CN115426437A - Graph transmission control method, device and system, modem and aircraft - Google Patents
Graph transmission control method, device and system, modem and aircraft Download PDFInfo
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00095—Systems or arrangements for the transmission of the picture signal
- H04N1/00103—Systems or arrangements for the transmission of the picture signal specially adapted for radio transmission, e.g. via satellites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64B—LIGHTER-THAN AIR AIRCRAFT
- B64B1/00—Lighter-than-air aircraft
- B64B1/06—Rigid airships; Semi-rigid airships
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/04—Helicopters
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- B64C—AEROPLANES; HELICOPTERS
- B64C33/00—Ornithopters
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- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C39/00—Aircraft not otherwise provided for
- B64C39/02—Aircraft not otherwise provided for characterised by special use
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
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Abstract
The embodiment of the invention relates to the technical field of aerial photography and discloses a method, a device, a system, a modem and an aircraft for image transmission control.
Description
Technical Field
The embodiment of the invention relates to the technical field of aerial photography, in particular to a method, a device and a system for controlling image transmission, a modem and an aircraft.
Background
With the wider application of the aircraft, various requirements of the aircraft, such as long endurance, long distance, miniaturization and the like, are increased, and the comprehensive requirements on the image transmission performance and the power consumption are increased.
Currently, the main problems that limit the overall performance of an aircraft are: in the prior art, when the aircraft graph transmission is realized, a full scheduling mode is usually adopted, so that the scheduling complexity can be reduced, the requirement of high-definition transmission on large data volume can be met, and the power consumption is relatively high; in order to increase the remote control distance, the transmission power is generally increased, and the power consumption is also increased by adding a transmitting antenna; the circuit board is small in size for meeting miniaturization requirements, so that heat dissipation is insufficient, and the risk of breakdown caused by overhigh temperature is easily caused.
In the process of implementing the embodiment of the present invention, the inventor finds that it is difficult to consider both long-distance and low-power consumption mapping in the above related art, and after designing a heat dissipation structure, the design is limited to the miniaturization of an aircraft.
Disclosure of Invention
The embodiment of the application provides a method, a device and a system for controlling image transmission, a modem and an aircraft, which can realize remote low-power-consumption image transmission through software control.
The purpose of the embodiment of the invention is realized by the following technical scheme:
in order to solve the technical problem, in a first aspect, an embodiment of the present invention provides a map-based control method applied to an aircraft, where the method includes: setting a frame structure and a transmission bandwidth of image data according to the current channel quality; setting a channel and transmitting power for transmitting the image according to the current transmission requirement on the image; and packing the image data according to the frame structure and the transmission bandwidth, and sending the image data through the channel and the transmission power.
In some embodiments, before the setting of the frame structure and the transmission bandwidth of the image data according to the current channel quality, the method further comprises: switching the aircraft to an initial state and searching for a remote control signal of a remote controller; and after searching the remote control signal, opening a default channel so that the aircraft establishes communication connection with the remote controller.
In some embodiments, the channel for transmitting the image includes two channels, the two channels are respectively connected to two antennas, and the initial state is a state where neither channel is opened.
In some embodiments, said opening a default channel comprises: acquiring comprehensive evaluation values of the receiving power and/or the signal-to-noise ratio of the two antennas; an antenna with a high integrated evaluation value is used as a transmitting antenna and a channel connected to the transmitting antenna is opened.
In some embodiments, before the setting of the initial state of the aircraft and searching for remote control signals, the method further comprises: and controlling the aircraft to be powered on and started.
In some embodiments, the setting of the frame structure and the transmission bandwidth of the image data according to the current channel quality includes: detecting the transmission rate and/or the signal-to-noise ratio of the current channel; setting a frame structure of image data according to the transmission rate and/or the signal-to-noise ratio of the current channel; and setting the transmission bandwidth of the image data according to the frame structure.
In some embodiments, the uplink subframe duty cycle of the frame structure is inversely related to the transmission bandwidth, the method further comprising: when the aircraft only works with a single antenna, judging whether the index value of the transmission rate of the current channel is lower than a preset index value; if so, the duty cycle of the uplink subframe in the frame structure is reduced and/or the transmission bandwidth is increased.
In some embodiments, the setting of the channel and the transmission power for transmitting the image according to the current transmission requirement for the image includes: setting the transmitting power of the single antenna according to the adjusted frame structure and transmission bandwidth; judging whether the transmitting power of the single antenna reaches the maximum transmitting power; if yes, increasing the number of the opened channels so as to increase the number of the antennas for the aircraft to work, and/or opening the antenna channels with high comprehensive evaluation values.
In order to solve the above technical problem, in a second aspect, an embodiment of the present invention provides a map-based control apparatus for an aircraft, where the apparatus includes: a first setting unit for setting a frame structure and a transmission bandwidth of the image data according to the current channel quality; the second setting unit is used for setting a channel and transmitting power for transmitting the image according to the current transmission requirement on the image; and the sending unit is used for packing the image data according to the frame structure and the transmission bandwidth and sending the image data through the channel and the transmitting power.
To solve the above technical problem, in a third aspect, an embodiment of the present invention provides a modem, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of the first aspect as described above.
In order to solve the above technical problem, in a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the method according to the first aspect.
In order to solve the above technical problem, in a fifth aspect, the present invention further provides a computer program product, which includes a computer program stored on a computer-readable storage medium, the computer program including program instructions, which, when executed by a computer, cause the computer to execute the method according to the first aspect.
In order to solve the above technical problem, in a sixth aspect, an embodiment of the present invention further provides an aircraft, including: a radio frequency front end module comprising two radio frequency antennas; the transmission dual ports of the radio transceiver are respectively connected to the two radio frequency antennas through two radio frequency front end channels of the radio frequency front end module; the modem according to the third aspect is connected to the transceiver through a clock line and a data line, and the rf control port of the modem is connected to the rf front-end module.
To solve the foregoing technical problem, in a seventh aspect, an embodiment of the present invention further provides a graph transmission control system, including: a remote control, and an aircraft as in the sixth aspect.
Compared with the prior art, the invention has the beneficial effects that: different from the situation of the prior art, the embodiment of the invention provides an image transmission control method, an apparatus, a system, a modem and an aircraft, wherein the modem in the aircraft can set a frame structure and a transmission bandwidth of image data according to the current channel quality in a software control mode, set a channel and transmission power for transmitting an image according to the current transmission requirement on the image, package the image data according to the frame structure and the transmission bandwidth, and transmit the image data through the channel and the transmission power, and through dynamic adjustment of the frame structure, the transmission bandwidth, the channel and the transmission power, low-power-consumption image transmission can be realized in the flight process of the aircraft, and long-distance stable image transmission can be considered.
Drawings
The embodiments are illustrated by the figures of the accompanying drawings which correspond and are not meant to limit the embodiments, in which elements/modules and steps having the same reference number designation may be referred to by similar elements/modules and steps, unless otherwise indicated, and in which the drawings are not to scale.
Fig. 1 is a schematic diagram of an application environment of a graph transmission control method provided by an embodiment of the present invention;
fig. 2 is a schematic flowchart of a graph transmission control method according to an embodiment of the present invention;
FIG. 3 is a schematic view of a sub-flow of step S10 of the graph transmission control method shown in FIG. 2;
fig. 4 is a frame example of a switchable frame structure provided in an embodiment of the present invention;
fig. 5 is an example of a switchable operating state provided by the first embodiment of the present invention;
FIG. 6 is a schematic sub-flow chart of step S20 of the map control method shown in FIG. 2;
FIG. 7 is a flowchart illustrating another graph transmission control method according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a graph transmission control device according to a second embodiment of the present invention;
fig. 9 is a schematic structural diagram of another graph-based control device according to a second embodiment of the present invention;
fig. 10 is a schematic diagram of a hardware structure of a modem according to a third embodiment of the present invention;
fig. 11 is a schematic hardware structure diagram of an aircraft according to a fourth embodiment of the present invention;
fig. 12 is a schematic structural diagram of a graph-based control system according to a fifth embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the invention.
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that, if not conflicted, the various features of the embodiments of the invention may be combined with each other within the scope of protection of the present application. Additionally, while functional block divisions are performed in apparatus schematics, with logical sequences shown in flowcharts, in some cases the illustrated or described steps may be performed out of order within the apparatus, or within the flowcharts. Further, the terms "first," "second," "third," and the like, as used herein do not limit the order of data and execution, but merely distinguish between identical or similar items that have substantially the same function or effect. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The current existing graph-based control technology generally has the following problems: the point-to-point aircraft graph transmission generally adopts an Orthogonal Frequency Division Multiplexing (OFDM) technology, carries out resource scheduling according to a certain frame structure, generally adopts a full scheduling mode, reduces the complexity of Frequency selective scheduling, meets the requirement of high-definition image transmission on large data volume, and has relatively high power consumption; in order to increase the remote control distance, point-to-point aircraft mapping generally adopts a mode of increasing the transmitting power and increasing the transmitting antenna, but the power consumption is correspondingly increased; in order to meet the requirement of miniaturization, the circuit board is correspondingly reduced, so that insufficient heat dissipation can be caused, and some types of aircraft even cancel a heat dissipation fan based on the effect of the fan in the flight of the aircraft, so that higher requirements are provided for heat dissipation of devices, and particularly in the ground takeoff stage, the risk of breakdown caused by overhigh temperature is easily caused when the heat dissipation is insufficient.
For the above problems, the existing remote low-power-consumption graph transmission technology is mainly improved from the following three directions, and accordingly, certain new problems exist:
1. for a hardware circuit, only 1 path of transmitting path is selected to realize low power consumption, specifically, a high-Power Amplifier (PA) is used, and an antenna selection function is adopted. For this direction, the problems that the type selection difficulty of a high-power amplifier is high, the integration level of the high-power amplifier is relatively low, the quiescent current is relatively high, and the processing requirement on the antenna selection algorithm in the image transmission performance is high exist.
2. In the power control processing of software, a simple and extensive way is to adopt sectional control (such as a 2-section mode) to realize low power consumption, adopt 14dBm power emission at a short distance and adopt maximum power allowed by regulations, such as 23dBm, at a long distance. For the direction, the problem that the control mode is extensive and single and cannot achieve a good low-power consumption effect exists; and if the control mode is further improved to a complex and fine mode, specifically, an open-loop power control or closed-loop power control mode is adopted, the most appropriate transmitting power can be calculated in real time, however, the action of the method is mainly embodied in a long-distance scene, and the action of the method is not great in a short-distance scene due to the existence of static current of a device.
3. The heat dissipation structure is designed to achieve low power consumption, for example, the heat dissipation area of the circuit board is increased, and the heat dissipation fan is increased. For this direction, there is a problem that the volume of the aircraft is increased accordingly, limiting the miniaturization of the design.
In order to solve the above problem, an embodiment of the present invention provides a remote low-power-consumption image transmission control scheme, which achieves low-power-consumption and remote image transmission in a flight process of an aircraft through dynamic adjustment of a frame structure, a transmission bandwidth, a channel, and a transmission power, and does not need to add a heat dissipation structure, which is beneficial to miniaturization design of the aircraft/aircraft, and fig. 1 is a schematic diagram of one application environment of the image transmission control method provided in the embodiment of the present invention, where the application environment includes: the remote control system comprises an aircraft 10 and a remote controller 20, wherein the aircraft 10 is in communication connection with the remote controller 20, and the aircraft 10 can execute a map transmission control method provided by an embodiment of the invention. The communication link may be established via a wired or wireless connection, for example, via a wireless communication module, to enable image transmission of the remote control 20 with the aircraft 10.
The aircraft 10 may be any type of flying apparatus, and may include a fuselage, arms, power plants, a pan/tilt head, flight control systems, and cameras, etc., such as an Unmanned Aerial Vehicle (UAV), unmanned ship, or other mobile device, etc. The following description of the invention uses a drone as an example of an aircraft. It will be apparent to those skilled in the art that other types of aircraft may be used without limitation. Wherein, this unmanned aerial vehicle can be various types of unmanned aerial vehicle, for example, unmanned aerial vehicle can be miniature unmanned aerial vehicle. In certain embodiments, the drone may be a rotary wing vehicle (rotorcraft), for example, a multi-rotor vehicle propelled through the air by a plurality of propulsion devices, embodiments of the invention are not so limited, and the drone may be other types of drones or mobile devices, such as fixed wing drones, unmanned airships, umbrella wing drones, flapping wing drones, and the like. In some embodiments, the aircraft 10 may rotate about one or more axes of rotation. For example, the above-described rotation axes may include a roll axis, a translation axis, and a pitch axis.
The remote control 20 may be any suitable remote control device or remote control terminal. The remote controller 20 is a remote control unit on a receiving ground (ship) surface or an aerial platform, and sends a control instruction to a flight control system, namely a flight control system, so as to control the aircraft 10. The remote controller 20 is used for relaying data, information or instructions. For example, after the remote controller 20 receives data or information transmitted by the aircraft 10 (e.g., image information captured by a camera), the data or information may be transmitted to a display device, so as to display flight information of the aircraft 10 on the display device, and render or display the image information captured by the aircraft 10.
Specifically, the embodiments of the present invention will be further explained below with reference to the drawings.
Example one
An embodiment of the present invention provides a map transmission control method, which is applied to an aircraft, where the aircraft may be the aircraft 10 described in the above application scenario, please refer to fig. 2, which shows a flow of the map transmission control method provided in the embodiment of the present invention, where the method includes, but is not limited to, the following steps:
step S10: setting a frame structure and a transmission bandwidth of image data according to the current channel quality;
the applicant discovers through power consumption analysis that the power consumption of the transmission channel TX is a main power consumption ratio, and the power consumption of the radio frequency front end transmission channel TX is about 90%, so that low power consumption can be realized by adjusting the duty ratio of the uplink subframe UL in the data link layer, and a better balance between the transmission rate and the power consumption can be realized by matching with the selection of the transmission bandwidth, wherein the duty ratio of the uplink subframe of the frame structure is inversely related to the transmission bandwidth. Specifically, please refer to fig. 3, which shows a sub-flow of step S10 in the graph transmission control method shown in fig. 2, wherein the setting of the frame structure and the transmission bandwidth of the image data according to the current channel quality at least includes the following steps:
step S11: detecting the transmission rate and/or the signal-to-noise ratio of the current channel;
step S12: setting a frame structure of image data according to the transmission rate and/or the signal-to-noise ratio of the current channel;
step S13: and setting the transmission bandwidth of the image data according to the frame structure.
In the embodiment of the present invention, preferably, the channel for transmitting the image preferably includes two channels, the two channels are respectively connected to the two antennas, an initial state is a state where neither channel is opened, and a hardware structure with dual transmission paths is adopted, so that the remote low-power image transmission can be realized, and meanwhile, more combined control methods are provided, thereby ensuring the miniaturization design of the aircraft.
Based on the above, the aircraft firstly operates in a single-antenna state after being started, and when the aircraft operates only with a single antenna, whether the index value of the transmission rate of the current channel is lower than a preset index value is judged, and if so, the duty ratio of the uplink subframe in the frame structure is reduced and/or the transmission bandwidth is increased. In other embodiments, the determination may be made according to other related detection values of the transmission rate and/or related detection values of the signal-to-noise ratio, such as a combination of traffic, error code, AGC, distance, etc., and the combination of the frame structures of the time selective scheduling may be other structures with different permutations, which will not be described in detail herein.
Specifically, please refer to fig. 4 and fig. 5 together, fig. 4 illustrates a frame example of a switchable frame structure provided by an embodiment of the present invention, where D is a Downlink subframe, which represents a Downlink subframe, that is, a data frame transmitted from the remote controller to the aircraft, and U is an Uplink subframe, which represents an Uplink subframe, that is, a data frame transmitted from the aircraft to the remote controller; n is NoTRx indicating a blank frame not carrying data, i.e., a state of not receiving and not transmitting, wherein the duty ratio of the uplink subframe of the frame structure 1 is higher than that of the uplink subframe of the frame structure 2, and the duty ratio of the uplink subframe of the frame structure 2 is higher than that of the uplink subframe of the frame structure 3; fig. 5 shows an example of a switchable operating state provided by an embodiment of the present invention.
The aircraft is in an initial state after power-on start, then the system executes step S11 to start detecting the index value of the transmission rate of the current channel, and then executes step S12 to select a state with a different frame structure or a different transmission state according to the different index values, for example, in the example shown in fig. 5:
when the index value MCS (Modulation and Coding Scheme) of the transmission rate of the current channel is higher than a first preset index value, if MCS >24, the system executes step S12, switches to state 1, adopts a frame structure 3 with the lowest uplink subframe duty ratio, and correspondingly executes step S13 to set a larger transmission bandwidth of 20MHz for transmission according to the frame structure;
after switching to the state 1, returning to execute the step S11 to continue detecting the index value of the transmission rate of the current channel, and when the index value MCS of the transmission rate of the current channel is lower than a second preset index value, if MCS is less than 23, switching to the state 2, the system executes the step S12 to switch to the state 2, adopting the frame structure 2 with a slightly higher uplink subframe duty ratio (higher than the frame structure 3, i.e. closing the subframe 3/4/8/9 of the transmission channel TX), and correspondingly executing the step S13 to set a larger transmission bandwidth of 20MHz according to the frame structure for transmission;
after switching to the state 2, returning to execute the step S11 to continue detecting the index value of the transmission rate of the current channel, and when the index value MCS of the transmission rate of the current channel is lower than a third preset index value, if MCS is less than 18, switching to the state 3, the system executes the step S12, switching to the state 3, adopting the frame structure 1 with a high uplink subframe duty ratio (higher than the frame structure 2, i.e. closing the subframe 4/9 of the transmission channel TX), and correspondingly executing the step S13 to set a smaller transmission bandwidth of 10MHz according to the frame structure for transmission; further, if the MCS is higher than the first predetermined index value again after switching to the state 2, i.e. MCS >24, the state is switched back to the state 1.
Step S20: setting a channel and transmitting power for transmitting the image according to the current transmission requirement on the image;
in the embodiment of the present invention, after setting the frame structure and the transmission bandwidth of the image, the transmission power, the channels used for transmitting the image, and the number of channels may be set according to the current transmission state, specifically, please refer to fig. 6, which shows a sub-process of step S20 in the graph transmission control method shown in fig. 2, where the setting of the channels used for transmitting the image and the transmission power according to the current transmission requirement for the image includes:
step S21: setting the transmitting power of the single antenna according to the adjusted frame structure and transmission bandwidth;
step S22: judging whether the transmitting power of the single antenna reaches the maximum transmitting power; if yes, jumping to step S23;
step S23: increasing the number of channels opened to increase the number of antennas on which the aircraft operates, and/or opening antenna channels for which the combined estimate is high.
In the embodiment of the present invention, after the frame structure and the transmission bandwidth of the image data are set according to the transmission rate and/or the signal-to-noise ratio of the current channel, a fixed transmission power is further set according to the frame structure and the transmission bandwidth of the image data, or a dynamic transmission power is set, and the value of the transmission power is detected in real time, and after the maximum transmission power is reached and the transmission power and/or the signal-to-noise ratio do not meet the requirements, the antenna with higher power is switched, or the number of the antennas is increased to meet the transmission requirements.
Specifically, under the condition of good channel conditions, that is, when the index value MCS of a higher transmission rate can be supported, part of the uplink subframes are closed to meet the requirement of the transmission rate. When the requirement for the transmission rate is not changed, the channel condition is deteriorated, and the index value MCS of the higher transmission rate cannot be supported, the uplink subframe proportion needs to be increased, so that the original transmission rate requirement is supported by the index value MCS of the lower transmission rate. For example, still taking fig. 5 as an example, in the case of state 1 and state 2, since blank frames still exist in the frame structure 2 and the frame structure 3, when the requirement for the transmission rate increases, the blank frames (subframe 3/4/8/9 in the frame structure 3, or subframe 4/9 in the frame structure 2) can be adjusted to uplink subframes, that is, the subframe duty ratio is increased, so as to support the original transmission requirement. At this time, the transmitting power adopts the highest power of the PA quiescent current to transmit data, and since the common devices can be larger than 14dBm, in order to meet the ground transmitting power required by the authentication specification of the unmanned aerial vehicle, preferably, a fixed 14dBm can be set as the transmitting power.
After the state 3 is switched, a frame structure 1 with a high uplink subframe duty ratio does not have a blank frame, a subframe of a sending channel TX only has a structure formed by an uplink subframe and a downlink subframe, the transmitting power needs to be switched to a dynamic power control mode to dynamically adjust the transmitting power according to the current transmission requirement, furthermore, after the transmitting power is detected to reach the maximum transmitting power Pmax, the state 4 is switched, and the number of antennas is increased to improve the transmission efficiency;
further, after switching to the state 3, and when the index value MCS of the transmission rate of the current channel is higher than a fourth preset index value, for example, MCS >21, and the transmission power PWR is less than or equal to 14dBm, switching back to the state 2;
further, after switching to state 4, and when the index value MCS of the transmission rate of the current channel is higher than a fourth preset index value, i.e. MCS >21, switching back to state 3.
It should be noted that, in the example shown in fig. 5, in each state, when the transmission rate of the current channel does not meet the transmission requirement, that is, the index value of the transmission rate of the current channel is lower than the preset index value, the current channel may be further switched to the antenna channel with the higher comprehensive evaluation value for transmission, where the comprehensive evaluation value is a value obtained by comprehensively evaluating the received power/signal-to-noise ratio of the two antennas.
Step S30: and packing the image data according to the frame structure and the transmission bandwidth, and sending the image data through the channel and the transmitting power.
In the embodiment of the present invention, after the data frame structure, the transmission bandwidth, the number of antenna channels and channels, and the transmission power are set in steps S10 and S20, that is, after the state is switched to the corresponding state, the image data may be packaged according to the frame structure and the transmission bandwidth, and the image data is sent through the channels and the transmission power, so as to implement image transmission.
Further, please refer to fig. 7, which illustrates another image transmission control method provided by the embodiment of the present invention, before the setting the frame structure and the transmission bandwidth of the image data according to the current channel quality, the method further includes:
step S40: controlling the aircraft to be powered on and started;
step S50: switching the aircraft to an initial state and searching for a remote control signal of a remote controller;
step S60: and after searching the remote control signal, opening a default channel so that the aircraft establishes communication connection with the remote controller.
In the embodiment of the present invention, before setting the frame structure, the transmission bandwidth, the channel, and the transmission power, it is further necessary to first control the aircraft to power on and start, search for the remote control signal of the remote controller, open one of the antenna channels after the cell is searched, that is, after the remote control signal is searched, enter the connection state, and switch to the state 1 shown in fig. 5 after detecting that the transmission rate and/or the signal-to-noise ratio satisfy the preset conditions.
Preferably, the opening of the default channel may be to open an antenna channel with higher transmission capability first, and specifically, the opening of the default channel includes: acquiring comprehensive evaluation values of the receiving power and/or the signal-to-noise ratio of the two antennas; an antenna with a high integrated evaluation value is used as a transmitting antenna and a channel connected to the transmitting antenna is opened.
According to the image transmission control method provided by the embodiment of the invention, when the transmission rate and/or the signal-to-noise ratio of the current channel cannot meet the requirements or the transmitting power of the antenna reaches the maximum power, the improvement of power consumption during image transmission in a close-range scene can be realized by selecting frame structures with different uplink subframe duty ratios, and/or switching to different transmission bandwidths, and/or opening antenna channels with different comprehensive evaluation values, and/or increasing the number of opened channels in a combined control mode, and the strong and stable performance can still be maintained during image transmission in a long-range scene.
Example two
An embodiment of the present invention provides a map-based control apparatus, which is applied to an aircraft, where the aircraft may be the aircraft 10 described in the above application scenario, please refer to fig. 8, which illustrates a structure of the map-based control apparatus provided in the embodiment of the present invention, where the map-based control apparatus 100 includes: a first setting unit 110, a second setting unit 120, and a transmitting unit 130.
The first setting unit 110 is configured to set a frame structure and a transmission bandwidth of image data according to a current channel quality; the second setting unit 120 is configured to set a channel and transmit power for transmitting an image according to a current transmission requirement for the image; the sending unit 130 is configured to pack image data according to the frame structure and the transmission bandwidth, and send the image data through the channel and the transmission power.
In some embodiments, please refer to fig. 9, which illustrates a structure of another graph-based control device provided in the embodiments of the present invention, where the graph-based control device 100 further includes: a search unit 140 for switching the aircraft to an initial state and searching for a remote control signal of a remote controller; the search unit 140 is further configured to open a default channel after searching for the remote control signal, so that the aircraft establishes a communication connection with the remote controller.
In some embodiments, the channel for transmitting the image includes two channels, the two channels are respectively connected to two antennas, and the initial state is a state where neither channel is opened.
In some embodiments, the searching unit 140 is further configured to obtain a comprehensive evaluation value of the received power and/or the signal-to-noise ratio of the two antennas; an antenna with a high integrated evaluation value is used as a transmitting antenna and a channel connected to the transmitting antenna is opened.
In some embodiments, with continued reference to fig. 9, the map-driven control apparatus 100 further comprises: and the power-on unit 150 is used for controlling the power-on starting of the aircraft.
In some embodiments, the first setting unit 110 is further configured to detect a transmission rate and/or a signal-to-noise ratio of a current channel; setting a frame structure of image data according to the transmission rate and/or the signal-to-noise ratio of the current channel; and setting the transmission bandwidth of the image data according to the frame structure.
In some embodiments, the duty cycle of the uplink subframe of the frame structure is inversely related to the transmission bandwidth, and the first setting unit 110 is further configured to determine whether the index value of the transmission rate of the current channel is lower than a preset index value when only a single antenna of the aircraft operates; if so, the duty cycle of the uplink subframe in the frame structure is reduced, and/or the transmission bandwidth is increased.
In some embodiments, the second setting unit 120 is further configured to set the transmission power of the single antenna according to the adjusted frame structure and transmission bandwidth; judging whether the transmitting power of the single antenna reaches the maximum transmitting power; if yes, increasing the number of opened channels to increase the number of antennas for the aircraft to work, and/or opening the antenna channels with high comprehensive evaluation values.
EXAMPLE III
An embodiment of the present invention provides a modem, please refer to fig. 10, which shows a hardware structure of a modem capable of executing the map transmission control method described in fig. 2 to fig. 7.
The modem 11 includes: at least one processor 11a; and a memory 11b communicatively connected to the at least one processor 11a, with one processor 11a being taken as an example in fig. 10. The memory 11b stores instructions executable by the at least one processor 11a, and the instructions are executed by the at least one processor 11a to enable the at least one processor 11a to perform the mapping control method described in fig. 2 to 7. The processor 11a and the memory 11b may be connected by a bus or other means, and fig. 10 illustrates the connection by a bus as an example.
The memory 11b is used as a non-volatile computer-readable storage medium, and can be used for storing non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the graph transmission control method in the embodiment of the present application, for example, the modules shown in fig. 8 to 9. The processor 11a executes various functional applications of the server and data processing by running the nonvolatile software programs, instructions and modules stored in the memory 11b, that is, implements the above-described method embodiment and the map control method.
The memory 11b may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the map-transfer control apparatus, and the like. Further, the memory 11b may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 11b may optionally include memory located remotely from the processor 11a, and these remote memories may be connected to the map-based control device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 11b, and when executed by the one or more processors 11a, perform the graph-based control method in any of the above-described method embodiments, for example, perform the method steps of fig. 2 to 7 described above, and implement the functions of the modules and units in fig. 8 to 9.
The product can execute the method provided by the embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the methods provided in the embodiments of the present application.
Embodiments of the present application also provide a non-transitory computer-readable storage medium storing computer-executable instructions for execution by one or more processors, for example, to perform the method steps of fig. 2-7 described above to implement the functions of the modules in fig. 8-9.
Embodiments of the present application further provide a computer program product comprising a computer program stored on a non-volatile computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the graph-passing control method in any of the above-described method embodiments, for example, to perform the method steps of fig. 2 to 7 described above, and to implement the functions of the respective modules in fig. 8 to 9.
Example four
Referring to fig. 11, a hardware structure of an aircraft according to an embodiment of the present invention is shown, where the aircraft 10 includes: a modem 11, a radio frequency front end module 12 and a transceiver 13 as described in the third embodiment.
The modem 11 is connected to the transceiver 13 through a CLOCK line CLOCK and a DATA line DATA, and the rf control port RFControl of the modem 11 is connected to the rf front-end module 12. Preferably, the modem selects a master frequency and a baseband chip with low power consumption of an on-chip module. The modem 11 can execute the map transmission control method according to the first embodiment of the present invention, and has the map transmission control device according to the second embodiment of the present invention, which is specifically shown in the first embodiment, the second embodiment and the drawings, and will not be described in detail here.
The radio frequency Front End Module (FEM) 12 includes two radio frequency antennas, and the number of channels of the radio frequency Front end module 12 and the connection state of the channels can be adjusted to adjust the antennas that are connected to the radio frequency Front end module, thereby implementing the graph transmission control.
The Transceiver (Transceiver) 13 is connected to two rf antennas via two rf front-end channels TX1 and TX2 of the rf front-end module 12.
In the embodiment of the invention, a graph transmission hardware structure with double transmitting paths is adopted, so that a plurality of combined control methods can be provided while long-distance low-power-consumption image transmission is realized, and the miniaturization design of an aircraft is ensured.
EXAMPLE five
An embodiment of the present invention provides a graph-driven control system, please refer to fig. 12, which shows a structure of the graph-driven control system provided in the embodiment of the present invention, where the graph-driven control system 1 includes: a remote control 20, and an aircraft 10 as described in example four.
The aircraft 10 is connected to the remote controller 20 in a communication manner, the aircraft 10 may be an application scenario and the aircraft 10 shown in fig. 1, and the remote controller 20 may be an application scenario and the remote controller 20 shown in fig. 1, which are not described in detail herein.
The embodiment of the invention provides an image transmission control method, an image transmission control device, an image transmission control system, a modem and an aircraft, wherein the modem in the aircraft can set a frame structure and a transmission bandwidth of image data according to the current channel quality in a software control mode, set a channel and transmission power for transmitting an image according to the current transmission requirement on the image, pack the image data according to the frame structure and the transmission bandwidth, send the image data through the channel and the transmission power, and realize low-power image transmission in the flight process of the aircraft and give consideration to long-distance stable image transmission at the same time by dynamically adjusting the frame structure, the transmission bandwidth, the channel and the transmission power.
It should be noted that the above-described embodiments of the apparatus are merely illustrative, where the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, it is obvious to those skilled in the art that the embodiments may be implemented by software plus a general hardware platform, and may also be implemented by hardware. It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (13)
1. A map-based control method, applied to an aircraft, the method comprising:
setting a frame structure and a transmission bandwidth of image data according to the current channel quality;
setting a channel and transmitting power for transmitting the image according to the current transmission requirement on the image;
and packing the image data according to the frame structure and the transmission bandwidth, and sending the image data through the channel and the transmitting power.
2. The map transmission control method according to claim 1, wherein before the setting of the frame structure and the transmission bandwidth of the image data according to the current channel quality, the method further comprises:
switching the aircraft to an initial state and searching for a remote control signal of a remote controller;
and after the remote control signal is searched, opening a default channel so that the aircraft can establish communication connection with the remote controller.
3. The map-rendering control method of claim 2,
the channel for transmitting the image comprises two channels which are respectively connected to the two antennas, and the initial state is a state that the two channels are not opened.
4. The graph transmission control method according to claim 3, wherein the opening a default channel comprises:
acquiring comprehensive evaluation values of the receiving power and/or the signal-to-noise ratio of the two antennas;
an antenna with a high integrated evaluation value is used as a transmitting antenna and a channel connected to the transmitting antenna is opened.
5. The map transmission control method according to claim 2,
before the setting of the initial state of the aircraft and the searching for remote control signals, the method further comprises:
and controlling the aircraft to be powered on and started.
6. The image transmission control method according to any one of claims 1 to 5, wherein the setting of the frame structure and the transmission bandwidth of the image data according to the current channel quality comprises:
detecting the transmission rate and/or the signal-to-noise ratio of the current channel;
setting a frame structure of image data according to the transmission rate and/or the signal-to-noise ratio of the current channel;
and setting the transmission bandwidth of the image data according to the frame structure.
7. The method of claim 6, wherein the duty cycle of the uplink subframe of the frame structure is inversely related to the transmission bandwidth, and wherein the method further comprises:
when the aircraft only works with a single antenna, judging whether the index value of the transmission rate of the current channel is lower than a preset index value;
if yes, the duty ratio of the uplink sub-frame in the frame structure is reduced and/or the transmission bandwidth is increased.
8. The image transmission control method according to claim 7, wherein the setting of the channel and the transmission power for transmitting the image according to the current transmission requirement for the image comprises:
setting the transmitting power of the single antenna according to the adjusted frame structure and transmission bandwidth;
judging whether the transmitting power of the single antenna reaches the maximum transmitting power;
if yes, increasing the number of opened channels to increase the number of antennas for the aircraft to work, and/or opening the antenna channels with high comprehensive evaluation values.
9. A map-driven control device, for use in an aircraft, the device comprising:
a first setting unit for setting a frame structure and a transmission bandwidth of the image data according to the current channel quality;
the second setting unit is used for setting a channel and transmitting power for transmitting the image according to the current transmission requirement on the image;
and the sending unit is used for packing the image data according to the frame structure and the transmission bandwidth and sending the image data through the channel and the transmitting power.
10. A modem, comprising:
at least one processor; and (c) a second step of,
a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-8.
11. A computer-readable storage medium having computer-executable instructions stored thereon for causing a computer to perform the method of any one of claims 1-8.
12. An aircraft, characterized in that it comprises:
a radio frequency front end module comprising two radio frequency antennas;
the transmission dual ports of the radio transceiver are respectively connected to the two radio frequency antennas through two radio frequency front end channels of the radio frequency front end module;
the modem of claim 10 connected to the transceiver by a clock line and a data line, and a radio frequency control port of the modem connected to the radio frequency front end module.
13. A graph-based control system, comprising: a remote control, and an aircraft according to claim 12.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368699A (en) * | 2011-09-30 | 2012-03-07 | 歌尔声学股份有限公司 | Wireless digital communication method |
| CN102685467A (en) * | 2012-04-27 | 2012-09-19 | 中国科学院空间科学与应用研究中心 | Wireless image transmission communication system for unmanned aerial vehicle and wireless image transmission communication method |
| CN105827384A (en) * | 2016-05-13 | 2016-08-03 | 黄剑锋 | Broadband wireless integrated data transmission method and system for unmanned aerial vehicle |
| CN107634816A (en) * | 2016-07-18 | 2018-01-26 | 深圳市中兴微电子技术有限公司 | A kind of unmanned plane figure transmission method based on Long Term Evolution, device and system |
| CN107820088A (en) * | 2017-11-01 | 2018-03-20 | 西安万像电子科技有限公司 | Image data transfer method and device |
| US20180213017A1 (en) * | 2017-01-23 | 2018-07-26 | Smartech Worldwide Limited | Method and system for matching image transmission bandwidth and electronic device |
| CN110536390A (en) * | 2019-09-02 | 2019-12-03 | Oppo（重庆）智能科技有限公司 | Control method, device and the computer storage medium of radio circuit |
| CN111784996A (en) * | 2020-07-01 | 2020-10-16 | 思翼科技（深圳）有限公司 | Unmanned aerial vehicle remote control method adaptive to bandwidth |
| CN114466441A (en) * | 2022-03-10 | 2022-05-10 | 珠海泰芯半导体有限公司 | Method and device for adjusting transmission power, storage medium and WiFi (Wireless Fidelity) equipment |
-
2022
- 2022-08-19 CN CN202211000800.4A patent/CN115426437A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368699A (en) * | 2011-09-30 | 2012-03-07 | 歌尔声学股份有限公司 | Wireless digital communication method |
| CN102685467A (en) * | 2012-04-27 | 2012-09-19 | 中国科学院空间科学与应用研究中心 | Wireless image transmission communication system for unmanned aerial vehicle and wireless image transmission communication method |
| CN105827384A (en) * | 2016-05-13 | 2016-08-03 | 黄剑锋 | Broadband wireless integrated data transmission method and system for unmanned aerial vehicle |
| CN107634816A (en) * | 2016-07-18 | 2018-01-26 | 深圳市中兴微电子技术有限公司 | A kind of unmanned plane figure transmission method based on Long Term Evolution, device and system |
| US20180213017A1 (en) * | 2017-01-23 | 2018-07-26 | Smartech Worldwide Limited | Method and system for matching image transmission bandwidth and electronic device |
| CN107820088A (en) * | 2017-11-01 | 2018-03-20 | 西安万像电子科技有限公司 | Image data transfer method and device |
| CN110536390A (en) * | 2019-09-02 | 2019-12-03 | Oppo（重庆）智能科技有限公司 | Control method, device and the computer storage medium of radio circuit |
| CN111784996A (en) * | 2020-07-01 | 2020-10-16 | 思翼科技（深圳）有限公司 | Unmanned aerial vehicle remote control method adaptive to bandwidth |
| CN114466441A (en) * | 2022-03-10 | 2022-05-10 | 珠海泰芯半导体有限公司 | Method and device for adjusting transmission power, storage medium and WiFi (Wireless Fidelity) equipment |
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