CN111756430A - Internet communication method, system and terminal equipment based on low-orbit satellite - Google Patents
Internet communication method, system and terminal equipment based on low-orbit satellite Download PDFInfo
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- CN111756430A CN111756430A CN202010751746.1A CN202010751746A CN111756430A CN 111756430 A CN111756430 A CN 111756430A CN 202010751746 A CN202010751746 A CN 202010751746A CN 111756430 A CN111756430 A CN 111756430A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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Abstract
The invention discloses an internet communication method, a system and terminal equipment based on a low-orbit satellite, wherein the system comprises a ground station, a first low-orbit satellite which is closest to the ground station, the terminal equipment and a second low-orbit satellite which is closest to the terminal equipment, the ground station is used for uploading network information to the first low-orbit satellite, the first low-orbit satellite is used for sending the network information to the second low-orbit satellite, the second low-orbit satellite is used for sending the network information to the terminal equipment, and the terminal equipment receives the network information, decodes the network information and outputs the decoded network information. According to the invention, the low-orbit satellite is adopted to replace an optical fiber, and the ground terminal equipment and the satellite internet are fused by constructing an internet communication system based on the low-orbit satellite, so that the ground network coverage is realized; and the internet communication system can provide stable communication when natural disasters such as earthquakes and typhoons occur.
Description
Technical Field
The invention relates to the technical field of internet communication, in particular to an internet communication method, system and terminal equipment based on a low-orbit satellite.
Background
With the development of technology, the internet gradually develops from 1G, 2G, 3G and 4G to 5G at present, and terminal devices such as mobile phones and televisions supporting 5G are now available, but the existing networks are all implemented by a ground mobile communication system based on a base station on the bottom surface.
The total amount of Chinese 4G communication base stations occupies 64 percent of the whole world, the coverage rate of the base stations is far ahead in the world, but 4G network signals in all regions cannot be guaranteed, and the network signals of other countries are always a big problem even after communication infrastructures in Africa and Lamei countries fall behind. In sparsely populated areas such as the middle of the united states, northern canada, and the like, 4G network signal coverage is also far from ideal. And the existing communication network framework is damaged by the base station when encountering natural disasters, and the communication is immediately interrupted. Currently, 30 hundred million users on the earth cannot access the network due to lack of communication means.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a method, a system and a terminal device for internet communication based on low orbit satellites, which aims to solve the problems of low network coverage in underdeveloped areas and communication interruption caused by the damage of the existing communication network framework due to natural disasters.
The technical scheme of the invention is as follows:
the utility model provides an internet communication system based on low orbit satellite, wherein, including the ground satellite, with the ground station is nearest first low orbit satellite in distance, terminal equipment, and with the terminal equipment is nearest second low orbit satellite in distance, the ground station is used for uploading network information to first low orbit satellite, first low orbit satellite be used for with network information sends to second low orbit satellite, second low orbit satellite be used for with network information sends to terminal equipment, terminal equipment receives network information and to export after decoding network information.
The internet communication system based on the low orbit satellite comprises a terminal device and a satellite signal antenna, wherein the terminal device comprises a built-in satellite signal antenna, and the satellite signal antenna comprises a microstrip antenna, a Ku waveband antenna unit and a Ka waveband antenna unit.
The internet communication system based on the low orbit satellite is characterized in that the terminal equipment further comprises a low noise amplifier, a frequency converter and an error correction decoder which are sequentially and electrically connected, and an audio decoder, a video decoder and a memory which are respectively and electrically connected with the error correction decoder.
The internet communication system based on the low orbit satellite comprises an antenna subsystem and a transmitting subsystem, wherein the transmitting subsystem is used for modulating network information onto a carrier wave of a satellite working waveband, and the network information is amplified at high power and then is sent to the first low orbit satellite through the antenna subsystem.
The internet communication system based on the low orbit satellite comprises a Ku waveband, a Ka waveband and a V waveband.
The internet communication system based on the low orbit satellite, wherein the network information includes a video signal and an audio signal.
The internet communication system based on the low orbit satellite further comprises a server which is in communication connection with the ground station, and the server is used for transmitting network information to the ground station.
The internet communication system based on the low-orbit satellite is characterized in that the launching heights of the first low-orbit satellite and the second low-orbit satellite are 500-2000 km.
A communication method based on an internet communication system, comprising the steps of:
the terminal equipment sends a network access request to the ground station through the second low-orbit satellite and the first low-orbit satellite in sequence;
and the terminal equipment receives the network information sent from the ground station, decodes the network information and then outputs the decoded network information.
A terminal device comprises a built-in satellite signal antenna, a low noise amplifier, a frequency converter and an error correction decoder which are electrically connected in sequence, and an audio decoder, a video decoder and a memory which are respectively electrically connected with the error correction decoder.
Has the advantages that: the invention provides an internet communication system based on a low-orbit satellite, which uploads network information to a first low-orbit satellite closest to the ground station through the ground station, the first low-orbit satellite sends the network information to a second low-orbit satellite closest to a terminal device, and the terminal device receives the network information, decodes the network information and outputs the decoded network information. The invention adopts a low orbit satellite to replace an optical fiber in a less developed area, integrates ground terminal equipment and a satellite internet, realizes the coverage of a ground network, and provides stable communication when natural disasters such as earthquakes and typhoons occur.
Drawings
Fig. 1 is a schematic diagram of a low-orbit satellite-based internet communication system according to a preferred embodiment of the present invention.
Fig. 2 is a communication link diagram of the internet communication system based on low orbit satellites according to the present invention.
Fig. 3 is a schematic block diagram of the terminal device of the present invention.
FIG. 4 is a flowchart of a preferred embodiment of a method for Internet communication based on low-orbit satellites according to the present invention.
Detailed Description
The invention provides an internet communication method, system and terminal device based on a low orbit satellite, and the invention is further described in detail below in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including 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. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In order to solve the problems of low network coverage in underdeveloped regions and communication interruption caused by easy damage of an existing communication network framework due to natural disasters, the invention provides an internet communication system based on a low-orbit satellite, as shown in fig. 1, the internet communication system comprises a ground station 10, a first low-orbit satellite 20 closest to the ground station 10, a terminal device 30 and a second low-orbit satellite 40 closest to the terminal device 30, wherein the ground station 10 is used for uploading network information to the first low-orbit satellite 20, the first low-orbit satellite 20 is used for sending the network information to the second low-orbit satellite 40, the second low-orbit satellite 40 is used for sending the network information to the terminal device 30, and the terminal device 30 receives the network information, decodes the network information and outputs the decoded network information.
In this embodiment, as shown in fig. 1-2, the internet communication system further includes a server 50 establishing a communication connection with the ground station 10, and the server 50 is configured to transmit network information to the ground station 10. When a user accesses network information through a terminal device 30, the server 20 transmits the network information to the ground station 10, the ground station 10 uploads the network information to a first orbit satellite 20 closest to the ground station 10 through a protocol, the first orbit satellite 20 searches for a second orbit satellite 40 closest to the terminal device 30 through laser, the first orbit satellite 20 transmits the network information to the second orbit satellite 40, the second orbit satellite 40 transmits the network information to the terminal device 30, and finally the terminal device 30 decodes and outputs the received network information to complete one-time data communication.
In the embodiment, the low-orbit satellite is adopted to replace an optical fiber, and the ground terminal equipment and the satellite internet are fused by constructing an internet communication system based on the low-orbit satellite, so that the coverage of a ground network is realized; and the internet communication system provided by the embodiment can provide stable communication when natural disasters such as earthquake and typhoon occur.
In this embodiment, the internet communication system is implemented based on a low-orbit satellite system, where the low-orbit satellite system generally refers to a satellite system that is formed by a plurality of satellites and can perform real-time information processing, the distribution of the satellites is referred to as a satellite constellation, the low-orbit satellite can be used for network communication, the low orbit height of the satellite makes signal transmission delay short and path loss small, and a communication system formed by a plurality of satellites can implement true global coverage, so that frequency reuse is more effective.
The low-orbit satellite constellation is composed of a plurality of satellites on a plurality of orbits, and the low-orbit satellite and the earth are not synchronous, so that the constellation is continuously changed, and the relative positions of the satellites are also continuously changed. In order to facilitate management and realize real-time communication of a multi-satellite system, the low-orbit satellites are connected with the ground terminal and the gateway station, and the low-orbit satellites are also connected with each other through a ground link and an inter-satellite link. The general constellation comprises a plurality of satellite orbits, and in order to coordinate work and communicate in real time among the low orbit satellites, the inter-orbit links exist among the satellites in different orbits, so that the inter-orbit links avoid information from being transmitted back to the ground for processing and routing, secondary service distribution is reduced, and communication delay is reduced compared with the ground links.
The inter-track link belongs to a wireless link and can adopt a microwave link, a millimeter wave link or a laser link. When the microwave link is adopted, the frequency of the carrier wave is low, so that the required antenna size is large, the transmitting power is also large, and the bandwidth of the link between the whole tracks is narrow, so that the microwave link can only adapt to the condition of small data transmission quantity. By adopting the millimeter wave or laser link, a small antenna, low output power and a small transmitter can be used, so that the size and the quality of the satellite are reduced, the power consumption is reduced, meanwhile, the bandwidth of a communication frequency band is improved due to high working frequency, and the interference to other antennas is greatly reduced by adopting the working frequency band different from that of other antennas.
In the embodiment, a distributed networking framework is adopted among the low-orbit satellites, and laser communication is adopted among the low-orbit satellites. The low-orbit satellite with the height of 500-2000km is adopted in the embodiment, the coverage is wide, the ground surface constraint is small, and the constellation formed by the low-orbit satellite can cover almost any corner of the earth, including desert, sea, mountain and even aviation scenes. The internet communication system based on the low orbit satellite provided by the embodiment can effectively solve the problem that the remote and laggard areas cannot access the internet, the constellation consisting of a plurality of satellites can realize real global coverage, and the frequency reuse is more effective; the internet communication system provided by the embodiment also has the advantages of shorter transmission delay and smaller path loss, and can provide stable communication when natural disasters such as earthquakes and typhoons occur.
In some embodiments, in order to ensure the signal transmission of the communication low-orbit satellite, it is necessary to provide a ground station, the basic function of which is to transmit signals to the satellite and simultaneously receive signals forwarded by the satellite, and the ground stations for various purposes are slightly different but have the same basic facility. Specifically, the ground station includes an antenna subsystem and a transmitting subsystem, wherein the transmitting subsystem is configured to modulate network information onto a carrier of a satellite operating band, amplify the network information with high power, and transmit the amplified network information to the first low-orbit satellite through the antenna subsystem. The antenna subsystem is similar to a big pot in shape, faces to a low orbit satellite, is generally 10 meters or 30 meters in diameter, and comprises an antenna, a feeding part, a tracking part and a driving part. In this embodiment, the satellite operating bands include a Ku band (12-18GHz), a Ka band (27-40GHz), and a V band.
In some embodiments, the ground station further includes a receiving subsystem and a power subsystem, wherein the receiving subsystem is configured to receive signals transmitted by the satellite, amplify the signals, detect the signals, and transmit the amplified signals to the corresponding terminal device; the power supply subsystem is used for providing power supply for the ground station.
In some embodiments, the performance index G/T value of the ground station is an important technical performance index reflecting the ground station receiving system, where G is the receiving antenna gain, T is the equivalent noise temperature representing the noise performance of the receiving system, and a larger G/T value indicates a better performance of the ground station receiving system.
In some embodiments, as shown in fig. 3, the terminal device 30 includes a built-in satellite signal antenna 31, where the satellite signal antenna includes a microstrip antenna, a Ku-band antenna unit and a Ka-band antenna unit, the Ku-band antenna unit is located on the bottom layer by using a coupling feed slot antenna, and the Ka-band antenna unit is located on the top layer by using a side feed microstrip antenna. In this embodiment, the terminal device 30 receives a signal transmitted by a low-orbit satellite through the satellite signal antenna 31.
In some embodiments, as shown in fig. 3, the terminal device 30 provided in this embodiment further includes a low noise amplifier 32, a frequency converter 33, and an error correction decoder 34 electrically connected in sequence, and an audio decoder 35, a video decoder 36, and a memory 37 electrically connected to the error correction decoder 34 respectively.
In particular, the network information may be streaming media, web portals, video signals and audio signals. For example, as shown in fig. 3, when the network information includes a video signal and a network signal, the ground station converts the network information into a satellite signal through a protocol and sends the satellite signal to a low-orbit satellite, the low-noise amplifier 32, the frequency converter 33, and the error correction decoder 34 in the terminal device 30 may sequentially perform noise reduction amplification, frequency conversion, and demodulation on the received satellite signal, the demodulated audio signal and the video signal are sent to the audio decoder 35 and the video decoder 36, respectively, and the audio decoder 35 is electrically connected to a power amplifier device 38 for playing the audio signal, such as a speaker; the video decoder 36 is electrically connected to a display screen 39 for playing video. In this embodiment, the memory 37 is used for storing decoded network information.
In some embodiments, the terminal device is one of a mobile phone, a computer, a tablet or a television, but is not limited thereto.
In some embodiments, there is also provided a communication method based on an internet communication system, as shown in fig. 4, which includes the steps of:
s10, the terminal equipment sends a network access request to the ground station through the second low orbit satellite and the first low orbit satellite in sequence;
and S20, the terminal equipment receives the network information sent from the ground station, decodes the network information and outputs the decoded network information.
Specifically, when a user sends a network access request through a terminal device, a server transmits the requested network information to the ground station, the ground station uploads the network information to a first orbit satellite closest to the ground station through a protocol, the first orbit satellite searches for a second orbit satellite closest to the terminal device through laser, the first orbit satellite transmits the network information to the second orbit satellite, the second orbit satellite transmits the network information to the terminal device 30, and finally the terminal device decodes and outputs the received network information to complete one-time data communication.
In summary, in the internet communication system based on the low-orbit satellite provided by the present invention, the ground station uploads the network information to the first low-orbit satellite closest to the ground station, the first low-orbit satellite sends the network information to the second low-orbit satellite closest to the terminal device, and the terminal device receives the network information, decodes the network information, and outputs the decoded network information. According to the invention, the low-orbit satellite is adopted to replace an optical fiber, and the ground terminal equipment and the satellite internet are fused by constructing an internet communication system based on the low-orbit satellite, so that the ground network coverage is realized; the internet communication system provided by the invention can provide stable communication when natural disasters such as earthquakes and typhoons occur.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides an internet communication system based on low orbit satellite, its characterized in that, including the ground satellite, with the ground station is nearest first low orbit satellite, terminal equipment, and with the terminal equipment is nearest second low orbit satellite, the ground station is used for uploading network information to first low orbit satellite, first low orbit satellite be used for with network information sends to second low orbit satellite, second low orbit satellite be used for with network information sends to terminal equipment, terminal equipment receives network information and to export after decoding network information.
2. The internet communication system based on low-orbit satellites as claimed in claim 1, wherein the terminal device comprises a built-in satellite signal antenna including a microstrip antenna, a Ku band antenna element and a Ka band antenna element.
3. The internet communication system based on low-orbit satellites as claimed in claim 2, wherein the terminal device further comprises a low noise amplifier, a frequency converter and an error correction decoder electrically connected in sequence, and an audio decoder, a video decoder and a memory electrically connected with the error correction decoder respectively.
4. The internet communication system based on low-orbit satellites of claim 1, wherein the ground station comprises an antenna subsystem and a transmitting subsystem, wherein the transmitting subsystem is used for modulating network information onto a carrier wave of a satellite operating band, amplifying the network information with high power and transmitting the network information to the first low-orbit satellite through the antenna subsystem.
5. The low-orbiting satellite based internet communications system of claim 4, wherein the satellite operating bands include the Ku band, the Ka band, and the V band.
6. The low-orbiting satellite based internet communication system as claimed in claim 4, wherein said network information includes video signals and audio signals.
7. The internet low-orbiting satellite based communication system as claimed in claim 4, further comprising a server for establishing a communication link with a ground station, the server being adapted to transmit network information to the ground station.
8. The low-orbiting satellite based internet communications system as claimed in claim 1, wherein the transmitting altitude of the first low-orbiting satellite and the second low-orbiting satellite is 500-.
9. A communication method based on the internet communication system according to any one of claims 1 to 8, comprising the steps of:
the terminal equipment sends a network access request to the ground station through the second low-orbit satellite and the first low-orbit satellite in sequence;
and the terminal equipment receives the network information sent from the ground station, decodes the network information and then outputs the decoded network information.
10. A terminal device is characterized in that the terminal device comprises a built-in satellite signal antenna, a low noise amplifier, a frequency converter and an error correction decoder which are electrically connected in sequence, and an audio decoder, a video decoder and a memory which are respectively and electrically connected with the error correction decoder.
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| CN202010751746.1A CN111756430A (en) | 2020-07-30 | 2020-07-30 | Internet communication method, system and terminal equipment based on low-orbit satellite |
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| CN202010751746.1A CN111756430A (en) | 2020-07-30 | 2020-07-30 | Internet communication method, system and terminal equipment based on low-orbit satellite |
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