Unmanned aerial vehicle communication bandwidth adaptive adjustment method and system

Abstract

The invention relates to an unmanned aerial vehicle communication bandwidth adaptive adjustment method and system. The method comprises the following steps: dividing a communication channel in front of an unmanned aerial vehicle and a control terminal into a fixed bandwidth channel and a variable bandwidth channel; configuring n bandwidths from low to high for the variable bandwidth channels, and setting a bandwidth switching distance threshold value corresponding to the bandwidth of each variable bandwidth channel; determining the position of the unmanned aerial vehicle at the communication starting moment between the unmanned aerial vehicle and the control terminal and the initial bandwidth of the variable bandwidth channel; and dynamically adjusting the current bandwidth according to the current distance between the unmanned aerial vehicle and the control terminal and the bandwidth switching distance threshold of the bandwidth of the variable bandwidth channel. According to the invention, the channel bandwidth is divided into a low-bandwidth fixed channel and a variable-bandwidth channel, and bandwidth switching is further carried out by adopting a variable-bandwidth switching mode, so that stable and efficient signal transmission between the unmanned aerial vehicle and the control terminal is ensured.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a method and system for adaptive adjustment of UAV communication bandwidth. Background Technology

[0002] In existing technologies, communication between drones and control terminals (such as remote controllers and ground stations) is usually based on a fixed bandwidth. However, since the environment in which drones operate needs to change frequently, factors such as obstacles and changes in the distance between the drone and the ground control terminal can cause changes in the strength of the transmission signal between the drone and the ground control terminal. For example, when the distance between the drone and the ground control terminal increases, if communication is still based on a fixed bandwidth, the communication signal will become weaker and the communication delay will increase, which may lead to situations such as drone loss of control and cannot meet the diverse usage needs of drones in various scenarios. Summary of the Invention

[0003] The purpose of this invention is to provide a method and system for adaptive adjustment of communication bandwidth for unmanned aerial vehicles (UAVs). This method divides the channel bandwidth into a low-bandwidth fixed path and a variable-bandwidth channel, and further employs a variable-bandwidth switching method to switch the bandwidth, thereby ensuring stable and efficient signal transmission between the UAV and the control terminal.

[0004] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions.

[0005] On the one hand, an adaptive adjustment method for UAV communication bandwidth is provided, which includes the following steps:

[0006] The communication channel between the drone and the control terminal is divided into a fixed bandwidth channel and a variable bandwidth channel. The variable bandwidth channel includes the channel through which the drone sends video data to the control terminal.

[0007] Configure n bandwidths from low to high for the variable bandwidth channel, and set a bandwidth switching distance threshold corresponding to the bandwidth of each variable bandwidth channel;

[0008] Determine the drone's position at the moment communication between the drone and the control terminal begins, as well as the initial bandwidth (BW) of the variable bandwidth channel. initial ;

[0009] Based on the current distance H between the drone and the control terminal real And the bandwidth switching distance threshold for the variable bandwidth channel, for the current bandwidth BW of the variable bandwidth channel. real Dynamic adjustments are made.

[0010] On the other hand, an adaptive adjustment system for UAV communication bandwidth is also provided, which includes:

[0011] The bandwidth configuration module is used to divide the communication channel between the UAV and the control terminal into a fixed bandwidth channel and a variable bandwidth channel, and to configure n bandwidths from low to high for the variable bandwidth channel, and to set a bandwidth switching distance threshold corresponding to the bandwidth of each variable bandwidth channel.

[0012] A drone positioning module, which is mounted on the drone, determines the drone's position at the moment when communication between the drone and the control terminal begins;

[0013] The initial bandwidth acquisition module is used to determine the initial bandwidth (BW) of the variable bandwidth channel at the moment when communication between the UAV and the control terminal begins. initial ;

[0014] And, a bandwidth adjustment module, which is used to adjust the bandwidth based on the current distance H between the UAV and the control terminal. real And based on the current distance H real and the bandwidth switching distance threshold for the variable bandwidth channel, for the current bandwidth BW of the variable bandwidth channel. real Dynamic adjustments are made.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] This invention divides the channel bandwidth into a low-bandwidth fixed path and a variable-bandwidth channel. Furthermore, when the UAV sends video data to the control terminal, it uses a variable-bandwidth switching method to switch the bandwidth. This ensures that a larger bitstream is transmitted with high bandwidth in short-distance communication, while reducing the bandwidth in long-distance communication ensures the stability of long-distance data transmission. At the same time, it ensures the smoothness of bandwidth switching based on the bandwidth distance threshold, thus ensuring stable and efficient signal transmission between the UAV and the control terminal. Attached Figure Description

[0017] Figure 1 This is a flowchart of the steps in the UAV communication bandwidth adaptive adjustment method of the present invention;

[0018] Figure 2 This is a schematic diagram of the UAV communication bandwidth adaptive adjustment system in this invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0020] Example 1:

[0021] like Figure 1 As shown, this embodiment provides a method for adaptive adjustment of UAV communication bandwidth, which includes the following steps:

[0022] S1. Divide the communication channel between the UAV and the control terminal into a fixed bandwidth channel and a variable bandwidth channel.

[0023] The fixed bandwidth channel includes all channels through which the control terminal sends signals to the UAV, as well as channels through which the UAV sends non-video data (such as broadcast information, UAV flight status information, etc.) to the control terminal. The variable bandwidth channel includes channels through which the UAV sends video data to the control terminal. The control terminal includes UAV control equipment such as remote controllers and ground stations.

[0024] Furthermore, the fixed bandwidth channels are configured with a fixed bandwidth BW0 (e.g., 1.4M), meaning all fixed bandwidth channels communicate using the same fixed bandwidth BW0; and the variable bandwidth channels are configured with n bandwidths BW1, BW2, ..., BW from low to high. n Such as 3M, 5M, ..., 15M, etc., and all bandwidths of the variable bandwidth channel are greater than the fixed bandwidth BW0;

[0025] At the same time, a bandwidth switching distance threshold is set for each variable bandwidth channel bandwidth, and each bandwidth switching distance threshold includes an upward switching bandwidth distance threshold U and a downward switching bandwidth distance threshold D.

[0026] Furthermore, all upward switching bandwidth distance thresholds U decrease as bandwidth increases, all downward switching bandwidth distance thresholds D decrease as bandwidth increases, and the downward switching bandwidth distance threshold D corresponding to the same variable bandwidth channel bandwidth is greater than the upward switching bandwidth distance threshold U.

[0027] For example, in this embodiment, if the variable bandwidth channel is configured with four bandwidths BW1, BW2, BW3, and BW4 from low to high, and BW1, BW2, BW3, and BW4 are 3M, 5M, 10M, and 15M respectively, and the upward switching bandwidth distance thresholds of BW1, BW2, BW3, and BW4 are denoted as U1, U2, U3, and U4 respectively, and the downward switching bandwidth distance thresholds are denoted as D1, D2, D3, and D4 respectively, then they are set to U1=4.5km, D1=8km, U2=2.5km, D2=6km, U3=1.5km, D3=3km, U4=0.5km, and D4=2km respectively;

[0028] S2. Activate the communication module between the drone and the control terminal to initiate communication between them, and determine the drone's position at the moment communication begins and the initial bandwidth BW of the variable bandwidth channel. initial ;

[0029] In this embodiment, the moment when communication between the UAV and the control terminal begins can be the moment when normal two-way communication between the UAV and the control terminal is normal, that is, when the UAV can normally send signals to the control terminal and the control terminal can normally receive the signals, and when the control terminal can normally send signals to the UAV and the UAV can normally receive the signals; for example, under normal circumstances, after both the UAV and the control terminal are powered on, normal two-way communication can begin between them, so the moment when both the UAV and the control terminal are powered on can be determined as the moment when communication begins.

[0030] The location of the drone can be obtained based on positioning modules such as GPS and Beidou. For example, the location of the drone in this embodiment can be GPS coordinates.

[0031] Furthermore, the initial bandwidth BW of the variable bandwidth channel initial Determined in the following manner:

[0032] Based on the drone's position at the moment communication between the drone and the control terminal begins, determine the initial distance H between the drone and the control terminal at the moment communication begins. initial ;

[0033] Determine the initial distance H initial The upward switching bandwidth distance threshold of the variable bandwidth channel with the smallest difference is determined, and the bandwidth corresponding to this upward switching bandwidth distance threshold is determined as the initial bandwidth BW of the variable bandwidth channel. initial ;

[0034] For example, if the initial distance H initial If the bandwidth is 4km, then the difference between it and the upward switching bandwidth distance threshold U1 (4.5km) of the variable bandwidth channel bandwidth BW1 is the smallest, which is 0.5km. Therefore, the variable bandwidth channel bandwidth BW1 is determined as the initial bandwidth BW of the variable bandwidth channel. initial ;

[0035] Alternatively, determine the initial distance H. initial The down-switching bandwidth distance threshold of the variable bandwidth channel with the smallest difference is determined, and the bandwidth corresponding to this down-switching bandwidth distance threshold is determined as the initial bandwidth BW of the variable bandwidth channel. initial ;

[0036] For example, if the initial distance H initial If the bandwidth is 6.5km, then the difference between it and the down-switching bandwidth distance threshold D2 (which is 6km) of the variable bandwidth channel bandwidth BW2 is the smallest, which is 0.5km. Therefore, the variable bandwidth channel bandwidth BW2 is determined as the initial bandwidth BW of the variable bandwidth channel. initial ;

[0037] Furthermore, if the initial distance H initialThe variable bandwidth channel with the smallest difference has at least two upward switching bandwidth distance thresholds, and the bandwidth corresponding to any one of these upward switching bandwidth distance thresholds is determined as the initial bandwidth BW of the variable bandwidth channel. initial ;

[0038] For example, if the initial distance H initial If the bandwidth is 2km, then the difference between it and the upward switching bandwidth distance thresholds U2 (2.5km) and U3 (1.5km) of the variable bandwidth channel bandwidths BW2 and BW3 is the same, and both are the minimum difference, which is 0.5km. Therefore, either the variable bandwidth channel bandwidth BW2 or BW3 is determined as the initial bandwidth BW of the variable bandwidth channel. initial ;

[0039] Similarly, if the initial distance H initial The variable bandwidth channel with the smallest difference has at least two down-switching bandwidth distance thresholds, and the bandwidth corresponding to any one of these down-switching bandwidth distance thresholds is determined as the initial bandwidth BW of the variable bandwidth channel. initial ;

[0040] For example, if the initial distance H initial If the bandwidth is 5km, then the difference between it and the down-switching bandwidth distance thresholds D1 (8km) and D4 (2km) of the variable bandwidth channel bandwidths BW1 and BW4 is the same, and both have a minimum difference of 3km. Therefore, either the variable bandwidth channel bandwidth BW1 or BW4 is determined as the initial bandwidth BW of the variable bandwidth channel. initial ;

[0041] S3. During communication between the UAV and the control terminal, the current distance H between the UAV and the control terminal is obtained in real time. real And based on the current distance H real and the bandwidth switching distance threshold for the variable bandwidth channel, for the current bandwidth BW of the variable bandwidth channel. real Dynamic adjustment involves the following steps:

[0042] If the current distance is H real ≥ Variable bandwidth channel current bandwidth BW real Downward switching bandwidth distance threshold D real And the current bandwidth BW of the variable bandwidth channel real If the bandwidth is not the minimum bandwidth of the variable bandwidth channel, then the current bandwidth BW of the variable bandwidth channel will be used. real Switch to a bandwidth smaller than the current bandwidth (BW) real The next variable bandwidth channel bandwidth; where H is the current distance H between the UAV and the control terminal. real It can still be determined based on the drone's location, and the current distance H realThe acquisition time can be based on devices such as timers. For example, the current distance H can be set via a timer. real During data acquisition, if the timer continues to operate, it will continuously and periodically collect data at the current distance H. real When the timer stops working, the current distance H will no longer be recorded. real Once the data collection is complete, the entire bandwidth switching process ends.

[0043] For example, if the initial bandwidth BW of the variable bandwidth channel is determined at time t. initial If the variable bandwidth channel bandwidth is BW3, then the variable bandwidth channel bandwidth BW3 is the current bandwidth BW of the variable bandwidth channel. real Its downward switching bandwidth distance threshold D3 is D real That is, 3km;

[0044] At time t+1, the current distance H between the drone and the control terminal is... real If the current bandwidth is 3.5km (>D3 (3km)), then the variable bandwidth channel current bandwidth BW will be... real (That is, BW1) switches to a bandwidth smaller than the current BW. real The next variable bandwidth channel bandwidth, i.e., switching to variable bandwidth channel bandwidth BW2;

[0045] If the current distance is H real ≥ Variable bandwidth channel current bandwidth BW real Downward switching bandwidth distance threshold D real And the current bandwidth BW of the variable bandwidth channel real When the minimum bandwidth of the variable bandwidth channel is reached, the current bandwidth BW of the variable bandwidth channel is maintained. real No change, no bandwidth switching required;

[0046] For example, if the initial bandwidth BW of the variable bandwidth channel is determined at time t. initial The variable bandwidth channel bandwidth BW1 is the current bandwidth BW of the variable bandwidth channel. real That is, the minimum bandwidth BW1 of the variable bandwidth channel, if H at time t+1 real If ≥D1, then maintain the current bandwidth BW. real (i.e., BW1) remains unchanged, and no bandwidth switching is required;

[0047] If the current distance is H real <Variable bandwidth channel current bandwidth BW real Downward switching bandwidth distance threshold D real And the current distance H real <Variable bandwidth channel current bandwidth BW real Upward switching bandwidth distance threshold U real And, the current bandwidth BW of the variable bandwidth channel.real If the bandwidth is not the maximum bandwidth of the variable bandwidth channel, then the current bandwidth BW of the variable bandwidth channel will be used. real Switch to a bandwidth greater than the current bandwidth (BW) real The bandwidth of the previous variable bandwidth channel;

[0048] For example, if the current bandwidth BW of the variable bandwidth channel at time t real For BW2, its downward switching bandwidth distance threshold D2 and upward switching bandwidth distance threshold U2 are respectively D real (i.e., 6km), U real (i.e., 2.5km);

[0049] At time t+1, the current distance H between the drone and the control terminal is... real It is 2.0 km, which is also less than D. real U real Then the current bandwidth BW of the variable bandwidth channel will be... real (That is, BW2) switches to a BW with a bandwidth greater than the current bandwidth. real The previous variable bandwidth channel bandwidth, i.e., variable bandwidth channel bandwidth BW3;

[0050] If the current distance is H real <Variable bandwidth channel current bandwidth BW real Downward switching bandwidth distance threshold D real And the current distance H real <Variable bandwidth channel current bandwidth BW real Upward switching bandwidth distance threshold U real And, the current bandwidth BW of the variable bandwidth channel. real When the bandwidth is the maximum bandwidth of the variable bandwidth channel, the current bandwidth BW of the variable bandwidth channel is maintained. real No change, no bandwidth switching required;

[0051] For example, if the current bandwidth BW of the variable bandwidth channel at time t real Given BW4 (the maximum bandwidth of the variable bandwidth channel), if at time t+1, the current distance H between the UAV and the control terminal is... real At the same time, it is less than D. real (i.e., D4), U real (i.e., U4), then maintain the current bandwidth BW. real (i.e., BW4) remains unchanged, and no bandwidth switching is required;

[0052] If the current bandwidth of the variable bandwidth channel is BW real Upward switching bandwidth distance threshold U real ≤ Current distance H real ≤ Variable bandwidth channel current bandwidth BW real Downward switching bandwidth distance threshold Dreal And maintain the current bandwidth BW of the variable bandwidth channel. real constant;

[0053] For example, if the current bandwidth BW of the variable bandwidth channel at time t real For BW2, its downward switching bandwidth distance threshold D2 and upward switching bandwidth distance threshold U2 are respectively D real (i.e., 6km), U real (i.e., 2.5km);

[0054] At time t+1, the current distance H between the drone and the control terminal is... real It is 5.0 km, which is less than D. real At the same time, greater than U real Then maintain the current bandwidth BW of the variable bandwidth channel. real (That is, BW2) remains unchanged, and there is no need to switch bandwidth.

[0055] Therefore, in this embodiment, the channel bandwidth is divided into a low-bandwidth fixed path and a variable bandwidth channel based on the communication data characteristics between the control terminal and the UAV. Furthermore, based on the characteristics that the amount of data sent from the control terminal to the UAV is small, but the anti-interference requirements are high, a fixed low bandwidth is selected to ensure the reliability of data transmission.

[0056] The video data sent by the drone to the control terminal has high data traffic and high anti-interference requirements. Therefore, a variable bandwidth switching method is used to switch bandwidth to ensure communication at short distances (i.e., the current distance H). real At the same time, it is less than D. real U real In cases where high bandwidth is used to transmit a larger bitstream, in long-distance situations (i.e., H...), a larger bitstream is transmitted. real Greater than or equal to D real The following measures ensure the stability of long-distance data transmission by reducing bandwidth, while ensuring the smoothness of bandwidth switching based on bandwidth distance thresholds, thus ensuring stable and efficient signal transmission between drones and control terminals.

[0057] Example 2:

[0058] This embodiment provides an adaptive adjustment system for UAV communication bandwidth, which can implement the adaptive adjustment method for UAV communication bandwidth described in Embodiment 1, such as... Figure 2 As shown, the UAV communication bandwidth adaptive adjustment system includes:

[0059] The bandwidth configuration module 1 is used to divide the communication channel between the UAV and the control terminal into a fixed bandwidth channel and a variable bandwidth channel, and to configure a fixed bandwidth BW0 for the fixed bandwidth channel, and to configure n bandwidths BW1, BW2, ..., BWn from low to high for the variable bandwidth channel, and to set a bandwidth switching distance threshold corresponding to the bandwidth of each variable bandwidth channel.

[0060] The drone positioning module 2 is mounted on the drone and determines the drone's position at the moment when communication between the drone and the control terminal begins.

[0061] Initial bandwidth acquisition module 3 is used to determine the initial bandwidth BW of the variable bandwidth channel at the moment when communication between the UAV and the control terminal begins. initial ;

[0062] And, bandwidth adjustment module 4, which is used to obtain the current distance H between the UAV and the control terminal in real time during the communication process between the UAV and the control terminal. real And based on the current distance H real and the bandwidth switching distance threshold for the variable bandwidth channel, for the current bandwidth BW of the variable bandwidth channel. real Dynamic adjustment is performed, and the process is the same as step S3.

[0063] In summary, this invention divides the channel bandwidth into a low-bandwidth fixed path and a variable-bandwidth channel based on the communication data characteristics between the control terminal and the UAV. Furthermore, when the UAV sends video data to the control terminal, a variable bandwidth switching method is used to switch the bandwidth. This ensures that a larger bitstream is transmitted with high bandwidth in short-distance communication, while reducing the bandwidth in long-distance communication ensures the stability of long-distance data transmission. At the same time, the smoothness of bandwidth switching is ensured according to the bandwidth distance threshold, thus ensuring stable and efficient signal transmission between the UAV and the control terminal.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for adaptive adjustment of communication bandwidth for unmanned aerial vehicles (UAVs), characterized in that, Includes the following steps: The communication channel between the drone and the control terminal is divided into a fixed bandwidth channel and a variable bandwidth channel. The variable bandwidth channel includes the channel through which the drone sends video data to the control terminal. Configure n bandwidths from low to high for the variable bandwidth channel, and set a bandwidth switching distance threshold corresponding to the bandwidth of each variable bandwidth channel; Determine the drone's position at the moment communication between the drone and the control terminal begins, as well as the initial bandwidth (BW) of the variable bandwidth channel. initial ; Based on the current distance H between the drone and the control terminal real And the bandwidth switching distance threshold for the variable bandwidth channel, for the current bandwidth BW of the variable bandwidth channel. real Dynamic adjustments are made.

2. The UAV communication bandwidth adaptive adjustment method as described in claim 1, characterized in that, Each bandwidth switching distance threshold includes an upward switching bandwidth distance threshold and a downward switching bandwidth distance threshold; Furthermore, all upward switching bandwidth distance thresholds decrease as bandwidth increases, all downward switching bandwidth distance thresholds decrease as bandwidth increases, and the downward switching bandwidth distance thresholds corresponding to the same variable bandwidth channel bandwidth are all greater than the upward switching bandwidth distance thresholds.

3. The UAV communication bandwidth adaptive adjustment method as described in claim 1, characterized in that, The fixed bandwidth channel is configured with a fixed bandwidth, and all bandwidths of the variable bandwidth channel are greater than the fixed bandwidth.

4. The UAV communication bandwidth adaptive adjustment method as described in claim 1, characterized in that, The initial bandwidth BW of the variable bandwidth channel initial Determined in the following manner: Based on the drone's position at the moment communication between the drone and the control terminal begins, determine the initial distance H between the drone and the control terminal at the moment communication begins. initial ; Determine the initial distance H initial The upward switching bandwidth distance threshold of the variable bandwidth channel with the smallest difference is determined, and the bandwidth corresponding to this upward switching bandwidth distance threshold is determined as the initial bandwidth BW of the variable bandwidth channel. initial ; Alternatively, determine the initial distance H. initial The down-switching bandwidth distance threshold of the variable bandwidth channel with the smallest difference is determined, and the bandwidth corresponding to this down-switching bandwidth distance threshold is determined as the initial bandwidth BW of the variable bandwidth channel. initial .

5. The UAV communication bandwidth adaptive adjustment method as described in claim 1, characterized in that, Based on the current distance H between the drone and the control terminal real And the bandwidth switching distance threshold for the variable bandwidth channel, for the current bandwidth BW of the variable bandwidth channel. real Dynamic adjustment includes the following steps: If the current distance is H real ≥ Variable bandwidth channel current bandwidth BW real Downward switching bandwidth distance threshold D real And the current bandwidth BW of the variable bandwidth channel real If the bandwidth is not the minimum bandwidth of the variable bandwidth channel, then the current bandwidth BW of the variable bandwidth channel will be used. real Switch to a bandwidth smaller than the current bandwidth (BW) real The next variable bandwidth channel bandwidth.

6. The UAV communication bandwidth adaptive adjustment method as described in claim 5, characterized in that, If the current distance is H real ≥ Variable bandwidth channel current bandwidth BW real Downward switching bandwidth distance threshold D real And the current bandwidth BW of the variable bandwidth channel real When the minimum bandwidth of the variable bandwidth channel is reached, the current bandwidth BW of the variable bandwidth channel is maintained. real constant.

7. The UAV communication bandwidth adaptive adjustment method as described in claim 1, characterized in that, Based on the current distance H between the drone and the control terminal real And the bandwidth switching distance threshold for the variable bandwidth channel, for the current bandwidth BW of the variable bandwidth channel. real Dynamic adjustment includes the following steps: If the current distance is H real <Variable bandwidth channel current bandwidth BW real Downward switching bandwidth distance threshold D real And the current distance H real <Variable bandwidth channel current bandwidth BW real Upward switching bandwidth distance threshold U real And, the current bandwidth BW of the variable bandwidth channel. real If the bandwidth is not the maximum bandwidth of the variable bandwidth channel, then the current bandwidth BW of the variable bandwidth channel will be used. real Switch to a bandwidth greater than the current bandwidth (BW) real The bandwidth of the previous variable bandwidth channel.

8. The UAV communication bandwidth adaptive adjustment method as described in claim 7, characterized in that, If the current distance is H real <Variable bandwidth channel current bandwidth BW real Downward switching bandwidth distance threshold D real And the current distance H real <Variable bandwidth channel current bandwidth BW real Upward switching bandwidth distance threshold U real And, the current bandwidth BW of the variable bandwidth channel. real When the bandwidth is the maximum bandwidth of the variable bandwidth channel, the current bandwidth BW of the variable bandwidth channel is maintained. real constant.

9. The UAV communication bandwidth adaptive adjustment method as described in claim 1, characterized in that, Based on the current distance H between the drone and the control terminal real And the bandwidth switching distance threshold for the variable bandwidth channel, for the current bandwidth BW of the variable bandwidth channel. real Dynamic adjustment includes the following steps: If the current bandwidth of the variable bandwidth channel is BW real Upward switching bandwidth distance threshold U real ≤ Current distance H real ≤ Variable bandwidth Current channel bandwidth BW real Downward switching bandwidth distance threshold D real And maintain the current bandwidth BW of the variable bandwidth channel. real constant.

10. A UAV communication bandwidth adaptive adjustment system, characterized in that, include: The bandwidth configuration module is used to divide the communication channel between the UAV and the control terminal into a fixed bandwidth channel and a variable bandwidth channel, and to configure n bandwidths from low to high for the variable bandwidth channel, and to set a bandwidth switching distance threshold corresponding to the bandwidth of each variable bandwidth channel. A drone positioning module, which is mounted on the drone, determines the drone's position at the moment when communication between the drone and the control terminal begins; The initial bandwidth acquisition module is used to determine the initial bandwidth (BW) of the variable bandwidth channel at the moment when communication between the UAV and the control terminal begins. initial ; And, a bandwidth adjustment module, which is used to adjust the bandwidth based on the current distance H between the UAV and the control terminal. real And based on the current distance H real And the bandwidth switching distance threshold for the variable bandwidth channel, for the current bandwidth BW of the variable bandwidth channel. real Dynamic adjustments are made.

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