Disclosure of Invention
In view of this, the present invention provides a communication system, which is mainly aimed at reducing the cost and improving the rate of data transmission of an aircraft network.
In order to solve the problems, the invention mainly provides the following technical scheme:
A communication system, comprising:
the satellite communication system comprises a plurality of satellites, wherein each satellite is provided with an inter-satellite laser communication terminal device for inter-satellite communication, a satellite aircraft laser communication terminal device for inter-satellite communication and a ground laser communication terminal device for inter-satellite communication; the inter-satellite-based laser communication terminal equipment among the plurality of communication satellites realizes communication connection through a laser link;
An aircraft communication system comprising a predetermined number of aircraft satellite laser communication terminal devices in communication with satellites; and the satellite laser communication terminal equipment based on the aircraft communicates with a satellite communication system through a laser link.
Further, the predetermined number is one, and the elevation angle of the satellite laser communication terminal equipment of the aircraft is the satellite-to-ground opening angle;
and one satellite aircraft laser communication terminal device in each satellite in a preset time period is in communication connection with the one aircraft satellite laser communication terminal device.
Further, the preset number is at least two, and the elevation angles of the at least two aircraft satellite laser communication terminal devices are combined into a satellite-to-ground opening angle;
The method comprises the steps that communication connection is established between satellite aircraft laser communication terminal equipment in a first satellite and first aircraft satellite laser communication terminal equipment in an aircraft within a preset first time period;
and when the first satellite leaves the service area of the aircraft, and communication connection is established between the first satellite laser communication terminal equipment of the aircraft and the satellite laser communication terminal equipment of the second satellite, and communication connection is established between the satellite laser communication terminal equipment of the second satellite and the satellite laser communication terminal equipment of the second aircraft.
Further, each satellite carries a plurality of satellite vehicle laser communication terminal devices, and the plurality of satellite vehicle laser communication terminal devices are arranged according to a preset communication array.
Further, the method comprises the steps of,
Setting the overlooking angle of the satellite aircraft laser communication terminal equipment as the satellite earth opening angle, and forming communication coverage of each satellite earth opening angle by each satellite aircraft laser communication terminal equipment;
Or alternatively
And setting the overlooking angle of the satellite aircraft laser communication terminal equipment to be larger than 0 DEG and smaller than the satellite ground opening angle, and forming communication coverage of each satellite ground opening angle by a preset number of satellite aircraft laser communication terminal equipment.
Further, the method comprises the steps of,
If the overlooking angles of the plurality of satellite vehicle laser communication terminal devices are satellite-to-earth opening angles, arranging and laying out the plurality of satellite vehicle laser communication terminal devices in each satellite according to any arrangement mode;
If the overlooking angle of the plurality of satellite vehicle laser communication terminal devices is more than 0 degrees and less than the satellite ground opening angle, arranging and laying out the plurality of satellite vehicle laser communication terminal devices in each satellite according to a first preset arrangement mode;
And if the overlooking angle of the plurality of satellite vehicle laser communication terminal devices comprises more than 0 degrees and less than the satellite ground opening angle and the satellite ground opening angle, the plurality of satellite vehicle laser communication terminal devices are mixed and arranged in the satellite according to a second preset arrangement mode.
Further, the method comprises the steps of,
The plurality of satellites are on the same orbit plane, or a first number of satellites in the plurality of satellites are on a first orbit plane, and a second number of satellites are on a second orbit plane;
two satellites adjacent to each other on the same track surface are connected with a laser communication link in a direct connection or relay connection mode; satellites at different orbital planes, at least one pair of satellites communicate via a direct-connect or relay-connect laser link.
Further, the direct connection mode is a mode of directly connecting the handles.
Further, the aircraft is a fixed wing aircraft, a helicopter, an aviation balloon, an airship, an unmanned aerial vehicle or a near space aircraft.
According to the communication system provided by the invention, based on the laser communication terminal equipment, the laser is used as a transmission medium, so that the communication connection between the aircraft and the satellite and between the satellite and the satellite is realized, and the 1040Gbps can be easily achieved due to high laser communication speed and large information capacity.
And each satellite further comprises a ground laser communication terminal device for communication between the satellite and the ground station, so that the satellite and the ground station device establish laser communication, and therefore, the data of the aircraft and network resource data uploaded on the ground can be transmitted through the established laser link, the aircraft is not an information island any more, the data can be collected, transmitted and analyzed for use, the problem in the flight of the aircraft can be found and solved in time, and the management, control and maintenance cost of the aircraft is reduced to a great extent.
Furthermore, the space laser communication link does not need to be approved, is not limited by frequency spectrum, and has good expandability.
Furthermore, the laser communication terminal equipment for laser communication has the advantages of small power consumption of a light source, high conversion efficiency, small receiving and transmitting antenna and capability of realizing the volume, weight and power consumption of the equipment.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
An embodiment of the present invention provides a communication system, as shown in fig. 1, including: satellite communication system 1, aircraft communication system 2.
The satellite communication system 1 comprises a plurality of satellites, wherein each satellite is provided with an inter-satellite laser communication terminal device for inter-satellite communication, a satellite aircraft laser communication terminal device for inter-satellite communication and a ground laser communication terminal device for inter-satellite communication; and communication connection is realized among the plurality of communication satellites based on inter-satellite laser communication terminal equipment through a laser link.
Through reasonable layout of the satellites, full communication coverage of the satellite communication system on the earth on a certain track surface or in certain areas is achieved.
In addition, the number of satellites may be determined based on satellite-to-earth altitude and communication coverage. On the premise of full communication coverage, the method and the device can also be set according to operation requirements and operation cost, and the specific embodiment of the invention is not limited to the method and the device.
An aircraft communication system 2 comprising a predetermined number of aircraft satellite laser communication terminal devices in communication with satellites; and the satellite laser communication terminal equipment based on the aircraft is in communication connection with a satellite communication system through a laser link. The airborne mobile aircraft may be an artificial flight platform such as a fixed-wing aircraft, helicopter, aeroballoon, airship, unmanned aerial vehicle, and near-space aircraft, which is not limited in the embodiment of the invention, and other aerospace aircraft may also be included in the embodiment of the invention.
The aircraft communication system is installed on an aircraft, for example, when the aircraft is an airplane, the aircraft communication system can be specifically installed in a fairing on the top surface of the airplane, and laser of the first aircraft satellite laser communication terminal device is emitted through the fairing so as to be in communication connection with the satellite communication system through a laser link.
In the embodiment of the invention, based on the laser communication terminal equipment, the laser is used as a transmission medium to realize the communication connection between the aircraft and the satellite and between the satellite and the satellite, and 1040Gbps can be easily achieved due to high laser communication speed and large information capacity, compared with the radio communication in the prior art, the transmission speed of the aircraft data and the number of users served are improved to a great extent, the data transmission is rapid, and the passenger surfing experience is greatly improved.
And each satellite further comprises a ground laser communication terminal device for communication between the satellite and the ground station, so that the satellite and the ground station device establish laser communication, and therefore, the data of the aircraft and network resource data uploaded on the ground can be transmitted through the established laser link, the aircraft is not an information island any more, the data can be collected, transmitted and analyzed for use, the problem in the flight of the aircraft can be found and solved in time, and the management, control and maintenance cost of the aircraft is reduced to a great extent.
Furthermore, the space laser communication link does not need to be approved, is not limited by frequency spectrum, and has good expandability.
Furthermore, the laser communication terminal equipment for laser communication has the advantages of small power consumption of a light source, high conversion efficiency, small receiving and transmitting antenna and capability of realizing the volume, weight and power consumption of the equipment.
Further, the predetermined number of the satellite laser communication terminal devices may be one or more, which is not limited in the embodiment of the present invention. When one, the aim is to achieve communication between the aircraft and the satellite; when the number of the first aircraft satellite laser communication terminal devices is multiple, the first aircraft satellite laser communication terminal devices are respectively in communication connection with the second satellite at a certain moment when the satellites are overtravel, uninterrupted communication between the aircraft and the satellites is realized, and uninterrupted transmission of mobile terminal data is realized.
The method is characterized in that when the preset number of the aircraft satellite laser communication terminal devices is one, the elevation angle of the aircraft satellite laser communication terminal device is the satellite-to-ground opening angle; and one satellite aircraft laser communication terminal device in each satellite in a preset time period is in communication connection with the one aircraft satellite laser communication terminal device.
When the predetermined number of the aircraft satellite laser communication terminal devices is a plurality of, the elevation angles of the plurality of aircraft satellite laser communication terminal devices form coverage of the depression angle of one communication satellite; the satellite vehicle laser communication terminal device in the first satellite establishes a communication connection with the first vehicle satellite laser communication terminal device in the vehicle within a predetermined first time period.
And when the first satellite leaves the service area of the aircraft, and communication connection is established between the first satellite laser communication terminal equipment of the aircraft and the satellite laser communication terminal equipment of the second satellite, and communication connection is established between the satellite laser communication terminal equipment of the second satellite and the satellite laser communication terminal equipment of the second aircraft. For example, when the satellite a is over-top, the first aircraft satellite laser communication terminal device is in communication connection with the satellite a, and when the satellite a is about to leave the service area and keeps communicating with the first aircraft satellite laser communication terminal device, the second aircraft satellite laser communication terminal device is in communication connection with the satellite B about to enter the service area, so that uninterrupted communication between the aircraft and the satellite communication network is realized, and uninterrupted transmission of aircraft data is realized.
Based on the characteristic of laser linear transmission, laser communication is performed one-to-one, that is, one satellite-borne satellite vehicle laser communication terminal device is in communication connection with one first aircraft satellite vehicle laser communication terminal device on the aircraft, in other words, one satellite-borne satellite vehicle laser communication terminal device can only provide service for one aircraft at a time. In the implementation process, if one satellite can provide laser communication services for a plurality of aircrafts, a plurality of satellite aircrafts laser communication terminal devices need to be installed in one satellite.
As described above, each satellite has a look-down angle covering the earth communication according to the altitude from the earth, and the satellite communication is utilized to the greatest extent, and the most aircraft with which the satellite communication is communicated is scanned and captured, and the look-down angle of the satellite aircraft laser communication terminal device to the earth is preferably the look-down angle of the satellite. Aiming at the principle that one satellite can provide service for a plurality of aircrafts, the overlooking angle of the satellite aircraft laser communication terminal equipment can be set as the satellite earth opening angle, and as shown in fig. 3, the satellite aircraft laser communication terminal equipment with the plurality of satellite earth opening angles can be loaded in one satellite, and the satellite aircraft laser communication terminal equipment with the satellite earth opening angle can complete the full coverage of the satellite earth opening angle. Based on the arrangement, the plurality of satellite vehicle laser communication terminal devices carried in each satellite can be arranged and laid out in each satellite according to any arrangement mode.
Further, if the satellite to ground opening angle full coverage is realized by one satellite aircraft laser communication terminal device, the angle rotation device of the satellite aircraft laser communication terminal device needs to be large, which can cause the weight of the satellite aircraft laser communication terminal device to be heavy, in the actual operation process, the cost of transmitting the satellite is calculated by taking the weight as a unit, and if all the satellite aircraft laser communication terminal devices arranged in one satellite are satellite aircraft laser communication terminal devices with satellite to ground opening angles, the cost is extremely high. How to maximize the communication coverage, the maximum number of service aircraft and the relatively reasonable cost in the satellite operation process. The embodiment of the invention provides the following method for solving the problems. The method comprises the following specific steps: the method comprises the steps that a plurality of satellite vehicle laser communication terminal devices are arranged in satellites, each satellite vehicle laser communication terminal device covers a certain satellite coverage angle, and a preset number of satellite vehicle laser communication terminal devices carried by each satellite form communication coverage of each satellite to the ground opening angle. The preset overlooking angle is determined according to the distance between the satellite and the earth and the tangential included angle between the satellite and the earth.
The layout of the laser communication terminal devices of the plurality of satellite aircrafts in each satellite can be realized by adopting, but not limited to, the following modes: and setting the overlooking angle of the satellite vehicle laser communication terminal equipment to be larger than 0 DEG and smaller than the satellite ground opening angle, wherein the communication coverage of each satellite ground opening angle consists of a preset number of satellite vehicle laser communication terminal equipment with the corresponding angle larger than 0 DEG and smaller than the satellite ground opening angle. For example, the satellite vehicle laser communication terminal device is set to have a look-down angle of 30 °, and if the predetermined look-down angle is 120 °, at least 4 satellite vehicle laser communication terminal devices having a look-down angle of 30 ° form a communication coverage of 120 ° for each satellite.
Based on the setting of the overlooking angle of the satellite vehicle laser communication terminal equipment, when the layout of a plurality of satellite vehicle laser communication terminal equipment in a satellite is performed, the following modes can be adopted, but are not limited to, the modes include:
And a plurality of groups of satellite aircraft laser communication terminal devices with the preset number larger than 0 DEG and smaller than the overlooking angle of the satellite are arranged in one satellite. And the set of the group number can be determined by the number of the served aircrafts within the predetermined communication coverage area; for example, the included angle between the two satellite vehicle laser communication terminal devices may be 15 °. In particular, embodiments of the present invention are not limited in this regard. The specific angles of the plurality of sets of predetermined satellite aircraft laser communication terminal devices larger than 0 ° and smaller than the satellite overhead view angle may be the same or different, and the embodiment of the present invention is not limited thereto. Based on the arrangement, a plurality of the opposite laser communication terminal devices loaded in each satellite form a plurality of communication groups which are formed by a preset number of opposite laser communication terminal devices with the angle larger than 0 DEG and smaller than the overlooking angle of the satellite. And the plurality of satellite aircraft laser communication terminal devices are arranged and laid out in each satellite according to a first preset arrangement mode. The first predetermined arrangement manner may be an array such as a square or a diamond, which is not limited in the embodiment of the present invention, and may be other arrangement manners.
In addition to the two modes, in the practical implementation process of the embodiment of the invention, in the communication range covered by one satellite, the aircrafts in some areas are relatively dense, the range distance is relatively short, and therefore, the laser communication terminal equipment of the satellite aircrafts with relatively small communication service coverage angles needs to be arranged in the aircrafts; the aircraft with some areas is sparse, and the range distance is longer, which requires that the laser communication terminal equipment of the satellite aircraft with the communication service coverage angle being relatively larger and even the same as the predetermined coverage angle of the satellite be arranged in the aircraft. Aiming at the service requirement, the embodiment of the invention also provides the following satellite internal satellite aircraft laser communication terminal equipment, which comprises the following specific steps: and setting a plurality of groups of satellite vehicle laser communication terminal devices with the preset number being larger than 0 DEG and smaller than the satellite overlooking angle and the satellite vehicle laser communication terminal devices with the preset satellite coverage angle. I.e. the settings of the two satellite vehicle laser communication terminal devices are mixed for use. Based on the arrangement, a plurality of satellite vehicle laser communication terminal devices loaded in each satellite form a plurality of groups of communication groups which are formed by a preset number of satellite vehicle laser communication terminal devices which are larger than 0 DEG and smaller than the satellite overlooking angle and satellite vehicle laser communication terminal devices which are of a preset satellite coverage angle. And the plurality of satellite aircraft laser communication terminal devices are subjected to mixed arrangement layout in the satellite according to a second preset arrangement mode. The second predetermined arrangement may be an array such as a square or a diamond, which is not limited in the embodiment of the present invention, and may be other arrangements.
As described above, a satellite vehicle laser communication terminal device in a satellite communication system provides network data transmission services for a vehicle during a certain period of time, when the aircraft communication system is set, at least one aircraft satellite laser communication terminal device is required to be set in the aircraft communication system.
Because the satellites in the embodiment of the invention are low-orbit satellites, the low-orbit satellites have limited heights from the earth, so the communication coverage of the satellite ground station balls is limited, one satellite cannot realize the full coverage of laser communication of a preset number of aircrafts, the space layout of a plurality of satellites is needed, and the full coverage of the laser communication in a preset area is realized, so that the laser communication service of the preset number of aircrafts is realized.
Based on the principle, when a plurality of satellites are spatially distributed, the space distribution is generally carried out according to the flight orbit surface of the satellites, and the plurality of satellites positioned on the same orbit surface are connected with each other through a laser communication link in a direct connection mode; the direct connection mode is convenient for the direct transmission determination of laser and avoids the shielding of laser transmission, and can be a handle type connection mode, and the embodiment of the invention is not limited and can also be in other topological structure modes.
Here, the connection of the laser communication link may be performed by a relay connection method in addition to the direct connection method described above. For example, two satellites in communication with each other are relayed through a high orbit satellite; specifically, the embodiment of the present invention is not limited thereto, and relay switching may be performed by other satellites or devices.
Further, in order to enable satellite communications to service laser communications for aircraft in more areas, a plurality of orbital plane satellites may be deployed when the spatial layout of the plurality of satellites is performed, such that the plurality of satellites may be on different orbital planes. In order to realize mutual communication among all the plurality of satellites, the embodiment of the invention also provides a satellite layout and a communication mode among satellites, wherein the communication mode is specifically as follows:
two satellites adjacent to each other on the same track surface are connected with a laser communication link in a direct connection or relay connection mode; satellites at different orbital planes, at least one pair of satellites communicate via a direct-connect or relay-connect laser link.
The satellites in different orbit planes are connected with each other in a correlated way; at least one pair of satellites on different orbit planes are in communication connection through a laser link, and a plurality of pairs of satellites can also be provided, but the embodiment of the invention prefers the pair of satellites based on the operation cost factor. For example, as shown in fig. 4, the satellite a is located on the first track surface, the satellite B is located on the second track surface, and if communication between the satellite a and the satellite B needs to be achieved, the satellite a and the satellite B can be connected, so that any satellite on the first track surface can transmit data to any satellite on the second track surface through the satellite a; any one of the satellites on the second orbital plane may transmit data to any one of the satellites on the first orbital plane through the B satellite; based on the satellite networking mode, any satellite in the satellite network realizes laser communication with the ground station, and data of any satellite on any orbit surface can realize communication transmission with the ground station. So that the flexibility of data transmission is better.
Here as well, the connection method of the direct satellites on different orbit planes may be a relay method in addition to the direct connection.
Based on the above description, the communication between the plurality of satellites may be performed by a direct connection method, a relay connection method, or a combination of the direct and relay methods, and the embodiment of the present invention is not limited thereto in specific implementation, and may be specifically performed according to the needs.
According to the communication system provided by the invention, based on the laser communication terminal equipment, the laser is used as a transmission medium, so that the communication connection between the aircraft and the satellite and between the satellite and the satellite is realized, and the 1040Gbps can be easily achieved due to high laser communication speed and large information capacity.
And each satellite further comprises a ground laser communication terminal device for communication between the satellite and the ground station, so that the satellite and the ground station device establish laser communication, and therefore, the data of the aircraft and network resource data uploaded on the ground can be transmitted through the established laser link, the aircraft is not an information island any more, the data can be collected, transmitted and analyzed for use, the problem in the flight of the aircraft can be found and solved in time, and the management, control and maintenance cost of the aircraft is reduced to a great extent.
Furthermore, the space laser communication link does not need to be approved, is not limited by frequency spectrum, and has good expandability.
Furthermore, the laser communication terminal equipment for laser communication has the advantages of small power consumption of a light source, high conversion efficiency, small receiving and transmitting antenna and capability of realizing the volume, weight and power consumption of the equipment.
In addition, in the embodiment of the invention, the satellite communication system is composed of a plurality of mutually communicated satellites, so that the data uploading and downloading of the satellites are relatively convenient.
Furthermore, in the embodiment of the invention, each satellite can bear a plurality of satellite aircraft laser communication terminal devices, so that one satellite can provide communication services for a plurality of aircraft at the same time, the use value of satellite communication is improved, and the operation cost of satellite operation is reduced.
Furthermore, each satellite carries a plurality of laser communication terminal devices of the satellite aircraft, and the laser communication terminal devices can be set to be laser communication terminal devices with different overlooking angles, so that the flexibility of the laser communication terminal devices carried by the satellites is high, and the operability of operation is high. Moreover, as the overlooking angle of the satellite-borne satellite aircraft laser communication terminal equipment is wide in adjustable range, when the selected overlooking angle is smaller, the rotation angle of the satellite aircraft laser communication terminal equipment is smaller, the weight of the satellite aircraft laser communication terminal equipment conversion equipment can be reduced from certain layers, and the satellite emission cost is reduced to a certain extent.
In addition, in the embodiment of the invention, a plurality of aircraft satellite laser communication terminal devices forming a satellite overlooking angle can be arranged at the aircraft, so that the aircraft satellite laser communication terminal devices are flexibly arranged.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CDROM, optical storage, etc.) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include non-volatile memory in a computer-readable medium, random Access Memory (RAM) and/or non-volatile memory, etc., such as read-only memory (ROM) or flash memory (flashRAM). Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact Disc Read Only Memory (CDROM), digital Versatile Disks (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transitorymedia), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CDROM, optical storage, etc.) having computer-usable program code embodied therein.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.