CN204707124U - A kind of geo-synchronous orbit satellite telecommunications access systems - Google Patents

Abstract

The utility model provides a geosynchronous orbit satellite communication access system, which includes two parts: a space subsystem and a ground subsystem; the space subsystem includes at least one geosynchronous orbit satellite, and the geosynchronous orbit satellite passes through a geosynchronous orbit satellite. The transponder forwards the wireless signal of the forward link and the wireless signal of the return link; the ground subsystem includes a ground master station, a large number of satellite routers, and one or more user terminals; the ground master station communicates with third-party equipment through the Internet connection, and complete the broadcast forwarding of data to the user service area through the forward link; the coverage area of the massive satellite routers forms an independent service sub-area, and each massive satellite router provides the one or more sub-areas in its service sub-area. satellite access service for each user terminal. The system of the utility model has the characteristics of low investment, large capacity, good user experience and the like.

Description

A Geosynchronous Orbit Satellite Communication Access System

technical field

The utility model relates to satellite communication, in particular to a geosynchronous orbit satellite communication access system.

Background technique

For satellite communication systems in geosynchronous orbit, improving reverse link user capacity within limited transponder bandwidth and having a good user experience are key issues that must be solved for personal satellite communication applications. The existing geosynchronous orbit satellite communication is mainly used in special industries, such as internal information transmission of securities companies and banks. By establishing a master station and several VSAT earth stations, the master station can broadcast information to VSAT, and also provide VSAT when necessary. The information transmission function to the main station, but cannot provide personal mobile applications, which seriously restricts the development space of satellite communications.

The utility model can provide a solution for personal mobile application of satellite communication in geosynchronous orbit. The satellite communication transponder has a higher frequency band utilization rate, and can be directly interconnected with a smart phone or a tablet computer at the same time, and the user experience is good.

Utility model content

In view of the technical defects existing in the prior art, the purpose of this utility model is to provide a geosynchronous orbit satellite communication access system, which is characterized in that it includes two parts: a space subsystem and a ground subsystem; the space subsystem includes at least A geosynchronous orbit satellite, the geosynchronous orbit satellite transmits forward link wireless signals and return link wireless signals through a geosynchronous orbit satellite transponder; the ground subsystem includes a ground master station, a large number of satellite routers and One or more user terminals; the ground master station communicates with third-party equipment through the Internet, and completes the broadcast and forwarding of data to the user service area through the forward link; the massive satellite router coverage area forms an independent service Sub-areas, each massive satellite router provides the satellite access service of the one or more user terminals in its service sub-area.

Preferably, the ground master station includes a broadcast transmitting device, a massive channel receiving device, and an Internet access device, and the broadcast transmitting device, a massive channel receiving device, and an Internet access device are electrically connected respectively; the broadcast transmitting device sends a system information or obtain information from the Internet, and broadcast through the entire network through the geosynchronous orbit satellite transponder; the massive channel receiving device provides a return link signal receiving channel for receiving data sent by several of the massive satellite routers; The Internet access device connects the ground master station to the Internet.

Preferably, the mass channel receiving device provides no less than 1000 return link signal receiving channels.

Preferably, the massive satellite router includes a local transceiver, a local server, and a wireless access point, and the local transceiver, the local server, and the wireless access point are respectively connected; the local transceiver includes a transceiver antenna, a modem, and is used for Transceiving the forward link wireless signal and the reverse link wireless signal; the local server stores the data received by the local transceiver device.

The utility model has the advantages of fully utilizing geosynchronous orbit satellite transponders, with 25KHz as the return link channel bandwidth, each 36MHz transponder can provide no less than 1000 frequency-division channels, and users in the service sub-area can connect via WiFi. The system has the characteristics of low investment, large capacity and good user experience.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

Fig. 1 is a schematic diagram of the system architecture of the geosynchronous orbit satellite communication access system provided by the utility model;

Fig. 2 is a schematic diagram of transponder channel allocation of the geosynchronous orbit satellite communication access system provided by the utility model;

Fig. 3 is a schematic diagram of the composition of the ground master station module of the geosynchronous orbit satellite communication access system provided by the utility model; and

Fig. 4 is a schematic composition diagram of the satellite router module of the geosynchronous orbit satellite communication access system provided by the utility model.

Detailed ways

In order to better show the technical solution of the utility model clearly, the utility model will be further described below in conjunction with the accompanying drawings.

Figure 1 is a schematic diagram of the system architecture of the geosynchronous orbit satellite communication access system of the present invention, including: geosynchronous orbit satellites, a ground master station, several massive satellite routers and several user terminals.

Geosynchronous orbit satellite: the space subsystem of the geosynchronous orbit satellite communication access system described in the utility model, used for forwarding/returning link wireless signals, and the satellite coverage area is the geosynchronous orbit satellite described in the utility model The service area of the communication access system. At present, the space subsystem has multiple commercial geostationary orbit satellites that provide transponder rental services, such as ChinaSat 10 satellite, which includes multiple transponders with a bandwidth of 36MHz.

Ground master station: the main node of the ground subsystem of the geosynchronous orbit satellite communication access system described in the utility model, the ground master station accesses the Internet in a wired or wireless manner, and completes the broadcast of data to the user service area through the forward link Forwarding, while providing massive receiving channels to receive the return link wireless signals sent by several massive satellite routers.

Massive satellite router: the main node of the ground subsystem of the geosynchronous orbit satellite communication access system described in the utility model, the coverage area of each massive satellite router constitutes a service sub-area, and the massive satellite router provides personal satellite access services in the area . The service sub-area can be used by a single user or multiple users. Users in different sub-service areas use frequency division multiple access to transparently forward user information to the main station on the ground through the return link. After the forward link data received by massive satellite routers is stored, it is queried and used by local user terminals.

User terminal: It is the main node of the ground subsystem of the geosynchronous orbit satellite communication access system described in the utility model. The user terminal includes terminal devices such as smart phones and palmtop computers that support the 802.11 protocol. The satellite broadcasts data, and at the same time packages the personal user data that needs to be sent and sends it to the master station.

Fig. 2 is a schematic diagram of transponder channel allocation in the geosynchronous orbit satellite communication access system of the present invention.

According to the "Regulations of the People's Republic of China on Radio Frequency Allocation" (version 2014), 12.2-12.5 (12.75) GHz is considered as the selection range of the downlink frequency band, and 14-14.25 (14.3) GHz is used as the selection range of the uplink frequency band.

In Figure 2, it is assumed that a transponder has a bandwidth of 36MHz, a forward channel rate of 5Mbps, QPSK modulation, channel coding and shaping filtering, and occupies a bandwidth of about 5MHz; the remaining 31MHz bandwidth of the transponder is frequency-divided into 1240 channels of 25KHz (including The guard interval between channels), and each channel transmits a wireless signal with QPSK modulation. The transponder adopts the SCPC/FDMA method to provide a total of 1240 user uplink channels, and the user uplink channels that multiple transponders can provide increase in proportion.

Fig. 3 is a schematic diagram of the composition of the ground master station module of the geosynchronous orbit satellite communication access system of the present invention, including a broadcast transmitting device, a mass channel receiving device, and an Internet access device.

Broadcast transmitter: used to send forward link broadcast signals, and the signals are broadcast through the whole network of geosynchronous orbit satellite transponders. The broadcast transmitting device mainly includes an antenna, a transmitting channel and a modulator, etc., and modulates data from the Internet or system monitoring data before sending.

Massive channel receiving device: Provide no less than 1000 return link signal receiving channels for receiving each frequency division channel data forwarded by the return channel of the satellite transponder. The mass-channel receiving device mainly includes an antenna, a receiving channel, and mass-channel baseband receiving demodulation equipment, and the demodulated data is stored and/or transmitted to the Internet through the Internet access device.

Internet access device: used to connect the system to the Internet, usually a network computer or server including a network adapter.

Fig. 4 is a schematic diagram of the mass satellite router module composition of the geosynchronous orbit satellite communication access system of the utility model, including a local transceiver device, a local server, and a wireless AP.

Local transceiver device: including transceiver antenna, modem, etc., used for forward/return link wireless signal transmission and reception, through the local transceiver device, the forward link signal broadcast by the ground master station through the satellite transponder can be received and demodulated , and at the same time, the user terminal data can be modulated and sent.

Local server: connect the local transceiver device and the wireless AP, and store the data received by the local transceiver device for one or more local user terminals to query or use through the wireless AP; at the same time, receive and store user data through the local transceiver device through the return link way to send.

Wireless access point (wireless AP): provide wireless network access for one or more user terminals, and the user terminals access the geosynchronous orbit satellite communication system described in the utility model through the wireless AP. At present, most wireless APs based on the 802.11 protocol Both support multi-user access.

The specific embodiments of the present utility model have been described above. It should be understood that the utility model is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the utility model.

Claims (4)

1. a geo-synchronous orbit satellite telecommunications access systems, is characterized in that, comprises space subsystem and ground subsystem two parts; Described space subsystem comprises at least one geo-synchronous orbit satellite, and described geo-synchronous orbit satellite forwards forward link radio signals, return link wireless signal by a geo-synchronous orbit satellite transponder; Described ground subsystem comprises ground main website, magnanimity satellite router and one or more user terminal; Described ground main website is connected with third party device communication by internet, and completes data by described forward link and forward to the broadcast of user coverage; Described magnanimity satellite router overlay area is formed and independently serves subarea, and each magnanimity satellite router provides the inserting of satellite service of described one or more user terminal in its service subarea.

2. geo-synchronous orbit satellite telecommunications access systems according to claim 1, it is characterized in that, described ground main website comprises radio transmitting device, magnanimity channel reception device, internetwork access device, and described radio transmitting device, magnanimity channel reception device, internetwork access device are electrically connected respectively; Described radio transmitting device transmitting system information or from internet obtaining information, and by described geo-synchronous orbit satellite transponder the whole network broadcast; Described magnanimity channel reception device provides return link Signal reception passage, sends data for receiving some described magnanimity satellite routers; Described internetwork access device is by Master station access internet, described ground.

3. geo-synchronous orbit satellite telecommunications access systems according to claim 2, is characterized in that, described magnanimity channel reception device provides and is not less than 1000 tunnel return link Signal reception passages.

4. geo-synchronous orbit satellite telecommunications access systems according to any one of claim 1 to 3, it is characterized in that: described magnanimity satellite router comprises local transceiver device, home server, WAP (wireless access point), and described local transceiver device, home server, WAP (wireless access point) connect respectively; Described local transceiver device comprises dual-mode antenna, modulator-demodulator, for receiving and dispatching described forward link radio signals, return link wireless signal; Described home server stores described local transceiver device and receives data.