CN111398999A - User terminal and search and rescue system based on low-orbit communication constellation - Google Patents
User terminal and search and rescue system based on low-orbit communication constellation Download PDFInfo
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- CN111398999A CN111398999A CN202010218020.1A CN202010218020A CN111398999A CN 111398999 A CN111398999 A CN 111398999A CN 202010218020 A CN202010218020 A CN 202010218020A CN 111398999 A CN111398999 A CN 111398999A
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- 238000004891 communication Methods 0.000 title claims abstract description 51
- 230000003993 interaction Effects 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 4
- 230000001413 cellular effect Effects 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 description 6
- 230000009429 distress Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
- G01S19/17—Emergency applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
- G01S19/421—Determining position by combining or switching between position solutions or signals derived from different satellite radio beacon positioning systems; by combining or switching between position solutions or signals derived from different modes of operation in a single system
- G01S19/425—Determining position by combining or switching between position solutions or signals derived from different satellite radio beacon positioning systems; by combining or switching between position solutions or signals derived from different modes of operation in a single system by combining or switching between signals derived from different satellite radio beacon positioning systems
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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
- H04B7/18517—Transmission equipment in earth stations
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
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Abstract
The invention discloses a search and rescue system based on a low-orbit communication constellation, which comprises a space network section consisting of the low-orbit communication constellation, a ground network section consisting of a gateway station, a satellite control center and a network control center, and a user section. The user terminal in the user segment is integrated into the mobile device in a miniaturized terminal mode, and the terminal integrates a navigation module and a communication module and is provided with a high-gain expandable antenna and a high-energy power supply battery.
Description
Technical Field
The invention relates to the technical field of aerospace, in particular to a user terminal search and rescue system based on a low-orbit communication constellation.
Background
With the improvement of living standard of people, field exploration, tourism or operation are more and more extensive, but the safety problem that comes with is more and more, therefore, it is very important to develop a set of efficient search and rescue system. For the search and rescue system, on one hand, related organizations or organizations can quickly locate dangerous beacons and quickly schedule rescue teams to rescue more people through the search and rescue system, and on the other hand, individuals can send rescue signals and position coordinates to the search and rescue system at any time and any place through terminal equipment.
The mainstream scheme of the current search and rescue system is a position tracking technology and an emergency rescue technology based on satellite network communication. The system is based on a space-based system, utilizes satellites to detect distress signals sent by marine, aerial and ground position indicators, has wide coverage range, is not influenced by weather and climate, can work all the day long and can still work normally even under emergency conditions such as natural disasters and emergencies. In addition, a special information transmission channel is adopted, the safety and the confidentiality are high, meanwhile, a large-scale ground tower base station is not needed, and the operation cost is low. The most widely used at present comprise a global satellite search and rescue system and a Beidou rescue system.
The Beidou rescue system mainly comprises a ground emergency rescue command center, a mobile emergency rescue command sub-center and an emergency rescue individual soldier system. The short message-based emergency command system can realize uploading and issuing of images, voice and related data by depending on a communication satellite and other auxiliary communication equipment, and realize accurate determination of short message-based emergency command and comprehensive display by depending on a Beidou positioning navigation communication satellite. When a serious disaster accident occurs, the Beidou rescue system can realize bidirectional transmission of communication, images, data and position information and unified command and scheduling of the system, guarantee the smoothness of a command and scheduling network which is vertical to emergency rescue work and is arranged from top to bottom, and improve the command and scheduling capability on an emergency site. However, at present, the Beidou satellite is small in number, the short message system is small in channel number, and the terminal of the Beidou satellite needs to have larger transmitting power, is larger in size and higher in price, so that the client mainly facing to the Beidou satellite is military and government departments at present, is difficult to popularize and popularize on a large scale, and is difficult to meet large-scale search and rescue services in the future.
The global satellite search and rescue system (COSPAS/SARSAT system) jointly developed by Canada, France, United states and the former Soviet Union is used as an important component of a global maritime distress and safety system promoted by the international maritime satellite organization, and low-altitude satellites are used for providing distress alarm and positioning service for maritime, land and air including polar regions globally, so that victims can be effectively rescued in time. Although it can provide global satellite search and rescue services for users in the fields of navigation, aviation and land, it has insufficient global coverage due to the small number of available satellites, the time interval between two satellites flying over the same area can reach 1.5 hours at the maximum, and the optimal rescue time may be missed for the targets in distress. In addition, the system only has a beacon function, positioning required by search and rescue and accident scene conditions are difficult to provide, bidirectional information interaction cannot be performed, and positioning is performed by a Doppler frequency shift measurement mode by adopting analog frequencies of 121.5MHz and 406MHz, so that the positioning accuracy is not high. And the price of the terminal and the price of the sign for personal distress are high, so that the terminal mainly provides services for key departments of governments, military institutions, high-tech fields, national important economic departments, sports expeditions and high-level people of large companies, and is difficult to popularize on a large scale.
Disclosure of Invention
To address some or all of the problems of the prior art, an aspect of the present invention provides a personal user terminal based on a low-earth communication constellation, including:
the navigation module is used for acquiring user position information;
the communication module is used for performing bidirectional information interaction with a communication constellation, and comprises a beacon sending module;
an antenna for transmitting and receiving UHF and/or VHF frequency band information for communication to the antenna; and
and the power supply power of the battery is not lower than 3 watts, and the battery provides power for the user terminal.
Furthermore, the user terminal is a miniaturized terminal and is integrated in the mobile equipment of the user.
Further, the mobile device includes: laptop computers, tablet computers, Personal Digital Assistants (PDAs), smart phones, smart bracelets, and smart watches.
Further, the antenna is an unfolded antenna.
Further, the battery adopts a high-energy power supply technology and is started when the battery needs to be connected with a satellite for communication.
In another aspect of the present invention, a search and rescue system based on a low earth orbit communication constellation includes:
a spatial network segment comprising a low-rail communication constellation;
the ground network section comprises a gateway station, a satellite control center and a network control center; and
a user segment comprising:
the user terminal comprises the personal user terminal and vehicle-mounted, shipborne and airborne terminals, wherein the vehicle-mounted, shipborne and airborne terminals are arranged on a ship, an airplane or a vehicle;
and
and the communication network is in communicative connection with the network control center, so that information interaction between the ground network terminal and the user terminal is realized.
Further, the communication network includes a fixed telephone network, the internet and a cellular mobile subscriber.
The search and rescue system based on the low-orbit communication constellation provided by the invention realizes the global search and rescue function by adopting the low-orbit communication constellation, and can realize the functions of tracking the position, sending the position indicating beacon and the state information and receiving the information at any time and any position. The GNSS is used for positioning by the aid of a global navigation satellite system, and the accuracy can reach 10 m. In addition, the system is integrated into personal mobile equipment in a miniature terminal mode, is low in manufacturing cost, only needs hundreds of yuan RMB, and is beneficial to large-scale popularization.
Drawings
To further clarify the above and other advantages and features of embodiments of the present invention, a more particular description of embodiments of the present invention will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. In the drawings, the same or corresponding parts will be denoted by the same or similar reference numerals for clarity.
Fig. 1 is a schematic diagram of a search and rescue system based on low-earth-orbit communication constellations according to an embodiment of the present invention.
Detailed Description
In the following description, the present invention is described with reference to examples. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details, or with other alternative and/or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention. Similarly, for purposes of explanation, specific numbers, materials and configurations are set forth in order to provide a thorough understanding of the embodiments of the invention. However, the invention is not limited to these specific details. Further, it should be understood that the embodiments shown in the figures are illustrative representations and are not necessarily drawn to scale.
Reference in the specification to "one embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.
It should be noted that the embodiment of the present invention describes the process steps in a specific order, however, this is only for the purpose of illustrating the specific embodiment, and does not limit the sequence of the steps. Rather, in various embodiments of the present invention, the order of the steps may be adjusted according to process adjustments.
The embodiment of the invention comprises a search and rescue system based on a low-orbit communication constellation, which combines the communication function of the low-orbit communication constellation and the positioning function of a navigation satellite so as to realize position tracking and search and rescue. The system is further described with reference to the accompanying drawings of the embodiments.
Fig. 1 is a schematic diagram of a search and rescue system based on low-earth-orbit communication constellations according to an embodiment of the present invention. As shown in fig. 1, a search and rescue system based on low earth orbit communication constellation includes:
a spatial network segment 101 comprising a low-rail communication constellation;
a terrestrial network segment 102 comprising:
a gateway station 1021, configured to provide an interface between the low-rail communication constellation and a ground network segment, and implement interconnection between a space network segment and the ground network segment;
a satellite control center 1022, communicatively connected to the gateway station 1021, for acquiring and analyzing the information of the low-earth orbit communication constellation, and giving a corresponding instruction to control a satellite operating state; and
a network control center 1023 communicatively coupled to the gateway station 1021 for interconnecting the low-rail communications constellation to a subscriber segment communications network; and
a user segment 103 comprising:
a personal user terminal 1031, communicatively coupled to the low-rail communication constellation, for transmitting beacons and performing bidirectional information interaction with the low-rail communication constellation;
the vehicle-mounted, shipborne and airborne terminal 1032 is installed on a ship, an airplane or a vehicle, is in communicative connection with the low-rail communication constellation, and is used for sending beacons to the ship, the airplane or the vehicle and performing bidirectional information interaction with the low-rail communication constellation; and
and the communication network is in communicative connection with the network control center 1023, so that information interaction between the land network segment and the user terminal 1031 is realized. In one embodiment of the invention, the communication network comprises a fixed telephone network 301, the internet 302 and a cellular mobile subscriber 303.
In one embodiment of the present invention, the personal user terminal includes:
the navigation module is used for acquiring user position information;
the communication module is used for performing bidirectional information interaction with a communication constellation, and comprises a beacon sending module;
and the antenna is used for receiving and transmitting UHF and/or VHF frequency band information and is used for antenna-to-antenna communication. In an embodiment of the present invention, the antenna is a whip antenna, which can reduce the index requirement for the transmitting module and the power supply module, and the length of the antenna is hundreds of millimeters and less than 1 meter. In another embodiment of the invention, the antenna adopts a miniature high-gain expansion antenna which is folded at ordinary times and is pulled out and expanded when in use, so that the function of communication between the two antennas is realized; and
and the power supply power of the battery is not lower than 3 watts, and the battery provides power for the user terminal. In one embodiment of the invention, the battery is a rechargeable battery with higher power than a conventional battery, and the battery is started to work when in use.
In one embodiment of the present invention, the personal user terminal is a microchip integrated in a mobile device of a user. The mobile device includes: laptop computers, tablet computers, Personal Digital Assistants (PDAs), smart phones, smart bracelets, and smart watches.
While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to persons skilled in the relevant art that various combinations, modifications, and changes can be made thereto without departing from the spirit and scope of the invention. Thus, the breadth and scope of the present invention disclosed herein should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
Claims (8)
1. A user terminal based on a low-earth constellation, comprising:
a navigation module configured to acquire user location information;
a communication module configured to perform two-way information interaction with a communication constellation, including transmitting a beacon;
an antenna configured to receive and transmit UHF and/or VHF band information to enable antenna-to-antenna communication; and
a battery, the battery powered power not less than 3 watts, configured to provide power to the user terminal.
2. The user terminal of claim 1, wherein the user terminal is a miniaturized terminal integrated into a mobile device of a user.
3. The user terminal of claim 2, wherein the mobile device comprises: laptop computers, tablet computers, Personal Digital Assistants (PDAs), smart phones, smart bracelets, and smart watches.
4. The user terminal of claim 1, wherein the antenna is a whip antenna, and wherein the antenna length is less than 1 meter.
5. The user terminal of claim 1, wherein the antenna is a miniature high gain deployable antenna that is folded at ordinary times and extended when in use.
6. The user terminal of claim 1, wherein the battery is powered by a high power technology and is activated when a connection communication with a satellite is required.
7. A search and rescue system based on a low-earth-orbit communication constellation is characterized by comprising:
a spatial network segment comprising a low-rail communication constellation;
the ground network section comprises a gateway station, a satellite control center and a network control center; and
a user segment comprising:
the user terminal of any of claims 1 to 6;
the vehicle-mounted, shipborne and airborne terminals are arranged on steamships, airplanes or vehicles; and
a communication network communicably coupled to the network control center.
8. A search and rescue system as claimed in claim 7 wherein the communication network includes a fixed telephone network, the internet and a cellular mobile subscriber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010218020.1A CN111398999A (en) | 2020-03-25 | 2020-03-25 | User terminal and search and rescue system based on low-orbit communication constellation |
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| CN202010218020.1A CN111398999A (en) | 2020-03-25 | 2020-03-25 | User terminal and search and rescue system based on low-orbit communication constellation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116261146A (en) * | 2023-02-23 | 2023-06-13 | 中国人民解放军军事科学院系统工程研究院 | Global electromagnetic cooperative sensing constellation system |
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Application publication date: 20200710 |