CN114422942B - A mobile emergency communication system based on wireless ad hoc network technology - Google Patents

Abstract

A mobile emergency communication system based on wireless ad hoc network technology belongs to the field of mobile emergency communication technology of wireless ad hoc network technology. The present invention solves the problem that the existing emergency communication equipment cannot provide accurate on-site information and rescue information to on-site rescue personnel and control command centers in a timely manner, and the implementation cost is high and the function is single. The mobile emergency communication system of the present invention includes a command and control center, mobile emergency communication equipment and communication terminal equipment. The command and control center is used for decision-making and command of sudden accidents, and disseminates deployment information to on-site rescue personnel or organizes personnel for rescue; the command and control center establishes a communication link with each mobile emergency communication device through a self-organizing network or public network access, and the communication terminal equipment actively or passively establishes a communication link with the mobile emergency communication device. The method of the present invention can be applied to emergency communications at the scene of an accident.

Description

A mobile emergency communication system based on wireless ad hoc network technology

Technical Field

The present invention belongs to the technical field of mobile emergency communication based on wireless ad hoc network technology, and in particular relates to a mobile emergency communication system based on wireless ad hoc network technology.

Background technique

In the rescue process of sudden natural disasters and man-made emergencies, communication plays a vital role. Therefore, how to quickly establish an efficient communication system to ensure stable communication between emergency commanders, rescuers and disaster victims is an important issue in emergency handling.

The current mainstream emergency communication equipment mainly adopts mobile emergency communication, satellite communication or single self-organizing network technology, but these technologies have obvious shortcomings and are difficult to meet the needs of complex accident rescue sites. For example: the emergency communication system based on the existing mobile communication network has low flexibility, and the communication capacity at the scene of sudden disasters is often unpredictable, which is extremely easy to cause communication congestion, so it is difficult to ensure effective information transmission. At the same time, in areas where communication has been destroyed or in some remote areas, the existing mobile communication network is difficult to provide effective communication services. Although the emergency communication system based on satellite communication has a long transmission distance and high reliability, its construction and maintenance costs are high, it has a certain hardware foundation, and requires the cooperation of a large number of professional and technical personnel. It is difficult for a single self-organizing network communication device to establish a communication link with an ordinary device terminal during the rescue process, and it can only rely on a single private network for communication. In the face of complex and changeable accident scenes, it is not conducive to rescue personnel to grasp the full range of information in the accident area, which seriously affects the deployment and arrangement of rescue personnel.

To sum up, the existing emergency communication equipment is unable to provide on-site rescue personnel and control command centers with accurate on-site information and rescue information in a timely manner, and the implementation cost is high and the function is single. Therefore, in order to solve the above problems, it is very necessary to propose a mobile emergency communication system that can provide on-site rescue personnel and control command centers with accurate on-site information and rescue information in a timely manner and has a low implementation cost.

Summary of the invention

The purpose of the present invention is to solve the problems that the existing emergency communication equipment cannot provide on-site rescue personnel and the control command center with accurate on-site information and rescue information in a timely manner, and has high implementation costs and single functions, and to propose a mobile emergency communication system based on wireless ad hoc network technology.

The technical solution adopted by the present invention to solve the above technical problems is: a mobile emergency communication system based on wireless ad hoc network technology, the system includes a command and control center, a mobile emergency communication device and a communication terminal device, wherein:

The mobile emergency communication device is set in the accident area, and the mobile emergency communication device serves as a relay node for emergency communication, and is used to obtain environmental information and accident information in real time in the sudden accident;

The command and control center is set up in a safe area outside the accident area and is used for decision-making and command of sudden accidents; the command and control center establishes a communication link with each mobile emergency communication device through an ad hoc network or public network access;

The communication terminal device actively or passively establishes a communication link with the mobile emergency communication device;

The mobile emergency communication device includes a central processor module, an information collection module, an information display module, a network access module, a dedicated MESH network transceiver module, a transceiver antenna module and a satellite positioning module;

The central processor module integrates a storage unit, a control unit, a network processor unit and a data processor unit;

The storage unit stores computer instructions, and the control unit controls the network processor unit and the data processor unit to execute the computer instructions;

The information collection module includes a sensor unit, which is used to monitor the environmental information around the mobile emergency communication device and send the monitored abnormal environmental information and the location information of the mobile emergency communication device to the command and control center through the self-organizing network communication link;

The information display module is used to display the monitored abnormal information;

The dedicated MESH network transceiver module is used for mobile emergency communication equipment to establish a self-organizing network communication link with the communication terminal equipment, and to realize the forwarding of data information;

The network access module includes a WIFI unit, which provides a network interface for the communication terminal device, and is used for the communication terminal device to return text, image, and voice auxiliary information; when a communication terminal returns information, the storage unit caches the returned information, and the WIFI unit gives the communication terminal a response message that the returned information has been received;

The satellite positioning module is called to obtain the location information of the communication terminal. The network processor unit sends the location information and feedback information of the communication terminal to the command and control center through the self-organizing network communication link. The command and control center transmits the deployment information to the on-site rescue personnel or organizes the personnel for rescue;

The transceiver antenna module is used to monitor the channel status of the communication link.

Furthermore, the sensor unit is used to monitor the environmental information around the mobile emergency communication device, and send the monitored abnormal environmental information and the location information of the mobile emergency communication device to the command and control center through the ad hoc network communication link; the specific process is:

When the sensor unit detects an abnormality, the information display module displays the environmental abnormality, and the data processor unit pre-processes the detected abnormal information to determine the abnormality type. The network processor unit uses the datatype bit in the frame header FrameHeader of the MAC frame to mark the abnormal data type;

The satellite positioning module is called to determine the location information of the mobile emergency communication device, and the storage unit is used to cache the sensor monitoring data and location information. The network processor unit packages the location information and sensor data information and sends them to the command and control center through the self-organizing network communication link, and the command and control center makes the deployment.

Furthermore, the mobile emergency communication equipment is carried to the accident area by a drone or an unmanned vehicle, carried by rescue personnel on their backs, or placed in the accident area by a set temporary fixed installation point.

Furthermore, the information collection module also includes a camera unit, which is used to monitor the accident information near the mobile emergency communication device in real time. When an abnormality is found, the video data information is transmitted to the data processor unit for processing and judgment, and the storage unit caches the video data;

The satellite positioning module is called to determine the location information of the mobile emergency communication device, and the location information and video data information are sent to the command and control center through the self-organizing network communication link. The command and control center makes a decision and broadcasts the abnormal information through the self-organizing network communication link.

Furthermore, the communication terminal equipment includes handheld terminals of rescue personnel, mobile phones of disaster-stricken users, personal computers and walkie-talkies, the satellite positioning module is GPS or Beidou navigation, and the information display module includes a warning light, a single-soldier handheld display and a speaker.

Furthermore, the network access module also includes a mobile communication unit, which is a second generation mobile communication unit, a third generation mobile communication unit, a fourth generation mobile communication unit, a fifth generation mobile communication unit or a long term evolution unit, and the mobile communication unit is used to broadcast disaster information and rescue information.

Furthermore, the sensor unit includes a temperature sensor, a gas smoke sensor and a pressure sensor.

Furthermore, the process of establishing the self-organizing network communication link is as follows:

Step 1: Each mobile emergency communication device realizes self-organizing network through a dedicated MESH network transceiver module to establish a self-organizing network communication link;

Step 2: The command and control center broadcasts network test information to detect the networking status of each mobile emergency communication device;

The specific process of step 2 is as follows:

If all mobile emergency communication devices respond to the test message, the self-organizing network covers the entire accident area, and step three is continued; otherwise, if there are mobile emergency communication devices that do not respond to the test message, the self-organizing network does not cover the entire accident area, and step five is executed;

Step 3: Each mobile emergency communication device starts a functional test to determine whether the working status of each module of the mobile emergency communication device is normal. If the working status of each module is normal, proceed to step 4; otherwise, report the abnormal information to the command and control center through the self-organizing network communication link, and the command and control center makes a decision and issues instructions;

Step 4: Rescuers carry mobile emergency communication equipment into the accident area to carry out rescue operations;

Step 5. The command and control center continues to deploy mobile emergency communication equipment according to the networking situation. After deploying new mobile emergency communication equipment, it detects the newly added mobile emergency communication equipment through the dedicated MESH network transceiver module and updates the route until the self-organizing network covers the entire accident area and executes step 3.

Furthermore, the determination of the state of the self-organizing network communication link and the processing flow of the abnormal state are as follows:

Step 1: determine whether the routing table in the mobile emergency communication device is empty. If it is not empty, it means that the self-organizing network communication link of the mobile emergency communication device is normal; if it is empty, it means that the self-organizing network communication link of the mobile emergency communication device is abnormal, and execute step 2;

Step 2: The network processor unit of the mobile emergency communication device sends a route search instruction, and the antenna sends a route search information. If a response is received from other mobile emergency communication devices, that is, the route search is successful, execute step 6, otherwise execute step 3;

Step 3: The information display module displays that the ad hoc network is abnormal or makes a corresponding prompt response;

Step 4: The satellite positioning module obtains the location information of the current ad hoc network failure and stores the location information;

Step 5: Change the location of other mobile emergency communication devices and then execute step 2;

Step 6: The information display module stops displaying the network abnormality, and the satellite positioning module obtains the current location information of each mobile emergency communication device and stores the obtained location information;

Step 7: The network processor unit updates the routing table and establishes a self-organizing network communication link;

Step 8: The mobile emergency communication device packages and transmits the stored location information when the ad hoc network fails and the current location information back to the command and control center through the ad hoc network communication link;

Step 9: The command and control center makes decisions based on the information sent by each mobile emergency communication device.

Furthermore, the system also includes a battery management module, which is used to provide a stable power supply for the mobile emergency communication device.

The beneficial effects of the present invention are:

The system of the present invention realizes network coverage of the accident site through a dedicated MESH network self-organizing network link, and at the same time, the WIFI link realizes providing a network access interface for the on-site terminal, and the mobile communication network actively broadcasts disaster information and rescue guides to the on-site terminal, solving the problem of single function of existing emergency communication equipment. The mobile emergency communication system can provide timely, accurate and comprehensive communication guarantee for the accident site. The mobile emergency communication equipment can select communication equipment with different power consumption for different carriers through modular design. At the same time, the device is provided with a storage unit that can cache the data received by the node or the data collected by the information acquisition module. When the data is sent, it can effectively, reliably and efficiently guarantee the information transmission. When the communication is interrupted, the loss of the received data can be prevented. At the same time, the storage unit can cache the data and instructions that appear frequently, and when it needs to be sent, it can be directly read from the cache unit, thereby improving the communication efficiency. The data processor assembled in the device can quickly and efficiently realize the preprocessing and classification of the data, which is convenient for timely providing accurate on-site information and distress information to the command and control center or rescue personnel, and effectively reduces the cost of system implementation.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

Figure 1 is a schematic diagram of a mobile emergency communication device module;

FIG2 is a schematic diagram of the structure of a conventional mobile emergency communication device;

FIG3 is a schematic diagram of the structure of a low-power version of a mobile emergency communication device;

FIG4 is an abstract model diagram of a mobile emergency communication system;

FIG5 is a schematic diagram of a communication link in a mobile emergency communication system;

FIG6 is a schematic diagram of network coverage in a mobile emergency communication system;

FIG7 is a flowchart of establishing and implementing a mobile emergency communication system;

FIG8 is a flowchart of a mobile emergency communication device node;

FIG9 is a flow chart of internal signal processing of a mobile emergency communication device node;

FIG10 is a flowchart showing the processing of networking anomalies by the self-organizing module of the mobile emergency communication device node.

Detailed ways

It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

Specific implementation method 1: This implementation method is described in conjunction with Figures 1, 3 and 4. This implementation method describes a mobile emergency communication system based on wireless ad hoc network technology, the system includes a command and control center, a mobile emergency communication device and a communication terminal device, wherein:

The mobile emergency communication device is set in the accident area, and the mobile emergency communication device serves as a relay node for emergency communication, and is used to obtain environmental information and accident information in the sudden accident in real time;

The command and control center is set up in a safe area outside the accident area and is used for decision-making and command of sudden accidents; the command and control center establishes a communication link with each mobile emergency communication device through an ad hoc network or public network access;

The communication terminal device actively or passively establishes a communication link with the mobile emergency communication device;

The mobile emergency communication device includes a central processor module, an information collection module, an information display module, a network access module, a dedicated MESH network transceiver module, a transceiver antenna module and a satellite positioning module;

The central processor module integrates a storage unit, a control unit, a network processor unit and a data processor unit;

The storage unit stores computer instructions, and the control unit controls the network processor unit and the data processor unit to execute the computer instructions to complete the functions of response networking, forwarding, and movement;

The information collection module includes a sensor unit, which is used to monitor the environmental information around the mobile emergency communication device and send the monitored abnormal environmental information and the location information of the mobile emergency communication device to the command and control center through the self-organizing network communication link;

The information display module is used to display the monitored abnormal information;

The dedicated MESH network transceiver module is used for mobile emergency communication equipment to establish a self-organizing network communication link with the communication terminal equipment, and to realize the forwarding of data information;

The network access module includes a WIFI unit, which provides a network interface for the communication terminal device, and is used for the communication terminal device to return text, image, and voice auxiliary information; when a communication terminal returns information, the storage unit caches the returned information, and the WIFI unit gives the communication terminal a response message that the returned information has been received;

The satellite positioning module is called to obtain the location information of the communication terminal. The network processor unit sends the location information and feedback information of the communication terminal to the command and control center through the self-organizing network communication link. The command and control center transmits the deployment information to the on-site rescue personnel or organizes the personnel for rescue;

From the perspective of power consumption, network access modules are mainly installed on temporary fixed base station nodes or unmanned vehicles and other devices that can carry large-capacity batteries;

The transceiver antenna module is used to monitor the channel status of the communication link and send communication signals.

The mobile emergency communication device of the present invention can be mounted on different carriers through modular design. As shown in FIG2 , a conventional mobile emergency communication device can be mounted on a temporary fixed base station node or an unmanned vehicle or other device that can carry a large-capacity battery, and includes a central processor module, a dedicated MESH transceiver unit, a mobile communication unit, a WIFI RF front-end unit, a Beidou/GPS unit, a camera unit, a sensor unit, a warning light unit, and a power management unit.

The low-power version of the mobile emergency communication equipment can be carried by drones with limited battery energy or individual rescue personnel. It can choose to remove energy-intensive components such as the mobile communication unit and camera module based on the conventional version.

Specific implementation method 2: This implementation method is different from the specific implementation method 1 in that the sensor unit is used to monitor the environmental information around the mobile emergency communication device, and send the monitored abnormal environmental information and the location information of the mobile emergency communication device to the command and control center through the self-organizing network communication link; the specific process is:

When the sensor unit detects an abnormality, the information display module displays the environmental abnormality, and the data processor unit pre-processes the detected abnormal information to determine the abnormality type. The network processor unit uses the datatype bit in the frame header FrameHeader of the MAC frame to mark the abnormal data type;

The network processor unit integrates high-performance MAC/baseband/RF submodules and is developed into a wireless router, wireless AP (Wireless Access Point), and wireless bridge;

The satellite positioning module is called to determine the location information of the mobile emergency communication device, and the storage unit is used to cache the sensor monitoring data and location information. The network processor unit packages the location information and sensor data information and sends them to the command and control center through the self-organizing network communication link, and the command and control center makes the deployment.

The other steps and parameters are the same as those in the first embodiment.

Specific implementation method three: This implementation method is different from specific implementation methods one or two in that the mobile emergency communication equipment is carried to the accident area by drones or unmanned vehicles, carried by rescue personnel to the accident area, or placed in the accident area through a temporary fixed installation point.

The other steps and parameters are the same as those in the first or second embodiment.

Specific implementation method 4: This implementation method is different from any one of specific implementation methods 1 to 3 in that the information acquisition module further includes a camera unit, which is used to monitor the accident information near the mobile emergency communication device in real time. When an abnormality is found (i.e., a rescuer is detected asking for help, a new dangerous situation or other abnormal situation is detected), the video data information is transmitted to the data processor unit for processing and judgment, and the storage unit caches the video data;

The satellite positioning module is called to determine the location information of the mobile emergency communication device, and the location information and video data information are sent to the command and control center through the self-organizing network communication link. The command and control center makes a decision and broadcasts the abnormal information through the self-organizing network communication link.

The other steps and parameters are the same as those in Specific Embodiments 1 to 3.

Specific implementation five: This implementation differs from any one of specific implementations one to four in that the communication terminal equipment includes handheld terminals for rescue personnel, mobile phones, personal computers and walkie-talkies of disaster-stricken users, the satellite positioning module is GPS or Beidou navigation, and the information display module includes a warning light, a single-soldier handheld display and a speaker. When the network is abnormal or the environment at the accident site changes, prompts can be given through the information display device.

The other steps and parameters are the same as those in Specific Embodiments 1 to 4.

Specific implementation example six: This implementation example differs from any one of specific implementation examples one to five in that the network access module also includes a mobile communication unit, which is a second generation mobile communication unit, a third generation mobile communication unit, a fourth generation mobile communication unit, a fifth generation mobile communication unit or a long term evolution (LTE) unit, and the mobile communication unit is used to broadcast disaster information and rescue information.

The other steps and parameters are the same as those in Specific Implementation Methods 1 to 5.

Specific implementation example 7: This implementation example is different from any one of specific implementation examples 1 to 6 in that the sensor unit includes a temperature sensor, a gas smoke sensor and a pressure sensor.

The other steps and parameters are the same as those in Specific Embodiments 1 to 6.

Specific implementation eight: This implementation is described in conjunction with Figures 5 and 6. This implementation is different from one of the specific implementations 1 to 7 in that the process of establishing the self-organizing network communication link is:

Step 1: Each mobile emergency communication device realizes self-organizing network through a dedicated MESH network transceiver module to establish a self-organizing network communication link;

Step 2: The command and control center broadcasts network test information to detect the networking status of each mobile emergency communication device;

The specific process of step 2 is as follows:

If all mobile emergency communication devices respond to the test message, the self-organizing network covers the entire accident area, and step three is continued; otherwise, if there are mobile emergency communication devices that do not respond to the test message, the self-organizing network does not cover the entire accident area, and step five is executed;

Step 3: Each mobile emergency communication device starts a functional test to determine whether the working status of each module of the mobile emergency communication device is normal. If the working status of each module is normal, proceed to step 4; otherwise, report the abnormal information to the command and control center through the self-organizing network communication link, and the command and control center makes a decision and issues instructions;

Step 4: Rescuers carry mobile emergency communication equipment into the accident area to carry out rescue operations;

Step 5. The command and control center continues to deploy mobile emergency communication equipment according to the networking situation. After deploying new mobile emergency communication equipment, it detects the newly added mobile emergency communication equipment through the dedicated MESH network transceiver module and updates the route until the self-organizing network covers the entire accident area and executes step 3.

The other steps and parameters are the same as those in Specific Embodiments 1 to 7.

Specific implementation method 9: This implementation method is different from any one of specific implementation methods 1 to 8 in that the judgment of the state of the self-organizing network communication link and the processing flow of the abnormal state are as follows:

Step 1: determine whether the routing table in the mobile emergency communication device is empty. If it is not empty, it means that the mobile emergency communication device has been connected to the ad hoc network and the ad hoc network communication link is normal. If it is empty, it means that the mobile emergency communication device is isolated and the ad hoc network communication link is abnormal, and execute step 2;

Step 2: The network processor unit of the mobile emergency communication device sends a route search instruction, and the antenna sends a route search information. If a response is received from other mobile emergency communication devices, that is, the route search is successful, execute step 6, otherwise execute step 3;

Step 3: The information display module displays that the ad hoc network is abnormal or makes a corresponding prompt response;

Step 4: The satellite positioning module obtains the location information of the current ad hoc network failure and stores the location information;

Step 5: Change the location of other mobile emergency communication devices and then execute step 2;

In this step, the position of the mobile emergency communication device whose position can be changed is changed, and no processing is required for the mobile emergency communication device whose position cannot be changed;

Step 6: The information display module stops displaying the network abnormality, and the satellite positioning module obtains the current location information of each mobile emergency communication device and stores the obtained location information;

Step 7: The network processor unit updates the routing table and establishes a self-organizing network communication link;

Step 8: The mobile emergency communication device packages and transmits the stored location information when the ad hoc network fails and the current location information back to the command and control center through the ad hoc network communication link;

Step 9: The command and control center makes decisions based on the information sent by each mobile emergency communication device.

The other steps and parameters are the same as those in Specific Embodiments 1 to 8.

Specific implementation ten: This implementation differs from specific implementations one to nine in that the system also includes a battery management module, which is used to provide a stable power supply for the mobile emergency communication equipment to ensure the normal operation of each module. It is equipped with a power monitoring system to provide timely prompts when the power is low.

The other steps and parameters are the same as those in Specific Embodiments 1 to 9.

The present invention provides a mobile emergency communication system and a multifunctional portable mobile emergency communication device. The mobile emergency communication system is composed of a command and control center, mobile emergency communication equipment, and terminal equipment. It can achieve temporary communication coverage of the accident site, actively provide network access for terminals at the accident site, monitor the environmental information of the accident site in real time, and broadcast disaster information and rescue information to them.

The mobile emergency communication system is described in detail below with reference to the accompanying drawings and specific embodiments.

Embodiment 1, as shown in FIG7 , the specific implementation method of establishing the mobile emergency communication system is as follows:

Step 1: First, set up a command and control center in a safe area outside the accident area. The command and control center can be mounted on a rescue vehicle or temporarily built in a camp. Secondly, set up emergency communication ground nodes in suitable areas, such as temporary base stations. As the core intermediate nodes in the self-organizing network, the emergency communication equipment can be equipped with large-capacity batteries and more functional modules. It can not only realize self-organizing networking through dedicated MESH networking units, but also realize public network access through mobile communication units, providing communication guarantee for the subsequent layout of other nodes. Finally, release the mobile communication nodes carried by drones, unmanned vehicles, etc., to provide basic network coverage of the accident site to a certain extent, and monitor the environmental information of the accident site at the same time, to provide guarantee for subsequent personnel to enter the site. Considering power consumption, drones often choose to carry low-power versions of mobile emergency communication equipment, which are mainly responsible for data transfer and environmental monitoring, and do not provide public network access function.

Step 2: Each emergency communication node realizes self-organizing networking through a dedicated MESH network transceiver unit and establishes a self-organizing network communication link.

Step 3: The command and control center broadcasts network test information to detect the networking status of each node.

Step 4: Determine whether the network covers the accident area, that is, determine whether all nodes have responded to the test information. If so, it means that the network is successfully established and execute step 5; otherwise, execute step 7.

Step 5: Each emergency communication device starts the function module test and determines whether each function module is working normally. If not, the node reports the abnormal information to the command and control center through the self-organizing network communication link. Finally, the command and control center makes a decision and issues instructions.

Step 6: Rescuers carry mobile emergency communication equipment into the accident area to carry out rescue operations.

Step 7: The command and control center continues to deploy mobile emergency communication nodes according to the networking situation. After the new nodes are deployed, each node automatically detects the new nodes and updates the routes through the dedicated MESH network transceiver unit and network processor. If the networking is successful and the accident area is covered by the network, it means that the mobile emergency communication system is successfully established, otherwise continue to step 7.

Embodiment 2, as shown in FIG8 , the specific implementation of each functional module of a node in a mobile emergency communication system is as follows:

Step A1: After the command and control center and each mobile emergency device are deployed, each node establishes a self-organizing network link through a dedicated MESH transceiver module to achieve networking, and then each functional module of the node starts working, that is, executing steps B1, C1, D1 and E1.

Step B1: The camera module monitors the surrounding environment in real time. If it detects a person asking for help, a new danger or other abnormal situation, then execute step B2; otherwise, continue to execute step B1.

Step B2: The data processor processes the video data. When there is object movement, it starts recording video information. The storage unit caches the video data to facilitate subsequent data transmission.

Step B3: The central processor module calls the satellite positioning module to determine the location information of the node.

Step B3: The central processor module sends the positioning information and video data to the command and control information through the ad hoc network communication link.

Step B4: The command and control center makes a decision based on the information, and broadcasts the decision information to each node through the self-organizing network communication link or unicasts it to a rescue node, and then the node continues to execute step B1.

Step C1: The sensor monitors the surrounding environment information in real time to determine whether the surrounding environment is abnormal. For example, in a fire, a gas smoke sensor is used to monitor the surrounding gas smoke. If the gas smoke concentration exceeds the set threshold, it is marked as abnormal and the abnormal processing process is executed. If an abnormal situation occurs, step C2 is executed, otherwise the corresponding display component of the information display module displays that the environment is normal.

Step C2: The corresponding display component of the information display module displays the abnormal environment, such as setting the warning light to flash, the single soldier's handheld display screen to prompt, etc., to give reminders to surrounding nodes or personnel.

Step C3: The data processor unit pre-processes the monitored data information, determines the type of sensor by judging which IO interface the exception comes from, and thus clarifies the type of exception. The network processor uses the datatype bit in the MAC frame header FrameHeader to mark the data type and uses the storage unit to cache the sensor data.

Step C4: The central processor module calls the satellite positioning module to locate the position of the node, and caches the positioning information and sensor data information. The network processor unit packages the information and uses the self-organizing network communication link to send the data information to the command and control center and other destination nodes.

Step C5: After receiving the information, the command and control center makes corresponding deployments and then continues to execute step C1.

Step D1: The WIFI module radiates signals to provide a network interface for terminal devices in the accident area, allowing the terminal devices to transmit auxiliary information such as text, images, and voice back.

Step D2: The central processor module determines whether there is a terminal device sending back information. If so, execute step D3; otherwise, continue to execute step D1.

Step D3: The storage unit caches the data sent back by the terminal device.

Step D4: The WIFI unit gives a response message to the terminal device, reminding the terminal that the emergency communication node has received and processed the information, and at the same time sends the accident information and rescue guide to the terminal to ensure the safety of personnel.

Step D5: The central processor module calls the satellite positioning module to obtain the node location information.

Step D6: The node network processor module sends the information to the command and control center and other destination nodes through a dedicated MESH self-organizing network link.

Step D7: After receiving the information, the command and control center makes deployment and unicasts the deployment information to the on-site rescue personnel or organizes the rescue, and then continues to execute step D1.

Step E1: The mobile communication module broadcasts disaster information and rescue guides to all nearby terminals at regular intervals. On the one hand, the mobile communication module can provide public network access for terminal devices. On the other hand, nodes equipped with mobile communication units can use the public network to establish communication links with the command and control center or other nodes equipped with mobile communication units through the mobile communication module, and to a certain extent, restore the mobile communication system in the accident area. For power consumption considerations, mobile communication modules are often carried by fixed emergency communication nodes, unmanned vehicles and other nodes that can be equipped with large-capacity batteries.

By executing the above steps, the mobile emergency communication equipment provided by the embodiment of the present invention can realize environmental monitoring of the accident site through the camera unit and sensor unit of the information collection module, realize the function of providing network access for terminal devices in the accident area through the WIFI unit, realize the establishment and restoration of mobile communication links in the accident area while broadcasting disaster information and rescue information through the mobile communication unit, establish a dedicated self-organizing network communication link through the self-organizing network module, and the data information in the accident area is mainly transmitted by the self-organizing network communication link, so that a mobile emergency communication system capable of temporary communication can be re-established in the accident area where the communication is interrupted. In this way, the outside world can quickly learn about the distribution of people in the disaster area or the disaster situation, and send disaster relief dispatch instructions and evacuation route planning plans and other information to the disaster area.

The dedicated MESH network communication link, the WIFI module communication link and the mobile communication network link are in different communication channels.

In the third embodiment, as shown in FIG9 , the steps for processing the internal signal of the mobile emergency communication device node are as follows:

Step S101: The transceiver antenna module monitors the channel status of the WIFI communication link, the dedicated ad hoc network communication link, and the mobile communication network link respectively. That is, when the signal strength received by the antenna is greater than the threshold set by the device, it is considered that there is a signal in the current channel, and the antenna starts to receive the signal. By continuously monitoring the channel status of the channel, the data information sent by the source node can be received in time. If a signal is detected, step S102 is executed, otherwise step S101 is continued.

Step S102: The network processor processes the signal and determines whether the destination address ip_addr in the frame header FrameHeader of the frame received by the MAC layer matches its own IP address, that is, determines whether the data is sent to itself. If so, extract the data and then execute step S103. If not, continue to determine whether the next hop node IP address next_addr of the frame is its own IP address. If so, forward the data, otherwise discard the data and then execute step S101.

Step S103: The data processor receives the data type datatype in the frame header FrameHeader of the frame through MAC, and determines the data information type, such as control information, data information, etc. The storage unit stores the data information and does not process the control information, etc. The storage unit stores the data to prevent the node from losing data when the communication is interrupted. On the other hand, in the face of high-frequency data, the data processor can directly read the data from the storage unit and hand it over to the network processor for processing and sending, thereby effectively reducing transmission collisions and blockages in the network and improving the throughput of the communication system.

Step S104: After the data processor completes the processing, the next step is performed, such as executing the control command in the control information, caching the data information, etc.

In the fourth embodiment, as shown in FIG10 , the specific implementation steps of the mobile emergency communication device node self-organizing module for processing the abnormal networking situation are as follows:

Step 1: The node establishes an ad hoc network communication link through the dedicated MESH network transceiver unit in the ad hoc network module, automatically detects routing nodes and updates routes.

Step 2: Determine whether the routing table in the emergency communication equipment node is empty. If it is not empty, it means that the node has been connected to the self-organizing network and can communicate with other nodes, and the self-organizing network link is normal; if it is empty, it means that the node is isolated and no communication link is established with other nodes, and execute step 3.

Step 3: The network processor module of the node sends a route search instruction, and the antenna sends a route search information. If a response is received from other nodes within a certain period of time, the route search is successful, and step 7 is executed, otherwise step 4 is executed.

Step 4: The information display unit displays a networking abnormality or makes a corresponding prompt response.

Step 5: The satellite positioning module obtains the location information of the current networking failure and stores the information.

Step 6: For movable nodes, such as unmanned vehicles, drones, individual rescue personnel, etc., the nodes are moved and then step 3 is executed. For fixed emergency communication nodes, step 3 is directly executed.

Step 7: The information display module stops displaying network abnormalities. The satellite positioning module obtains the current location information of the node and stores the location information.

Step 8: The network processor updates the routing table and establishes a self-organizing network communication link.

Step 9: The node transmits the previously stored location information of failed networking and the current location information of successful networking back to the command and control center through the self-organizing network communication link, and deletes the location information from the storage unit to release the storage space.

Step 10: The command and control center makes decisions based on the information sent by the nodes.

The above calculation examples of the present invention are only used to explain the calculation model and calculation process of the present invention in detail, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims (9)

1. A mobile emergency communication system based on wireless ad hoc network technology, characterized in that the system includes a command and control center, mobile emergency communication equipment and communication terminal equipment, wherein: The mobile emergency communication device is set in the accident area, and the mobile emergency communication device serves as a relay node for emergency communication, and is used to obtain environmental information and accident information in the sudden accident in real time; The command and control center is set up in a safe area outside the accident area and is used for decision-making and command of sudden accidents; the command and control center establishes a communication link with each mobile emergency communication device through an ad hoc network or public network access; The communication terminal device actively or passively establishes a communication link with the mobile emergency communication device; The mobile emergency communication device includes a central processor module, an information collection module, an information display module, a network access module, a dedicated MESH network transceiver module, a transceiver antenna module and a satellite positioning module; The central processor module integrates a storage unit, a control unit, a network processor unit and a data processor unit; The storage unit stores computer instructions, and the control unit controls the network processor unit and the data processor unit to execute the computer instructions; The information collection module includes a sensor unit, which is used to monitor the environmental information around the mobile emergency communication device and send the monitored abnormal environmental information and the location information of the mobile emergency communication device to the command and control center through the self-organizing network communication link; The process of establishing the self-organizing network communication link is as follows: Step 1: Each mobile emergency communication device realizes self-organizing network through a dedicated MESH network transceiver module to establish a self-organizing network communication link; Step 2: The command and control center broadcasts network test information to detect the networking status of each mobile emergency communication device; The specific process of step 2 is as follows: If all mobile emergency communication devices respond to the test message, the self-organizing network covers the entire accident area, and step three is continued; otherwise, if there are mobile emergency communication devices that do not respond to the test message, the self-organizing network does not cover the entire accident area, and step five is executed; Step 3: Each mobile emergency communication device starts a functional test to determine whether the working status of each module of the mobile emergency communication device is normal. If the working status of each module is normal, proceed to step 4; otherwise, report the abnormal information to the command and control center through the self-organizing network communication link, and the command and control center makes a decision and issues instructions; Step 4: Rescuers carry mobile emergency communication equipment into the accident area to carry out rescue operations; Step 5: The command and control center continues to deploy mobile emergency communication equipment according to the networking situation. After deploying new mobile emergency communication equipment, the dedicated MESH network transceiver module detects the newly added mobile emergency communication equipment and updates the route until the self-organizing network covers the entire accident area and executes step 3; The information display module is used to display the monitored abnormal information; The dedicated MESH network transceiver module is used for mobile emergency communication equipment to establish a self-organizing network communication link with the communication terminal equipment, and to realize the forwarding of data information; The network access module includes a WIFI unit, which provides a network interface for the communication terminal device, and is used for the communication terminal device to return text, image, and voice auxiliary information; when a communication terminal returns information, the storage unit caches the returned information, and the WIFI unit gives the communication terminal a response message that the returned information has been received; The satellite positioning module is called to obtain the location information of the communication terminal. The network processor unit sends the location information and feedback information of the communication terminal to the command and control center through the self-organizing network communication link. The command and control center transmits the deployment information to the on-site rescue personnel or organizes the personnel for rescue; The transceiver antenna module is used to monitor the channel status of the communication link. 2. According to claim 1, a mobile emergency communication system based on wireless ad hoc network technology is characterized in that the sensor unit is used to monitor the environmental information around the mobile emergency communication device, and send the monitored abnormal environmental information and the location information of the mobile emergency communication device to the command and control center through the ad hoc network communication link; the specific process is: When the sensor unit detects an abnormality, the information display module displays the environmental abnormality, and the data processor unit pre-processes the detected abnormal information to determine the abnormality type. The network processor unit uses the datatype bit in the frame header FrameHeader of the MAC frame to mark the abnormal data type; The satellite positioning module is called to determine the location information of the mobile emergency communication device, and the storage unit is used to cache the sensor monitoring data and location information. The network processor unit packages the location information and sensor data information and sends them to the command and control center through the self-organizing network communication link, and the command and control center makes the deployment. 3. According to claim 2, a mobile emergency communication system based on wireless ad hoc network technology is characterized in that the mobile emergency communication equipment is carried to the accident area by drones or unmanned vehicles, carried by rescue personnel to the accident area, or placed in the accident area by setting up temporary fixed installation points. 4. According to claim 3, a mobile emergency communication system based on wireless ad hoc network technology is characterized in that the information collection module also includes a camera unit, which is used to monitor the accident information near the mobile emergency communication equipment in real time, and when an abnormality is found, the video data information is transmitted to the data processor unit for processing and judgment, and the storage unit caches the video data; The satellite positioning module is called to determine the location information of the mobile emergency communication device, and the location information and video data information are sent to the command and control center through the self-organizing network communication link. The command and control center makes a decision and broadcasts the abnormal information through the self-organizing network communication link. 5. According to claim 4, a mobile emergency communication system based on wireless ad hoc network technology is characterized in that the communication terminal equipment includes handheld terminals of rescue personnel, mobile phones of disaster-stricken users, personal computers and walkie-talkies, the satellite positioning module is GPS or Beidou navigation, and the information display module includes a warning light, a single-soldier handheld display and a speaker. 6. According to claim 5, a mobile emergency communication system based on wireless ad hoc network technology is characterized in that the network access module also includes a mobile communication unit, and the mobile communication unit is a second-generation mobile communication unit, a third-generation mobile communication unit, a fourth-generation mobile communication unit, a fifth-generation mobile communication unit or a long-term evolution unit, and the mobile communication unit is used to broadcast disaster information and rescue information. 7. A mobile emergency communication system based on wireless ad hoc network technology according to claim 6, characterized in that the sensor unit includes a temperature sensor, a gas smoke sensor and a pressure sensor. 8. According to claim 7, a mobile emergency communication system based on wireless ad hoc network technology is characterized in that the judgment of the state of the ad hoc network communication link and the processing flow of the abnormal state are as follows: Step 1: determine whether the routing table in the mobile emergency communication device is empty. If it is not empty, it means that the self-organizing network communication link of the mobile emergency communication device is normal; if it is empty, it means that the self-organizing network communication link of the mobile emergency communication device is abnormal, and execute step 2; Step 2: The network processor unit of the mobile emergency communication device sends a route search instruction, and the antenna sends a route search information. If a response is received from other mobile emergency communication devices, that is, the route search is successful, execute step 6, otherwise execute step 3; Step 3: The information display module displays that the ad hoc network is abnormal or makes a corresponding prompt response; Step 4: The satellite positioning module obtains the location information of the current ad hoc network failure and stores the location information; Step 5: Change the location of other mobile emergency communication devices and then execute step 2; Step 6: The information display module stops displaying the network abnormality, and the satellite positioning module obtains the current location information of each mobile emergency communication device and stores the obtained location information; Step 7: The network processor unit updates the routing table and establishes a self-organizing network communication link; Step 8: The mobile emergency communication device packages and transmits the stored location information when the ad hoc network fails and the current location information back to the command and control center through the ad hoc network communication link; Step 9: The command and control center makes decisions based on the information sent by each mobile emergency communication device. 9. A mobile emergency communication system based on wireless ad hoc network technology according to claim 8, characterized in that the system also includes a battery management module, which is used to provide a stable power supply for the mobile emergency communication equipment.