Distributed communication system and control method

A distributed communication system and control method

technical field

The present application relates to the technical field of communication, and in particular to a distributed communication system and a control method.

Background technique

Most of the current communication devices are wireless communication devices, and wireless communication devices usually need base stations to realize wireless communication. When the base station is damaged or its radio coverage area is unreachable, in order to ensure the normal communication of the wireless communication equipment, it is usually necessary to set up a temporary wireless router to use the wireless router to assist the communication work of the wireless communication equipment.

However, in the case of natural disasters such as earthquakes, if a temporary wireless router is manually installed after the natural disaster occurs, it will take a lot of deployment time, and it is difficult to ensure that the deployed wireless router signal can cover the entire disaster area.

Contents of the invention

The present application provides a distributed communication system and a control method to solve the defects of the prior art such as low flexibility.

The first aspect of the present application provides a distributed communication system, including: a bottom-level terminal, a middle-level communication system, and a satellite; wherein, the middle-level communication system includes a plurality of low-altitude devices with wireless communication capabilities;

The low-altitude device collects a communication request sent by the bottom terminal, and establishes a communication connection with the bottom terminal according to the communication request, so as to provide communication services for the bottom terminal;

When the low-altitude equipment cannot meet the communication requirements of the bottom terminal, forward the communication task of the bottom terminal to the satellite;

The satellite receives and processes the communication tasks forwarded by the low-altitude equipment.

Optionally, the middle-level communication system is used to collect location information and signal power of each bottom-level terminal; and adjust the geographic location and signal gain of the low-altitude device according to the location information and signal power of each bottom-level terminal.

Optionally, the underlying terminal also generates an edge computing task, and judges whether the local remaining computing resources satisfy the edge computing task; if the local remaining computing resources satisfy the edge computing task, execute the edge computing task; if the local If the remaining computing resources cannot satisfy the edge computing task, the edge computing task is sent to the middle-level communication system;

The low-altitude device in the middle-level communication system receives the edge computing task, obtains the task information of the edge computing task, and judges whether its own remaining computing resources meet the edge computing task according to the task information; if its own remaining computing resources If the edge computing task is satisfied, the edge computing task is executed.

Optionally, if the remaining computing resources of the low-altitude device do not satisfy the edge computing task, obtain the remaining computing resources of other low-altitude devices and location information of other low-altitude devices;

Determine the target edge computing low-altitude device according to the remaining computing resources of the other low-altitude devices and the location information of other low-altitude devices;

Forwarding the edge computing task to the target edge computing low-altitude device.

Optionally, if the remaining computing resources of the low-altitude device do not satisfy the edge computing task, the edge computing task is forwarded to the satellite.

Optionally, a sensor is attached to the low-altitude device, and the sensor is used to collect disaster information in a preset area;

After the low-altitude equipment obtains the disaster information, it sends the disaster information to a disaster command center.

Optionally, the bottom-level terminal and the middle-level communication system are constructed based on a mobile ad hoc network.

Optionally, external communication equipment and/or lightweight intermediate protocols are deployed on the satellite and low-altitude equipment, so that the satellite and low-altitude equipment can adapt to multiple communication protocols.

Optionally, each low-altitude device in the bottom-level terminal and the middle-level communication system is equipped with an emergency frequency band for transmitting emergency information.

The second aspect of the present application provides a control method for a distributed communication system, which is applied to a distributed communication system. The distributed communication system includes a bottom-level terminal, a middle-level communication system, and a satellite; wherein, the middle-level communication system includes multiple Possess the low-altitude equipment of wireless communication capability; Described method comprises:

controlling the low-altitude device to collect a communication request sent by the bottom terminal, and establishing a communication connection with the bottom terminal according to the communication request, so as to provide communication services for the bottom terminal;

When the low-altitude device cannot meet the communication requirements of the bottom terminal, control the low-altitude device to forward the communication task of the bottom terminal to the satellite;

The satellite is controlled to receive and process the communication tasks forwarded by the low-altitude equipment.

Optionally, the method also includes:

Controlling the middle-level communication system to collect location information and signal power of each bottom-level terminal; adjusting the geographic location and signal gain of the low-altitude device according to the location information and signal power of each bottom-level terminal.

Optionally, the method also includes:

Controlling the underlying terminal to also generate an edge computing task, and judging whether the remaining local computing resources satisfy the edge computing task; if the remaining local computing resources satisfy the edge computing task, then controlling the underlying terminal to execute the edge computing task; If the remaining local computing resources cannot satisfy the edge computing task, control the bottom terminal to send the edge computing task to the middle-level communication system;

Control the low-altitude device in the middle-level communication system to receive the edge computing task, obtain the task information of the edge computing task, and judge whether its remaining computing resources meet the edge computing task according to the task information; if its own remaining computing resources meet the For the edge computing task, control the low-altitude device to execute the edge computing task.

Optionally, the method also includes:

If the remaining computing resources of the low-altitude device do not satisfy the edge computing task, control the low-altitude device to obtain the remaining computing resources of other low-altitude devices and location information of other low-altitude devices;

Determine the target edge computing low-altitude device according to the remaining computing resources of the other low-altitude devices and the location information of other low-altitude devices;

Forwarding the edge computing task to the target edge computing low-altitude device.

Optionally, the method also includes:

If the remaining computing resources of the low-altitude device do not satisfy the edge computing task, the low-altitude device is controlled to forward the edge computing task to the satellite.

Optionally, a sensor is attached to the low-altitude equipment, and the method also includes:

Control sensors to collect disaster information in preset areas;

Controlling the low-altitude equipment to send the disaster information to a disaster command center after obtaining the disaster information.

The technical solution of the present application has the following advantages:

The present application provides a distributed communication system and a control method. The system includes: a bottom-level terminal, a middle-level communication system, and a satellite; wherein, the middle-level communication system includes a plurality of low-altitude devices with wireless communication capabilities; According to the communication request, establish a communication connection with the underlying terminal to provide communication services for the underlying terminal; when the low-altitude equipment cannot meet the communication needs of the underlying terminal, forward the communication task of the underlying terminal to the satellite; the satellite receives and processes the forwarding of the low-altitude equipment communication tasks. The system provided by the above scheme provides communication services for bottom terminals by using multiple low-altitude devices in the middle-level communication system, which improves the communication efficiency of the system, and the deployment of low-altitude devices is convenient, which improves the flexibility of the system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description These are some embodiments of the present application, and those skilled in the art can also obtain other drawings based on these drawings.

FIG. 1 is a schematic diagram of a communication process of a distributed communication system provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an exemplary distributed communication system provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of an exemplary middle-level communication system provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of service coverage of an exemplary middle-level communication system provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another exemplary distributed communication system provided by the embodiment of the present application;

FIG. 6 is a schematic flow chart of a method for controlling a distributed communication system provided by an embodiment of the present application.

Through the above-mentioned drawings, specific embodiments of the present application have been shown, which will be described in more detail hereinafter. The drawings and written description are not intended to limit the scope of the disclosed concept in any way, but to illustrate the concept of the application for those skilled in the art by referring to specific embodiments.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application . Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

In addition, the terms "first", "second", etc. are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the descriptions of the following embodiments, "plurality" means more than two, unless otherwise specifically defined.

The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below in conjunction with the accompanying drawings.

An embodiment of the present application provides a distributed communication system, which is used to provide communication services for bottom-level terminals in disaster areas that cannot communicate normally. The system includes a bottom-level terminal, a middle-level communication system and satellites; wherein, the middle-level communication system includes a plurality of low-altitude devices with wireless communication capabilities.

Wherein, as shown in FIG. 1, it is a schematic diagram of a communication process of a distributed communication system provided in the embodiment of the present application, and the communication process is as follows:

Step 101, the low-altitude device collects a communication request sent by the bottom terminal, and establishes a communication connection with the bottom terminal according to the communication request, so as to provide communication services for the bottom terminal;

Step 102, when the low-altitude equipment cannot meet the communication requirements of the bottom terminal, forward the communication task of the bottom terminal to the satellite;

Step 103, the satellite receives and processes the communication task forwarded by the low-altitude device.

It should be noted that the underlying terminals specifically refer to communication devices such as mobile phones, computers, and tablets that cannot communicate normally in disaster areas or mining areas, and low-altitude devices can be flying devices such as drones or airplanes.

On the contrary, when the low-altitude device can meet the communication requirements of the bottom terminal, the low-altitude device will handle the communication task.

Among them, the communication tasks can be packet forwarding tasks and computing tasks.

Specifically, the low-altitude equipment collects the electromagnetic wave signal of each communication equipment in the disaster area, and when receiving the electromagnetic wave signal of any communication equipment, it takes the electromagnetic wave signal as a communication request and establishes a communication connection with the bottom terminal to realize the communication between the bottom terminal and the low-altitude system. Two-way communication between devices.

Among them, the low-altitude equipment takes advantage of the wider electromagnetic wave propagation space brought by the height advantage to expand its coverage. A low-altitude equipment can simultaneously provide higher-level communication services for a distributed mobile ad hoc network composed of multiple bottom-level terminals. , and includes longer-distance information routing and forwarding and task processing with higher computing power requirements.

Specifically, if the current low-altitude terminal sends a communication task/computation task to the low-altitude device that cannot be realized by the low-altitude device itself, such as the transmission distance exceeds the communication capability of the low-altitude device or the calculation task exceeds the computing power of the low-altitude device, etc., the low-altitude device can use the current The communication task is sent to the satellite, and the communication task is handled by the satellite.

Among them, the satellites and the low-altitude equipment in the middle-level communication system can provide cloud computing services for the bottom-level terminals, and the satellites have stronger computing power and communication capabilities, which are suitable for handling heavy-duty computing tasks and long-distance communication.

Specifically, in one embodiment, in order to further improve the reliability and flexibility of the communication system, the middle-level communication system is used to collect the location information and signal power of each bottom-level terminal; The geographic location and signal gain of the device.

Among them, the geographical location of the low-altitude equipment specifically refers to the geodetic coordinates (longitude, latitude, and altitude) of the low-altitude equipment, which mainly adjusts the spatial distance between the low-altitude equipment and the bottom terminal.

Specifically, in the case of fast-moving bottom-level terminals, large disaster area coverage and many mountainous areas, each low-altitude device in the middle-level communication system can collect the location information and signal power of all bottom-level terminals in the disaster area, and then the collected location information and signal power are uniformly sent to the mid-level communication system dispatching center, and the dispatching center adjusts the geographical location and signal gain of each low-altitude device according to the obtained bottom-level terminal location information and signal power, so as to adaptively adjust the topology of the mid-level communication system and ensure This ensures the stability of the two-way communication between each low-altitude device and the corresponding bottom terminal.

Among them, the bottom terminal and the middle communication system are constructed based on the mobile ad hoc network.

It should be noted that mobile ad-hoc network (Ad Hoc) is a general term for infrastructure-free mobile networks. In such networks, there is no need for wireless access points (APs) in wireless local area networks (WLANs), and there are no cellular mobile networks. The cellular base stations in (3G/4G/5G) only rely on the ability of each wireless terminal to send and receive wireless signals to directly connect with nearby neighbor wireless terminals (bottom terminals or low-altitude devices), forming a network with at least two The local area network of wireless terminals; each wireless terminal undertakes the functions of bit stream transmission at the physical layer, frame transmission between adjacent nodes at the data link layer, and node selection for forwarding data packets at the network layer, which were originally undertaken by the wireless infrastructure. They are all part of the wireless infrastructure and jointly provide network services for themselves and each other, adding a certain amount of storage and computing overhead to each wireless terminal. Ad Hoc is the only way for each wireless terminal to quickly restore temporary and basic external communication capabilities. Distributed is the basic feature of Ad Hoc. In order to improve the performance of the whole mobile ad hoc network as much as possible, all nodes need to contribute their own extra storage and computing resources to participate in the function realization of Ad Hoc network.

Among them, the middle-level communication system completes the networking of the distributed mobile ad-hoc network immediately after the disaster occurs, its topology is relatively stable, its routing capability is relatively strong, and it has a certain mobility to adapt to the movement and power changes of each bottom terminal at any time. And this mobility will not have too much impact on the stability of the topology, and it has stronger data processing capabilities.

Specifically, in one embodiment, the underlying terminal also generates an edge computing task, and judges whether the remaining local computing resources satisfy the edge computing task. If the local remaining computing resources meet the edge computing task, execute the edge computing task. If the edge computing task cannot be satisfied, the edge computing task will be sent to the middle-level communication system; the low-altitude device in the middle-level communication system receives the edge computing task, obtains the task information of the edge computing task, and judges whether its remaining computing resources meet the edge computing task according to the task information. Computing tasks; if the remaining computing resources of its own can meet the edge computing tasks, the edge computing tasks will be executed.

Specifically, when the remaining local computing resources of the underlying terminal can meet the requirements of the edge computing task, the edge computing task is directly calculated locally without task migration. This not only alleviates the edge computing pressure of the entire communication system, but also reduces the communication load of the communication system.

It should be noted that each low-altitude device and satellite in the middle-level communication system provided by the embodiment of the present application has cloud computing capabilities, that is, the middle-level communication system and satellites form a cloud pool with super large data storage computing and control capabilities.

Among them, the distributed communication system provided by the embodiment of the present application can be applied in normal scenarios, that is, non-disaster area scenarios, and the underlying terminals themselves can communicate based on base stations, etc., and only send communication requests to low-altitude devices when edge computing services are required (It can also be called a task migration request), so that it can establish a communication connection with the low-altitude device, and then complete the task migration work.

Specifically, if the current computing power of the underlying terminal is not enough to complete the current computing task, the computing task will be sent to the low-altitude device as an edge computing task. After receiving the edge computing task, the low-altitude device first obtains the task information of the edge computing task. The task information includes at least the computing resource requirements and the delay threshold, and then judges whether its remaining computing resources can meet the computing resource requirements of the edge computing task. , and predict whether its computing time is within the delay threshold, if its own remaining computing resources can meet the computing resource requirements of the edge computing task, and its predicted computing time is within the delay threshold, then execute the edge computing task. After completing the edge computing task, the calculation result is returned to the underlying terminal.

On the contrary, in one embodiment, if the remaining computing resources of the low-altitude devices do not satisfy the edge computing tasks, the remaining computing resources of other low-altitude devices and the location information of other low-altitude devices are acquired; according to the remaining computing resources of other low-altitude devices and other The location information of the low-altitude device determines the target edge computing low-altitude device; forwards the edge computing task to the target edge computing low-altitude device.

Specifically, the current low-altitude device (the low-altitude device that receives the edge computing task) can obtain the remaining computing resources of other low-altitude devices and the location information of other low-altitude devices through the distributed mobile ad hoc network; according to the remaining computing resources of other low-altitude devices and other Based on the location information of low-altitude devices, it can flexibly schedule and allocate communication tasks directly received by itself, and use the computing power of low-altitude devices in the entire self-organizing network to provide higher-quality communication services and achieve load balancing functions.

Similarly, in one embodiment, if the remaining computing resources of the low-altitude device do not satisfy the edge computing task, the edge computing task is forwarded to the satellite.

Specifically, the edge computing task is handled by the satellite. After the satellite obtains the calculation result, it returns the calculation result to the low-altitude device, and the low-altitude device forwards it to the bottom terminal.

Specifically, in one embodiment, in order to further improve the universality of the communication system, a sensor is attached to the low-altitude device, and the sensor is used to collect disaster information in a preset area. After the low-altitude device obtains the disaster information, it sends the disaster information to Disaster Command Center.

Specifically, the low-altitude equipment can sense the disaster situation on the ground and underground through the sensor. After the sensor collects the disaster information, the low-altitude equipment sends the disaster information to the disaster command center. Among them, when the communication capability of the low-altitude equipment is not enough to send the disaster information to the disaster command center, the low-altitude equipment sends the disaster information to the satellite, and the satellite completes the disaster information upload work.

Specifically, in one embodiment, in order to improve the robustness and invulnerability of the communication system, external communication equipment and/or lightweight intermediate protocols are deployed on satellites and low-altitude equipment, so that satellites and low-altitude equipment can adapt to various letter of agreement.

Specifically, the embodiment of the present application fully takes into account the heterogeneity of the internal devices of each level and the devices between layers, and the communication protocols and communication standards used by different devices are different. Considering that no matter what wireless communication method is adopted, all It uses wireless electromagnetic waves to broadcast information to the outside, but the wireless frequency bands used are different, the encoding methods are different, or the data frame encapsulation formats are different. Therefore, the embodiment of this application proposes two solutions:

One is a hardware solution, which uses a new plug-in communication component/device (external communication device), which has plug-and-play, common interfaces, and standardized and generalized wireless communication interfaces and communication protocols. Various heterogeneous devices can pass through The external communication device completes the conversion and compatibility work of the communication protocol.

The other is a software solution, which presets a new lightweight intermediate protocol that can be automatically activated. The communication signal undergoes the wireless frequency band conversion of the signal, the binary transcoding of the analog signal, and the decapsulation/recapsulation of the binary data frame through this protocol, so that the transformed wireless communication signal is adapted to the wireless communication standard adopted by the destination node, and the information is complete. There is no increase or decrease and can be accurately and completely identified by the destination node.

In the embodiment of this application, the satellite with the highest computing power and the middle-level communication system with the middle computing power but specially pre-deployed for emergency communication and immediate recovery preparations have been pre-installed and support the automatically activated light-weight system provided by the above embodiment. level intermediate protocol, and plug-in the communication components/equipment with communication protocol conversion compatibility provided by the above embodiments, which provides double insurance for the solution of higher-level network heterogeneity, and provides support for those underlying The terminal provides the ability to exclude heterogeneous direct communication, so that satellites and low-altitude equipment can adapt to multiple communication protocols; and for the bottom terminal with the lowest computing power, considering that some bottom terminals cannot support lightweight intermediate protocols, active In the vicinity of the area, there are relatively strong and indestructible external communication components/equipment fixed. For communication tasks that do not need to be delivered to the middle-level communication system, according to the signal presentation form (frequency, modulation method, encoding header format, etc.), and convert the signal to ensure that the receiving end can accurately obtain all the information that the sending end wants to send.

Specifically, in one embodiment, in order to further improve the invulnerability and robustness of the communication system, each low-altitude device in the bottom-level terminal and the middle-level communication system is equipped with an emergency frequency band for transmitting emergency information.

It should be noted that emergency information mainly refers to data packets with high transmission speed requirements, such as alarm information. In addition, the emergency frequency band can also transmit other conventional data packets, and the emergency frequency band has strong anti-interference ability, which is conducive to ensuring the communication effect.

Exemplarily, each low-altitude device in the bottom-level terminal and the middle-level communication system needs to reserve certain computing and storage resources, and certain frequency spectrum resources also need to be reserved between each cross-level device to form an emergency frequency band for communication at its own level. In addition to edge computing, route discovery and data packet forwarding, for computing and routing functions that cannot be fully satisfied (overload or over-distance), use this part of resources (emergency frequency band) for two-way communication between cross-level task uploading/result response . In addition, a small amount of resources should be reserved between devices at all levels of the system for maneuvering, in response to sudden abnormalities (faults, damages, etc.) This part of resources can be used to fill, enhance the robustness of the system, and ensure that the system can still meet all communication requirements without overloading.

Exemplarily, as shown in FIG. 2, it is a schematic structural diagram of an exemplary distributed communication system provided by the embodiment of the present application. Two dotted lines without arrows connected to the same device in the figure indicate the communication range corresponding to the device. The dotted line with arrows indicates the moving direction of the device, and the double arrows with solid lines indicate that two-way communication can be carried out between the two. Among them, in the case that the bottom terminal does not need to use the middle communication system to realize the communication function, each low-altitude device in the bottom terminal can also be used as an auxiliary AP/base station for ordinary wireless communication to reinforce the function of the original base station. After a disaster occurs, through the "double insurance" of self-perception and control signaling issued by the artificial control center (disaster command center) via satellite and/or mid-level communication system, within the shortest time after the ground/underground disaster occurs, Immediately put it into the bottom terminal to ensure the seamless connection of communication function recovery and provide uninterrupted communication services for users in disaster areas.

Among them, the middle-level communication system can provide cloud computing services for the bottom-level terminals, and act as a small cloud pool to coordinate the local computing and storage resources of each temporary AP and the application of wireless spectrum resources between devices, avoiding the uneven workload distribution of each temporary AP. In this way, it is ensured that the network service capabilities provided by the bottom terminals in disaster areas of various densities are similar, and that various resources in the mid-level communication system are utilized to the greatest extent.

As shown in Figure 2, the distributed communication system provided by the embodiment of the present application constitutes a "spatial lattice" architecture, and the entire network structure can be compared to the structure of a molecular crystal. From the point of view of the microstructure, the mutual communication connection between the high-altitude layer, the low-altitude layer and the ground layer can be compared to the intermolecular force, and the mutual communication between the same layers can be compared to the intra-molecular force. key levels of array architecture. The microstructure appears as a cross-level distribution in three-dimensional space in the macroscopic view. The spatial lattice architecture can be decomposed into horizontally parallel isomorphic lattices and vertically staggered heterogeneous lattices, among which, based on the low-altitude layer, three characteristics of the entire spatial lattice network architecture are supported: orderliness, self- Canonical (self-limiting) and anisotropy.

In terms of microstructure, (1) Long-range order means that within the scope of a single crystal, the ordered distribution of particles extends to the entire lattice. In this architecture, the ground layer is originally distributed in disorder, but through the subsequent deployment of the low-altitude layer, for example, it is densely distributed in places with high terminal density at the bottom layer and sparsely distributed in places with low terminal density at the bottom layer, showing such an orderly and regularity. In this feature, the irreplaceability of the low-altitude layer lies in: the aircraft (low-altitude equipment) carries not only communication At the same time, it will control the movement of the aircraft (the role of the sensor) according to the traffic volume at the ground level, and realize the orderly deployment of the regularity (according to the traffic volume, the number of terminals, and the strength of the signal, etc.). However, conventional communication equipment only carries communication tasks, and the deployment of aircraft requires human control. (2) Self-regulating (self-limiting) means that the crystal has a tendency to spontaneously form a closed geometric polyhedron shape, and thus close (range) itself. In this architecture, the low-altitude layer is used as the link between the ground and the satellite. It connects several earth satellites upwards to form the upper side of the crystal structure, and connects each ground terminal downwards. It covers the entire closed area and forms the lower side of the crystal structure. The external performance is self-limiting. In this feature, the irreplaceability of the low-altitude layer lies in: according to the natural environment and radio wave environment, it can spontaneously form a network with other equipment and form a regular network structure. In order to present a regular and orderly structure, the aircraft equipment needs to be considered Wireless mobile networking in three-dimensional space, such as the problem of exposed terminals and hidden terminals in three-dimensional space. However, conventional communication equipment only considers the problem of mobile networking in plane space, and it will no longer be applicable when it rises to the spatial level; (3) Anisotropy refers to the change of all or part of the chemical and physical properties of a substance as the direction changes. Variations take on different properties in different directions. In this framework, it is shown that the business volume, modulation mode, and communication protocol between layers are different. In this feature, the traffic volume from the ground layer to the middle layer is the largest, and there are the most types of communication methods and communication protocols. The irreplaceability of the low-altitude layer lies in that the low-altitude layer carries all ground services and adapts to all communication methods and protocols at the same time. Communication protocol, but the amount of traffic forwarded to the satellite level is relatively small (only unprocessable business is forwarded upwards), and it is modulated into a unified communication mode through protocol conversion.

In terms of macro implementation, through the wireless hardware bridge device (such as software-defined radio unit) pre-assembled on the low-altitude equipment and supporting application protocol conversion logic and networking algorithm, on-demand flexible service capabilities are provided for the underlying equipment. In the low-altitude airspace at a certain height from the ground, the three-dimensional space flexibility, obstacle avoidance ability and space adaptive wireless communication ability brought by the height difference are used to realize flexible topology networking and load balancing. The non-substitutability of equipment used for low-altitude formation includes at least: (1) From the analysis of the working mode, the working mode of ordinary APs is fixed, and the parameters of the physical layer and data link layer (such as frequency spectrum, modulation mode, etc.) are fixed; (2) ) From the analysis of wireless signal characteristics, ordinary APs are designed for static applications. If they are installed on high-speed aircraft, Doppler frequency shift will definitely affect the original wireless signal performance. In addition, ordinary AP wireless signal It is difficult to penetrate the metal casing of similar aircraft equipment, and it is easy to cause spectrum interference between ordinary APs and the original communication equipment of the aircraft (for example, it is well known that personal wireless devices must be turned on or turned off when flying in a civil airliner). machine), will greatly weaken the low-level service capabilities involved in the embodiment of this application; (3) From the analysis of networking functions, ordinary APs are usually a gateway device connected to the Internet, and in most cases only support star topology. Even the new APs that support mesh topology are only small-scale and do not support inter-network mobility. According to the above analysis, the low-altitude layer formation equipment involved in the embodiment of the present application cannot be realized by simply adopting the common AP on the flight equipment. Exemplarily, as shown in FIG. 3 , it is a schematic structural diagram of an exemplary mid-level communication system provided by the embodiment of the present application. The heterogeneous devices specifically refer to low-altitude devices, that is, the low-altitude devices can communicate with each other.

Among them, the bottom terminal can always maintain two-way communication with a node (heterogeneous device) in the middle communication system in the process of moving. Figure 4 is a schematic diagram of the service coverage of an exemplary middle-level communication system provided by the embodiment of the present application. After the bottom-level terminal leaves the service range of the heterogeneous device 2 (low-altitude device 2), it will immediately arrive at the heterogeneous device 3 (low-altitude device 3). 1. In one of the service ranges of heterogeneous device 4 (low-altitude device 4) and heterogeneous device 5 (low-altitude device 5), and the service ranges of each device overlap with each other, so that when each underlying terminal moves to the overlapping area, it will be replaced When serving nodes in the middle layer, the heterogeneous devices involved in the overlapping area can fully share the current data packet sending status (sequence number of the data packet being transmitted), destination routing and node identity of each bottom terminal in the overlapping area, so as to ensure The continuity of communication of ground equipment during long-distance movement, and the quality of network service is basically unchanged (network service resources are coordinated by the mobile ad hoc network of the middle-level communication system). In addition, after the bottom terminal in the overlapping area uploads the specific requirements (delay and reliability, etc.) According to these requirements, regional co-ordination is carried out, and a most suitable heterogeneous device that directly provides services is allocated to the bottom terminal for two-way communication, so as to improve the overall performance and personalized service capabilities of the middle-level communication system.

Exemplarily, when the low-altitude device 1 is moving, the low-altitude device 1 discovers a bottom-level terminal 6 capable of two-way communication at the same level, thereby establishing a minimum mobile ad hoc network at the bottom-level terminal level, which has the smallest edge computing capabilities. At the same time, the bottom terminal 6 is also adjacent to the bottom terminal 7, but the distance is slightly farther away, so the lower power low-altitude device 1 has not found the bottom terminal 7, but the bottom terminal 7 can discover the low-altitude device 1 in one direction at the same level ; but according to the system design, the low-altitude device 1 and the bottom-level terminal 7 must be able to conduct two-way communication through the middle-level communication system. Neighborhood conditions and geographic locations between bottom terminals 7 are for low-altitude devices 1 to choose to move closer to bottom terminals 7 (in order to ensure that the location and topology of the ad hoc LAN at the bottom terminal level are relatively stable, it is generally required that low-power bottom terminals The lower-level terminal with higher power moves closer), until it can directly communicate with the lower-level terminal 7 in two directions, and the low-altitude device 1 obtains information prompts, thereby reducing the network burden of the middle-level communication system. If the geographical location of the low-altitude device 1 is too harsh, the bottom terminal 7 moves closer to the low-altitude device 1 .

Exemplarily, if the wireless frequency bands of the underlying terminal 1, the underlying terminal 6, and the underlying terminal 7 are all different, and the lightweight intermediate protocol is not installed on the underlying terminal 1, it can communicate with the underlying terminal 6/bottom terminal 7 through a pre-deployed External communication equipment performs signal frequency conversion and data link layer frame reassembly and shielding, or in the case of failure of external communication equipment, realizes relatively reliable two-way communication functions through low-altitude equipment that has pre-deployed lightweight intermediate protocols; while the underlying terminal 6 and the underlying terminal 7 are pre-installed with lightweight intermediate protocols, and the communication between them is directly resolved at the ground level, and they can jointly build a distributed mobile ad hoc network at the same ground level. Exemplarily, as shown in FIG. 5 , it is a schematic structural diagram of another exemplary distributed communication system provided by the embodiment of the present application. The distributed communication system provided by the embodiment of the present application can realize wireless communication on a global scale. Among them, the ground-level mobile ad-hoc network has a higher node density and a larger number of nodes, and its edge computing capability is stronger, and at the same time, it generates a larger amount of communication tasks. Therefore, due to the threshold condition of resource reservation, the ground-level mobile ad hoc network submits computing tasks that exceed the upper limit of edge computing or communication distance capabilities to the middle-level communication system, and the middle-level communication system also submits computing tasks that exceed the capacity to High-altitude level (satellite), to ensure that the largest communication tasks in the communication system can also be realized reliably and efficiently.

The distributed communication system provided by the embodiment of the present application includes: a bottom-level terminal, a middle-level communication system, and a satellite; wherein, the middle-level communication system includes a plurality of low-altitude devices with wireless communication capabilities; Request, establish a communication connection with the underlying terminal to provide communication services for the underlying terminal; when the low-altitude equipment cannot meet the communication needs of the underlying terminal, forward the communication task of the underlying terminal to the satellite; the satellite receives and processes the communication task forwarded by the low-altitude equipment. The system provided by the above scheme provides communication services for bottom terminals by using multiple low-altitude devices in the middle-level communication system, which improves the communication efficiency of the system, and the deployment of low-altitude devices is convenient, which improves the flexibility of the system. Moreover, it has good invulnerability and robustness.

An embodiment of the present application provides a control method for a distributed communication system, which is applied to a distributed communication system. The distributed communication system includes bottom-level terminals, middle-level communication systems, and satellites; wherein, the middle-level communication system includes multiple Low altitude equipment. The execution subject of the control method provided in the embodiment of the present application is an electronic device, such as a server, a desktop computer, a notebook computer, a tablet computer and other electronic devices that can be used to control a distributed communication system.

As shown in FIG. 6 , it is a schematic flowchart of a control method for a distributed communication system provided in an embodiment of the present application. The method includes:

Step 601, controlling the low-altitude device to collect a communication request sent by the bottom terminal, and establishing a communication connection with the bottom terminal according to the communication request, so as to provide communication services for the bottom terminal;

Step 602, when the low-altitude device cannot meet the communication requirements of the bottom terminal, control the low-altitude device to forward the communication task of the bottom terminal to the satellite;

Step 603, controlling the satellite to receive and process the communication task forwarded by the low-altitude equipment.

Specifically, in one embodiment, the method also includes:

Control the middle-level communication system to collect the location information and signal power of each bottom terminal; adjust the geographical location and signal gain of the low-altitude equipment according to the location information and signal power of each bottom terminal.

Specifically, in one embodiment, the method also includes:

Control the underlying terminal to also generate edge computing tasks, and judge whether the local remaining computing resources meet the edge computing tasks; if the local remaining computing resources meet the edge computing tasks, control the underlying terminals to perform edge computing tasks; if the local remaining computing resources cannot meet the edge computing tasks , then control the underlying terminal to send edge computing tasks to the middle-level communication system;

Control the low-altitude devices in the middle-level communication system to receive edge computing tasks, obtain the task information of the edge computing tasks, and judge whether their remaining computing resources meet the edge computing tasks according to the task information; if their own remaining computing resources meet the edge computing tasks, control the low-altitude devices Perform edge computing tasks.

Specifically, in one embodiment, the method also includes:

If the remaining computing resources of the low-altitude device do not meet the edge computing tasks, the low-altitude device is controlled to obtain the remaining computing resources of other low-altitude devices and the location information of other low-altitude devices;

Determine the target edge computing low-altitude device according to the remaining computing resources of other low-altitude devices and the location information of other low-altitude devices;

Forward edge computing tasks to target edge computing low-altitude devices.

Specifically, in one embodiment, the method also includes:

If the remaining computing resources of the low-altitude device do not satisfy the edge computing task, the low-altitude device is controlled to forward the edge computing task to the satellite.

Specifically, in one embodiment, a sensor is attached to the low-altitude equipment, and the method also includes:

Control sensors to collect disaster information in preset areas;

After receiving the disaster information, the control low-altitude equipment sends the disaster information to the disaster command center.

Regarding the control method of the distributed communication system in this embodiment, the specific manner of each step has been described in detail in the embodiment of the distributed communication system, and will not be described in detail here.

The control method of the distributed communication system provided by the embodiment of the present application is used to control the distributed communication system provided by the above embodiment, and its implementation method is the same as the principle, so it will not be repeated here.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present application. scope.