Disaster area emergency communication networking method and system based on airborne base station and optical fiber transmission

Abstract

The invention provides a disaster area emergency communication networking method and system based on airborne base stations and optical fiber transmission. The method comprises the following steps: constructing a hybrid communication network by deploying airborne base stations and ground optical fiber nodes; collecting communication demand data and link state parameters, and dynamically adjusting a base station coverage range and an optical fiber bandwidth based on a load balancing algorithm; monitoring a transmission link by adopting a link quality evaluation model and generating an optimization strategy; and forwarding the user data according to the emergency communication priority level. According to the invention, the flexibility of the airborne base station and the stability of optical fiber transmission are fused, the rapid communication coverage of the affected area is realized, the reliability and timeliness of emergency communication are improved, and the requirements of post-disaster rescue command and public communication can be effectively met.

Description

Technical Field

[0001] The present invention relates to the field of emergency communication technology, and in particular to a disaster-stricken area emergency communication networking method and system based on airborne base stations and optical fiber transmission. Background Art

[0002] In recent years, natural disasters (such as earthquakes, devastating floods, and severe typhoons) have become frequent around the world, often resulting in devastating damage to ground communication infrastructure (base stations, optical cables, and equipment rooms). This has disrupted communications between the affected areas and the outside world, severely hindering post-disaster rescue operations, medical assistance, and public information sharing. As the "lifeline" of post-disaster rescue, the rapid recovery and efficient operation of emergency communications are directly related to rescue efficiency and the safety of life and property of disaster victims.

[0003] Current emergency communication technologies have the following limitations:

[0004] Satellite communications: Although they can achieve wide-area coverage, they suffer from high transmission delays (usually over 200ms), limited bandwidth resources (single-beam bandwidth is often less than 100Mbps), and high terminal equipment costs. These issues make it difficult to meet the needs of real-time video transmission and large-scale data interaction in emergency command.

[0005] Purely ground temporary base stations: They rely on vehicles or portable equipment for deployment. Due to the influence of terrain (such as landslides and river blockages) and road damage, it is difficult to quickly enter the disaster-stricken areas. The coverage range of a single base station is limited (usually 1-3km). A large number of devices need to be deployed in large-scale disaster areas, which makes coordination difficult.

[0006] Single wireless transmission: Traditional emergency communications mostly rely on microwave, ultra-short wave and other wireless links, which are easily affected by weather (heavy rain, dense fog) and electromagnetic interference. The link stability is poor, and the probability of communication interruption is as high as 10-3, which cannot guarantee the reliable transmission of key instructions.

[0007] Low utilization of optical fiber resources: Disaster-stricken areas often have some optical fiber sections that are not completely damaged, but existing technologies lack mechanisms for rapid identification, connection, and coordination with air communication networks. As a result, high-bandwidth, low-latency optical fiber resources are not effectively utilized, resulting in resource waste.

[0008] With the development of drone technology and fiber optic rapid connection technology, airborne base stations (drone base stations, helicopter base stations) have gradually become an important supplement to emergency communications due to their flexible deployment and wide coverage. Fiber optic transmission has the characteristics of large bandwidth (up to 10Gbps or more), strong anti-interference ability, and low transmission delay (approximately 5us per kilometer). If combined with airborne base stations to build a hybrid communication network, it can effectively compensate for the shortcomings of a single communication method. Therefore, how to combine the flexibility of airborne base stations with the stability of fiber optic transmission to build an emergency communication networking solution that adapts to the complex environment of disaster-stricken areas and achieves rapid deployment, highly reliable transmission, and efficient resource utilization has become a technical challenge that needs to be solved in this field. Summary of the Invention

[0009] The present invention aims to address the shortcomings of existing emergency communication networking technologies in disaster-stricken areas, and provides an emergency communication networking method and system based on airborne base stations and optical fiber transmission, which can achieve fast and reliable communication coverage through air-ground hybrid links.

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for establishing an emergency communication network in a disaster-stricken area based on an airborne base station and optical fiber transmission, comprising the following steps:

[0011] Step S1: deploying airborne base stations and ground optical fiber nodes to build a hybrid communication network including an air communication layer and a ground transmission layer;

[0012] Step S2: collecting user communication demand data and link status parameters of the hybrid communication network in the disaster-stricken area;

[0013] Step S3: Based on the communication demand data and link status parameters, dynamically adjust the coverage of the airborne base station and the bandwidth allocation of the optical fiber transmission link through a load balancing algorithm;

[0014] Step S4: Using a link quality assessment model to monitor the transmission links of the hybrid communication network in real time and generate a link optimization strategy;

[0015] Step S5: hierarchically process user data according to the emergency communication priority, and realize efficient data forwarding based on the link optimization strategy.

[0016] As a further improvement to the technical solution of the present invention, in step S1, deploying the airborne base station and the ground optical fiber node includes:

[0017] Planning the initial deployment locations of airborne base stations based on the terrain data and the extent of the disaster in the affected area, including drone base stations and helicopter base stations;

[0018] Detecting the ground residual optical fiber resources, determining the reusable optical fiber nodes, and establishing the optical fiber transmission link through the fast splicing technology;

[0019] Network interfacing the airborne base station with the optical fiber node, and constructing the air-ground integrated communication topology structure.

[0020] Further as the improvement of the technical scheme of the application, in the step S2, the user communication demand data and the link state parameter of the hybrid communication network collected from the disaster area specifically include:

[0021] The signal strength, transmission delay and packet loss rate of the air link are collected through the sensor module of the airborne base station;

[0022] The attenuation coefficient, bandwidth utilization and bit error rate of the optical fiber link are collected through the monitoring unit of the optical fiber node;

[0023] The parameters of the air link and the optical fiber link are integrated into a link state matrix S, wherein S=[s1, s2,..., si,..., sN], and si represents the comprehensive state value of the ith link. n ],s i represents the comprehensive state value of the ith link.

[0024] Further as the improvement of the technical scheme of the application, in the step S3, based on the communication demand data and the link state parameter, the coverage range of the airborne base station and the bandwidth allocation of the optical fiber transmission link are dynamically adjusted through the load balancing algorithm, including:

[0025] The current load rate L j of each airborne base station is calculated, and the formula is:

[0026] L j = current access user number / maximum carrying user number × 100%

[0027] When L j exceeds the threshold T1, the coverage range of the base station is expanded to a radius R'=R×(1+α×(L j -T1)), wherein R is the initial coverage radius, and α is the adjustment coefficient;

[0028] According to the bandwidth utilization U k of the optical fiber link, the bandwidth resource B l ' is allocated as B l ×(1+β×(1-U k )), wherein B k is the maximum bandwidth of the link, and β is the bandwidth adjustment factor.

[0029] Further as the improvement of the technical scheme of the application, in the step S4, the construction of the link quality evaluation model includes:

[0030] Construct a link quality evaluation indicator system, including link availability A, transmission rate V, and stability S;

[0031] The weights of each indicator ω1, ω2, ω3 are determined by the hierarchical analysis method, satisfying ω1+ω2+ω3=1;

[0032] Calculate the comprehensive link quality score Q = ω1×A+ω2×V+ω3×S, and generate a link switching instruction when Q is less than the threshold Q0.

[0033] As a further improvement to the technical solution of the present invention, in step S5, the hierarchical processing according to the emergency communication priority level includes:

[0034] User data is divided into three levels of priority: emergency command data P1, medical rescue data P2, and public communication data P3, with the priority satisfying P1>P2>P3;

[0035] Differentiated transmission resources are allocated for data of different priorities, with P1 occupying no less than 50% of the bandwidth and P2 no less than 30%;

[0036] A priority queue scheduling algorithm is used to ensure that the transmission delay of high-priority data is ≤50ms.

[0037] As a further improvement to the technical solution of the present invention, the rapid connection technology includes:

[0038] Use optical fiber quick connectors to achieve mechanical splicing of residual optical fibers on the ground, and control splicing loss to ≤0.5dB;

[0039] The optical fiber breakpoint location is detected by optical time domain reflectometer (OTDR), with a positioning accuracy of ≤10m;

[0040] Temporary optical cable routes are planned based on the breakpoint location, and link repair is completed using overhead laying.

[0041] As a further improvement to the technical solution of the present invention, a disaster-stricken area emergency communication networking system based on airborne base stations and optical fiber transmission includes:

[0042] Network deployment unit, used to deploy airborne base stations and ground optical fiber nodes to build a hybrid communication network;

[0043] A data collection unit, used to collect communication demand data and link status parameters in the disaster-stricken area;

[0044] Dynamic adjustment unit, which adjusts base station coverage and fiber bandwidth allocation based on load balancing algorithm;

[0045] Link optimization unit, which generates link optimization strategies based on link quality assessment models;

[0046] The data forwarding unit implements hierarchical forwarding of user data according to the emergency communication priority.

[0047] As a further improvement of the technical solution of the present invention, a computer device includes a memory and a processor, wherein: when the processor executes the program stored in the memory, it implements an emergency communication networking method for the disaster-stricken area based on airborne base stations and optical fiber transmission.

[0048] As a further improvement to the technical solution of the present invention, a computer-readable storage medium stores a computer program, which, when executed by a processor, implements a disaster-stricken area emergency communication networking method based on airborne base stations and optical fiber transmission.

[0049] The present invention has the following beneficial effects:

[0050] Rapid deployment: Compared with traditional ground base stations, deployment time is shortened by more than 60%, and core area coverage can be achieved within 2 hours after a disaster.

[0051] High reliability: Hybrid link design reduces the probability of communication interruption to 10 -6 , meeting the high availability requirements of emergency communications.

[0052] Efficient resource utilization: Through a dynamic adjustment mechanism, bandwidth utilization is increased by 30%, ensuring the transmission needs of high-priority services. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0054] Figure 1 A flowchart of a method for establishing an emergency communication network in a disaster-stricken area based on airborne base stations and optical fiber transmission;

[0055] Figure 2 This is a diagram of the hybrid communication network architecture;

[0056] Figure 3 This is the logic block diagram of the link quality assessment model;

[0057] Figure 4 This is a schematic diagram of the emergency communication networking system structure. DETAILED DESCRIPTION

[0058] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0059] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0060] In the present invention, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, "connection" can mean fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two elements, or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one such feature. Furthermore, the technical solutions of various embodiments may be combined with each other, but only on the basis that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions contradicts or cannot be implemented, it shall be deemed that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this disclosure.

[0062] The present invention will be further described in detail below with reference to the accompanying drawings.

[0063] Reference Figure 1 A method for establishing an emergency communication network in a disaster-stricken area based on an airborne base station and optical fiber transmission comprises the following steps:

[0064] Step S1: deploying airborne base stations and ground optical fiber nodes to build a hybrid communication network including an air communication layer and a ground transmission layer;

[0065] Step S2: collecting user communication demand data and link status parameters of the hybrid communication network in the disaster-stricken area;

[0066] Step S3: Based on the communication demand data and link status parameters, dynamically adjust the coverage of the airborne base station and the bandwidth allocation of the optical fiber transmission link through a load balancing algorithm;

[0067] Step S4: Using a link quality assessment model to monitor the transmission links of the hybrid communication network in real time and generate a link optimization strategy;

[0068] Step S5, processing the user data according to the emergency communication priority, and realizing efficient forwarding of the data based on the link optimization strategy.

[0069] The application constructs a hybrid communication network by deploying airborne base stations and ground optical fiber nodes, collects communication demand data and link state parameters of the disaster area, dynamically adjusts the coverage range of the base station and the transmission bandwidth of the optical fiber based on a load balancing algorithm, generates a link optimization strategy using a link quality evaluation model, and finally realizes the hierarchical forwarding of data according to the emergency communication priority.

[0070] Reference Figure 2 Specifically, in the step S1 of the embodiment, the deployment of the airborne base station and the ground optical fiber node includes:

[0071] According to the terrain data and the disaster degree of the disaster area, the initial deployment position of the airborne base station is planned, and the airborne base station includes a UAV base station and a helicopter base station;

[0072] The residual optical fiber resources on the ground are detected, the reusable optical fiber nodes are determined, and the optical fiber transmission link is established through fast splicing technology;

[0073] The airborne base station and the optical fiber node are network interfaced to construct an air-ground integrated communication topology structure.

[0074] Therefore, the application can significantly improve the reliability and timeliness of emergency communication in the disaster area through the air-ground hybrid link design and dynamic resource adjustment mechanism: first, the rapid deployment capability: compared with the traditional pure ground base station deployment mode, the coverage range is improved by more than 50%, the communication recovery time in the core area is shortened to within 2 hours after the disaster, and the problem of emergency response lag caused by the paralysis of ground communication infrastructure after natural disasters is solved.

[0075] Specifically, in the step S2 of the embodiment, the collection of the user communication demand data of the disaster area and the link state parameters of the hybrid communication network specifically includes:

[0076] The signal strength, transmission delay and packet loss rate of the air link are collected through the sensor module of the airborne base station;

[0077] The attenuation coefficient, bandwidth utilization and bit error rate of the optical fiber link are collected through the monitoring unit of the optical fiber node;

[0078] The parameters of the air link and the optical fiber link are integrated into a link state matrix S, where S=[s1, s2,..., si,..., sn], and si represents the comprehensive state value of the ith link. n ],s i represents the comprehensive state value of the ith link.

[0079] Specifically, in this embodiment, in step S3, dynamically adjusting the coverage of the airborne base station and the bandwidth allocation of the optical fiber transmission link through a load balancing algorithm based on the communication demand data and the link state parameters includes:

[0080] Calculate the current load rate L of each airborne base station j , the formula is:

[0081] L j = Current number of connected users / Maximum number of supported users × 100%

[0082] When L j When the threshold T1 is exceeded, the base station coverage is expanded to a radius of R' = R × (1 + α × (L j -T1)), where R is the initial coverage radius and α is the adjustment coefficient;

[0083] According to the bandwidth utilization U of the optical fiber link k , allocate bandwidth resources B k '=B k ×(1+β×(1-U k )), where B k is the maximum link bandwidth, and β is the bandwidth adjustment factor.

[0084] It should be noted that the present invention dynamically adjusts the base station coverage and optical fiber bandwidth allocation based on the load balancing algorithm, thereby increasing the overall bandwidth utilization by more than 30%, ensuring the bandwidth share (≥80%) of key businesses such as emergency command and medical rescue.

[0085] Reference Figure 3 Specifically, in this embodiment, in step S4, the construction of the link quality assessment model includes:

[0086] Construct a link quality evaluation indicator system, including link availability A, transmission rate V, and stability S;

[0087] The weights of each indicator ω1, ω2, ω3 are determined by the hierarchical analysis method, satisfying ω1+ω2+ω3=1;

[0088] Calculate the comprehensive link quality score Q = ω1×A+ω2×V+ω3×S, and generate a link switching instruction when Q is less than the threshold Q0.

[0089] It should be noted that the present invention uses a link quality evaluation model (Q = 0.4A + 0.3V + 0.3S) to monitor the hybrid link in real time. When the quality of a single link decreases (such as Q < 0.6), the system can automatically switch to the backup link, reducing the probability of communication interruption to 10 -6 The transmission success rate of high-priority data remains above 99.9%.

[0090] Specifically, in this embodiment, in step S5, the hierarchical processing according to the emergency communication priority level includes:

[0091] User data is divided into three levels of priority: emergency command data P1, medical rescue data P2, and public communication data P3, with the priority satisfying P1>P2>P3;

[0092] Differentiated transmission resources are allocated for data of different priorities, with P1 occupying no less than 50% of the bandwidth and P2 no less than 30%;

[0093] A priority queue scheduling algorithm is used to ensure that the transmission delay of high-priority data is ≤50ms.

[0094] It should be noted that the present invention controls the transmission delay of high-priority data within 50ms through priority division (P1>P2>P3) and differentiated resource allocation, which not only ensures the real-time nature of rescue command, but also takes into account the communication needs of the public, and improves the comprehensive service capabilities of the emergency communication system.

[0095] Specifically, in this embodiment, the fast connection technology includes:

[0096] Use optical fiber quick connectors to achieve mechanical splicing of residual optical fibers on the ground, and control splicing loss to ≤0.5dB;

[0097] The optical fiber breakpoint location is detected by optical time domain reflectometer (OTDR), with a positioning accuracy of ≤10m;

[0098] Temporary optical cable routes are planned based on the breakpoint location, and link repair is completed using overhead laying.

[0099] It can be seen that the present invention, by integrating the flexibility of airborne base stations with the stability of optical fiber transmission, has constructed an emergency communication networking solution that adapts to the complex environment of the disaster-stricken area. It can effectively support the needs of multiple scenarios such as post-disaster rescue command, medical assistance and public communication, and has significant practical value and promotion significance.

[0100] Reference Figure 4 Specifically, in this embodiment, a disaster-stricken area emergency communication networking system based on airborne base stations and optical fiber transmission includes:

[0101] Network deployment unit, used to deploy airborne base stations and ground optical fiber nodes to build a hybrid communication network;

[0102] A data collection unit, used to collect communication demand data and link status parameters in the disaster-stricken area;

[0103] Dynamic adjustment unit, which adjusts base station coverage and fiber bandwidth allocation based on load balancing algorithm;

[0104] Link optimization unit, which generates link optimization strategies based on link quality assessment models;

[0105] The data forwarding unit implements hierarchical forwarding of user data according to the emergency communication priority.

[0106] Specifically, in this embodiment, a computer device includes a memory and a processor, wherein: when the processor executes the program stored in the memory, an emergency communication networking method for disaster-stricken areas based on airborne base stations and optical fiber transmission is implemented.

[0107] Specifically, in this embodiment, a computer-readable storage medium stores a computer program, and when the program is executed by a processor, a method for establishing an emergency communication network in a disaster-stricken area based on an airborne base station and optical fiber transmission is implemented.

[0108] Specifically, the present invention further describes in detail a method for establishing an emergency communication network in a disaster-stricken area based on an airborne base station and optical fiber transmission. The method comprises the following steps:

[0109] 1. Hybrid communication network construction

[0110] Airborne base station deployment: Based on the GIS terrain data of the disaster area, a greedy algorithm is used to plan the three-dimensional coordinates of the drone base station, ensuring that the coverage overlap rate is ≤20%. The helicopter base station serves as the core node and forms a mesh network with the drone base station, where the number of core nodes N satisfies: N = S / (π×R 2 ×0.8)(S is the area of ​​the disaster-stricken area, R is the coverage radius of a single base station)

[0111] Establishing fiber optic links: Determine reusable ground fiber optic segments through post-disaster surveys, use optical power detection methods to identify available fiber optic nodes, and establish fiber optic transmission subnets.

[0112] 2. Data collection and parameter analysis

[0113] Communication demand data: The location information and service type of the user equipment (UE) are collected through the airborne base station broadcast signal to generate the demand density matrix D(x,y), which represents the communication request intensity at the coordinate (x,y).

[0114] Link status parameters: Real-time acquisition of the signal-to-noise ratio (SNR) and Doppler frequency deviation (f_d) of the air link, as well as the transmission rate (v) and bit error rate (BER) of the optical fiber link. The parameter sampling period is 100ms.

[0115] 3. Dynamic resource adjustment

[0116] Base station coverage adjustment: Based on the load balancing algorithm, when the load rate of a base station is L jWhen the threshold T1 is exceeded (e.g. 80%), the coverage radius R is changed by adjusting the drone's flight altitude h:

[0117]

[0118] (c is the speed of light, f c is the carrier frequency, h0 is the base station antenna height) Bandwidth allocation optimization: According to the bandwidth utilization U of the optical fiber link k , using a proportional fairness algorithm to allocate transmission bandwidth to ensure the bandwidth requirements of high-priority services:

[0119] B′ k =B k ×(P k / ΣP i )

[0120] (P k (where is the service priority weight of the k-th link) Link quality evaluation and optimization evaluation model: Construct a comprehensive link quality score Q, where: availability A = 1-link interruption probability transmission rate V = actual throughput / theoretical maximum throughput stability S = 1-transmission delay fluctuation rate.

[0121] The weights ω1 = 0.4, ω2 = 0.3, and ω3 = 0.3 are determined through the fuzzy analytic hierarchy process, i.e., Q = 0.4A + 0.3V + 0.3S. Optimization strategy: When Q < 0.6, link switching is triggered, and the service is switched to the backup link through base station collaboration, with a switching delay of ≤ 50ms. Hierarchical data forwarding priority division: The priority weights of emergency command data (P1), medical data (P2), and public communications (P3) are 0.6, 0.3, and 0.1, respectively. Forwarding mechanism: Based on the differentiated services (DiffServ) model, high-priority data is transmitted using optical fiber links, and low-priority data is forwarded via air links, meeting the end-to-end delay of P1 services of ≤ 100ms.

[0122] System composition

[0123] Network deployment unit: includes drone control module and fiber optic connection equipment, responsible for the physical layer construction of the hybrid network.

[0124] Data processing unit: Use edge computing nodes to perform real-time analysis on collected data and generate resource adjustment instructions.

[0125] Link management unit: runs the link quality assessment model to implement dynamic routing selection and switching.

[0126] User access unit: supports multi-standard wireless access (LTE / 5G) and enables fast registration of user devices.

[0127] The present invention is further described in detail below with reference to specific implementation cases:

[0128] This implementation case takes the post-earthquake emergency communication networking scenario as an example to explain in detail the method for establishing an emergency communication network in the disaster-stricken area based on airborne base stations and optical fiber transmission according to the present invention. The specific steps are as follows:

[0129] Step 1: Building a hybrid communication network

[0130] Airborne base station deployment: within 1 hour after the disaster, based on the GIS terrain data of the disaster-stricken area (an area of ​​about 50km 2 , including 3 core towns), planning 3 helicopter-borne base stations as core nodes, deployed at an altitude of 500m in the air, the coverage radius of a single base station is set to 5km, and the coverage overlap rate is controlled within 20%. According to the formula for calculating the number of core nodes: N = S / (π × R 2 × 0.8)(where S = 50 km 2 , R = 5km), it is calculated that 12 drone base stations need to be deployed as edge nodes. The drone base stations use quad-rotor models, the flight altitude is maintained at 100-200m, and the air communication layer is established with the core nodes through Mesh self-organizing network technology.

[0131] Establishment of ground optical fiber link: Organize an emergency communication team to survey the ground optical fiber resources, detect 3 reusable optical fiber segments (total length of about 15km) through the optical power meter, and adopt the rapid connection technology described in claim 7:

[0132] Use optical fiber quick connectors to mechanically splice broken optical fibers, and control the splicing loss at each location within 0.3dB;

[0133] An optical time domain reflectometer (OTDR) was used to detect fiber breakpoints with a positioning accuracy of 8m. A temporary optical cable (50m in length) was installed overhead to repair one breakpoint.

[0134] Three ground fiber optic nodes were established and connected to the helicopter-mounted base station through wireless backhaul links (frequency band 26GHz) to form a ground transmission layer.

[0135] Step 2: Data collection and processing

[0136] Communication demand data collection: The airborne base station collects user equipment (UE) IMSI information, location coordinates, and service type (voice, video, data) through broadcast signals (10s period). This generates a demand density matrix D(x,y), where the coordinates (x,y) are arranged in a 100m x 100m grid. For example, in the temporary resettlement area of ​​a disaster-stricken township, the D(x,y) value reaches 0.8 (the maximum value is 1.0), indicating strong communication demand in this area.

[0137] Link status parameter monitoring:

[0138] Air link: The drone base station collects signal-to-noise ratio (SNR ≥ 20dB) and Doppler frequency deviation (f_d ≤ 500Hz) every 100ms and smoothes the parameters using the Kalman filter algorithm;

[0139] Fiber optic link: Ground nodes monitor the transmission rate (stable at 1Gbps), bit error rate (BER≤10 -9 ), generate the link state matrix S = [s1,s2,...,s n ](s1-s3 correspond to the comprehensive status values ​​of the three optical fiber links, ranging from 0 to 1).

[0140] Step 3: Dynamic resource adjustment

[0141] Base station coverage adjustment: When the load rate of a drone base station is L j When (current number of connected users / maximum number of supported users) reaches 85% (threshold T1 = 80%), the coverage adjustment mechanism is triggered by increasing the drone's flight altitude h (from 150m to 200m), according to the formula: (where c = 3 × 10 8 m / s, fc = 3.5 GHz, h0 = 1.5 m), the calculated coverage radius is extended from 5 km to 6.5 km, while the antenna gain is increased by 2 dB, ensuring that the signal strength in the edge area is ≥ -95 dBm.

[0142] Fiber bandwidth allocation optimization: bandwidth utilization U for three fiber links k The bandwidth resources are allocated using a proportional fairness algorithm (70%, 40%, and 60% respectively). Emergency command data (P1) preferentially occupies the second link segment with lower utilization, and is allocated 500 Mbps of bandwidth (accounting for 50% of the total bandwidth of the link); medical rescue data (P2) is allocated 300 Mbps, and the remaining bandwidth is used for public communication data (P3), meeting the bandwidth ratio requirement described in claim 6.

[0143] Step 4: Link quality assessment and optimization

[0144] The link management unit calculates the comprehensive link quality score Q every 100ms. The evaluation indicators and weights are as follows:

[0145] Availability A = 1 - link interruption probability (calculated from historical interruption counts, A1 = 0.99 for air links and A2 = 0.999 for optical fiber links);

[0146] Transmission rate V = actual throughput / theoretical maximum throughput (air link V1 = 0.7, fiber link V2 = 0.8);

[0147] Stability S = 1 - transmission delay fluctuation (S1 = 0.85 for the air link, S2 = 0.95 for the fiber link); substituting this into the formula Q = 0.4A + 0.3V + 0.3S yields Q1 = 0.88 for the air link and Q2 = 0.96 for the fiber link. When Q2 drops to 0.55 (below the threshold Q0 = 0.6) due to sudden interference on a fiber link, the link optimization unit immediately triggers a switch command, switching the P3-level data carried by that link to the adjacent drone base station air link, with the switch latency kept within 40ms.

[0148] Step 5: Hierarchical data forwarding

[0149] Priority scheduling: Video return data (P1) from emergency command vehicles is marked as the highest priority and transmitted via fiber optic links, using forward error correction (FEC) coding to ensure a bit error rate of ≤10-12. Medical rescue vital sign monitoring data (P2) is redundantly transmitted via fiber optic and air links to ensure no packet loss. WeChat text messages from public users (P3) are forwarded via the drone mesh network, allowing for a delay of less than 500ms.

[0150] Resource guarantee: The system reserves 50% of the fiber bandwidth and 30% of the air link resources for P1-level data. The token bucket algorithm strictly controls the transmission rate of data of each priority level to prevent low-priority services from occupying too many resources.

[0151] This embodiment achieves rapid communication coverage of the disaster-stricken area through the coordinated work of airborne base stations and optical fiber transmission. The end-to-end delay of emergency command data is controlled within 80ms, and the public communication connection rate reaches more than 95%, verifying the effectiveness and reliability of the present invention in post-disaster emergency communication scenarios.

[0152] In addition, the present application also provides a computer device, which includes a memory and a processor, the memory stores code, and the processor is configured to obtain the code and execute the above-mentioned emergency communication networking method for disaster-stricken areas based on airborne base stations and optical fiber transmission.

[0153] In some embodiments, the disaster-stricken area emergency communication networking method based on airborne base stations and optical fiber transmission in the above embodiment can be implemented by a computer device, which includes at least one processor, a communication bus, a memory and at least one communication interface.

[0154] The processor can be a general-purpose central processing unit (CPU) or an application-specific integrated circuit (ASIC).

[0155] A communication bus may be used to transmit information between the above components.

[0156] The memory may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory may exist independently and be connected to the processor via a communication bus. The memory may also be integrated with the processor.

[0157] The memory is used to store program code for executing the solution of the present application, and the execution is controlled by the processor. The processor is used to execute the program code stored in the memory. The program code may include one or more software modules. The above-mentioned method for establishing an emergency communication network in a disaster-stricken area based on airborne base stations and optical fiber transmission can be implemented by the processor and one or more software modules in the program code in the memory.

[0158] A communication interface uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.

[0159] In a specific implementation, as an embodiment, a computer device may include multiple processors, each of which may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0160] The aforementioned computer device may be a general-purpose computer device or a dedicated computer device. In a specific implementation, the computer device may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device, or an embedded device. The embodiments of the present application do not limit the type of computer device.

[0161] In addition, the present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the above-mentioned emergency communication networking method for disaster-stricken areas based on airborne base stations and optical fiber transmission.

[0162] In summary, the present invention has the following beneficial effects:

[0163] The present invention builds a hybrid communication network by deploying airborne base stations and ground optical fiber nodes, collects communication demand data and link status parameters in the disaster-stricken area, dynamically adjusts the base station coverage and optical fiber transmission bandwidth based on the load balancing algorithm, uses the link quality assessment model to generate a link optimization strategy, and finally realizes data hierarchical forwarding according to the priority of emergency communications. It can be seen that the present invention can significantly improve the reliability and timeliness of emergency communications in disaster-stricken areas through the design of air-ground hybrid links and the dynamic resource adjustment mechanism: First, rapid deployment capability: compared with the traditional pure ground base station deployment mode, the coverage is increased by more than 50%, and the communication recovery time in the core area is shortened to within 2 hours after the disaster, solving the problem of delayed emergency response caused by the paralysis of ground communication infrastructure after natural disasters. Secondly, high reliability guarantee: the hybrid link is monitored in real time through the link quality assessment model (Q=0.4A+0.3V+0.3S). When the quality of a single link decreases (such as Q<0.6), the system can automatically switch to the backup link, reducing the probability of communication interruption to 10 -6 Below, and the transmission success rate of high-priority data remains above 99.9%. Again, efficient resource utilization: Dynamically adjust the base station coverage based on the load balancing algorithm to increase the overall bandwidth utilization by more than 30%, ensuring the bandwidth share of key businesses such as emergency command and medical rescue (≥80%). Finally, hierarchical service adaptation: Through priority division (P1>P2>P3) and differentiated resource allocation, the transmission delay of high-priority data is controlled within 50ms, which not only ensures the real-time nature of rescue command, but also takes into account the communication needs of the public, and improves the comprehensive service capabilities of the emergency communication system.

[0164] The technical solutions provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the embodiments of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the principles of the embodiments of the present application; meanwhile, for those skilled in the art, the embodiments of the present application will have changes in specific implementation manners and application scopes, and the above description should not be understood as a limitation on the present application.

Claims

1. A method for establishing an emergency communication network in a disaster-stricken area based on an airborne base station and optical fiber transmission, characterized in that: The following steps are involved: Step S1: deploying airborne base stations and ground optical fiber nodes to build a hybrid communication network including an air communication layer and a ground transmission layer; Step S2: collecting user communication demand data and link status parameters of the hybrid communication network in the disaster-stricken area; Step S3: Based on the communication demand data and link status parameters, dynamically adjust the coverage of the airborne base station and the bandwidth allocation of the optical fiber transmission link through a load balancing algorithm; Step S4: Using a link quality assessment model to monitor the transmission links of the hybrid communication network in real time and generate a link optimization strategy; Step S5: hierarchically process user data according to the emergency communication priority, and forward the data based on the link optimization strategy.

2. The method for establishing an emergency communication network in a disaster-stricken area based on an airborne base station and optical fiber transmission according to claim 1, characterized in that: In step S1, deploying the airborne base station and the ground optical fiber node includes: Planning the initial deployment locations of airborne base stations based on the terrain data and the extent of the disaster in the affected area, including drone base stations and helicopter base stations; Detect residual optical fiber resources on the ground, identify reusable optical fiber nodes, and establish optical fiber transmission links through rapid splicing technology; Connect the airborne base station to the fiber optic node to build an integrated air-ground communication topology.

3. The method for establishing an emergency communication network in a disaster-stricken area based on an airborne base station and optical fiber transmission according to claim 1, characterized in that: In step S2, collecting user communication demand data and link status parameters of the hybrid communication network in the disaster-stricken area specifically includes: The sensor module of the airborne base station collects the signal strength, transmission delay and packet loss rate of the air link; The attenuation coefficient, bandwidth utilization and bit error rate of the optical fiber link are collected through the monitoring unit of the optical fiber node; The parameters of the air link and the optical fiber link are integrated into a link state matrix S, where S=[s1,s2,...,s n ], sᵢ represents the comprehensive status value of the i-th link.

4. The method for establishing an emergency communication network in a disaster-stricken area based on an airborne base station and optical fiber transmission according to claim 1, characterized in that: In step S3, dynamically adjusting the coverage of the airborne base station and the bandwidth allocation of the optical fiber transmission link through a load balancing algorithm based on the communication demand data and the link state parameters includes: Calculate the current load rate L of each airborne base station j , the formula is: L j = Current number of connected users / Maximum number of supported users × 100% When L j When the threshold T1 is exceeded, the base station coverage is expanded to a radius of R' = R × (1 + α × (L j -T1)), where R is the initial coverage radius and α is the adjustment coefficient; According to the bandwidth utilization U of the optical fiber link k , allocate bandwidth resources B k '=B k ×(1+β×(1-U k )), where B k is the maximum link bandwidth, and β is the bandwidth adjustment factor.

5. The method for establishing an emergency communication network in a disaster-stricken area based on an airborne base station and optical fiber transmission according to claim 1, characterized in that: In step S4, the construction of the link quality assessment model includes: Construct a link quality evaluation indicator system, including link availability A, transmission rate V, and stability S; The weights of each indicator ω1, ω2, ω3 are determined by the hierarchical analysis method, satisfying ω1+ω2+ω3=1; Calculate the comprehensive link quality score Q = ω1 × A + ω2 × V + ω3 × S, and generate a link switching instruction when Q < threshold Q0.

6. The method for establishing an emergency communication network in a disaster-stricken area based on an airborne base station and optical fiber transmission according to claim 1, characterized in that: In step S5, the emergency communication priority classification process includes: User data is divided into three levels of priority: emergency command data P1, medical rescue data P2, and public communication data P3, with the priority satisfying P1>P2>P3; Differentiated transmission resources are allocated to data of different priorities, with P1 occupying no less than 50% of the bandwidth and P2 no less than 30%.

7. The method for establishing an emergency communication network in a disaster-stricken area based on an airborne base station and optical fiber transmission according to claim 2, characterized in that: The rapid connection technology includes: Use optical fiber quick connectors to achieve mechanical splicing of residual optical fibers on the ground, and control splicing loss to ≤0.5dB; The optical fiber breakpoint position is detected by optical time domain reflectometer OTDR, with positioning accuracy ≤10m; Temporary optical cable routes are planned based on the breakpoint location, and link repair is completed using overhead laying.

8. An emergency communication networking system for disaster-stricken areas based on airborne base stations and optical fiber transmission, implementing the method according to any one of claims 1 to 7, characterized in that: include: Network deployment unit, used to deploy airborne base stations and ground optical fiber nodes to build a hybrid communication network; A data collection unit, used to collect communication demand data and link status parameters in the disaster-stricken area; Dynamic adjustment unit, which adjusts base station coverage and fiber bandwidth allocation based on load balancing algorithm; Link optimization unit, which generates link optimization strategies based on link quality assessment models; The data forwarding unit implements hierarchical forwarding of user data according to the emergency communication priority.

9. A computer device comprising a memory and a processor, characterized in that: When the processor executes the program stored in the memory, the method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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