CN117768868B - Wireless emergency communication method, device and storage medium - Google Patents
Wireless emergency communication method, device and storage medium Download PDFInfo
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Abstract
The invention is applicable to the technical field of networking communication, and provides a wireless emergency communication method, a defect detection device and a storage medium, wherein the wireless emergency communication method comprises the following steps: a plurality of second emergency rescue vehicles receive the first detection frames and broadcast second detection frames; the second emergency rescue vehicle selects a first relay node from the plurality of third emergency rescue vehicles according to the first response frames corresponding to the plurality of third emergency rescue vehicles; and the first emergency rescue vehicle selects a second relay node from a plurality of second emergency rescue vehicles according to the first coordinate position, the first signal intensity, the second coordinate position and the second signal intensity. Through the steps, the emergency rescue vehicles can be connected with the cellular network by utilizing the self-organizing network, so that effective communication under disaster scenes is realized. Independent of infrastructure and satellite communications, reliable communication services can be provided in extreme weather conditions.
Description
Technical Field
The invention belongs to the technical field of networking communication, and particularly relates to a method, a device and a storage medium for wireless emergency communication.
Background
Emergency communication technology is a technology for transferring information and establishing contact in case of emergency. The techniques are mainly used in the situations of natural disasters, emergencies, emergency rescue and the like to help organizations and individuals to communicate and coordinate effectively.
Since the infrastructure is often destroyed when a natural disaster or an artificial disaster occurs, effective communication cannot be performed. While satellite communications are not limited by infrastructure. It transmits signals through a satellite system and covers a wide area, providing communication connectivity even in the absence of a fixed communication infrastructure at the disaster site.
However, satellite communication also has certain drawbacks, firstly, the cost of satellite communication is high, and satellite communication is easily affected by extreme weather, resulting in communication interruption. In practical application scenarios, natural disasters often accompany the extreme weather, so that satellite communication is difficult to provide effective communication, which is a technical problem to be solved urgently.
Disclosure of Invention
In view of the above, the embodiments of the present invention provide a method, an apparatus and a storage medium for wireless emergency communication, so as to solve the technical problem that in an actual application scenario, natural disasters often accompany extreme weather, and satellite communication is difficult to provide effective communication.
A first aspect of an embodiment of the present invention provides a method for wireless emergency communication, where the method for wireless emergency communication is applied to a plurality of emergency rescue vehicles, and the method for wireless emergency communication includes:
broadcasting a first detection frame by a first emergency assistance vehicle;
a plurality of second emergency rescue vehicles receive the first detection frames and broadcast second detection frames;
After receiving the second detection frame, the third emergency rescue vehicle returns a first response frame to the second emergency rescue vehicle; the information in the first response frame includes a first coordinate location and a first signal strength of the third emergency rescue vehicle;
The second emergency rescue vehicle selects a first relay node from the plurality of third emergency rescue vehicles according to the first response frames corresponding to the plurality of third emergency rescue vehicles;
The second emergency rescue vehicle returns a second response frame to the first emergency rescue vehicle; the information in the second response frame includes a relay quality score, a first coordinate location of the third emergency rescue vehicle, a first signal strength of the third emergency rescue vehicle, a second coordinate location of the second emergency rescue vehicle, and a second signal strength of the second emergency rescue vehicle; the relay quality score is calculated by corresponding information of the second emergency rescue vehicle and the third emergency rescue vehicle;
The first emergency rescue vehicle selects a second relay node from a plurality of second emergency rescue vehicles according to the first coordinate position, the first signal intensity, the second coordinate position and the second signal intensity;
The first emergency assistance vehicle sends communication data to the second relay node, and the second relay node sends the communication data to the first relay node;
And taking the first relay node as the first emergency rescue vehicle, and executing the step of broadcasting a first detection frame and the subsequent steps of the first emergency rescue vehicle until the communication data is sent to a cellular network.
Further, the first detection frame comprises a direction vector;
The method further comprises, before the first emergency assistance vehicle broadcasts the first probe frame:
acquiring a first track point at which the first emergency assistance vehicle is disconnected from the cellular network;
acquiring a second track point where the first emergency rescue vehicle is currently located;
Calculating the direction vector according to the first track point and the second track point; the direction vector is used for representing the communication topology connection direction.
Further, the step of selecting, by the second emergency rescue vehicle, the first relay node from the plurality of third emergency rescue vehicles according to the first response frames corresponding to the plurality of third emergency rescue vehicles, includes:
extracting the direction vector in the first detection frame;
calculating a first straight line according to the first coordinate position and the first track point;
Calculating a first direction included angle between the first straight line and the direction vector;
Calculating a coordinate distance according to the first coordinate position and the second coordinate position;
Acquiring a plurality of preset weights, and calculating the relay quality scores according to the first direction included angles, the coordinate distances, the first signal intensities and the preset weights;
and taking the third emergency rescue vehicle corresponding to the maximum relay quality score as the first relay node.
Further, the step of obtaining a plurality of preset weights and calculating a relay quality score according to the direction included angle, the coordinate distance, the first signal strength and the plurality of preset weights includes:
substituting the direction included angle, the coordinate distance, the first signal strength and the preset weights into the following formula I to obtain the relay quality score;
The first formula is as follows:
Wherein C represents the relay quality score, S 1 represents the first signal strength, d 1 represents the coordinate distance, α, β and γ represent the plurality of preset weights, and θ represents the direction included angle.
Further, the step of selecting a second relay node among the plurality of second emergency rescue vehicles by the first emergency rescue vehicle according to the relay quality score, the first coordinate position, the first signal strength, the second coordinate position, and the second signal strength includes:
calculating a first vehicle distance between a first emergency rescue vehicle and a second emergency rescue vehicle;
calculating a second vehicle distance between the second emergency rescue vehicle and the third emergency rescue vehicle;
Calculating the length of the opposite sides of the first triangle according to the first straight line and the first direction angle;
calculating the total distance between the first track point and the second track point;
Subtracting the length of the opposite sides of the first triangle from the total distance to obtain a first effective communication distance;
calculating a second straight line according to the second coordinate position and the first track point;
calculating a second direction included angle between the second straight line and the direction vector;
calculating the length of the opposite sides of the second triangle according to the second straight line and the second direction angle;
Subtracting the length of the opposite sides of the second triangle from the total distance to obtain a second effective communication distance;
Calculating the communication topology quality corresponding to each second emergency rescue vehicle according to the first effective communication distance, the second effective communication distance, the relay quality score, the first coordinate position, the first signal strength, the second coordinate position and the second signal strength;
and selecting a second relay node from a plurality of second emergency rescue vehicles according to the communication topology quality.
Further, the step of calculating the communication topology quality corresponding to each second emergency rescue vehicle according to the first effective communication distance, the second effective communication distance, the relay quality score, the first coordinate position, the first signal strength, the second coordinate position and the second signal strength includes:
Substituting the first vehicle distance, the second vehicle distance, the first effective communication distance, the second effective communication distance, the relay quality score, the first coordinate position, the first signal intensity, the second coordinate position and the second signal intensity into a formula II to obtain the communication topology quality;
The formula II is as follows:
Wherein Q represents the communication topology quality, R 1 represents the first effective communication distance, R 2 represents the second effective communication distance, S 1 represents the first signal strength, S 2 represents the second signal strength, d 1 represents x 1 and y 1 represents the first coordinate position, x 2 and y 2 represent the second coordinate position, σ is a constant term, C represents the relay quality score, d 1 represents the first vehicle distance, and d 2 represents the second vehicle distance.
Further, after the step of the first emergency assistance vehicle transmitting communication data to the second relay node, the second relay node transmitting the communication data to the first relay node, the method further includes:
If the first relay node does not receive the third response frame after broadcasting the second detection frame, a fourth response frame is sent to the second relay node;
the second relay node forwards the fourth response frame to the first emergency rescue vehicle;
After receiving the fourth response frame, the first emergency assistance vehicle returns to execute the step of broadcasting a first detection frame by the first emergency assistance vehicle and the subsequent steps.
A second aspect of an embodiment of the present invention provides a device for wireless emergency communication, including:
a broadcasting unit for broadcasting a first detection frame by a first emergency assistance vehicle;
The receiving unit is used for receiving the first detection frames by a plurality of second emergency rescue vehicles and broadcasting the second detection frames;
The first sending unit is used for returning a first response frame to the second emergency rescue vehicle after the third emergency rescue vehicle receives the second detection frame; the information in the first response frame includes a first coordinate location and a first signal strength of the third emergency rescue vehicle;
The selection unit is used for the second emergency rescue vehicle to select a first relay node from the plurality of third emergency rescue vehicles according to the first response frames corresponding to the plurality of third emergency rescue vehicles;
the second sending unit is used for returning a second response frame to the first emergency rescue vehicle by the second emergency rescue vehicle; the information in the second response frame includes a relay quality score, a first coordinate location of the third emergency rescue vehicle, a first signal strength of the third emergency rescue vehicle, a second coordinate location of the second emergency rescue vehicle, and a second signal strength of the second emergency rescue vehicle; the relay quality score is calculated by corresponding information of the second emergency rescue vehicle and the third emergency rescue vehicle;
the computing unit is used for selecting a second relay node from a plurality of second emergency rescue vehicles according to the first coordinate position, the first signal intensity, the second coordinate position and the second signal intensity by the first emergency rescue vehicle;
A third sending unit, configured to send communication data to the second relay node by the first emergency assistance vehicle, where the second relay node sends the communication data to the first relay node;
The processing unit is configured to take the first relay node as the first emergency rescue vehicle, and perform a step and a subsequent step of broadcasting a first probe frame by the first emergency rescue vehicle until the communication data is sent to a cellular network.
A third aspect of an embodiment of the present invention provides a terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method of the first aspect when executing the computer program.
A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method of the first aspect.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: a first probe frame is transmitted by a first emergency assistance vehicle for broadcasting a communication request. After the plurality of second emergency rescue vehicles receive the first probe frame, the second probe frame is broadcast for further communication. When the third emergency rescue vehicle receives the second detection frame, it returns a first response frame to the second emergency rescue vehicle. The first response frame contains information such as the coordinate position and the signal strength of the third emergency rescue vehicle. The second emergency rescue vehicle may select one of the plurality of third emergency rescue vehicles as the first relay node to communicate the communication data according to the first response frame returned by each of the plurality of third emergency rescue vehicles. After the first relay node is selected, the second emergency rescue vehicle returns a second response frame to the first emergency rescue vehicle. The second response frame comprises information such as a relay quality score, the position and signal intensity of the third emergency rescue vehicle, the position and signal intensity of the second emergency rescue vehicle and the like. The first emergency rescue vehicle selects a second relay node from the plurality of second emergency rescue vehicles based on the first coordinate location, the first signal strength, the second coordinate location, the second signal strength, and the like. The first emergency assistance vehicle transmits the communication data to the second relay node, and the second relay node transmits the data to the first relay node. This loops around until the communication data is sent into the cellular network. Through the steps, the emergency rescue vehicles can be connected with the cellular network by utilizing the self-organizing network, and communication data is transmitted through the relay nodes, so that effective communication under disaster scenes is realized. According to the technical scheme, reliable communication service can be provided under extreme weather conditions only through the communication module in the emergency rescue vehicle without depending on infrastructure communication facilities and satellite communication.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 shows a schematic flow chart of a method of wireless emergency communication provided by the invention;
FIG. 2 is a schematic diagram of a wireless emergency communication device according to an embodiment of the present invention;
fig. 3 shows a schematic diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
The embodiment of the invention provides a method, a device and a storage medium for wireless emergency communication, which are used for solving the technical problem that satellite communication is difficult to provide effective communication due to extreme weather accompanied by natural disasters in an actual application scene.
First, the invention provides a wireless emergency communication method which is applied to a plurality of emergency rescue vehicles. Referring to fig. 1, fig. 1 is a schematic flow chart of a method for wireless emergency communication according to the present invention. As shown in fig. 1, the method for wireless emergency communication may include the following steps:
step 101: broadcasting a first detection frame by a first emergency assistance vehicle;
The wireless emergency communication provided by the invention is applied to an anti-disaster relief environment with a plurality of emergency rescue vehicles, wherein the emergency rescue vehicles comprise, but are not limited to, personnel transportation vehicles, article transportation vehicles, communication base station vehicles and other rescue vehicles. The plurality of emergency rescue vehicles are each provided with a wireless communication module.
A unified communication protocol is adopted among a plurality of emergency rescue vehicles, so that the self-organizing network in the invention is realized, and wireless emergency communication is realized. The wireless emergency communication can be applied to devices with wireless communication modules, such as handheld terminals or fixed devices.
When the first emergency rescue vehicle goes deep into the emergency rescue environment, the first emergency rescue vehicle is disconnected with the cellular network, so that wireless communication connection with other emergency rescue vehicles is required to be established, and an self-organizing relay network is formed. Communication data is transmitted to the cellular network by other emergency rescue vehicles to resume normal wireless communication.
The self-organizing relay network provided by the invention is a mechanism for automatically establishing network connection, and a central controller is not needed. Communication links can be dynamically established and maintained between wireless communication modules in the emergency rescue vehicle to form a temporary communication network, so that the emergency rescue vehicle is flexibly suitable for various environments. An ad hoc relay network does not rely on traditional infrastructure such as telecommunications towers or network service providers, but rather consists of a plurality of emergency rescue vehicles distributed over a disaster area. The wireless communication module in each emergency rescue vehicle has the capability of routing and forwarding data, so that the whole network forms a stable and scattered and expanded communication system. An ad hoc relay network includes physical layer, link layer, network layer, and application layer protocols. The physical layer is responsible for transmitting data through wireless signals; link layer management of connections between devices and handling error correction; the network layer is responsible for data routing and forwarding; the application layer supports various communication applications such as voice calls, short messages, and data transmissions.
When the first emergency rescue vehicle needs to perform wireless communication, broadcasting a first detection frame to surrounding emergency rescue vehicles. The first detection frame is used for indicating the second emergency rescue vehicle to detect a third emergency rescue vehicle around the second emergency rescue vehicle so as to send information corresponding to the second emergency rescue vehicle and the third emergency rescue vehicle to the first emergency rescue vehicle, and further the first emergency rescue vehicle can select a communication route path so as to establish an effective high-quality wireless communication network.
It is noted that the first emergency rescue vehicle, the second emergency rescue vehicle and the third emergency rescue vehicle are communication groups, and each communication group performs steps 101 to 108 to obtain a communication routing path in the communication group. The next communication team also performs steps 101 through 108, establishing a subsequent communication routing path until connected into the cellular network.
The invention sets the route hop count in the communication group to two hops to prevent the communication from being interrupted when the emergency rescue vehicle moves due to the fact that the emergency rescue vehicle is in a static state or a moving state.
Optionally, before step 101, steps A1 to A3 are further included:
step A1: acquiring a first track point at which the first emergency assistance vehicle is disconnected from the cellular network;
And recording track points according to the preset frequency in the process of the first emergency rescue vehicle traveling. And when the first emergency rescue vehicle is disconnected from the cellular network, the current track point is used as a first track point.
Step A2: acquiring a second track point where the first emergency rescue vehicle is currently located;
Step A3: calculating the direction vector according to the first track point and the second track point; the direction vector is used for representing the communication topology connection direction.
In order to relay as much as possible along the minimum path in the subsequent communication topology selection, the present embodiment calculates a direction vector constituted by the first trajectory point and the second trajectory point. In the subsequent calculation process, the direction vector can be used as a guide, and a proper relay point can be selected.
Step 102: a plurality of second emergency rescue vehicles receive the first detection frames and broadcast second detection frames;
The second detection frame has the same function as the first detection frame and is used for detecting a third emergency rescue vehicle nearby the second emergency rescue vehicle.
Step 103: after receiving the second detection frame, the third emergency rescue vehicle returns a first response frame to the second emergency rescue vehicle; the information in the first response frame includes a first coordinate location and a first signal strength of the third emergency rescue vehicle;
And after the plurality of third emergency rescue vehicles receive the second detection frames, the plurality of third emergency rescue vehicles respectively return first response frames to the second emergency rescue vehicles. Wherein the information in the first response frame includes, but is not limited to, information such as a first coordinate position and a first signal strength of the third emergency rescue vehicle.
Step 104: the second emergency rescue vehicle selects a first relay node from the plurality of third emergency rescue vehicles according to the first response frames corresponding to the plurality of third emergency rescue vehicles;
specifically, step 104 specifically includes steps 1041 to 1046:
Step 1041: extracting the direction vector in the first detection frame;
step 1042: calculating a first straight line according to the first coordinate position and the first track point;
In order to evaluate whether the first coordinate position of the third emergency rescue vehicle approaches the direction vector, a first straight line formed by the first coordinate position and the first track point is calculated. And further, according to a first direction included angle between the direction vector and the first straight line, whether the first coordinate position is close to the direction vector is evaluated. The smaller the first direction included angle is, the closer the first coordinate position is to the direction vector. The larger the first direction angle, the farther the first coordinate position is from the direction vector.
Step 1043: calculating a first direction included angle between the first straight line and the direction vector;
Step 1044: calculating a coordinate distance according to the first coordinate position and the second coordinate position;
the coordinate distance is used to evaluate a distance between the second emergency vehicle and the third emergency vehicle.
Step 1045: acquiring a plurality of preset weights, and calculating the relay quality scores according to the first direction included angles, the coordinate distances, the first signal intensities and the preset weights;
specifically, step 1045 specifically includes:
substituting the direction included angle, the coordinate distance, the first signal strength and the preset weights into the following formula I to obtain the relay quality score;
The first formula is as follows:
Wherein C represents the relay quality score, S 1 represents the first signal strength, d 1 represents the coordinate distance, α, β and γ represent the plurality of preset weights, and θ represents the direction included angle.
Θ is the angle of direction, which is an arc number between 0 and pi, used to evaluate whether the first coordinate position is near the direction vector. The closer the direction angle is to 0, the better the relay quality. The closer the direction angle is to pi, the poorer the relay quality.
The application comprehensively considers the influence of various factors, and calculates the relay quality score based on the direction included angle, the coordinate distance, the first signal strength and the preset weights because the direction included angle, the coordinate distance, the first signal strength and the preset weights have certain influence on the relay quality score. The first formula is based on a large amount of experimental data and verification, but is not limited to the mathematical expression.
Step 1046: and taking the third emergency rescue vehicle corresponding to the maximum relay quality score as the first relay node.
In this embodiment, the direction information may be determined by extracting the direction vector in the first probe frame. From the first coordinate position and the first trajectory point, a first straight line may be calculated, thereby determining a straight line direction. By calculating the angle between the first straight line and the direction vector, the degree of deviation of the straight line from the direction can be determined. By calculating the distance between the first coordinate position and the second coordinate position, the spatial distance between the two coordinate points can be determined. The relay quality score can be calculated by acquiring a plurality of preset weights and combining the first direction included angle, the coordinate distance, the first signal strength and the plurality of preset weights. And according to the third emergency rescue vehicle corresponding to the maximum relay quality score, determining the vehicle as the first relay node. In summary, according to the technical scheme, the optimal first relay node can be selected by calculating parameters such as a direction vector, a linear included angle, a coordinate distance, signal strength and the like.
Step 105: the second emergency rescue vehicle returns a second response frame to the first emergency rescue vehicle; the information in the second response frame includes a relay quality score, a first coordinate location of the third emergency rescue vehicle, a first signal strength of the third emergency rescue vehicle, a second coordinate location of the second emergency rescue vehicle, and a second signal strength of the second emergency rescue vehicle; the relay quality score is calculated by corresponding information of the second emergency rescue vehicle and the third emergency rescue vehicle;
Step 106: the first emergency rescue vehicle selects a second relay node from a plurality of second emergency rescue vehicles according to the first coordinate position, the first signal intensity, the second coordinate position and the second signal intensity;
Specifically, step 106 specifically includes steps 1061 to 1071:
Step 1061: calculating a first vehicle distance between a first emergency rescue vehicle and a second emergency rescue vehicle;
Step 1062: calculating a second vehicle distance between the second emergency rescue vehicle and the third emergency rescue vehicle;
Step 1063: calculating the length of the opposite sides of the first triangle according to the first straight line and the first direction angle;
Based on the cosine law, the length of the opposite side of the first triangle is calculated according to the first straight line and the first direction angle.
Step 1064: calculating the total distance between the first track point and the second track point;
The total distance represents the distance between the signal disconnection point and the first emergency rescue vehicle.
Step 1065: subtracting the length of the opposite sides of the first triangle from the total distance to obtain a first effective communication distance;
the first effective communication distance refers to a communication distance between the second emergency rescue vehicle and the third emergency rescue vehicle, and is a projection on a direction vector.
Step 1066: calculating a second straight line according to the second coordinate position and the first track point;
step 1067: calculating a second direction included angle between the second straight line and the direction vector;
step 1068: calculating the length of the opposite sides of the second triangle according to the second straight line and the second direction angle;
step 1069: subtracting the length of the opposite sides of the second triangle from the total distance to obtain a second effective communication distance;
the second effective communication distance refers to a communication distance between the first emergency rescue vehicle and the second emergency rescue vehicle, and is a projection on a direction vector.
Step 1070: calculating the communication topology quality corresponding to each second emergency rescue vehicle according to the first effective communication distance, the second effective communication distance, the relay quality score, the first coordinate position, the first signal strength, the second coordinate position and the second signal strength;
specifically, step 1068 specifically includes:
calculating a first vehicle distance between a first emergency rescue vehicle and a second emergency rescue vehicle;
calculating a second vehicle distance between the second emergency rescue vehicle and the third emergency rescue vehicle;
Substituting the first vehicle distance, the second vehicle distance, the first effective communication distance, the second effective communication distance, the relay quality score, the first coordinate position, the first signal intensity, the second coordinate position and the second signal intensity into a formula II to obtain the communication topology quality;
The formula II is as follows:
Wherein Q represents the communication topology quality, R 1 represents the first effective communication distance, R 2 represents the second effective communication distance, S 1 represents the first signal strength, S 2 represents the second signal strength, d 1 represents x 1 and y 1 represents the first coordinate position, x 2 and y 2 represent the second coordinate position, σ is a constant term, C represents the relay quality score, d 1 represents the first vehicle distance, and d 2 represents the second vehicle distance.
The application comprehensively considers the influence of various factors, and calculates the communication topology quality based on the first vehicle distance, the second vehicle distance, the first effective communication distance, the second effective communication distance, the relay quality score, the first coordinate position, the first signal strength, the second coordinate position and the second signal strength because the first vehicle distance, the second vehicle distance, the first effective communication distance, the second effective communication distance, the relay quality score, the first coordinate position, the first signal strength, the second coordinate position and the second signal strength have certain influence on the communication topology quality. The second formula is based on a large amount of experimental data and verification, but is not limited to the mathematical expression.
Step 1071: and selecting a second relay node from a plurality of second emergency rescue vehicles according to the communication topology quality.
And taking the second emergency rescue vehicle corresponding to the maximum communication topology quality as a second relay node.
It is appreciated that in steps 1041-1045, the second emergency rescue vehicle is bound to the third emergency rescue vehicle based on the relay quality score to form a communication team. In steps 1061 through 1071, a first emergency assistance vehicle is combined with a plurality of communication groups to calculate a communication topology quality. And further selecting a second emergency rescue vehicle corresponding to the maximum communication topology quality as a second relay node to form a communication topology.
In the present embodiment, the spatial distance between the first emergency rescue vehicle and the second emergency rescue vehicle may be determined by calculating the distance between the second emergency rescue vehicle and the third emergency rescue vehicle. According to the second vehicle distance and the first direction angle, the length of the opposite side of the first triangle can be calculated and used for the communication distance between the second emergency rescue vehicle and the third emergency rescue vehicle. The total distance between the first track point and the second track point is calculated and used for describing the track length between the first emergency rescue vehicle and the network disconnection point. The first effective communication distance can be obtained by subtracting the length of the opposite side of the first triangle from the total distance, and is used for evaluating the effective communication distance between the second emergency rescue vehicle and the third emergency rescue vehicle. From the second coordinate position and the first trajectory point, a second straight line may be calculated. And calculating an included angle between the second straight line and the direction vector, so that the degree of deviation between the communication direction of the first emergency rescue vehicle and the second emergency rescue vehicle and the vector direction can be calculated. The length of the opposite side of the second triangle can be calculated according to the first vehicle distance and the second direction angle. The second effective communication distance can be obtained by subtracting the length of the opposite side of the second triangle from the total distance, and is used for evaluating the effective communication range between the second emergency rescue vehicle and the first emergency rescue vehicle. According to the first effective communication distance, the second effective communication distance, the relay quality score, the first coordinate position, the first signal strength, the second coordinate position and the second signal strength, the communication topology quality corresponding to each communication topology can be calculated. And selecting a second relay node from the plurality of second emergency rescue vehicles according to the communication topology quality so as to improve the communication quality and the emergency rescue efficiency. In summary, according to the technical scheme, the optimal second relay node is selected by calculating parameters such as distance, angle, track, signal strength and the like, so that the wireless communication quality is improved.
Step 107: the first emergency assistance vehicle sends communication data to the second relay node, and the second relay node sends the communication data to the first relay node;
optionally, step a to step C are further included after step 107:
Step A: if the first relay node does not receive the third response frame after broadcasting the second detection frame, a fourth response frame is sent to the second relay node;
And (B) step (B): the second relay node forwards the fourth response frame to the first emergency rescue vehicle;
Step C: after receiving the fourth response frame, the first emergency assistance vehicle returns to execute the step of broadcasting a first detection frame by the first emergency assistance vehicle and the subsequent steps.
After broadcasting the second detection frame, the first relay node (i.e. the third emergency rescue vehicle) cannot detect other nearby emergency rescue vehicles, i.e. cannot relay communication data, and needs to reselect other communication topologies. Therefore, the second relay node (namely the second emergency rescue vehicle) needs to send the fourth response frame, and the second relay node forwards the fourth response frame to the first emergency rescue vehicle so as to instruct the first emergency rescue vehicle to reselect the communication topology, thereby improving the transmission rate and the effectiveness of wireless communication.
Step 108: and taking the first relay node as the first emergency rescue vehicle, and executing the step of broadcasting a first detection frame and the subsequent steps of the first emergency rescue vehicle until the communication data is sent to a cellular network.
Taking the first relay node as the first emergency rescue vehicle, and executing steps 101 to 108 until the communication data is sent to a cellular network.
As an alternative embodiment of the application, if the first emergency rescue vehicle can only detect a second emergency rescue vehicle, the second emergency rescue vehicle is directly used as a relay point. If the second emergency rescue vehicle can only detect one third emergency rescue vehicle, the third emergency rescue vehicle is directly used as a relay point.
In this embodiment, a first probe frame is sent by a first emergency assistance vehicle for broadcasting a communication request. After the plurality of second emergency rescue vehicles receive the first probe frame, the second probe frame is broadcast for further communication. When the third emergency rescue vehicle receives the second detection frame, it returns a first response frame to the second emergency rescue vehicle. The first response frame contains information such as the coordinate position and the signal strength of the third emergency rescue vehicle. The second emergency rescue vehicle may select one of the plurality of third emergency rescue vehicles as the first relay node to communicate the communication data according to the first response frame returned by each of the plurality of third emergency rescue vehicles. After the first relay node is selected, the second emergency rescue vehicle returns a second response frame to the first emergency rescue vehicle. The second response frame comprises information such as a relay quality score, the position and signal intensity of the third emergency rescue vehicle, the position and signal intensity of the second emergency rescue vehicle and the like. The first emergency rescue vehicle selects a second relay node from the plurality of second emergency rescue vehicles based on the first coordinate location, the first signal strength, the second coordinate location, the second signal strength, and the like. The first emergency assistance vehicle transmits the communication data to the second relay node, and the second relay node transmits the data to the first relay node. This loops around until the communication data is sent into the cellular network. Through the steps, the emergency rescue vehicles can be connected with the cellular network by utilizing the self-organizing network, and communication data is transmitted through the relay nodes, so that effective communication under disaster scenes is realized. According to the technical scheme, reliable communication service can be provided under extreme weather conditions only through the communication module in the emergency rescue vehicle without depending on infrastructure communication facilities and satellite communication.
Referring to fig. 2, fig. 2 is a schematic diagram of a wireless emergency communication device 2, and fig. 2 is a schematic diagram of the wireless emergency communication device according to the present invention, where the wireless emergency communication device shown in fig. 2 includes:
A broadcasting unit 21 for broadcasting a first probe frame by a first emergency assistance vehicle;
a receiving unit 22, configured to receive the first detection frames by a plurality of second emergency rescue vehicles, and broadcast second detection frames;
A first sending unit 23, configured to send a first response frame to the second emergency rescue vehicle after the third emergency rescue vehicle receives the second detection frame; the information in the first response frame includes a first coordinate location and a first signal strength of the third emergency rescue vehicle;
A selecting unit 24, configured to select a first relay node from a plurality of third emergency rescue vehicles according to a first response frame corresponding to each of the plurality of third emergency rescue vehicles by using the second emergency rescue vehicle;
A second transmitting unit 25, configured to return a second response frame to the first emergency rescue vehicle by the second emergency rescue vehicle; the information in the second response frame includes a relay quality score, a first coordinate location of the third emergency rescue vehicle, a first signal strength of the third emergency rescue vehicle, a second coordinate location of the second emergency rescue vehicle, and a second signal strength of the second emergency rescue vehicle; the relay quality score is calculated by corresponding information of the second emergency rescue vehicle and the third emergency rescue vehicle;
A calculating unit 26, configured to select a second relay node from a plurality of second emergency rescue vehicles according to the first coordinate position, the first signal strength, the second coordinate position, and the second signal strength;
A third transmitting unit 27, configured to transmit communication data to the second relay node by the first emergency assistance vehicle, where the second relay node transmits the communication data to the first relay node;
The processing unit 28 is configured to take the first relay node as the first emergency assistance vehicle, and perform a step of broadcasting a first probe frame by the first emergency assistance vehicle and a subsequent step until the communication data is sent into the cellular network.
The invention provides a wireless emergency communication device, which is used for sending a first detection frame by a first emergency rescue vehicle and broadcasting a communication request. After the plurality of second emergency rescue vehicles receive the first probe frame, the second probe frame is broadcast for further communication. When the third emergency rescue vehicle receives the second detection frame, it returns a first response frame to the second emergency rescue vehicle. The first response frame contains information such as the coordinate position and the signal strength of the third emergency rescue vehicle. The second emergency rescue vehicle may select one of the plurality of third emergency rescue vehicles as the first relay node to communicate the communication data according to the first response frame returned by each of the plurality of third emergency rescue vehicles. After the first relay node is selected, the second emergency rescue vehicle returns a second response frame to the first emergency rescue vehicle. The second response frame comprises information such as a relay quality score, the position and signal intensity of the third emergency rescue vehicle, the position and signal intensity of the second emergency rescue vehicle and the like. The first emergency rescue vehicle selects a second relay node from the plurality of second emergency rescue vehicles based on the first coordinate location, the first signal strength, the second coordinate location, the second signal strength, and the like. The first emergency assistance vehicle transmits the communication data to the second relay node, and the second relay node transmits the data to the first relay node. This loops around until the communication data is sent into the cellular network. Through the steps, the emergency rescue vehicles can be connected with the cellular network by utilizing the self-organizing network, and communication data is transmitted through the relay nodes, so that effective communication under disaster scenes is realized. According to the technical scheme, reliable communication service can be provided under extreme weather conditions only through the communication module in the emergency rescue vehicle without depending on infrastructure communication facilities and satellite communication.
Fig. 3 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 3, a terminal device 3 of this embodiment includes: a processor 30, a memory 31 and a computer program 32 stored in said memory 31 and executable on said processor 30, for example a program for wireless emergency communication. The processor 30, when executing the computer program 32, performs the steps of each of the above-described method embodiments of wireless emergency communication, such as steps 101 through 108 shown in fig. 1. Or the processor 30, when executing the computer program 32, performs the functions of the units in the above-described device embodiments, such as the functions of the units 21 to 28 shown in fig. 2.
By way of example, the computer program 32 may be divided into one or more units, which are stored in the memory 31 and executed by the processor 30to complete the present invention. The one or more units may be a series of computer program instruction segments capable of performing a specific function describing the execution of the computer program 32 in the one terminal device 3. For example, the computer program 32 may be partitioned into units having the following specific functions:
a broadcasting unit for broadcasting a first detection frame by a first emergency assistance vehicle;
The receiving unit is used for receiving the first detection frames by a plurality of second emergency rescue vehicles and broadcasting the second detection frames;
The first sending unit is used for returning a first response frame to the second emergency rescue vehicle after the third emergency rescue vehicle receives the second detection frame; the information in the first response frame includes a first coordinate location and a first signal strength of the third emergency rescue vehicle;
The selection unit is used for the second emergency rescue vehicle to select a first relay node from the plurality of third emergency rescue vehicles according to the first response frames corresponding to the plurality of third emergency rescue vehicles;
the second sending unit is used for returning a second response frame to the first emergency rescue vehicle by the second emergency rescue vehicle; the information in the second response frame includes a relay quality score, a first coordinate location of the third emergency rescue vehicle, a first signal strength of the third emergency rescue vehicle, a second coordinate location of the second emergency rescue vehicle, and a second signal strength of the second emergency rescue vehicle; the relay quality score is calculated by corresponding information of the second emergency rescue vehicle and the third emergency rescue vehicle;
the computing unit is used for selecting a second relay node from a plurality of second emergency rescue vehicles according to the first coordinate position, the first signal intensity, the second coordinate position and the second signal intensity by the first emergency rescue vehicle;
A third sending unit, configured to send communication data to the second relay node by the first emergency assistance vehicle, where the second relay node sends the communication data to the first relay node;
The processing unit is configured to take the first relay node as the first emergency rescue vehicle, and perform a step and a subsequent step of broadcasting a first probe frame by the first emergency rescue vehicle until the communication data is sent to a cellular network.
Including but not limited to a processor 30 and a memory 31. It will be appreciated by those skilled in the art that fig. 3 is merely an example of one type of terminal device 3 and is not meant to be limiting as to one type of terminal device 3, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., the one type of terminal device may also include input and output devices, network access devices, buses, etc.
The Processor 30 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), off-the-shelf Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 31 may be an internal storage unit of the terminal device 3, such as a hard disk or a memory of the terminal device 3. The memory 31 may also be an external storage device of the terminal device 3, such as a plug-in hard disk, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD) or the like, which are provided on the terminal device 3. Further, the memory 31 may also include both an internal storage unit and an external storage device of the one terminal device 3. The memory 31 is used for storing the computer program and other programs and data required for the one roaming control device. The memory 31 may also be used for temporarily storing data that has been output or is to be output.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
It should be noted that, because the content of information interaction and execution process between the above devices/units is based on the same concept as the method embodiment of the present invention, specific functions and technical effects thereof may be referred to in the method embodiment section, and will not be described herein.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present invention. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
Embodiments of the present invention also provide a computer readable storage medium storing a computer program which, when executed by a processor, implements steps for implementing the various method embodiments described above.
Embodiments of the present invention provide a computer program product which, when run on a mobile terminal, causes the mobile terminal to perform steps that enable the implementation of the method embodiments described above.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiments, and may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing device/terminal apparatus, recording medium, computer Memory, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), electrical carrier signals, telecommunications signals, and software distribution media. Such as a U-disk, removable hard disk, magnetic or optical disk, etc. In some jurisdictions, computer readable media may not be electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/network device and method may be implemented in other manners. For example, the apparatus/network device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units.
It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
As used in the present description and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to a detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is monitored" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon monitoring a [ described condition or event ]" or "in response to monitoring a [ described condition or event ]".
Furthermore, the terms "first," "second," "third," and the like in the description of the present specification and in the appended claims, are used for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the invention. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A method of wireless emergency communication, wherein the method of wireless emergency communication is applied to a plurality of emergency rescue vehicles, the method of wireless emergency communication comprising:
broadcasting a first detection frame by a first emergency assistance vehicle;
a plurality of second emergency rescue vehicles receive the first detection frames and broadcast second detection frames;
After receiving the second detection frame, the third emergency rescue vehicle returns a first response frame to the second emergency rescue vehicle; the information in the first response frame includes a first coordinate location and a first signal strength of the third emergency rescue vehicle;
The second emergency rescue vehicle selects a first relay node from the plurality of third emergency rescue vehicles according to the first response frames corresponding to the plurality of third emergency rescue vehicles;
The second emergency rescue vehicle returns a second response frame to the first emergency rescue vehicle; the information in the second response frame includes a relay quality score between a second emergency rescue vehicle and a third emergency rescue vehicle, a first coordinate location of the third emergency rescue vehicle, a first signal strength of the third emergency rescue vehicle, a second coordinate location of the second emergency rescue vehicle, and a second signal strength of the second emergency rescue vehicle; the relay quality score is calculated by corresponding information of the second emergency rescue vehicle and the third emergency rescue vehicle and is used for evaluating the communication quality between the second emergency rescue vehicle and the third emergency rescue vehicle;
The first emergency rescue vehicle selects a second relay node from a plurality of second emergency rescue vehicles according to the relay quality score, the first coordinate position, the first signal strength, the second coordinate position and the second signal strength;
The first emergency assistance vehicle sends communication data to the second relay node, and the second relay node sends the communication data to the first relay node;
And taking the first relay node as the first emergency rescue vehicle, and executing the step of broadcasting a first detection frame and the subsequent steps of the first emergency rescue vehicle until the communication data is sent to a cellular network.
2. The method of wireless emergency communication of claim 1, wherein the first probe frame includes a direction vector;
The method further comprises, before the first emergency assistance vehicle broadcasts the first probe frame:
acquiring a first track point at which the first emergency assistance vehicle is disconnected from the cellular network;
acquiring a second track point where the first emergency rescue vehicle is currently located;
Calculating the direction vector according to the first track point and the second track point; the direction vector is used for representing the communication topology connection direction.
3. The method of wireless emergency communication of claim 2, wherein the step of the second emergency rescue vehicle selecting a first relay node among the plurality of third emergency rescue vehicles according to a first response frame corresponding to each of the plurality of third emergency rescue vehicles comprises:
extracting the direction vector in the first detection frame;
calculating a first straight line according to the first coordinate position and the first track point;
Calculating a first direction included angle between the first straight line and the direction vector;
Calculating a coordinate distance according to the first coordinate position and the second coordinate position;
Acquiring a plurality of preset weights, and calculating the relay quality scores according to the first direction included angles, the coordinate distances, the first signal intensities and the preset weights;
and taking the third emergency rescue vehicle corresponding to the maximum relay quality score as the first relay node.
4. The method of wireless emergency communication of claim 3, wherein the step of obtaining a plurality of preset weights and calculating a relay quality score based on the first direction angle, the coordinate distance, the first signal strength, and the plurality of preset weights comprises:
Substituting the first direction included angle, the coordinate distance, the first signal strength and the preset weights into the following formula I to obtain the relay quality score;
The first formula is as follows:
Wherein, Representing the quality score of the relay,Representing the strength of the first signal in question,The distance of the coordinates is represented by a distance,、AndA plurality of said preset weights are represented,Representing the first direction angle.
5. The method of wireless emergency communication of claim 2, wherein the step of the first emergency rescue vehicle selecting a second relay node among the plurality of second emergency rescue vehicles based on the relay quality score, the first coordinate location, the first signal strength, the second coordinate location, and the second signal strength comprises:
calculating a first vehicle distance between a first emergency rescue vehicle and a second emergency rescue vehicle;
calculating a second vehicle distance between the second emergency rescue vehicle and the third emergency rescue vehicle;
calculating the opposite side length of the first triangle according to the second vehicle distance and the first direction included angle;
calculating the total distance between the first track point and the second track point;
Subtracting the length of the opposite sides of the first triangle from the total distance to obtain a first effective communication distance;
calculating a second straight line according to the second coordinate position and the first track point;
calculating a second direction included angle between the second straight line and the direction vector;
Calculating the length of the opposite side of the second triangle according to the first vehicle distance and the second direction included angle;
Subtracting the length of the opposite sides of the second triangle from the total distance to obtain a second effective communication distance;
Calculating the communication topology quality corresponding to each second emergency rescue vehicle according to the first effective communication distance, the second effective communication distance, the relay quality score, the first coordinate position, the first signal strength, the second coordinate position and the second signal strength;
and selecting a second relay node from a plurality of second emergency rescue vehicles according to the communication topology quality.
6. The method of wireless emergency communication of claim 5, wherein the step of calculating the corresponding communication topology quality for each of the second emergency rescue vehicles based on the first effective communication distance, the second effective communication distance, the relay quality score, the first coordinate location, the first signal strength, the second coordinate location, and the second signal strength comprises:
Substituting the first vehicle distance, the second vehicle distance, the first effective communication distance, the second effective communication distance, the relay quality score, the first coordinate position, the first signal intensity, the second coordinate position and the second signal intensity into a formula II to obtain the communication topology quality;
The formula II is as follows:
Wherein, Representing the quality of the communication topology in question,Representing the first effective communication distance in question,Representing the second effective communication distance,Representing the strength of the first signal in question,Representing the intensity of the said second signal,AndThe first coordinate position is represented as such,AndRepresenting the position of the second coordinate,Is a constant term which is used to determine the degree of freedom,Representing the quality score of the relay,Representing the distance of the first vehicle in question,Representing the second vehicle distance.
7. The method of wireless emergency communication of claim 1, further comprising, after the step of the first emergency assistance vehicle transmitting communication data to the second relay node, the second relay node transmitting the communication data to the first relay node:
If the first relay node does not receive the third response frame after broadcasting the second detection frame, a fourth response frame is sent to the second relay node;
the second relay node forwards the fourth response frame to the first emergency rescue vehicle;
After receiving the fourth response frame, the first emergency assistance vehicle returns to execute the step of broadcasting a first detection frame by the first emergency assistance vehicle and the subsequent steps.
8. A device for wireless emergency communication, the device comprising:
a broadcasting unit for broadcasting a first detection frame by a first emergency assistance vehicle;
The receiving unit is used for receiving the first detection frames by a plurality of second emergency rescue vehicles and broadcasting the second detection frames;
The first sending unit is used for returning a first response frame to the second emergency rescue vehicle after the third emergency rescue vehicle receives the second detection frame; the information in the first response frame includes a first coordinate location and a first signal strength of the third emergency rescue vehicle;
The selection unit is used for the second emergency rescue vehicle to select a first relay node from the plurality of third emergency rescue vehicles according to the first response frames corresponding to the plurality of third emergency rescue vehicles;
The second sending unit is used for returning a second response frame to the first emergency rescue vehicle by the second emergency rescue vehicle; the information in the second response frame includes a relay quality score between a second emergency rescue vehicle and a third emergency rescue vehicle, a first coordinate location of the third emergency rescue vehicle, a first signal strength of the third emergency rescue vehicle, a second coordinate location of the second emergency rescue vehicle, and a second signal strength of the second emergency rescue vehicle; the relay quality score is calculated by corresponding information of the second emergency rescue vehicle and the third emergency rescue vehicle and is used for evaluating the communication quality between the second emergency rescue vehicle and the third emergency rescue vehicle;
the computing unit is used for selecting a second relay node from a plurality of second emergency rescue vehicles according to the first coordinate position, the first signal intensity, the second coordinate position and the second signal intensity by the first emergency rescue vehicle;
A third sending unit, configured to send communication data to the second relay node by the first emergency assistance vehicle, where the second relay node sends the communication data to the first relay node;
The processing unit is configured to take the first relay node as the first emergency rescue vehicle, and perform a step and a subsequent step of broadcasting a first probe frame by the first emergency rescue vehicle until the communication data is sent to a cellular network.
9. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any one of claims 1 to 7.
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| CN113630715A (en) * | 2021-07-30 | 2021-11-09 | 中汽创智科技有限公司 | Vehicle rescue information processing method and device and storage medium |
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| CN111757295A (en) * | 2019-03-27 | 2020-10-09 | 大众汽车有限公司 | Vehicle, system, apparatus, method and computer program for a user equipment of a mobile communication system |
| CN113473436A (en) * | 2021-03-29 | 2021-10-01 | 上海市地震局 | Routing method of post-earthquake emergency communication network based on four-quadrant mobile model |
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