WO2018184489A1

WO2018184489A1 - Very small aperture terminal

Info

Publication number: WO2018184489A1
Application number: PCT/CN2018/080658
Authority: WO
Inventors: 叶雷; 王浩
Original assignee: 泛太通信导航有限公司
Priority date: 2017-04-05
Filing date: 2018-03-27
Publication date: 2018-10-11
Also published as: CN106972883B; CN106972883A

Abstract

Provided in the present application is a very small aperture terminal. The very small aperture terminal comprises an outdoor unit and an indoor unit. The outdoor unit comprises: a satellite antenna; a plurality of receivers, respectively communicatively connected to the satellite antenna to achieve various satellite data communication functions; an asynchronous serial interface hub, respectively connected to the plurality of receivers through multiple asynchronous serial interfaces; a first communication device, used to establish network connections with the plurality of receivers and the asynchronous serial interface hub, respectively, and transmit satellite data from the plurality of receivers to the indoor unit; and a first power-supply device, used to power the above devices within the outdoor unit. The indoor unit comprises: an information processing device, used to process the satellite data from the plurality of receivers; a second communication device, used to establish a network connection with the first communication device and the information processing device, and receive the satellite data from the first communication device and transmit the same to the information processing device; and a second power-supply device, used to power the above devices within the indoor unit.

Description

Small satellite ground station

The present application claims priority to Chinese Patent Application No. PCT Application No. No. No. No. No. No. No. No. No. No.

Technical field

The application relates to the field of satellite communications, and in particular to a small satellite ground station.

Background technique

There are many types of traditional satellite ground stations, and small satellite ground stations generally only perform functions such as observation and relay. One of the most typical small satellite ground stations is the satellite communication gateway (Gateway Station), which functions to connect satellite signals of satellite communication systems to terrestrial communication networks, such as satellite telephones to terrestrial wired telephone networks, or satellites. Broadband data access to the terrestrial fiber network, which completes the interpretation, conversion and exchange of information with the terrestrial network of the satellite communication system signaling protocol. These satellite communication gateways are mainly for satellite communication services and rarely carry other functional loads. For example, Shula Thuraya plans to build a gateway station in Miyun District of Beijing and a gateway station built by Inmarsat in Hawaii.

Another typical small satellite ground station is used for a satellite differential reference station, also known as a reference station. The satellite differential positioning reference station is installed at a known point where the position has been accurately determined. The station is equipped with a satellite positioning receiver and the user simultaneously performs a Global Navigation Satellite System (GNSS) observation, and the receiver will receive a single point. The result of the positioning is compared with the coordinates of the base station, and the real-time differential correction value is solved, and the differential correction value is transmitted to the nearby GNSS user in a broadcast or data link transmission manner to correct the GNSS positioning solution and improve the positioning accuracy of the user in the local range. This method can improve the user's real-time single-point positioning accuracy to the meter level.

At present, the functions of small satellite ground stations are independent, as satellite communication gateways or as satellite differential positioning reference stations. In the current situation where multiple satellite systems coexist, the demand for sharing resources between users of different satellite systems is very strong; in addition, the use of a single function of an outdoor satellite facility land and power system also causes waste of land and power resources.

Summary of the invention

In view of this, the embodiment of the present application provides a small satellite ground station to solve the technical problem of single function of the small and medium satellite ground station in the prior art.

According to an aspect of an embodiment of the present application, a small satellite ground station is provided, including an outdoor unit and an indoor unit, wherein the outdoor unit includes: a satellite antenna; and a plurality of receivers respectively connected to the satellite antenna and Implementing different satellite data communication functions; an asynchronous serial interface hub connecting the plurality of receivers through a plurality of asynchronous serial interfaces; the first communication device is respectively established with the plurality of receivers and the asynchronous serial interface hub a network connection, transmitting satellite data from the plurality of receivers to the indoor unit; and a first power supply device supplying power to the device inside the outdoor unit;

The indoor unit includes: an information processing device that processes satellite data from the plurality of receivers; and a second communication device that establishes a network connection with the first communication device and the information processing device, and receives the first Satellite data of the communication device is transmitted to the information processing device; and the second power device supplies power to the device inside the indoor unit.

The beneficial effects of the embodiments of the present application include: multiple receivers of the outdoor unit respectively receive communication data of different satellite systems, and multiple receivers are respectively connected to the asynchronous serial interface hub to transmit the received data to the information processing of the indoor unit The device enables the small satellite ground station to have a variety of different satellite communication functions at the same time, and has been improved in terms of practicability and use efficiency, and the method of comprehensively utilizing multi-source data for system availability verification and redundant configuration is also The reliability and availability of satellite systems for users have been improved, and the utilization of satellite facilities and power systems has also increased.

DRAWINGS

The above and other objects, features and advantages of the present application will become more apparent from

1 is a schematic diagram of the principle of a small satellite ground station provided by an embodiment of the present application;

2 is a schematic diagram of the principle of a small satellite ground station provided by an embodiment of the present application;

3 is a schematic diagram of an outdoor unit of a small satellite ground station provided by an embodiment of the present application.

detailed description

The present application is described below based on the embodiments, but the present application is not limited to only these embodiments. In the following detailed description of the application, some specific details are described in detail. The description of these details is also not fully understood by those skilled in the art. In order to avoid obscuring the essence of the application, well-known methods, procedures, procedures, components and circuits are not described in detail.

In addition, the drawings are provided for the purpose of illustration, and the drawings are not necessarily to scale.

Also, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one component or subcircuit by electrical or electromagnetic connection. When an element or circuit is referred to as "connected to" another element or the element / circuit is "connected" between the two means, it may be directly coupled or connected to the other element or Connections can be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is meant that there are no intervening elements.

Unless explicitly required by the context, the words "including", "comprising", and the like in the claims and the claims should be interpreted as meanings of meaning rather than exclusive or exhaustive meaning; that is, "including but not limited to" The meaning.

In the description of the present application, it is to be understood that the terms "first", "second" and the like are used for the purpose of description only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" is two or more unless otherwise stated.

The outdoor unit of the small satellite ground station provided by the embodiment of the present application includes a plurality of receivers and an asynchronous serial interface hub, and the plurality of receivers are respectively used to implement the functions of the satellite communication gateway station and the differential positioning reference station, and the plurality of receivers The outputs are respectively connected to the asynchronous serial interface hub through a serial interface, and the plurality of receivers and the asynchronous serial interface hub are in the same local area network, so that the information processing device of the indoor unit can simultaneously process the satellite communication data received by the plurality of receivers. Thereby achieving different satellite communication functions at the same time. The small satellite ground station can have both a satellite communication gateway function and a satellite differential positioning base station function. The outdoor unit and the indoor unit of the small satellite ground station in the embodiment of the present application can also form a wireless distributed system through the wireless router, the outdoor unit and the indoor unit are in the same local area network, and the indoor and outdoor units can also be in a construction environment that is far apart. Realize the function of the satellite ground station.

1 is a schematic block diagram of a small satellite ground station including an outdoor unit 1 and an indoor unit 2, and an outdoor unit 1 including a satellite antenna 10, a receiver 11, an asynchronous serial interface, according to an embodiment of the present invention. The hub 12, the first communication device 13 and the first power device 14. The number of receivers 11 is at least two, respectively, to achieve different satellite data communication functions, enabling small satellite ground stations to simultaneously undertake different satellite communication functions. A plurality of receivers 11 are respectively connected to the satellite antenna 10 via a radio frequency feeder and receive data, and are respectively connected to the asynchronous serial interface hub 12 through a serial interface. The asynchronous serial interface hub 12 and the receiver 11 respectively establish an Ethernet (Ethernet) connection with the first communication device 13, so that the asynchronous serial interface hub 12, the receiver 11 and the first communication device 13 are in the same local area network. The first power supply device 14 supplies power to the above-mentioned devices inside the outdoor unit 1. For example, the first power supply device 14 is an external power supply (UPS) that is externally connected to 220V or 380V.

The outdoor unit 2 includes an information processing device 20, a second communication device 21, and a second power device 22. The second communication device 21 establishes an Ethernet connection with the information processing device 20 and the first communication device 13 of the outdoor unit 1, thereby transmitting satellite data received by the plurality of receivers 11 to the information processing device 20 inside the indoor unit 2, The information processing device 20 performs processing of a plurality of corresponding satellite communication data. For example, one of the receivers 11 receives text, voice, and data information of three types of satellite communication systems, such as Thuraya, Radio Determination Satellite Service (RDSS), and Orbital Communications Corporation (ORBCOMM), and The satellite communication gateway function can be completed by transmitting a message or establishing a voice connection to a receiver of a satellite communication system such as Thuraya, Beidou RDSS, ORBCOMM, etc.; another receiver 11 can receive a Global Positioning System (GPS), Radio Navigation Satellite System (RNSS), Galileo satellite navigation system, GLONASS satellite navigation system, Satellite-Based Augmentation System (SBAS), quasi-zenith The navigation message and the ranging observation value of the satellite navigation and positioning system such as the satellite system (Quasi-Zenith Satellite System, QZSS) are calculated by the information processing device 20, the corresponding differential correction value is calculated, or the network carrier phase difference technology is performed (Real -time kinematic,RTK) calculation, then Broadcasting the differential correction value to complete the satellite differential positioning reference station function; simultaneously or separately, according to the received broadcast message and signal quality estimation value from the satellite communication system or the satellite navigation and positioning system, the information processing device 20 performs satellite Data analysis and processing such as system availability verification, optimal communication channel selection, and communication channel quality estimation. The information processing device 20 may be a standard server built inside the indoor unit 2, such as a Windows Server server, on which different satellite communication functions are implemented by deploying different WebService services. The second power supply device 22 supplies power to the above-mentioned devices inside the indoor unit 2, for example, an external uninterruptible power supply (UPS) of 220V or 380V.

In this embodiment, the plurality of receivers of the outdoor unit respectively receive communication data of different satellite systems, and the plurality of receivers are respectively connected to the asynchronous serial interface hub to transmit the received communication data to the information processing device of the indoor unit, thereby The small satellite ground station can simultaneously have a variety of different satellite communication functions, and has been improved in terms of practicability and use efficiency, and comprehensively utilizing multi-source data for system availability verification and redundant configuration also improves the use of satellites by users. System reliability. The use of the same satellite ground station to implement a variety of different satellite communication functions also contributes to the utilization of satellite facilities and power systems.

In one embodiment, one receiver 11 is configured to receive text, voice, and data information of a satellite communication system, and another receiver 11 is configured to receive navigation information, ranging observations, and the like of the satellite positioning system. The small satellite ground station has both satellite communication gateway functions and satellite differential positioning reference stations. The construction efficiency of satellite ground stations and the utilization rate of satellite ground station construction resources have been improved. Wherein, the receiver for the satellite communication system may be a command type receiver, such as a Beidou command type receiver, and the command receiver can receive the positioning of other receivers under the jurisdiction, in addition to the functions of the ordinary receiver. Communication information, and send multicast and multicast information to the receivers under its jurisdiction, thereby implementing group management and centralized scheduling functions for sub-users. The receiver for the satellite positioning system can be a geodetic GNSS receiver, and the geodetic GNSS receiver is suitable for scenes with high positioning accuracy such as precision geodesy and precision engineering measurement.

In one embodiment, the outdoor unit is further equipped with a waterproof cabinet and an antenna fixture. The plurality of receivers of the outdoor unit, the asynchronous serial interface hub, the first communication device and the first power supply device are integrated inside the waterproof cabinet. The satellite antenna is mounted on the antenna fixing device, and the antenna fixing device is disposed outside the waterproof cabinet. The antenna fixing device may be a columnar or rod of a metal material such as stainless steel, and is fixedly disposed beside the waterproof cabinet, so that the satellite antenna can pass through the feeder. Satellite signals are introduced into the waterproof cabinet and connected to multiple receivers. This protects the outdoor unit's equipment from outdoor rainy weather and humid environments.

In order to make the waterproof cabinet and antenna fixing device installed outdoors more stable, when deploying the outdoor unit in the outdoor area at the top of the building, for example, on the roof or roof of the building, a concrete base can be laid first to fix the waterproof cabinet and the antenna. Installed on the concrete base, the external mains power is introduced from the concrete base to the first power supply inside the waterproof cabinet. The antenna fixture can also be further fixedly attached to the railing or exterior wall of the outdoor area at the top of the building by fasteners, thereby making the antenna fixture more stable.

In the embodiment of the present application, a communication connection may be established by using a feeder between the first communication device of the outdoor unit and the second communication device of the indoor unit. For example, the first communication device and the second communication device are wired Ethernet routers, and are configured. The wired Ethernet router connects the receiver of the outdoor unit, the asynchronous serial interface hub, and the information processing device of the indoor unit to the same local area network, so that the information processing device can operate all the devices disposed in the outdoor unit based on the local area network connection. Similarly, the first communication device and the second communication device may also be wireless Ethernet routers, and the communication between the outdoor unit and the indoor unit is established by using the wireless network.

When the wireless unit is used for communication between the outdoor unit and the indoor unit, the wireless unit of the outdoor unit and the indoor unit can form a Wireless Distribution System (WDS). The two wireless routers can form the wireless distributed system by means of wireless bridging or wireless relay. In order to keep the wireless signal stable, the wireless router of the indoor unit is generally used as the primary access point, and the wireless router of the outdoor unit is set to the relay mode or the bridge mode, so that the device of the outdoor unit is connected to the local area network of the indoor unit. Wireless routers can have both wireless routing and Ethernet hub capabilities; they can also separate the functionality of wireless routers from Ethernet hubs for wireless signals and the stability of outdoor wired transmissions. At this time, the first communication device of the outdoor unit includes a first wireless router and a first Ethernet hub, and the first wireless router is connected to a Wide Area Network (WAN) port of the first Ethernet hub through a feeder, and a receiver of the outdoor unit And the Ethernet port of the asynchronous serial interface hub is connected to the local area network (LAN) port of the first Ethernet hub through the feeder; the second communication device of the indoor unit includes the second wireless router and the second Ethernet hub, and is connected The mode is the same as that of the outdoor unit, and the description will not be repeated here. The block diagram of a small satellite ground station using such a wireless distributed system is shown in FIG. 2. The outdoor unit 1 includes a satellite antenna 10, a receiver 11, an asynchronous serial interface hub 12, a first wireless router 131, and a first Ethernet. The hub 132 and the first power device 14; the indoor unit 2 includes an information processing device 20, a second wireless router 211, a second Ethernet hub 212, and a second power device 22. The first wireless router 131 and the second wireless router 211 form a wireless distributed system such that the receiver 11, the asynchronous serial interface hub 12, the first Ethernet hub 132, the information processing device 20, and the second Ethernet hub 212 are in the same local area network. The information processing device 20 can operate the receiver 11, the asynchronous serial interface hub 12, and the first Ethernet hub 132, etc. of the outdoor unit 2 based on the local area network connection.

If the outdoor unit 1 and the indoor unit 2 are communicably connected by means of a radio frequency feeder, they may be disposed in the same building; if the wireless communication connection is adopted, the outdoor unit 1 and the indoor unit 2 may be deployed in the same building. They can also be set up in different buildings. At present, it is very difficult to build a small satellite ground station without infrastructure construction on a building that has been completed and put into use for a long time. In many buildings with strict management, construction restrictions are very large, and it is impossible to carry out large Scale wiring and concrete renovation. Therefore, the traditional satellite ground station construction method is not suitable for the construction environment of many satellite ground stations under current conditions. In the embodiment of the present application, the method of establishing a communication connection between the outdoor unit 1 and the indoor unit 2 by using a wireless distributed system can well solve the above problems, and does not need to re-execute a large amount of wiring in a building that has been put into use for a long time, according to At present, the signal strength of the industrial-grade wireless Ethernet transceiver can set the linear distance between the outdoor unit 1 and the indoor unit 2 within 500 meters, and the linear distance can be further improved with the advancement and development of related technologies. . Therefore, it is also possible to separately deploy the outdoor unit 1 and the indoor unit 2 in different buildings, for example, two buildings adjacent to each other (A building and B building).

In one embodiment, the receiver 11 of the outdoor unit 1, the asynchronous serial interface hub 12, the first Ethernet hub 132 and the first power supply device 14 are integrated inside the waterproof cabinet, and the satellite antenna 10 is mounted on the antenna fixture And introducing a satellite signal into the waterproof cabinet through a feeder to connect with the plurality of receivers 11. To ensure the stability and reliability of wireless communication between the outdoor unit 1 and the indoor unit 2, the first wireless router 131 is also mounted on the antenna fixture and connected to the first Ethernet hub 132 in the waterproof cabinet through the feeder. The information processing device 20, the second Ethernet hub 212, and the second power device 22 of the indoor unit 2 are integrated in the service cabinet, and also to ensure the stability and reliability of wireless communication between the outdoor unit 1 and the indoor unit 2, The second wireless router 211 is disposed outside the service cabinet, is introduced into the service cabinet through a feeder, and is connected to the second Ethernet hub 212.

In order to make the waterproof cabinet and antenna fixing device installed outdoors more stable, when deploying outdoor units in the outdoor area at the top of the building, for example, on the roof or roof of the building, a concrete base can be laid first, and the waterproof cabinet and antenna will be installed. Fixedly installed on the concrete base, the external mains power is introduced from the concrete base to the first power supply inside the waterproof cabinet. The antenna fixture can also be further fixedly attached to the railing or exterior wall of the outdoor area at the top of the building by fasteners, thereby making the antenna fixture more stable.

The outdoor unit using the wireless distributed system is shown in Fig. 3. The concrete base 30 is laid in the outdoor area at the top of the building, and the waterproof cabinet 31 and the antenna column 32 are fixedly mounted on the concrete base 30. The antenna posts 32 are fixedly coupled to the rails 34 and the outer wall 35 of the outdoor top region by fasteners 33, respectively, to further enhance stability. An antenna platform 36 is mounted on top of the antenna post 32, and the antenna platform 36 and the antenna post 32 are fixedly coupled by fasteners 33. The satellite antenna 37 is fixedly mounted on the antenna platform 36 for transmitting and receiving satellite signals, and the satellite signals are introduced into the waterproof cabinet 31 through the RF feeder. A crossbar 38 is also provided on the antenna post 32. The crossbar 38 is typically disposed below the antenna platform 36 and is fixedly coupled to the antenna post 32 by fasteners 33. The wireless router 39 is fixedly mounted on the crossbar 38 for forming a wireless distributed system with the wireless router of the indoor unit. The wireless router 39 is introduced into the waterproof cabinet 31 through the feeder to connect with the Ethernet hub. The antenna post 32, the antenna platform 36, the crossbar 38, and the fastener 33 may be made of a metal material such as stainless steel.

In this embodiment, the outdoor unit and the indoor unit form a wireless distributed system through a wireless router, thereby implementing a method for constructing a distributed small satellite ground station. Devices that are deployed in different locations of a building, or devices deployed in different buildings, are connected in the same LAN, and all devices are connected and interoperated in a LAN mode. The construction method is suitable for deploying the multifunctional small-scale satellite ground station provided by the embodiment of the present application in a group of buildings that have been put into use, and can construct a small satellite ground station in a construction environment where the indoor unit and the outdoor unit are far apart, and improve The construction efficiency and flexibility of small satellite ground stations.

The above description is only a preferred embodiment of the present application, and is not intended to limit the present application. Various changes and modifications may be made to the present application. Any modifications, equivalents, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims

A small satellite ground station, comprising: an outdoor unit and an indoor unit, wherein the outdoor unit comprises:

Satellite Antenna;

a plurality of receivers respectively connected to the satellite antenna and implementing different satellite data communication functions;

An asynchronous serial interface hub, the plurality of receivers being respectively connected through a plurality of asynchronous serial interfaces;

a first communication device respectively establishing a network connection with the plurality of receivers and an asynchronous serial interface hub to transmit satellite data from the plurality of receivers to the indoor unit;

a first power supply device that supplies power to the device inside the outdoor unit;

The indoor unit includes:

An information processing device that processes satellite data from the plurality of receivers;

a second communication device, establishing a network connection with the first communication device and the information processing device, receiving satellite data from the first communication device, and transmitting the data to the information processing device;

The second power supply device supplies power to the device inside the indoor unit.
The small satellite earth station of claim 1 wherein said plurality of receivers comprises:

A first receiver for a satellite communication gateway station and a second receiver for a satellite differential positioning reference station.
The small satellite earth station of claim 2 wherein said first receiver is a commanded receiver and said second receiver is a geodetic GNSS receiver.
The small satellite earth station according to claim 2, wherein said first receiver is configured to receive text, voice and data information of three satellite communication systems of Thuraya, Beidou RDSS and ORBCOMM, and to Thuraya, Beidou RDSS. Receives a message or establishes a voice connection with the receivers of the three satellite communication systems of ORBCOMM.
The small satellite earth station according to claim 2, wherein said second receiver is configured to receive a plurality of satellite navigation and positioning in GPS, Beidou RNSS, GALILEO satellite navigation system, GLONASS satellite navigation system, SBAS and QZSS The system's navigation message and ranging observations.
The small satellite earth station according to claim 1, wherein said outdoor unit further comprises a waterproof cabinet and an antenna fixing device;

The plurality of receivers, the asynchronous serial interface hub, the first communication device and the first power supply device are integrated inside the waterproof cabinet; the antenna fixing device is disposed outside the waterproof cabinet; the satellite antenna is installed at the The antenna fixture is connected to the plurality of receivers by introducing satellite signals into the waterproof cabinet through the feeder.
The small satellite earth station according to claim 1, wherein a feeder connection is used between the first communication device and the second communication device, or wireless communication between the first communication device and the second communication device is adopted. Communication connection.
A small satellite earth station according to claim 7, wherein

When the first communication device and the second communication device are connected by wireless communication, the first communication device includes a first wireless router, and the second communication device includes a second wireless router; the first wireless router and the second wireless The router forms a wireless distributed system that covers the outdoor unit and the indoor unit within the same local area network.
A small satellite earth station according to claim 8 wherein:

The outdoor unit further includes a waterproof cabinet and an antenna fixing device;

The plurality of receivers, the asynchronous serial interface hub and the first power supply device are integrated inside the waterproof cabinet; the antenna fixing device is disposed outside the waterproof cabinet; and the satellite antenna is mounted on the antenna fixing device And introducing, by the feeder, a satellite signal into the waterproof cabinet to be connected to the plurality of receivers; the first wireless router is mounted on the antenna fixing device, and is introduced into the waterproof cabinet through the feeder line and the plurality of a receiver and an asynchronous serial interface hub establish a communication connection;

The indoor unit further includes a service cabinet;

The information processing device and the second power device are integrated inside the service cabinet, and the second wireless router is disposed outside the service cabinet, and the service cabinet is introduced into the service cabinet through a feeder to establish a communication connection with the information processing device.
The small satellite ground station according to claim 6 or 9, wherein the waterproof cabinet and the antenna fixing device are fixedly mounted on a concrete base laid in an outdoor area at the top of the building, and the antenna fixing device passes the fastener A fixed connection to the railing and/or the exterior wall of the outdoor area at the top of the building.
The small satellite ground station according to claim 9, wherein the antenna fixing device comprises an antenna column, an antenna platform and a crossbar; the waterproof cabinet and the antenna column are fixedly mounted on a concrete base, the antenna column The fasteners are respectively fixedly connected to the railing and the outer wall of the outdoor top area; the antenna platform is used for installing a satellite antenna, and is fixedly connected with the antenna column through a fastener; the crossbar is used for installing a wireless router, and is fastened by fastening The piece is fixedly connected to the antenna column.
The small satellite earth station according to claim 8, wherein the linear distance between the indoor unit and the indoor unit is less than or equal to 500 meters.
A small satellite earth station according to claim 8, wherein said outdoor unit is deployed in a first building, said indoor unit being deployed in a second building.