A task-driven network dynamic enhancement and fallback method and system

Abstract

This invention relates to the field of data communication network technology, specifically to a task-driven network dynamic enhancement and fallback method and system, comprising the following steps: obtaining approved low-altitude flight missions; retrieving 5G base station engineering parameters and air-to-ground dual-beam coverage models covering the flight trajectory; adjusting the air-to-ground beams to the maximum available uplift state and calculating coverage quality point by point; generating low-altitude enhancement strategies when coverage quality meets service thresholds; identifying residual blind spots and generating blind spot compensation enhancement strategies when coverage quality does not meet service thresholds; controlling 5G base stations to load air-to-ground beams within an activation time window; controlling microwave or millimeter-wave blind spot compensation base stations to align with the residual blind spots; releasing blind spot compensation bearers after the mission ends and reclaiming or downweighting the air-to-ground beams. This invention, through task-driven approaches, dual-beam pre-evaluation, residual blind spot compensation, and fallback control, forms a closed loop between low-altitude coverage enhancement and routine ground-based priority coverage.

Description

Technical Field

[0001] This invention relates to the field of data communication network technology, and in particular to a task-driven method and system for dynamic network enhancement and rollback. Background Technology

[0002] The field of data communication network technology encompasses a technical system that utilizes base stations, network management nodes, and terminals to conduct communication data transmission and wireless coverage monitoring. Base stations transmit data to terminals via wireless links, and network management nodes perform beam scheduling and coverage mode control based on coverage requirements and service parameters. Traditional network dynamic enhancement and fallback methods and systems refer to the process of network coverage scheduling and mode switching for UAV flight missions and approved routes issued by the low-altitude management platform. The network management node obtains the UAV mission identifier and route trajectory data sent by the low-altitude service station, compares the current operating parameters of base stations within the route coverage area with preset thresholds using policy matching logic, and issues control commands to base stations during low-altitude flight missions to adjust antenna beam direction to improve signal coverage in low-altitude areas. Upon completion of the flight mission, control commands are sent to restore the base stations to their normal ground-priority coverage mode.

[0003] Traditional low-altitude communication coverage scheduling relies heavily on base station operating parameter thresholds and mode recovery after mission completion. There is a lack of feedforward linkage between low-altitude mission data and operator network control. Base station coverage adjustment focuses on a single beam direction and fixed coverage strategy. There is a lack of coordinated constraints between ground coverage assurance and low-altitude coverage enhancement. Coverage gaps are formed in low-altitude sections of air routes due to building obstruction, station spacing, and low-altitude service continuity requirements. Network transformation tends to shift to long-term, large-scale construction, resulting in a mismatch between resource investment and actual low-altitude service demand. Summary of the Invention

[0004] The purpose of this invention is to provide a task-driven network dynamic enhancement and rollback method and system, enabling the operator's network to use low-altitude flight missions approved by the government or third-party low-altitude management platform as the trigger. Before the mission is executed, the low-altitude coverage capability is determined based on the flight trajectory, altitude layer, time window, and service quality requirements. During the mission, the required coverage segments of the flight path are controlled on demand. After the mission is completed, the fill-in-the-gap bearers are released and the normal ground priority coverage mode is restored, thereby forming a closed loop of network dynamic enhancement and rollback corresponding to the low-altitude flight mission.

[0005] To achieve the above objectives, this invention provides a task-driven network dynamic enhancement and rollback method, comprising the following steps: The system acquires low-altitude flight missions approved by a government or third-party low-altitude management platform. These missions include a mission identifier, flight trajectory, altitude layer, time window, and service quality requirements. When acquiring a low-altitude flight mission, the system receives mission data from the government or third-party low-altitude management platform via an API or MQTT interface. This data includes the mission identifier, flight trajectory, altitude layer, time window, and service quality requirements. The system verifies the approval status of the mission identifier and the start and end times of the time window. If the approval status corresponding to the mission identifier is valid and the time window meets the start and end time sequence, the low-altitude flight mission is verified as a triggerable mission. If the approval status corresponding to the mission identifier is invalid, or the time window does not meet the start and end time sequence, network dynamic enhancement is not triggered based on the low-altitude flight mission.

[0006] After verifying that the low-altitude flight mission is a triggerable mission, the processing order of the low-altitude flight mission is determined according to the start time of the time window, and the flight trajectory is matched with the 5G base station coverage area; when the flight trajectory does not fall into the 5G base station coverage area, the network dynamic enhancement processing of the low-altitude flight mission ends; when the flight trajectory falls into the 5G base station coverage area, the 5G base station parameters and air-to-ground dual-beam coverage model covering the flight trajectory are retrieved according to the low-altitude flight mission.

[0007] When retrieving the operating parameters of the 5G base station covering the flight trajectory, the flight path segment to be evaluated is determined based on the flight trajectory, the altitude layer, and the time window; the location of the flight path segment to be evaluated is compared with the coverage area of ​​the 5G base station, and 5G base stations with coverage overlap with the flight path segment to be evaluated are selected as candidate base stations; the mechanical pitch angle, carrier frequency band, active antenna array configuration, and current beam configuration are read from the candidate base stations to form model input data corresponding to the air-to-ground dual-beam coverage model.

[0008] When loading the air-to-ground dual-beam coverage model, the mechanical pitch angle is kept constant according to the model input data, and the phase weighting object is determined by the arrangement relationship of the vertical radiating elements in the active antenna array configuration. The phase weighting objects are configured with downtilt weights for forming the ground beam and uptilt weights for forming the air beam. The downtilt weights and uptilt weights are loaded according to the current beam configuration and port grouping relationship, so that the 5G base station forms the ground beam and the air beam in the same coverage evaluation period.

[0009] The air-to-ground beam is adjusted to its maximum available uplift state, and the coverage quality is calculated point-by-point for the flight trajectory based on the air-to-ground dual-beam coverage model. When calculating the coverage quality point-by-point for the flight trajectory, trajectory sampling points are set according to the flight path segment to be evaluated, and the altitude layer is used as the vertical position input for the trajectory sampling points. Based on the air-to-ground dual-beam coverage model, the reference signal received power and signal-to-interference-plus-noise ratio (SNR) of the trajectory sampling points under the maximum available uplift state of the air-to-ground beam are calculated respectively. The reference signal received power and the SNR are compared with the service threshold corresponding to the service quality requirements. When all trajectory sampling points meet the service threshold, a low-altitude enhancement strategy carried by the 5G base station is generated. When at least one trajectory sampling point does not meet the service threshold, the continuous segment including the trajectory sampling points that do not meet the service threshold is determined as a residual blind zone.

[0010] When matching the microwave or millimeter-wave fill-in base station based on the residual blind zone, the flight path segment, altitude layer, and service quality requirements corresponding to the residual blind zone are determined; the flight path segment is matched with the coverage direction and available frequency band of the candidate fill-in base station, and the candidate fill-in base station whose coverage direction points to the flight path segment and whose available frequency band meets the service quality requirements is selected as the microwave or millimeter-wave fill-in base station; the activation time window is generated according to the time window, and the beam pointing and dual connectivity configuration are generated according to the flight path segment to form the fill-in enhancement strategy.

[0011] When the blind spot enhancement strategy is executed within the activation time window, a ground beam holding command and an air beam loading command are sent to the 5G base station, and a blind spot activation command and a beam pointing command are sent to the microwave or millimeter-wave blind spot enhancement base station. The 5G base station holds the ground beam according to the ground beam holding command and loads the air beam according to the air beam loading command. The microwave or millimeter-wave blind spot enhancement base station enters the working state according to the blind spot activation command and aligns with the remaining blind spot according to the beam pointing command. When the 5G base station and the microwave or millimeter-wave blind spot enhancement base station complete the dual-connection configuration, the network enters the low-altitude enhancement mode based on the low-altitude flight mission.

[0012] Upon detection that the low-altitude flight mission has ended, a fallback trigger result is generated based on the mission end notification, the service detection results after the end of the time window, or the UAV registration signaling. When the fallback trigger result is valid, the microwave or millimeter-wave filler base station is controlled to stop providing user plane bearers to the remaining blind area and release the filler radio resources corresponding to the low-altitude flight mission. After the filler radio resources are released, the microwave or millimeter-wave filler base station is controlled to enter a sleep state, and the 5G base station is controlled to retract the air beam or reduce the power of the air beam. After the air beam has been retracted or its power reduced, the network falls back from the low-altitude enhanced mode to the normal ground priority coverage mode.

[0013] The present invention also provides a task-driven network dynamic enhancement and rollback system, which provides support for the above method and includes a task access module, a model invocation module, a coverage evaluation module, an enhancement control module, and a rollback control module. The task access module receives low-altitude flight tasks and sends them to the model invocation module. The model invocation module invokes the 5G base station parameters and air-to-ground dual-beam coverage model covering the flight trajectory according to the low-altitude flight task, and sends the air-to-ground dual-beam coverage model to the coverage evaluation module. The coverage evaluation module calculates the coverage quality of the flight trajectory when the air-to-ground beam is in the maximum available uplift state. When the coverage quality meets the service threshold, it outputs a low-altitude enhancement strategy. When the coverage quality does not meet the service threshold, it determines the residual blind zone and outputs the blind zone determination result. The enhancement control module matches microwave or millimeter-wave blind zone filler base stations according to the blind zone determination result, generates a blind zone filler enhancement strategy, controls the 5G base station to load the air-to-ground beam, and controls the microwave or millimeter-wave blind zone filler base station to align with the residual blind zone. The fallback control module controls the microwave or millimeter-wave blind zone filler base station to release its bearer and go into sleep mode when the low-altitude flight task ends, and controls the 5G base station to retract or downweight the air-to-ground beam.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows: In this invention, network control is triggered by approving low-altitude flight missions, establishing a correspondence between coverage enhancement and flight trajectory, altitude layer, time window, and service quality requirements, reducing fixed enhancements that are out of touch with service needs. A 5G base station air-to-ground dual-beam coverage model forms ground-to-ground and air-to-air beams under constant mechanical pitch angles, allowing ground coverage maintenance to proceed in parallel with low-altitude coverage assessment. Residual blind spots are identified under the maximum available uplift of the air-to-air beam, and microwave or millimeter-wave base stations are matched only to these blind spots, ensuring that blind spot compensation resources are allocated according to segments and time windows. Finally, by triggering bearer release, blind spot compensation hibernation, and air-to-air beam retraction upon mission completion, a closed-loop switching mechanism is established between low-altitude enhancement mode and routine ground-priority coverage mode. Attached Figure Description

[0015] Figure 1 This is a flowchart of the task-driven network dynamic enhancement and rollback method of the present invention; Figure 2 This is a schematic diagram illustrating the low-altitude flight mission and the effect of filling in residual blind spots in this invention. Figure 3 This is a schematic diagram illustrating the effect of the air-to-ground dual-beam coverage model of the present invention; Figure 4 This is a comparison diagram of the low-altitude enhancement mode and the routine ground priority coverage mode of this invention; Figure 5 This is a collaborative diagram of the network dynamic enhancement and rollback system modules of the present invention. Detailed Implementation

[0016] The following embodiments illustrate the specific implementation of the technical solutions described in this invention within the operator-side low-altitude network control system. For ease of understanding, a low-altitude flight mission refers to mission data sent after approval by the government or a third-party low-altitude management platform. This data includes at least a mission identifier, flight trajectory, altitude layer, time window, and service quality requirements. The flight trajectory is a sequence of flight path coordinates that can be read by the operator-side low-altitude network control system. The altitude layer is the vertical flight altitude range corresponding to this flight path coordinate sequence. The time window is the start and end times of the mission that are allowed to be executed. Service quality requirements are used to determine evaluation boundaries such as reference signal received power, signal-to-interference-plus-noise ratio (SIR), and available frequency bands. The air-to-ground dual-beam coverage model refers to forming coverage calculation objects for ground-to-ground and air-to-air beams based on the 5G base station's operating parameters, the arrangement of AAU vertical-dimensional radiating units, vertical-dimensional phase-weighted objects, and port grouping relationships, while maintaining the 5G base station's mechanical pitch angle. Coverage quality refers to evaluable results such as reference signal received power and SIR obtained by trajectory sampling points under air-to-air beam loading conditions. Residual blind spots refer to continuous flight path segments where, even after the air-to-ground beam has reached its maximum available uplift state, at least one trajectory sampling point still fails to meet the service quality requirements corresponding to the service threshold. Low-altitude enhancement mode refers to the operational state where 5G base stations maintain ground coverage and load air-to-ground beams during the mission activation time window, with microwave or millimeter-wave blind spot filler base stations providing supplementary bearers to the residual blind spots when necessary. Routine ground priority coverage mode refers to the operational state formed after the mission ends, where microwave or millimeter-wave blind spot filler base stations release the bearers corresponding to the mission and go into sleep mode, and 5G base stations retract their air-to-ground beams or reduce their power.

[0017] Please see Figures 1 to 5This embodiment provides a task-driven network dynamic enhancement and fallback method, applied to the operator's low-altitude network control system. For approved low-altitude flight missions, without changing the mechanical pitch angle of the 5G base station and maintaining the ground beam, the low-altitude coverage status of the flight trajectory is evaluated using an air-to-ground dual-beam coverage model. For residual blind spots that still do not meet the service threshold, microwave or millimeter-wave base stations are called to fill the blind spots. After the mission is completed, the blind spot filler bearers are released, so that the network is restored to the normal ground priority coverage mode.

[0018] S1. Obtain low-altitude flight missions approved by the government or third-party low-altitude management platform. The low-altitude network control system receives mission data sent by the government or third-party low-altitude management platform through an API interface. The sender of the mission data can be a local low-altitude management platform, flight service station, civil aviation system, big data bureau platform, or a platform in the UAV cloud system that already has mission approval capabilities. After the mission data enters the low-altitude network control system, a low-altitude flight mission is formed. The mandatory fields of the low-altitude flight mission include mission identifier, flight trajectory, altitude layer, time window, and service quality requirements. The mission identifier is used to associate the mission approval status, enhancement strategy, gap-filling enhancement strategy, and rollback results in subsequent processing; the flight trajectory is used to determine the flight path segment to be evaluated; the altitude layer is used as the vertical position input of the trajectory sampling point; the time window is used to determine the trigger period and release period of network enhancement; and the service quality requirements are used to form service thresholds and constrain the available frequency bands and bearer configurations when selecting gap-filling base stations.

[0019] S111, Verify the approval status of the task identifier. The task access stage reads the task identifier from the task data and uses the task identifier to query the approval status carried in the received data. When the approval status indicates that the task has been approved by the government or a third-party low-altitude management platform, the task identifier is added to the list of valid tasks; when the approval status is invalid, missing, or does not match the task identifier, the low-altitude network control system marks the task data as an untriggerable task and does not perform network dynamic enhancement based on the task data. This verification result is output to the task sorting stage to prevent unapproved tasks from triggering changes in network-side resources.

[0020] S112, verify the start and end times of the time window. The task access stage reads the start and end times from the time window and determines whether the start time is earlier than the end time. When the start time is earlier than the end time, the time window enters the available time window state; when the start time is not earlier than the end time, the time field is missing, or the time field format cannot be recognized by the low-altitude network control system, the task data is marked as an untriggerable task. This process ensures that subsequent activation of the time window and rollback triggering results can be traced back to the valid time window, preventing the blind spot base station from being activated during invalid periods.

[0021] S113, when the mission identifier approval status is valid and the time window meets the start and end time sequence, the low-altitude network control system verifies that the low-altitude flight mission is a triggerable mission and determines the processing order according to the start time of the time window. For multiple triggerable missions received within the same control cycle, the low-altitude network control system uses the order of start times as the sorting basis; for missions with the same start time, the order of mission reception time is used as the processing order. The sorting results form a queue of missions to be processed and are output to the flight trajectory coverage matching stage.

[0022] S114, matching the flight trajectory with the 5G base station coverage area. The low-altitude network control system reads the flight path coordinate sequence from the flight trajectory and compares the spatial location corresponding to the flight path coordinate sequence with the 5G base station coverage area already recorded by the operator. When the flight trajectory does not fall into the 5G base station coverage area, the low-altitude network control system ends the network dynamic enhancement processing for this low-altitude flight mission and retains the mission state of not triggering enhancement; when the flight trajectory falls into the 5G base station coverage area, the low-altitude network control system sends the mission to the model call stage to retrieve the 5G base station operating parameters and air-to-ground dual-beam coverage model covering the flight trajectory.

[0023] S2. Based on the low-altitude flight mission, retrieve the 5G base station parameters and air-to-ground dual-beam coverage model covering the flight trajectory. The low-altitude network control system determines the flight path segment to be evaluated based on the flight trajectory, altitude layer, and time window; the flight path segment to be evaluated is a low-altitude spatial flight path object located within the 5G base station coverage area and corresponding to the mission time window. The low-altitude network control system compares the location of the flight path segment to be evaluated with the 5G base station coverage area, selecting 5G base stations with coverage overlap with the flight path segment to be evaluated as candidate base stations. The parameters of the candidate base stations include mechanical pitch angle, carrier frequency band, active antenna array configuration, and current beam configuration. The mechanical pitch angle is used to ensure that the antenna mechanical downtilt state is not changed during the evaluation process; the carrier frequency band is used to determine the 5G bearer frequency band participating in the low-altitude coverage evaluation; the active antenna array configuration is used to determine the vertical radiating element arrangement; and the current beam configuration is used to determine the beam state required for current ground coverage.

[0024] S211, the mechanical pitch angle remains constant based on the model input data. The model invocation process uses the mechanical pitch angle of the candidate base station as a fixed input, without generating mechanical pitch angle adjustment commands for the candidate base station. This fixed input limits subsequent air beamforming to be formed only through electrically tunable phase weights and port grouping relationships, without altering the mechanical tilt foundation upon which ground coverage depends.

[0025] S212, the phase weighting object is determined by the arrangement of the radiating elements in the vertical dimension of the active antenna array (AAU). The phase weighting object is the row of radiating elements or the vertical transceiver channel in the vertical dimension of the AAU that participates in beam direction adjustment. For each phase weighting object, the low-altitude network control system reads its vertical coordinate relationship and the corresponding working wavelength, so that each row of radiating elements can participate in the phase offset configuration according to the same coordinate reference. The phase offset is determined as follows: the phase offset of the nth row of radiating elements is determined by the working wavelength, the vertical coordinate of that row, and the sine value of the electrically adjustable elevation angle; where the vertical coordinate of that row is determined by the position of that row relative to the array center and the vertical element spacing, the vertical element spacing adopts the originally recorded half-wavelength spacing, and the electrically adjustable elevation angle is defined relative to the array normal, with the positive value indicating the upward tilt direction. This textual relationship is only used to explain the phase weighting mechanism and does not introduce new calculation parameters.

[0026] S213, configure downtilt weights for the ground-to-ground beam and uptilt weights for the air-to-air beam for the phase-weighted objects. The downtilt weights are used to maintain ground user coverage, while the uptilt weights for the air-to-air beam are used to cover the altitude layer corresponding to low-altitude flight missions. The low-altitude network control system determines the port resources required for the ground-to-ground beam based on the current beam configuration, and allocates vertical dimension port groups available for low-altitude coverage to the air-to-air beam according to port grouping relationships, so that the same candidate base station forms model states for the ground-to-ground and air-to-air beams within the same coverage assessment period. This model state is output to the coverage assessment stage and serves as input for calculating coverage quality point-by-point on the trajectory.

[0027] S3 adjusts the air-to-ground beam to its maximum available uplift state and calculates coverage quality point-by-point on the flight trajectory based on the air-to-ground dual-beam coverage model. When the coverage quality meets the service threshold corresponding to the service quality requirements, a low-altitude enhancement strategy carried by the 5G base station is generated. The maximum available uplift state refers to the maximum electrically adjustable uplift state that the air-to-ground beam can adopt under the conditions that the mechanical pitch angle of the candidate base station remains unchanged, the ground-to-ground beam remains available, and the port grouping relationship does not disrupt the current ground coverage configuration. This state is jointly limited by the active antenna array configuration of the candidate base station, the current beam configuration, and the port grouping relationship, and is not achieved by changing the mechanical pitch angle.

[0028] S311. Set trajectory sampling points according to the flight path segment to be evaluated. The low-altitude network control system selects trajectory sampling points along the flight path coordinate sequence and uses the altitude layer as the vertical position input of the trajectory sampling points. The coordinates of the trajectory sampling points are derived from the flight path and altitude layer of the low-altitude flight mission, and the sampling points are not generated by reverse engineering using subsequent coverage evaluation results. For the same flight path segment to be evaluated, the trajectory sampling points are arranged in the order of the flight path to form a trajectory sampling point sequence, which is output to the model calculation stage.

[0029] S312 calculates the reference signal received power and signal-to-interference-plus-noise ratio (SIR) of trajectory sampling points under the maximum available uptilt condition for the air-to-ground beam, based on the air-to-ground dual-beam coverage model. The model calculation stage reads the candidate base station operating parameters, air-to-ground beam uptilt weights, ground-to-ground beam downtilt weights, port grouping relationships, and the trajectory sampling point sequence, forming a coverage quality for each trajectory sampling point. The coverage quality output is used by the coverage evaluation stage. The coverage evaluation stage does not directly use the coverage quality of a single candidate base station as the conclusion for the entire trajectory; instead, it saves the reference signal received power and SIR point by point according to the trajectory sampling points.

[0030] S313 compares the reference signal received power and signal-to-interference-plus-noise ratio (SIR / NOT) with the service thresholds corresponding to the service quality requirements. The service thresholds are derived from the service quality requirements in low-altitude flight missions. When the service quality requirements include bandwidth requirements, these bandwidth requirements are used for filtering available frequency bands for fill-in-the-gain base stations and for dual-connectivity configuration constraints; unpublished measured throughput values ​​are not used as substitute indicators for coverage quality. The coverage assessment process performs point-by-point judgment for each trajectory sampling point. When both the reference signal received power and SIR / NOT of a trajectory sampling point meet the corresponding service threshold, the trajectory sampling point is marked as meeting the threshold; when at least one of the reference signal received power and SIR / NOT does not meet the corresponding service threshold, the trajectory sampling point is marked as not meeting the threshold. When the boundary value equals the service threshold, it is treated as meeting the threshold.

[0031] S314, when all trajectory sampling points meet the service threshold, the low-altitude network control system generates a low-altitude enhancement strategy carried by 5G base stations. This low-altitude enhancement strategy includes a mission identifier, participating 5G base stations, an activation time window, ground beamholding instructions, and air beam loading instructions. The activation time window is formed based on the time window of the low-altitude flight mission, and its start and end boundaries can cover pre-flight pre-loading and post-landing release buffers within the range supported by materials. The low-altitude enhancement strategy is output to the enhancement control link, which then issues it to the participating 5G base stations within the corresponding activation time window.

[0032] S4. When the coverage quality does not meet the service threshold corresponding to the service quality requirements, the corresponding segment is identified as a residual blind zone. Based on this residual blind zone, a microwave or millimeter-wave base station is matched to generate a blind zone enhancement strategy, including activation time windows, beam pointing, and dual connectivity configuration. The coverage assessment process reads the threshold determination labels of trajectory sampling points and identifies continuous segments containing trajectory sampling points that do not meet the threshold as residual blind zones. The boundary of a continuous segment is determined by adjacent trajectory sampling points that do not meet the threshold in the flight path sequence. When there are trajectory sampling points that meet the threshold between trajectory sampling points that do not meet the threshold, different residual blind zones are formed, and the interval segments are not merged.

[0033] S411, determine the flight path segment, altitude layer, and service quality requirements corresponding to the residual blind zone. The flight path segment corresponding to the residual blind zone is derived from the continuous segment in the trajectory sampling point sequence that does not meet the threshold. The altitude layer and service quality requirements are adopted from the low-altitude flight mission. These three types of inputs together form the blind zone filling matching input and are output to the candidate blind zone filling base station selection stage.

[0034] S412 matches the flight path segment corresponding to the remaining blind spot with the coverage direction and available frequency band of the candidate fill-in base station. The candidate fill-in base station is a supplementary coverage node among microwave or millimeter-wave fill-in base stations that can be controlled by the low-altitude network control system. The screening process first determines whether the coverage direction of the candidate fill-in base station points to the flight path segment corresponding to the remaining blind spot; if the coverage direction is satisfied, it then determines whether the available frequency band of the candidate fill-in base station can support the bearer constraints in the service quality requirements. Candidate fill-in base stations whose coverage direction does not point to the flight path segment are not included in the subsequent configuration; candidate fill-in base stations whose available frequency band cannot meet the service quality requirements are also not included in the subsequent configuration. Successfully matched candidate fill-in base stations are identified as microwave or millimeter-wave fill-in base stations and output to the fill-in enhancement strategy generation stage.

[0035] S413 generates an activation time window based on the time window and generates beam pointing and dual connectivity configuration based on the flight path segment corresponding to the residual blind zone. The activation time window is based on the time window of the low-altitude flight mission and covers the necessary control buffer before and after mission execution; in the logistics flight path example, the time window is 10:00 to 10:15, and the activation time window can be formed from 9:59:30 to 10:16:00. The beam pointing is determined according to the flight path segment corresponding to the residual blind zone; the blind zone filler base station can be aligned with the residual blind zone in a vertical upward tilt direction and the horizontal pointing is limited to the flight path corridor. The dual connectivity configuration uses a 5G base station as the master node to provide control plane services and a microwave or millimeter-wave blind zone filler base station as the auxiliary node to provide user plane services. The blind zone filler enhancement strategy includes mission identifier, residual blind zone, activation time window, beam pointing, master node, auxiliary node, and bearer release conditions, and is output to the enhancement control link.

[0036] S5, within the activation time window, controls the 5G base station to maintain the ground beam and load the air beam, and controls the microwave or millimeter-wave gap-filling base station to align with the remaining blind spots, enabling the network to enter a low-altitude enhancement mode based on low-altitude flight missions. The enhancement control link reads the low-altitude enhancement strategy or gap-filling enhancement strategy using the mission identifier and issues control commands to the corresponding execution objects when the activation time window arrives. For the 5G base station, ground beam maintenance commands and air beam loading commands are issued; for the microwave or millimeter-wave gap-filling base station, gap-filling activation commands and beam pointing commands are issued.

[0037] In S511, the 5G base station maintains its ground beam according to the ground beam hold command. The ground beam hold command applies to the participating 5G base stations, and the command content corresponds to the downtilt weight of the ground beam and the current beam configuration, ensuring that the basic state of ground priority coverage is not canceled during low-altitude missions. The 5G base station returns to the ground beam hold state after executing the backward enhancement control loop; this state serves as a preliminary verification result for the establishment of the low-altitude enhancement mode.

[0038] In S512, the 5G base station loads the air-to-air beam according to the air-to-air beam loading command. The air-to-air beam loading command applies to the air-to-air beam port group of the same 5G base station, and the command content corresponds to the uplift weight and the maximum available uplift state of the air-to-air beam. After completing the air-to-air beam loading, the 5G base station returns to the air-to-air beam loading state. The ground beam hold state and the air-to-air beam loading state are used together to prove that the 5G base station has entered the air-to-ground dual-beam operation state.

[0039] S513, the microwave or millimeter-wave blind spot filler base station enters the working state according to the blind spot filler activation command and aligns with the remaining blind spot according to the beam pointing command. The blind spot filler activation command applies to the matched microwave or millimeter-wave blind spot filler base station, and the beam pointing command applies to the blind spot filler base station's blind spot filler beam. After execution, the blind spot filler base station returns to the blind spot filler working state and beam alignment state. The enhancement control loop reads the above returned state and binds and saves it with the task identifier, remaining blind spot, and activation time window.

[0040] S514: When a 5G base station and a microwave or millimeter-wave coverage base station complete a dual-connectivity configuration, the network enters the low-altitude enhancement mode. The control plane of the dual-connectivity configuration is carried by the 5G base station as the master node, and the user plane is carried by the microwave or millimeter-wave coverage base station as the secondary node. The low-altitude network control system uses the master node configuration status, secondary node configuration status, ground beam hold status, air beam loading status, and beam alignment status to jointly form the low-altitude enhancement mode verification result. This verification result is output to the mission operation monitoring stage and serves as a prerequisite for subsequent backoff decisions.

[0041] S6, when the low-altitude flight mission is detected to be over, the microwave or millimeter-wave coverage base station is controlled to release its bearer and enter sleep mode, and the 5G base station is controlled to retract its air-to-ground beam or reduce its air-to-ground beam power, causing the network to fall back from the low-altitude enhanced mode to the normal ground-priority coverage mode. The mission operation monitoring link generates a fallback trigger result based on at least one of the following: mission completion notification, service detection results after the time window ends, and drone deregistration signaling. The fallback trigger result is bound to the mission identifier to ensure that the released object is consistent with the mission object in the aforementioned low-altitude enhanced mode.

[0042] S611: When a mission completion notification is received from a government or third-party low-altitude airspace management platform, the mission operation monitoring process reads the mission identifier from the notification and matches it with the mission identifier in the low-altitude enhancement mode verification result. If the match is consistent, a rollback trigger result is generated; if the match is inconsistent, the blind spot filler bearer bound to other mission identifiers is not released.

[0043] S612, when no UAV service corresponding to the low-altitude flight mission is detected after the time window ends, the mission operation monitoring stage generates a rollback trigger result. The service object used for detection is the UAV service corresponding to the mission identifier, and the detection time is bounded by the release buffer supported at the end of the mission time window. If the service corresponding to the mission is still detected, the low-altitude network control system does not immediately enter the release action, but maintains the operating state consistent with the current mission identifier until a trigger condition that can verify the end of the mission is obtained.

[0044] S613: When a drone registration signal is received, the task operation monitoring stage associates the registration signal with the drone service corresponding to the task identifier. If the association is successful, a rollback trigger result is generated; if the association fails, the current task's fill-in bearer is not released based on the registration signal.

[0045] S614, when the backoff trigger result is valid, the backoff control loop controls the microwave or millimeter-wave blind spot filler base station to stop providing user plane bearers to the remaining blind spots and release the blind spot filler radio resources corresponding to the low-altitude flight mission. The released objects include the secondary node bearers bound in the blind spot filler enhancement strategy and the blind spot filler radio resources corresponding to the remaining blind spots. After completing the release, the blind spot filler base station returns to the blind spot filler radio resource release status.

[0046] In S615, after the release of supplementary wireless resources, the fallback control loop controls the microwave or millimeter-wave supplementary base station to enter a dormant state and controls the 5G base station to retract its air-to-ground beam or reduce its air-to-ground beam power. Air-to-ground beam retraction means the 5G base station cancels the air-to-ground beam loading state corresponding to the low-altitude flight mission; air-to-ground beam power reduction means the 5G base station retains the recoverable air-to-ground beam configuration but reduces its transmit power, so that it no longer serves as an enhancement bearer for the low-altitude flight mission. The low-altitude network control system reads the dormant state, air-to-ground beam retraction state, or air-to-ground beam power reduction state of the supplementary base station to verify that the network has fallen back from the low-altitude enhancement mode to the normal ground-priority coverage mode. This fallback verification result is used to terminate the network dynamic enhancement closed loop corresponding to the mission identifier.

[0047] Taking a logistics route in a certain city as an example, the city-level low-altitude management platform pushes low-altitude flight tasks to the operator's low-altitude network control system via RESTAPI. The tasks include route coordinates, an altitude layer of approximately 150 meters, a time window from 10:00 to 10:15, and uplink 50Mbps service requirements. The low-altitude network control system retrieves the operating parameters of 64 transmit and 64 receive AAUs from three Sub-6G 5G base stations along the route, reads the mechanical downtilt status, carrier frequency band, active antenna array configuration, and current beam configuration, and loads the air-to-ground dual-beam coverage model. In the coverage assessment stage, when the air-to-ground beam is in the maximum available uptilt state, the reference signal received power and signal-to-interference-plus-noise ratio are calculated point by point. If the signal-to-interference-plus-noise ratio is lower than the 10dB service threshold in the route section from 3.2 km to 3.7 km due to building obstruction, then this continuous section is identified as a residual blind zone. The enhanced control loop matches nearby 26GHz millimeter-wave micro-stations, generating a blind spot enhancement strategy with an activation window from 9:59:30 to 10:16:00. It directs the vertical uptilt beam towards the remaining blind area and the horizontal beam towards the locked flight path corridor. Simultaneously, a 5G base station is configured as the primary node and the millimeter-wave micro-station as the secondary node. After 10:16:00, when a mission completion notification or drone registration signal triggers a fallback, the fallback control loop releases the millimeter-wave micro-station's user plane bearer, putting the micro-station into hibernation. The three AAUs reclaim their air beam weights, and the network reverts to its normal ground-priority coverage mode.

[0048] Please see Figure 1 and Figure 5 This related embodiment provides a task-driven network dynamic enhancement and rollback system for carrying and executing the aforementioned method embodiments. The system includes a task access module, a model invocation module, a coverage evaluation module, an enhancement control module, and a rollback control module. The task access module receives low-altitude flight tasks and sends verified low-altitude flight tasks to the model invocation module. The model invocation module invokes the 5G base station engineering parameters and air-to-ground dual-beam coverage model covering the flight trajectory according to the low-altitude flight task, and sends the model status to the coverage evaluation module. The coverage evaluation module calculates the coverage quality of the flight trajectory when the air beam is in the maximum available uplift state. When the coverage quality meets the service threshold, it outputs the low-altitude enhancement strategy. When the coverage quality does not meet the service threshold, it determines the residual blind zone and outputs the blind zone determination result. The enhancement control module matches microwave or millimeter-wave blind spot filler base stations according to the blind zone determination result, generates blind spot filler enhancement strategy, and controls the 5G base station to load the air beam and controls the microwave or millimeter-wave blind spot filler base station to align with the residual blind zone. The fallback control module controls the microwave or millimeter-wave blind spot filler base station to release its bearer and go into sleep mode when the low-altitude flight task ends, and controls the 5G base station to retract or downweight the air beam.

[0049] The task access module takes task data from a government or third-party low-altitude management platform as input and outputs either triggerable or non-triggerable tasks. Triggerable tasks are output to the model invocation module, while non-triggerable tasks do not enter the enhancement control module. The model invocation module takes triggerable tasks, 5G base station parameters, and an air-to-ground dual-beam coverage model as input and outputs candidate base station model input data and the air-to-ground dual-beam model status. The coverage evaluation module takes trajectory sampling point sequences, service thresholds, and the air-to-ground dual-beam model status as input and outputs low-altitude enhancement strategies or blind spot determination results. The enhancement control module takes low-altitude enhancement strategies or blind spot determination results as input and outputs ground beam hold commands, air beam loading commands, blind spot activation commands, beam pointing commands, and dual connectivity configurations. The fallback control module takes task end notifications, service detection results after the time window ends, UAV deregistration signaling, and low-altitude enhancement mode verification results as input and outputs blind spot radio resource release commands, blind spot base station sleep commands, air beam retraction commands, or air beam power reduction commands. The data flow and control flow between each module are associated with the mission identifier, so that enhancement, blind spot filling and backoff will not be separated from the corresponding low-altitude flight mission.

[0050] In summary, the aforementioned implementation method forms a traceable closed loop through task access, model invocation, coverage assessment, enhancement control, and rollback control: external low-altitude flight missions provide input conditions, 5G base station parameters and air-to-ground dual-beam coverage models provide the basis for coverage calculation, reference signal received power and signal-to-interference-plus-noise ratio of trajectory sampling points form intermediate judgment states, low-altitude enhancement strategies or blind spot enhancement strategies form execution outputs, and task completion notifications, service detection results, or UAV deregistration signaling form the basis for rollback triggering. The aforementioned specific processes, field states, processing order, judgment conditions, parameter sources, module collaboration, and carrier inheritance relationships are used to explain the possible implementation methods of this invention and should not limit this invention to the specific embodiments listed. Without departing from the scope of the technical solutions described in this invention, any equivalent substitutions, equivalent modifications, equivalent combinations, order adjustments, module corresponding replacements, equivalent changes in field names, equivalent inheritance of execution subjects, or equivalent changes in carrier forms that can be conceived by those skilled in the art should fall within the scope of protection of this patent; however, they should not be extended to unclaimed topics, nor should the substantive correspondence of technical objects be changed through changes in reference numerals.

Claims

1. A task-driven network dynamic enhancement and rollback method, characterized in that, Includes the following steps: Obtain low-altitude flight missions approved by the government or a third-party low-altitude management platform. The low-altitude flight missions include mission identifiers, flight trajectories, altitude layers, time windows, and service quality requirements. According to the low-altitude flight mission, the 5G base station engineering parameters and air-to-ground dual-beam coverage model covering the flight trajectory are retrieved. The air-to-ground dual-beam coverage model is used to form a ground beam and an air beam by vertical phase weighting and port grouping when the mechanical pitch angle of the 5G base station remains unchanged. The air-to-ground beam is adjusted to the maximum available uplift state, and the coverage quality is calculated point by point on the flight trajectory based on the air-to-ground dual-beam coverage model. When the coverage quality meets the service threshold corresponding to the service quality requirement, a low-altitude enhancement strategy carried by the 5G base station is generated. When the coverage quality does not meet the service threshold corresponding to the service quality requirements, the corresponding segment is identified as a residual blind zone, and a microwave or millimeter wave base station is matched based on the residual blind zone to generate a blind zone enhancement strategy including activation time window, beam pointing and dual connectivity configuration. During the activation time window, the 5G base station is controlled to maintain the ground beam and load the air beam, and the microwave or millimeter wave blind spot filler base station is controlled to align with the remaining blind spot, so that the network enters the low-altitude enhancement mode based on the low-altitude flight mission. When the low-altitude flight mission is detected to be over, the microwave or millimeter-wave blind spot base station is controlled to release its bearer and enter sleep mode, and the 5G base station is controlled to retract the air beam or reduce the power of the air beam, so that the network falls back from the low-altitude enhanced mode to the daily ground priority coverage mode.

2. The task-driven network dynamic enhancement and rollback method according to claim 1, characterized in that, When acquiring the low-altitude flight mission, the system receives mission data sent by the government or a third-party low-altitude management platform through an API interface or MQTT interface. The mission data includes the mission identifier, the flight trajectory, the altitude layer, the time window, and the service quality requirements. The task identifier in the task data is verified for approval status, and the start and end times of the time window are verified. When the approval status corresponding to the mission identifier is valid and the time window meets the start and end time sequence, the low-altitude flight mission is verified as a triggerable mission. When the approval status corresponding to the mission identifier is invalid, or the time window does not meet the start and end time sequence, the network dynamic enhancement will not be triggered based on the low-altitude flight mission.

3. The task-driven network dynamic enhancement and rollback method according to claim 2, characterized in that, After verifying that the low-altitude flight mission is a triggerable mission, the processing order of the low-altitude flight mission is determined according to the start time of the time window, and the flight trajectory is matched with the coverage area of ​​the 5G base station. When the flight trajectory does not fall into the coverage area of ​​the 5G base station, the network dynamic enhancement processing for the low-altitude flight mission ends. When the flight trajectory falls into the coverage area of ​​the 5G base station, the 5G base station parameters and air-to-ground dual-beam coverage model covering the flight trajectory are retrieved according to the low-altitude flight mission.

4. The task-driven network dynamic enhancement and rollback method according to claim 3, characterized in that, When retrieving the operating parameters of the 5G base station covering the flight trajectory, the flight path segment to be evaluated is determined based on the flight trajectory, the altitude layer, and the time window. The location of the flight route segment to be evaluated is compared with the coverage area of ​​5G base stations, and 5G base stations that have coverage overlap with the flight route segment to be evaluated are selected as candidate base stations. Mechanical elevation angle, carrier frequency band, active antenna array configuration, and current beam configuration are read from the candidate base stations to form model input data corresponding to the air-to-ground dual-beam coverage model.

5. The task-driven network dynamic enhancement and rollback method according to claim 4, characterized in that, When loading the air-to-ground dual-beam coverage model, the mechanical elevation angle is kept constant according to the model input data, and the phase weighting object is determined by the arrangement relationship of the vertical radiating elements in the active antenna array configuration. The phase weighting objects are respectively configured with downtilt weights for forming the ground beam and uptilt weights for forming the air beam; The downtilt weights and uptilt weights are loaded according to the existing beam configuration and port grouping relationship, so that the 5G base station forms the ground beam and the air beam within the same coverage assessment period.

6. The task-driven network dynamic enhancement and rollback method according to claim 5, characterized in that, When calculating the coverage quality point by point on the flight trajectory, trajectory sampling points are set according to the flight route segment to be evaluated, and the altitude layer is used as the vertical position input of the trajectory sampling points; Based on the air-to-ground dual-beam coverage model, the reference signal received power and signal-to-interference-plus-noise ratio of the trajectory sampling points are calculated respectively when the air beam is in the maximum available uplift state. The reference signal received power and the signal-to-interference-plus-noise ratio are compared with the service threshold corresponding to the service quality requirements; When all the trajectory sampling points meet the service threshold, a low-altitude enhancement strategy carried by the 5G base station is generated. When at least one of the trajectory sampling points does not meet the service threshold, the continuous segment including the trajectory sampling points that do not meet the service threshold is determined as a residual blind zone.

7. The task-driven network dynamic enhancement and rollback method according to claim 6, characterized in that, When matching microwave or millimeter-wave base stations to fill blind spots based on the residual blind spots, the flight path segment, altitude layer, and service quality requirements corresponding to the residual blind spots are determined. The flight path segment is matched with the coverage direction and available frequency band of the candidate fill-in base station, and the candidate fill-in base station whose coverage direction points to the flight path segment and whose available frequency band meets the service quality requirements is selected as the microwave or millimeter wave fill-in base station. The activation time window is generated based on the time window, and the beam pointing and dual connectivity configuration are generated based on the flight path segment to form the blind spot enhancement strategy.

8. The task-driven network dynamic enhancement and rollback method according to claim 7, characterized in that, When the blind spot enhancement strategy is executed within the activation time window, a ground beam hold command and an air beam loading command are sent to the 5G base station, and a blind spot activation command and a beam pointing command are sent to the microwave or millimeter wave blind spot base station. The 5G base station maintains the ground beam according to the ground beam holding instruction and loads the air beam according to the air beam loading instruction; The microwave or millimeter-wave blind spot filling base station enters the working state according to the blind spot filling activation command, and aligns with the remaining blind spot according to the beam pointing command; When the 5G base station and the microwave or millimeter-wave blind spot base station complete the dual-connection configuration, the network enters the low-altitude enhancement mode based on the low-altitude flight mission.

9. The task-driven network dynamic enhancement and rollback method according to claim 8, characterized in that, When the low-altitude flight mission is detected to have ended, a rollback trigger result is generated based on the mission end notification, the business detection result after the end of the time window, or the UAV registration signaling. When the backoff trigger result is met, the microwave or millimeter-wave blind spot base station is controlled to stop providing user plane bearers to the remaining blind area and release the blind spot radio resources corresponding to the low-altitude flight mission; After the missing wireless resources are released, the microwave or millimeter-wave missing base station is controlled to enter a sleep state, and the 5G base station is controlled to retract the air beam or reduce the power of the air beam. After the air beam completes its retraction or power reduction process, the network reverts from the low-altitude enhancement mode to the routine ground-priority coverage mode.

10. A task-driven network dynamic enhancement and fallback system, providing support for performing the method according to any one of claims 1 to 9, characterized in that, It includes a task access module, a model invocation module, a coverage evaluation module, an enhancement control module, and a rollback control module; The task access module is used to receive low-altitude flight tasks and send the low-altitude flight tasks to the model invocation module; The model calling module is used to call the 5G base station engineering parameters and air-to-ground dual-beam coverage model covering the flight trajectory according to the low-altitude flight mission, and send the air-to-ground dual-beam coverage model to the coverage evaluation module. The coverage assessment module is used to calculate the coverage quality of the flight trajectory when the air-to-air beam is in the maximum available uplift state. When the coverage quality meets the service threshold, it outputs the low-altitude enhancement strategy. When the coverage quality does not meet the service threshold, it determines the residual blind zone and outputs the blind zone determination result. The enhancement control module is used to match microwave or millimeter-wave blind spot filling base stations according to the blind spot determination result, generate blind spot filling enhancement strategy, control the 5G base station to load the air beam and control the microwave or millimeter-wave blind spot filling base station to align with the remaining blind spot; The backoff control module is used to control the microwave or millimeter-wave blind spot base station to release its bearer and go into hibernation when the low-altitude flight mission ends, and to control the 5G base station to retract or downweight the air beam.

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