-module can automatically switch to other available channels to ensure the smoothness of the data transmission link; at the same time, it dynamically adjusts the transmission rate according to the signal strength and transmission distance to ensure long-distance and reliable data transmission on the premise of low power consumption.

[0097] The main control chip is bidirectionally connected to the narrowband communication sub-module through an interface. The main control chip can configure the working parameters of the narrowband communication sub-module, such as channel selection, transmit power, etc., and at the same time issue a data transmission task to the narrowband communication sub-module. The narrowband communication sub-module then transmits the Internet of Things sensor data collected from the low-power wide-area network (LPWAN) to the main control chip to realize the collection and processing of data of a large number of Internet of Things devices.

[0098] As Figure 2 shown, the LPWAN PA module is connected to the narrowband communication sub-module. The narrowband communication sub-module transmits the processed low-power wide-area network signal to the LPWAN PA module. The LPWAN PA module amplifies the signal power and then transmits it through the antenna to enhance the signal coverage range and transmission distance to ensure the stability and reliability of narrowband communication. The LPWAN PA module can adjust the transmit power of the narrowband communication sub-module according to the environmental information and service transmission requirements.

[0099] In the embodiment of the present invention, in the emergency scenario without a public network, the broadband and narrowband communication sub-modules do not work independently, but cooperate under the unified coordination of the main control chip. The main control chip reasonably allocates tasks through real-time status monitoring and data interaction with the broadband and narrowband communication sub-modules. For example, the main control chip can allocate services such as emergency command video conferences with high requirements for real-time performance and bandwidth to the broadband communication sub-module for transmission; and hand over the data transmission tasks of a large number of scattered Internet of Things sensors with relatively low bandwidth requirements to the narrowband communication sub-module. The two cooperate with each other to achieve the efficient transmission of different types of data in emergency communication, jointly build an emergency communication bridge in the absence of a public network, and ensure the smooth progress of emergency rescue work.

[0100] As Figure 2As shown, the emergency communication system further includes a positioning module; the positioning module includes at least two positioning sub-modules, and each positioning sub-module independently obtains the actual observation parameters of the base station position; the positioning module obtains the satellite signal prediction parameters according to the orbital model of the satellite and the motion state of the base station during positioning; the positioning module compares the actual observation parameters of each positioning sub-module with the prediction parameters to obtain the observation residual; according to the prediction error covariance matrix, observation matrix and preset noise covariance matrix corresponding to the positioning sub-module, the Kalman gain of the prediction parameters is determined; the prediction parameters are corrected according to the Kalman gain and the observation residual to obtain the fused position information of the base station, so as to perform path planning in emergency communication according to the fused position information.

[0101] Among them, the positioning sub-module can adopt different satellite positioning methods. For example, the positioning sub-module can use satellite navigation systems such as GPS, Beidou, or Galileo for positioning. The actual observation parameters obtained by multiple positioning sub-modules need to be fused to improve the positioning accuracy and reliability. The positioning module supports differential GPS enhancement technology to further improve the positioning accuracy.

[0102] In the signal preprocessing stage, the positioning module performs unified filtering, amplification, and frequency conversion processing on the actual observation parameters of different positioning sub-modules to make them have the same processing basis. In the feature extraction stage, according to the characteristics of the actual observation parameters of different positioning sub-modules, their respective key features are extracted, such as pseudorange, carrier phase, etc. In the data fusion stage, the extended Kalman filter (EKF) algorithm can be used to fuse the feature data from different positioning sub-modules. There are differences in the orbital distribution, signal characteristics, etc. of the satellites of different positioning sub-modules. By fusing the actual observation parameters of multiple positioning sub-modules, the number of satellites can be increased, the satellite geometric distribution can be improved, and the positioning reliability and accuracy can be enhanced. The fused positioning result can comprehensively utilize the advantages of each positioning sub-module, reduce the impact of the signal of a single positioning sub-module being blocked or interfered on the positioning accuracy, and provide more accurate position information for emergency rescue.

[0103] In emergency communication, the observation data of each satellite navigation system has noise and errors, and the motion relationship between the satellite and the base station is non-linear. The EKF algorithm can effectively handle these problems. First, according to the orbit model of the satellite and the motion state of the base station (such as the base station is on a mobile emergency platform), predict the propagation time of the satellite signal, carrier phase and other prediction parameters. For example, when the base station is moving on a rescue vehicle, the prediction of the satellite signal can be adjusted according to the vehicle's speed, direction and other information. According to the orbit model of the satellite and the motion state of the base station, predict the propagation time of the satellite signal, carrier phase and other prediction parameters. The predicted parameter values are compared with the actual observed parameters such as pseudorange, carrier phase and other data obtained from different positioning sub-modules (such as satellite navigation systems) to obtain the observation residual. The observation residual is equal to the actual observed parameter value minus the predicted parameter value. For example, the pseudorange of a certain satellite observed from the GPS system is R obs , and the predicted pseudorange parameter value of this satellite is R pre , then the pseudorange observation residual ΔR = R obs - R pre . By calculating the observation residuals of multiple satellites, the difference between the predicted parameter value and the actual observed parameter value can be more comprehensively reflected, providing a basis for subsequent positioning correction.

[0104] In the embodiment of the present invention, the statistical characteristics of the noise in the observation data can be described by presetting the noise covariance matrix to improve the positioning accuracy. Since there are differences in signal quality among multiple positioning sub-modules, and the signal quality is also different among satellites in the same positioning sub-module, the satellites in the positioning sub-module can be grouped according to the signal quality, and different preset noise covariance matrices can be set for each group of satellites.

[0105] For example, there are two groups of satellites. The first group has m satellites, and their noise standard deviations are all σ1; the second group has n - m satellites, and the noise standard deviations are all σ2. Then the preset noise covariance matrix R is: Where, I m and I n-m are m-order and n - m-order identity matrices respectively.

[0106] Exemplarily, in an urban environment, GPS satellite signals are more affected by occlusion and interference, while Beidou satellite signals are relatively stable. For example, the noise standard deviation of the GPS satellite group is 1, the noise standard deviation of the Beidou satellite group is 0.8, and there are 3 GPS satellites and 2 Beidou satellites. Then the preset noise covariance matrix is:

[0107] The formula K = PH T (HPH T + R) -1The Kalman gain is determined. Among them, P is the prediction error covariance matrix, which reflects the uncertainty of the predicted parameter values and will be continuously updated with time and new observation data during the positioning process. The prediction error covariance matrix can be obtained through historical data statistics or derived by assuming that the prediction error follows a specific probability distribution. The embodiments of the present invention do not make specific limitations on this. H is the observation matrix, which is used to map the base station state vector (including information such as the base station location) to the observation space and establish the connection between the predicted parameter values and the actual observed parameter values. The observation matrix can be obtained through machine learning or statistical methods based on a large number of predicted parameter values and actual observed parameter values. Through the above Kalman gain determination formula, the uncertainty of the predicted value, the reliability of the observation data, and the relationship between the observation and the state can be comprehensively considered, so as to determine the weight of the observation residual in correcting the predicted parameter values.

[0108] The predicted parameter values are corrected by the Kalman gain, which can be done using the formula Among them, is the estimated value of the corrected base station location, is the predicted base station location in the predicted parameter values, K is the Kalman gain, and ΔZ is the observation residual.

[0109] Exemplarily, the coordinates of the predicted base station location in the two-dimensional plane are (x pre , y pre ). The values of the observation residual in the horizontal and vertical directions are Δx and Δy respectively, and the weights of the Kalman gain matrix K in the horizontal and vertical directions are K x and K y respectively. Then the coordinates of the corrected base station location are: the abscissa x corr = x pre + K x ×Δx and the ordinate y corr = y pre + K x ×Δy. Among them,

[0110] In positioning, every time a new set of satellite observation data of the positioning sub-module is obtained, the above calculation process can be repeated to continuously update the predicted parameter values and the prediction error covariance matrix, making the estimation of the base station location closer and closer to the true value. For example, in a positioning calculation, the predicted abscissa of the base station is 100 meters, the observation residual in the x direction is 5 meters, and the weight of the Kalman gain in the x direction is 0.8. Then the corrected x coordinate is 100 + 0.8×5 = 104 meters. Through continuous iterative optimization, high-precision positioning is achieved, and more accurate satellite position and base station location estimates are obtained. Thus, through the above method, the signal characteristics of multiple positioning sub-modules can be fused, effectively improving the positioning accuracy and reliability. In emergency rescue, more accurate position information can be provided to meet the high requirements for positioning in emergency scenarios.

[0111] For example, in path planning, based on more accurate fused position information, reasonable control of resources in emergency scenarios can be achieved. For example, by accurately determining the position of the vehicle carrying the base station, the vehicle can be commanded to reach the designated location through the optimal path for rescue. Specifically, in an emergency scenario, the positioning module can be bidirectionally connected to the main control chip, such as communicating bidirectionally with the main control chip through a high-speed UART interface. The main control chip sends positioning instructions and related configuration information to the positioning module. After receiving the instructions, the positioning module receives and processes satellite signals, and feeds back the obtained accurate position data (such as longitude, latitude, altitude, etc.) and satellite status information to the main control chip. The main control chip uses the accurate fused position information, combines the actual needs of emergency rescue and geographical information data, and realizes location-based intelligent services, such as accurately planning resource allocation plans and the best driving paths for rescue vehicles. By fusing the positioning data of the positioning sub-module through the positioning module, it can provide basic data support for applications such as the position positioning of the base station and path planning in emergency rescue.

[0112] As Figure 2 shown, optionally, the emergency communication system further includes: an emergency power supply; the emergency power supply includes a lithium-ion battery pack, a super capacitor, and an external solar panel; when the input power supply of the emergency power supply is normal, the emergency power supply supplies power to the main control chip through the input power supply, and charges the lithium-ion battery pack and the super capacitor through the input power supply; when the input power supply of the emergency power supply is interrupted, the emergency power supply supplies power to the main control chip through the lithium-ion battery pack, the super capacitor, or the external solar panel.

[0113] The input power supply of the emergency power supply can be the mains power. When the mains power is normal, the emergency power supply, on the one hand, charges its own energy storage devices (such as lithium-ion battery packs, super capacitors, etc.), and on the other hand, supplies power to the main control chip through the output line to ensure the normal operation of the main control chip. The main control chip can reasonably allocate electrical energy to other modules (such as mobile communication sub-modules, broadband communication sub-modules, narrowband communication sub-modules, etc.) according to the working requirements of each module. When the mains power is interrupted, the emergency power supply automatically switches to the backup power supply mode, and the energy storage device supplies power to the main control chip and other modules, ensuring that the base station can still continue to work for a period of time under power-off conditions to meet the needs of emergency communication.

[0114] Among them, the lithium-ion battery pack can ensure the long-term stable power supply of the emergency power supply after the input power supply (such as the mains power) is interrupted. The super capacitor can provide instant high-power support. The solar panel can charge the emergency power supply under sunlight. The emergency power supply can monitor the energy state in real time (such as the battery power of the emergency power supply, the solar charging power, etc.) and the load of the base station, optimize the energy distribution strategy, charge and supply power when the external input power supply is normal, and seamlessly switch the power supply mode and adjust the power consumption when the input power supply is interrupted.

[0115] Specifically, the emergency power supply can adjust the power consumption of each module according to the remaining power and the business requirements of the base station. For example, it can prioritize ensuring critical communication functions, thereby effectively extending the operating time of the base station. Exemplarily, when the remaining power of the emergency power supply is less than the preset power threshold, and the main control chip uses the broadband communication sub-module for high-priority service communication and the narrowband communication sub-module for low-priority service communication during communication, the broadband communication sub-module can be powered on while the narrowband communication sub-module is powered off when the remaining power of the emergency power supply is less than the preset power threshold; when the remaining power of the emergency power supply is greater than the preset power threshold, the power supply to the narrowband communication sub-module is restored.

[0116] By adopting a hybrid emergency power supply architecture including a lithium-ion battery pack, a supercapacitor, and an external solar panel in the emergency power supply and intelligent power management to extend the operating time of the base station, it can adapt to different energy conditions and ensure the long-term communication requirements for emergency rescue.

[0117] As Figure 2 shown, in the embodiment of the present invention, the emergency communication system further includes: a Bluetooth module; the main control chip is bidirectionally connected to the Bluetooth module, and the main control chip performs Bluetooth device self-organizing networking through the Bluetooth module and conducts data transmission through the Bluetooth device self-organizing networking.

[0118] Convenient local configuration can be achieved through the Bluetooth module. Users can connect to the base station via Bluetooth on a mobile device to perform operations such as parameter setting, device diagnosis, and data reading. Through the self-organizing networking between Bluetooth devices by the Bluetooth module, communication within the local self-organizing network can be carried out when the emergency communication system cannot conduct Internet communication through the Ethernet communication sub-module, the mobile communication sub-module, and the broadband and narrowband communication sub-modules, ensuring the smooth progress of emergency work.

[0119] Among them, the Bluetooth module can adopt Bluetooth 5.0 technology, integrate a low-power consumption optimization circuit and a long-distance transmission enhancement technology, and has the characteristics of low power consumption, long-distance transmission, and high reliability. Through the Bluetooth Mesh networking of the Bluetooth module, a self-organizing network is constructed with surrounding Bluetooth devices to expand the application scenarios of short-distance data collection and transmission at the emergency site.

[0120] The main control chip is bidirectionally connected to the Bluetooth module. The main control chip can control the working state of the Bluetooth module, such as turning on or off the Bluetooth function, setting Bluetooth connection parameters, etc. The Bluetooth module can achieve data transmission with nearby Bluetooth devices (such as mobile phones, tablets, etc.), facilitating users to perform short-distance configuration and management of the base station or realizing some specific Bluetooth communication functions. The Bluetooth module realizes local wireless configuration, and the main control chip supports remote management and upgrade, facilitating device debugging and maintenance and improving operability.

[0121] As Figure 2As shown in the figure, in the embodiment of the present invention, the emergency communication system further includes: an anti-disassembly module; the anti-disassembly module uses a three-axis acceleration sensor to monitor the physical state of the devices in the emergency communication system and the environmental change information, and determines the disassembly state of the emergency communication system according to the physical state of the devices and the environmental change information; when the anti-disassembly module determines that the emergency communication system is in a disassembly state, it sends an alarm message to the main control chip through an encrypted communication link; the main control chip performs a system emergency protection strategy according to the alarm message.

[0122] Among them, the anti-disassembly module using a three-axis acceleration sensor can monitor the physical state of the base station devices in the emergency communication system and the changes in the surrounding environment in real time. By using the three-axis accelerometer, the acceleration of an object can be measured on the base station device in three orthogonal directions (such as the X-axis, Y-axis, and Z-axis), so as to accurately judge the disassembly state of the emergency communication system, such as whether the emergency communication system has been illegally disassembled, moved, or damaged.

[0123] The anti-disassembly module can send an alarm message to the main control chip through an encrypted communication link. The main control chip executes a preset system emergency protection strategy, such as sending an alarm to the remote management platform to notify relevant personnel, starting the local sound and light alarm device, encrypting and storing critical data and backing it up remotely, recording the alarm status and time, etc., to ensure the safety of the facilities of the emergency communication system.

[0124] The anti-disassembly module using a three-axis acceleration sensor and encrypted communication effectively prevents illegal damage and ensures the safe and stable operation of communication facilities.

[0125] In the technical solution of this embodiment, the main control chip is respectively connected to the Ethernet communication sub-module, the mobile communication sub-module, and the broadband and narrowband communication sub-module; on this basis, the main control chip is respectively connected to the positioning module, the emergency power supply, the Bluetooth module, and the anti-disassembly module to form an emergency communication system; among them, the main control chip can perform dynamic resource allocation for each module in the emergency communication system to ensure the reasonable utilization of resources and the service transmission performance; the Ethernet communication sub-module uses two gigabit Ethernet interfaces to ensure high-speed and stable data transmission; each generation of mobile communication network in the mobile communication sub-module can perform stable network switching according to the network quality and service transmission requirements to ensure stable data transmission; the broadband communication sub-module uses dual-band, dual-receive and dual-transmit, and radio frequency PA power adjustment base number to give priority to ensuring critical service communication and improving communication quality; the narrowband communication sub-module uses wide area network for channel switching, transmission rate adjustment, and radio frequency PA power adjustment technology to ensure communication quality; the positioning module improves the positioning accuracy by fusing the actual observation parameters of multiple positioning sub-modules, and realizes the accurate scheduling of emergency resources in the emergency rescue scenario; the emergency power supply can ensure the emergency communication demand through the energy storage device and the backup power supply mode; self-organizing network can be realized through Bluetooth devices to ensure short-distance Bluetooth communication; the security of the emergency communication system can be ensured through the anti-disassembly module; through the emergency communication system, various network resources can be integrated, and dynamic network resource integration switching and scheduling can be performed according to the environmental information, network quality, and service transmission requirements of the emergency communication scenario to ensure the reasonable utilization of resources and the reliable transmission of emergency services.

[0126] The above specific implementation manners do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An emergency communication system, characterized in that: The system comprises: a main control chip and a communication module; the main control chip is connected to the communication module for communication interaction; wherein the communication module comprises a plurality of communication submodules, and each communication submodule is arranged in descending order according to the communication priority: an Ethernet communication submodule, a mobile communication submodule, and a broadband and narrowband communication submodule; The main control chip selects the target communication submodule from each communication submodule according to the connection status, communication priority, communication environment of the emergency communication site, and business transmission requirements in the emergency communication, and allocates business resources to the network resources of the target communication submodule.

2. The system according to claim 1, characterized in that The broadband communication submodule of the broadband and narrowband communication submodule includes: a signal monitoring sensor, and a data monitoring and analyzer; the broadband communication submodule operates in at least two frequency bands; The signal monitoring sensor performs signal scanning and monitoring on multiple frequency bands in which the broadband communication submodule operates, and obtains signal quality information of each frequency band; The data monitoring and analyzing device obtains the service transmission requirements and service transmission priorities of the main control chip, analyzes the service transmission requirements, and determines the target signal quality required for service transmission; The data monitor and analyzer receives the signal quality information of each frequency band determined by the signal monitoring sensor, and determines the target frequency band of the broadband communication submodule according to the target signal quality, service transmission priority, and the signal quality information of each frequency band, and performs frequency band switching.

3. The system according to claim 2, characterized in that The broadband communication submodule uses a multi-input multi-output antenna array to enhance the signal in each frequency band; The broadband communication submodule fuses antenna signals received by multiple antennas according to antenna weights of the multiple receiving antennas to obtain a target receiving signal.

4. The system according to claim 1, characterized in that The narrowband communication submodule of the broadband and narrowband communication submodules uses a wide area network for communication; The narrowband communication submodule monitors the usage and quality of each channel in the wide area network, and switches the channels of the connected IoT devices according to the usage and quality of the channels; The narrowband communication submodule adjusts the transmission rate according to the device communication requirements of the connected IoT device, the channel quality of the switched channel, and the device power of the IoT device.

5. The system according to claim 1, characterized in that The broadband and narrowband communication submodules work in conjunction with the radio frequency power amplifier; The RF power amplifier obtains environmental information of the emergency communication site through environmental sensors and receives business transmission requirements transmitted by the main control chip; according to the environmental information and the business transmission requirements, the transmission power of the broadband and narrowband communication sub-modules when transmitting data is adjusted.

6. The system according to claim 1, characterized in that The mobile communication submodule includes: at least two generations of mobile communication networks, and a network perception and decision maker; The network sensing and decision-making device monitors the network signal quality of each generation of mobile communication networks and obtains the service transmission requirements transmitted by the main control chip; performs network switching in each generation of mobile communication networks according to the network signal quality, the service transmission requirements and the preconditions of network switching; When executing network switching, in the process of establishing a connection with the target mobile communication network, the service data currently being transmitted is temporarily cached in the memory of the main control chip; and when the connection with the target mobile communication network is successfully established, the data transmission path is switched to the target mobile communication network for breakpoint-resume data transmission; After the network switching, the network perception and decision maker monitors the network signal quality of the target generation mobile communication network, and when the network signal quality is lower than a preset signal quality threshold and the duration reaches a preset time threshold, it determines that the target generation mobile communication network has met the prerequisite for network switching.

7. The system according to claim 1, characterized in that The system further includes a positioning module; the positioning module includes at least two positioning submodules, each positioning submodule independently positioning to obtain actual observation parameters of the base station position; The positioning module obtains the satellite signal prediction parameters according to the satellite orbit model and the motion state of the base station during positioning; The positioning module compares the actual observation parameters of each positioning submodule with the predicted parameters to obtain the observation residual; Determine the Kalman gain of the prediction parameter according to the prediction error covariance matrix, the observation matrix and the preset noise covariance matrix corresponding to the positioning submodule; The prediction parameters are corrected according to the Kalman gain and the observation residual to obtain the fused position information of the base station, so as to perform path planning in emergency communication according to the fused position information.

8. The system according to claim 1, characterized in that The system further includes: an emergency power supply; the emergency power supply includes a lithium-ion battery pack, a supercapacitor and an external solar panel; When the input power of the emergency power supply is normal, the emergency power supply supplies power to the main control chip through the input power supply, and charges the lithium-ion battery pack and the supercapacitor through the input power supply; When the input power of the emergency power supply is interrupted, the emergency power supply supplies power to the main control chip through a lithium-ion battery pack, a supercapacitor or an external solar panel.

9. The system according to claim 1, characterized in that The system further includes: a Bluetooth module; The main control chip is bidirectionally connected to the Bluetooth module. The main control chip conducts a self-organizing network of Bluetooth devices through the Bluetooth module and transmits data through the self-organizing network of Bluetooth devices.

10. The system according to claim 1, characterized in that The system further includes: an anti-tampering module; The anti-disassembly module uses a three-axis acceleration sensor to monitor the physical state of the equipment and environmental change information in the emergency communication system, and determines the disassembly state of the emergency communication system according to the physical state of the equipment and the environmental change information; When the anti-disassembly module determines that the emergency communication system is in a disassembled state, it sends an alarm message to the main control chip through an encrypted communication link; The main control chip implements system emergency protection strategy based on the alarm information.

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