A low-altitude airspace dedicated communication network

Abstract

This invention discloses a dedicated communication network for low-altitude airspace, relating to the field of communication technology. It includes a core layer, an access layer, and a terminal layer. The core layer deploys a regional control server, a data forwarding center, and a network management platform, undertaking the responsibilities of global communication resource scheduling, data processing, and network monitoring. The access layer consists of low-altitude communication base stations and high-altitude relay nodes, forming a three-dimensional signal coverage for low-altitude airspace. The terminal layer is a communication module integrated into low-altitude aircraft, establishing communication links with the access layer. The core layer, access layer, and terminal layer work collaboratively through multi-band fusion transmission, dynamic anti-interference, and intelligent resource scheduling technologies to ensure stable transmission of air-to-ground information. This invention solves the technical problems of insufficient coverage, poor transmission stability, and inefficient resource scheduling in existing communication networks in low-altitude airspace scenarios. It is also adapted to low-altitude airspace flight scenarios, improving communication coverage and transmission reliability, and meeting the business needs of low-altitude traffic control, operational collaboration, and other related tasks.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and more specifically to a dedicated communication network for low-altitude airspace. Background Technology

[0002] Currently, with the rapid development of the low-altitude economy, low-altitude aircraft (such as drones and general aviation aircraft) are increasingly widely used in logistics transportation, emergency rescue, and aerial operations, making the demand for low-altitude airspace communication increasingly urgent. Existing communication networks are mainly based on the extension coverage of terrestrial public communication systems (such as 5G and 4G), which has the following technical shortcomings: First, limited coverage; ground base station signals have blind spots in low-altitude areas, especially in remote areas and complex terrain, making continuous coverage impossible. Second, poor transmission stability; low-altitude aircraft are highly maneuverable and easily affected by terrain obstruction, electromagnetic interference, and multipath effects, leading to frequent communication link interruptions. Third, inefficient resource scheduling; existing networks have not optimized resource allocation strategies for low-altitude flight scenarios, making it difficult to meet the differentiated needs of different services (such as emergency communication and high-definition mapping). Fourth, insufficient control capabilities; the lack of a dedicated regional communication control mechanism makes it impossible to effectively supervise the communication behavior of low-altitude aircraft.

[0003] Therefore, there is an urgent need to build a dedicated communication network adapted to low-altitude airspace scenarios to improve communication coverage, stability, and control capabilities. Summary of the Invention

[0004] In view of this, the present invention provides a dedicated communication network for low-altitude airspace to solve the problems existing in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A dedicated communication network for low-altitude airspace includes a core layer, an access layer, and a terminal layer. The core layer deploys an area control server, a data forwarding center, and a network management platform for global communication resource scheduling, data processing, and network monitoring. The access layer includes low-altitude communication base stations and high-altitude relay nodes to form three-dimensional signal coverage for low-altitude airspace. The terminal layer consists of communication modules integrated into low-altitude aircraft for establishing communication links with the access layer. The core layer, access layer, and terminal layer achieve stable transmission of air-to-ground information through multi-band fusion transmission, dynamic anti-interference, and intelligent resource scheduling technologies.

[0006] Optionally, the resource scheduling process of the regional control server includes: The system collects terminal layer data on aircraft position, speed, service type, communication bandwidth requirements, and BeiDou positioning; it also collects access layer data on base station load, relay node link quality, 4G WiFi coverage strength, and satellite link latency; it collects operator network spectrum occupancy and load data; and it calculates scheduling parameters based on the above data. A resource scheduling matrix is ​​constructed based on scheduling parameters, and a genetic algorithm is used to solve for the optimal resource allocation scheme, which includes frequency band allocation, link selection, and power adjustment parameters. The optimal resource allocation plan is distributed to the access layer and terminal layer, the execution effect is tracked in real time, and the plan is dynamically updated according to changes in the flight situation.

[0007] Optionally, the data forwarding center adopts a layered forwarding architecture, including edge forwarding nodes and core forwarding nodes. Edge forwarding nodes are deployed at the interface between the access layer and the core layer, used for preprocessing and local caching of data uploaded from the access layer. Core forwarding nodes are deployed within the core layer, used for cross-regional data interaction and connection with terrestrial public communication networks. Optionally, the multi-band fusion transmission technology employs UHF, L / S, and C bands working collaboratively. The UHF band is used for initial link establishment and emergency communication between the terminal layer and the access layer, the L / S band is used for regular service data transmission, and the C band is used for high-bandwidth service transmission. Seamless switching between bands is achieved through a band switching module, with switching triggering conditions including link quality thresholds, service bandwidth requirements, and interference intensity.

[0008] Optionally, the dynamic anti-interference technology includes: The low-altitude communication base station and high-altitude relay node of the access layer have built-in interference detection units, and use the energy detection method to detect interference signals in real time. The core layer network management platform generates anti-interference strategies based on interference detection results, using adaptive frequency hopping and beamforming technologies, and distributes them to the access layer and terminal layer. The terminal layer's communication module performs frequency hopping avoidance or signal enhancement processing through an anti-interference processing unit, while the access layer suppresses interference signals by adjusting the beam direction. Optionally, it also includes constructing a relay communication network based on high-altitude relay nodes, specifically: Monitor high-altitude relay nodes in low-altitude airspace; The spatial location of each high-altitude relay node is calculated individually to obtain the spatial coordinates of each relay node. Spatial distribution analysis is performed on the spatial location coordinates of each relay node to generate spatial distribution data of the relay nodes; The topological connection evolution between relay nodes is performed on the spatial distribution data of relay nodes to obtain the topological logic of relay nodes; Based on the relay node topology logic, a distributed relay topology fitting is performed on the high-altitude relay nodes to construct a relay communication network.

[0009] Optionally, the intelligent resource scheduling of the regional control server is solved using an objective optimization function, the expression of which is:

[0010] Where: F is the resource scheduling evaluation coefficient, and α, β, and γ are weighting coefficients; Let be the actual bandwidth of the i-th link. The maximum bandwidth of the i-th link; Let J be the link signal-to-noise ratio of the j-th communication node. The maximum signal-to-noise ratio threshold for the j-th node; Let K be the interference intensity of the k-th frequency band. This represents the maximum permissible interference intensity for the k-th frequency band.

[0011] Optionally, the coverage radius of the low-altitude communication base station in the access layer satisfies the formula:

[0012] Where: R is the coverage radius of the base station; This refers to the base station's transmit power. For the base station transmit antenna gain; λ is the terminal receiving antenna gain; λ is the communication carrier wavelength; L is the total link loss; This is the minimum received power for the terminal.

[0013] As can be seen from the above technical solution, compared with the prior art, this invention discloses a dedicated communication network for low-altitude airspace, including a core layer, an access layer, and a terminal layer. The core layer deploys a regional control server, a data forwarding center, and a network management platform, undertaking the responsibilities of global communication resource scheduling, data processing, and network monitoring. The access layer consists of low-altitude communication base stations and high-altitude relay nodes, forming a three-dimensional signal coverage for low-altitude airspace. The terminal layer is a communication module integrated into low-altitude aircraft, realizing the establishment of communication links with the access layer. The core layer, access layer, and terminal layer work together through multi-band fusion transmission, dynamic anti-interference, and intelligent resource scheduling technologies to ensure stable transmission of air-to-ground information. This invention solves the technical problems of insufficient coverage, poor transmission stability, and inefficient resource scheduling in existing communication networks in low-altitude airspace scenarios, and is adapted to low-altitude airspace flight scenarios, improving communication coverage and transmission reliability, and meeting the business needs of low-altitude traffic control, operational collaboration, and other tasks. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the system structure provided by the present invention. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] This invention discloses a dedicated communication network for low-altitude airspace, such as... Figure 1 As shown, it includes a core layer, an access layer, and a terminal layer. The core layer deploys a regional control server, a data forwarding center, and a network management platform for global communication resource scheduling, data processing, and network monitoring. The access layer includes low-altitude communication base stations and high-altitude relay nodes to form three-dimensional signal coverage in the low-altitude airspace. The terminal layer is a communication module integrated into the low-altitude aircraft to establish a communication link with the access layer. The core layer, access layer, and terminal layer achieve stable transmission of air-to-ground information through multi-band fusion transmission, dynamic anti-interference, and intelligent resource scheduling technologies.

[0018] Specifically, the core layer, as the central hub of the network, deploys regional control servers, a data forwarding center, and a network management platform. The core function of the regional control server is to perform global communication resource scheduling based on low-altitude airspace flight situation data. The specific process is as follows: It collects terminal layer data on aircraft position, speed, service type, communication bandwidth requirements, and BeiDou positioning; it collects access layer data on base station load, relay node link quality, 4G WiFi coverage strength, and satellite link latency; and it collects operator network spectrum occupancy data (including the idle percentage of each frequency band and spectrum usage priority) and load data (including core network load rate and cell access capacity). After standardizing all the above data, it calculates and generates service requirement parameters, network status parameters, and operator collaboration parameters (frequency band availability, network...). (Bearing capacity factor); A multi-dimensional resource scheduling matrix is ​​constructed based on three types of parameters, with operator coordination parameters integrated as independent column dimensions into the matrix, directly related to frequency band allocation and link selection decisions; Using the objective optimization function as the fitness function, the operator coordination parameters are incorporated into the genetic algorithm constraints to solve for the optimal solution, which includes dedicated / operator-shared frequency band allocation, dedicated / hybrid link selection, and power adjustment parameters; After the solution is issued, its execution effect is tracked in real time, and the dynamic status of the operator's network is monitored synchronously. When the proportion of idle frequency bands of the operator drops below 30% or the bearing capacity factor rises above 90%, a partial update of the solution is triggered to ensure that resource allocation and operator network status are adapted in real time. The genetic algorithm can use existing algorithms.

[0019] The data forwarding center adopts a layered forwarding architecture, including edge forwarding nodes and core forwarding nodes. Edge forwarding nodes are deployed at the interface between the access layer and the core layer to preprocess (deduplication, compression) and cache data uploaded from the access layer locally, reducing the data processing pressure on the core layer. Core forwarding nodes are deployed within the core layer to enable cross-regional data interaction and interface with terrestrial public communication networks (such as government networks and the Internet), ensuring cross-domain data transmission. The network management platform uses SNMP (Simple Network Management Protocol) to collect real-time operating status parameters (such as device temperature, power supply voltage, and link bandwidth) of the core layer, access layer, and terminal layer, builds a visual monitoring interface, and realizes network fault diagnosis (based on fault tree analysis), performance monitoring (latency and bandwidth utilization statistics), and configuration management (remote device parameter modification). When a fault is detected, an alarm is automatically triggered and pushed to the operation and maintenance terminal.

[0020] Optionally, it may also include an operator collaboration module: adopting an embedded architecture, integrating the S1 interface protocol stack and spectrum detection unit. It collects operator network data (spectrum occupancy rate, cell load) in real time; when the dedicated network load is >80%, it requests to share the operator's idle spectrum (20-50MHz); when the dedicated node fails, it triggers the operator's network takeover, with a takeover latency of <100ms; and it pushes fault information to the operator to achieve joint operation and maintenance.

[0021] The access layer, serving as the signal coverage carrier of the network, includes low-altitude communication base stations and high-altitude relay nodes, which work together to form a three-dimensional signal coverage in the low-altitude airspace. Low-altitude communication base stations employ a micro base station architecture, deployed along flight paths, operational areas, and around take-off and landing points in the low-altitude airspace. Their transmission power is controlled at 5-10W, with a coverage radius of 1-3 kilometers, used to achieve signal coverage in short-range low-altitude areas (0-1000 meters altitude). They utilize a combination of omnidirectional and directional antennas, with the directional antenna pointing towards the flight path to enhance signal strength in the flight path area. High-altitude relay nodes are deployed on stratospheric aerostats (18-25 km altitude) or high-altitude UAVs (3-5 km altitude). Stratospheric aerostats are equipped with phased array antennas, with a coverage radius of 50-100 kilometers, used to achieve wide-area coverage in long-range low-altitude areas (0-3000 meters altitude). High-altitude UAVs, acting as supplementary relays, are deployed in signal blind spots with complex terrain (such as mountains and valleys), achieving complementary coverage through cluster collaboration. The high-altitude relay node adopts a power supply method that combines solar power and battery energy storage. It has a built-in attitude adjustment module and uses GPS / BeiDou satellite positioning to achieve stable position control, ensuring the continuity of signal coverage. It also has autonomous fault repair capabilities. When a relay node fails, adjacent nodes automatically adjust their beams to cover the faulty area.

[0022] Specifically, it can also include BeiDou ground orbit satellite relay nodes and 4G WiFi auxiliary coverage units; the BeiDou ground orbit satellite relay nodes use dedicated communication satellites in the BeiDou-3 satellite constellation to provide communication relay in remote areas and across regions; they can use BeiDou-3 MEO satellites, employing on-board processing and forwarding technology, to connect with high-altitude relay nodes via interplanetary links, automatically switching to satellite links when the spacecraft flies to ground or high-altitude coverage blind spots; as an emergency backup link, it ensures communication continuity when the ground network fails.

[0023] The 4G WiFi auxiliary unit can use an industrial-grade WiFi 6 module, transmit data back to the low-altitude base station via fiber optic cable, be deployed in the base station blind zone, and support seamless handover with the base station.

[0024] The terminal layer, serving as the user access point of the network, is a communication module integrated into low-altitude aircraft. It features a miniaturized, low-power design, adaptable to various types of low-altitude aircraft (drones, helicopters, general aviation aircraft, etc.). The communication module incorporates a multi-band transceiver unit and an anti-interference processing unit. The multi-band transceiver unit supports collaborative operation of UHF, L, S, and C bands. The UHF band (300MHz-3GHz) is used for initial link establishment and emergency communication between the terminal layer and the access layer. This band has strong diffraction capabilities, making it suitable for complex terrain scenarios. The L / S band (1-4GHz) is used for regular service data transmission, balancing bandwidth and anti-interference performance. The C band (4-8GHz) is used for high-bandwidth services such as high-definition video and 3D mapping, providing transmission rates exceeding 100Mbps. Seamless switching between bands is achieved through a band switching module. Switching trigger conditions include link quality threshold (signal-to-noise ratio below 15dB), service bandwidth requirements (exceeding 50Mbps triggers C band switching), and interference strength (interference signal strength exceeding -80dBm triggers frequency hopping switching). The anti-interference processing unit receives anti-interference strategies from the core layer and performs frequency hopping avoidance or signal enhancement processing to ensure the stability of the communication link. In addition, the communication module also integrates a positioning module (GPS / BeiDou dual-mode) and a status monitoring module. The positioning module is used to collect the real-time location information of the aircraft and upload it to the core layer to provide a basis for resource scheduling; the status monitoring module is used to collect the operating voltage, temperature and link quality data of the communication module, and promptly uploads fault warning information when the parameters exceed the threshold.

[0025] In one specific embodiment, the dynamic anti-interference technology includes: The low-altitude communication base station and high-altitude relay node of the access layer have built-in interference detection units, and use the energy detection method to detect interference signals in real time. The detection formula is:

[0026] Where: T is the detection statistic, and N is the number of sampling points (value 1024).x ( n The amplitude of the received signal at the nth sampling point is T; when T > T0 (T0 is the detection threshold, determined by noise power and false alarm probability), interference is determined to exist; the detection threshold T0 = N0 × Q - ¹(1-Pfa), where N0 is the noise power spectral density, Q - ¹ is the inverse function of the complementary error function. For example, when N0 = -174dBm / Hz, T0 ≈ -143dBm.

[0027] The core layer network management platform generates anti-interference strategies based on interference detection results, using adaptive frequency hopping and beamforming technologies, and distributes them to the access layer and terminal layer. The terminal layer's communication module performs frequency hopping avoidance or signal enhancement processing through an anti-interference processing unit, while the access layer suppresses interference signals by adjusting the beam direction. In a specific embodiment, it further includes constructing a relay communication network based on high-altitude relay nodes, specifically: Monitor high-altitude relay nodes in low-altitude airspace; The spatial location of each high-altitude relay node is calculated individually to obtain the spatial coordinates of each relay node. Spatial distribution analysis is performed on the spatial location coordinates of each relay node to generate spatial distribution data of the relay nodes; The topological connection evolution between relay nodes is performed on the spatial distribution data of relay nodes to obtain the topological logic of relay nodes; Based on the relay node topology logic, a distributed relay topology fitting is performed on the high-altitude relay nodes to construct a relay communication network.

[0028] Specifically, in this embodiment, monitoring equipment, such as ground base stations, sensor networks, or mobile monitoring platforms, is deployed in low-altitude airspace to collect data from high-altitude relay nodes in real time. Appropriate equipment types and technologies (such as RF monitoring, GPS positioning, and UAV-borne sensors) are selected to ensure signal capture from relay nodes. A data acquisition strategy is implemented to periodically or in real-time monitor the status of high-altitude relay nodes, including signal strength, communication quality, and node activity. The collected data is transmitted to a central database via a wireless network for subsequent analysis. The monitoring equipment is integrated with a data processing system to ensure automated data processing and storage. An alarm mechanism is set to monitor node faults or abnormal states in real time, ensuring the reliability of the communication link. Suitable... Positioning methods, such as GPS positioning, triangulation, signal strength indication, or multi-point positioning algorithms (e.g., TOA, TDOA), are employed. Environmental factors, such as the impact of buildings and trees on signal propagation, are considered. Appropriate technologies and algorithms are selected, and the spatial positions of each high-altitude relay node are calculated using deployed positioning equipment. Based on monitoring data, the three-dimensional coordinates (X, Y, Z) of each relay node are calculated. The positioning results are recorded in a database, forming a spatial position dataset of the relay nodes. The positioning results are verified to ensure the accuracy and reliability of the calculations. This can be achieved by cross-validating the results of different positioning algorithms or comparing them with known coordinates. The spatial position coordinate data of each relay node is then organized into a structured dataset, ensuring consistent data format. First, it is easy to analyze. Spatial analysis tools (such as GIS software, Python's Geopandas, Matplotlib) can be used to analyze the spatial location of relay nodes. Cluster analysis (such as K-means, DBSCAN) or spatial distribution models (such as Voronoi diagrams) can be used to analyze the distribution of relay nodes, identify node clustering areas and coverage areas, visualize the analysis results, and generate spatial distribution maps of relay nodes. This helps to identify effective communication coverage areas and potential blind spots, define connection rules between relay nodes, such as determining connection relationships based on factors like signal strength, distance between nodes, or network quality, and determine the topology type, such as star, ring, or mesh, to adapt to different communication needs. The task is to implement a topology connection evolution algorithm to generate the topology logic of relay nodes based on spatially distributed data. Using graph theory methods or network optimization algorithms (such as the minimum spanning tree algorithm), the connection state and neighboring node information of each node are recorded to form a topology dataset of relay nodes. The generated topology structure is verified to ensure it supports efficient communication links. Necessary adjustments and optimizations are made based on actual network performance and data transmission requirements. Suitable topology fitting methods, such as distributed algorithms, simulated annealing, and genetic algorithms, are selected to optimize the connection methods of relay nodes and network performance. Based on the generated relay node topology logic, a distributed relay topology is constructed to ensure that each node can operate independently in the network and communicate effectively with other nodes.By leveraging Software-Defined Networking (SDN) technology, the connection strategies of relay nodes are dynamically adjusted to cope with network changes and load adjustments. The performance of the constructed relay communication network is evaluated, including metrics such as latency, bandwidth, and connection stability. Network simulation tools (such as NS-3 and OMNeT++) are used for simulation analysis, and necessary optimizations are made based on the evaluation results to ensure the efficiency and stability of the low-altitude relay communication network.

[0029] In one specific embodiment, the intelligent resource scheduling of the regional control server is solved using an objective optimization function, the expression of which is:

[0030] Where: F is the resource scheduling evaluation coefficient, α, β, γ are weight coefficients, α+β+γ=1, which correspond to the weights of bandwidth utilization, link stability and anti-interference capability, respectively. Let be the actual bandwidth of the i-th link. The maximum bandwidth of the i-th link; Let J be the link signal-to-noise ratio of the j-th communication node. The maximum signal-to-noise ratio threshold for the j-th node; Let K be the interference intensity of the k-th frequency band. This represents the maximum permissible interference intensity for the k-th frequency band.

[0031] In a specific embodiment, the coverage radius of the low-altitude communication base station in the access layer satisfies the formula:

[0032] Where R is the coverage radius of the base station (unit: m); Base station transmit power (unit: W, value range: 5-20W); The base station transmit antenna gain (unit: dBi, value range: 12-18 dBi). λ is the terminal receiving antenna gain (unit: dBi, range: 5-10 dBi); λ is the communication carrier wavelength (unit: m, determined by the operating frequency band f, λ=c / f, c is the speed of light 3×10^8 m / s); L is the total link loss (unit: dB, including path loss, shadow fading and feeder loss, range: 80-120 dB). Minimum received power for the terminal (unit: W, value range 1×10⁻⁶) -12 -1×10 -10 W).

[0033] The following specific example further illustrates the network of the present invention.

[0034] 1. Core Layer Deployment: The provincial core data center deploys 2 regional control servers, 4 data forwarding centers, 1 network management platform, and 2 operator collaboration modules, respectively connecting to China Mobile and China Unicom. The regional control servers collect data from 800 aircraft, updating the scheduling plan every 50ms, with an average objective function F value ≥ 0.85; the data forwarding centers connect to the operator's core network, with cross-regional data forwarding latency ≤ 18ms; the network management platform monitors 1200 nodes, with a fault diagnosis accuracy rate of 99%.

[0035] 2. Access Layer Deployment: Deploy 400 low-altitude communication base stations along 20 major flight routes and 30 take-off and landing points, with a coverage radius of approximately 2.2km in the 1.8GHz band; deploy 150 4G WiFi auxiliary units located in base station blind spots; deploy 12 high-altitude relay nodes on floating platforms to cover coastal areas and drones to cover mountainous areas; connect to 3 BeiDou-3 MEO satellites to achieve coverage in oceans and remote mountainous areas.

[0036] 3. Terminal Layer Deployment: Multi-mode communication modules were installed on 800 aircraft. The UAV modules adopted a WiFi 6+ multi-band design, while the helicopter modules added BeiDou short message enhancement functionality. Test data: L-band communication was used in conventional scenarios; switching to C-band was used in high-definition mapping scenarios; automatic access to 4G WiFi units was achieved in mountainous scenarios; switching to the BeiDou satellite link was used in marine scenarios; under interference scenarios, the frequency hopping anti-interference gain was 12dB, and the link remained uninterrupted.

[0037] 4. Operator Collaboration Test: When the dedicated network load reaches 85%, a request is made to the mobile operator to share 20MHz of idle spectrum. After sharing, the bandwidth utilization rate decreases. A base station is manually interrupted, and the Unicom network takes over within 100ms without interruption of communication. Fault information is synchronously pushed to the operator's operation and maintenance system, and the joint handling time is very short.

[0038] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dedicated communication network for low-altitude airspace, characterized in that, The system comprises a core layer, an access layer, and a terminal layer. The core layer deploys a regional control server, a data forwarding center, and a network management platform for global communication resource scheduling, data processing, and network monitoring. The access layer includes low-altitude communication base stations and high-altitude relay nodes to form three-dimensional signal coverage in the low-altitude airspace. The terminal layer consists of communication modules integrated into low-altitude aircraft to establish communication links with the access layer. The core layer, access layer, and terminal layer achieve stable transmission of air-to-ground information through multi-band fusion transmission, dynamic anti-interference, and intelligent resource scheduling technologies.

2. The low-altitude airspace dedicated communication network according to claim 1, characterized in that, The resource scheduling process of the regional control server includes: The system collects terminal layer data on aircraft position, speed, service type, communication bandwidth requirements, and BeiDou positioning; it also collects access layer data on base station load, relay node link quality, 4G WiFi coverage strength, and satellite link latency; it collects operator network spectrum occupancy and load data; and it calculates scheduling parameters based on the above data. A resource scheduling matrix is ​​constructed based on scheduling parameters, and a genetic algorithm is used to solve for the optimal resource allocation scheme, which includes frequency band allocation, link selection, and power adjustment parameters. The optimal resource allocation plan is distributed to the access layer and terminal layer, the execution effect is tracked in real time, and the plan is dynamically updated according to changes in the flight situation.

3. A low-altitude airspace dedicated communication network according to claim 1, characterized in that, The data forwarding center adopts a layered forwarding architecture, including edge forwarding nodes and core forwarding nodes. Edge forwarding nodes are deployed at the interface between the access layer and the core layer to preprocess and cache the data uploaded by the access layer locally. Core forwarding nodes are deployed inside the core layer to realize cross-regional data interaction and interface with the terrestrial public communication network.

4. A low-altitude airspace dedicated communication network according to claim 1, characterized in that, The multi-band converged transmission technology employs UHF, L, S, and C bands working in tandem. The UHF band is used for initial link establishment and emergency communication between the terminal layer and the access layer, the L / S band is used for regular service data transmission, and the C band is used for high-bandwidth service transmission. Seamless switching between the bands is achieved through a band switching module. The switching triggering conditions include link quality threshold, service bandwidth requirements, and interference intensity.

5. A low-altitude airspace dedicated communication network according to claim 1, characterized in that, The dynamic anti-interference technology includes: The low-altitude communication base station and high-altitude relay node of the access layer have built-in interference detection units, and use the energy detection method to detect interference signals in real time. The core layer network management platform generates anti-interference strategies based on interference detection results, using adaptive frequency hopping and beamforming technologies, and distributes them to the access layer and terminal layer. The terminal layer's communication module performs frequency hopping avoidance or signal enhancement processing through the anti-interference processing unit, while the access layer suppresses interference signals by adjusting the beam direction.

6. A low-altitude airspace dedicated communication network according to claim 1, characterized in that, It also includes building a relay communication network based on high-altitude relay nodes, specifically: Monitor high-altitude relay nodes in low-altitude airspace; The spatial location of each high-altitude relay node is calculated individually to obtain the spatial coordinates of each relay node. Spatial distribution analysis is performed on the spatial location coordinates of each relay node to generate spatial distribution data of the relay nodes; The topological connection evolution between relay nodes is performed on the spatial distribution data of relay nodes to obtain the topological logic of relay nodes; Based on the relay node topology logic, a distributed relay topology fitting is performed on the high-altitude relay nodes to construct a relay communication network.

7. A low-altitude airspace dedicated communication network according to claim 2, characterized in that, The intelligent resource scheduling of the regional control server is solved using an objective optimization function, the expression of which is: Where: F is the resource scheduling evaluation coefficient, and α, β, and γ are weighting coefficients; Let be the actual bandwidth of the i-th link. The maximum bandwidth of the i-th link; Let J be the link signal-to-noise ratio of the j-th communication node. The maximum signal-to-noise ratio threshold for the j-th node; Let K be the interference intensity of the k-th frequency band. This represents the maximum permissible interference intensity for the k-th frequency band.

8. A low-altitude airspace dedicated communication network according to claim 1, characterized in that, The coverage radius of the low-altitude communication base station in the access layer satisfies the formula: Where: R is the coverage radius of the base station; This refers to the base station's transmit power. For the base station transmit antenna gain; λ is the terminal receiving antenna gain; λ is the communication carrier wavelength; L is the total link loss; This is the minimum received power for the terminal.

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