Multi-node backup system based on satellite communication link

Abstract

The utility model relates to a multi-node backup system based on a satellite communication link, which is used for being connected with an antenna of a satellite station and realizing data transmission and reception, and comprises a modulation and demodulation device, the modulation and demodulation device is connected with an intermediate frequency combiner and an intermediate frequency splitter, the intermediate frequency combiner is connected with an uplink switching matrix, and the uplink switching matrix is connected with the satellite station. The intermediate frequency splitter is connected with the downlink switching matrix, and the uplink switching matrix and the downlink switching matrix of the intermediate frequency splitter are in communication connection with the antenna through a radio frequency link. The antenna system, the radio frequency subsystem and each important key node in the system are backed up, so that the high reliability of the satellite system is realized.

Description

Technical Field

[0001] The present invention relates to the field of satellite communication technology, in particular to a multi-node backup system based on satellite communication links. Background Art

[0002] With the rapid development of satellite communication technology and its increasingly widespread application in various fields, new requirements have been put forward for the reliability of satellite communication equipment to cope with equipment failures and system stability requirements that may be encountered during daily use and missions. Summary of the invention

[0003] The present invention proposes a multi-node backup system based on satellite communication links, which realizes high reliability of the satellite system by backing up the antenna system, radio frequency subsystem and various important key nodes in the system.

[0004] The technical solution of the present invention is as follows:

[0005] A multi-node backup system based on a satellite communication link, the system is used to connect the antenna of a satellite station to realize data reception and transmission, and is characterized in that it includes a modem device, the modem device is connected to an intermediate frequency combiner and an intermediate frequency splitter, the intermediate frequency combiner is connected to an uplink switching matrix, the intermediate frequency splitter is connected to a downlink switching matrix, and the intermediate frequency splitter, the uplink switching matrix and the downlink switching matrix are connected to the antenna via a radio frequency link communication.

[0006] As a further optimization of this solution, the front end of the system includes 01, 02 and 03 satellites, and the 01, 02 and 03 satellites are connected to the corresponding antennas through the same link structure. The signal of the 01 satellite is connected to two intermediate frequency combiners through the first modem device, and the intermediate frequency combiners are 1:1 hot backup. The signal of the 01 satellite is connected to two intermediate frequency splitters through the first modem device, and the intermediate frequency splitters are 1:1 hot backup.

[0007] As a further optimization of the present solution, in the radio frequency link corresponding to satellite 01, an uplink switching matrix is ​​connected to a first splitter and a second splitter, the outputs of the first splitter and the second splitter are connected to a sending board of a first optical terminal, the sending board of the first optical terminal is communicatively connected to a receiving board of the second optical terminal, the receiving board of the second optical terminal is connected to a first switching switch and a second switching switch, the first switching switch and the second switching switch are connected to a traveling wave tube amplifier via an up-converter, and the output of the traveling wave tube amplifier is connected to an antenna via a feed network.

[0008] As a further optimization of this solution, the first switching switch and the second switching switch are respectively connected to an up-converter with a 1:1 hot backup, and the traveling wave tube amplifiers connected to the two up-converters are 2:1 hot backup.

[0009] As a further optimization of this solution, in the radio frequency link corresponding to the 01 satellite, the downlink switching matrix is ​​connected to a third switching switch and a fourth switching switch, the third switching switch and the fourth switching switch are connected to the receiving board of the first optical terminal, the sending board of the first optical terminal is communicatively connected to the sending board of the second optical terminal, the sending board of the second optical terminal is connected to a third splitter and a fourth splitter, the third splitter and the fourth splitter are connected to a low noise amplifier via a down converter and a splitter, and the output of the low noise amplifier is connected to the antenna via a feed network.

[0010] As a further optimization of this solution, the third splitter and the fourth splitter are respectively connected to 1:1 hot backup down converters, and each group of down converters is connected to a 1:1 hot backup low noise amplifier via a fifth splitter and a sixth splitter.

[0011] As a further optimization of this solution, the first optical terminal is located in a core machine room, and the second optical terminal is located in a radio frequency machine room.

[0012] As a further optimization of this solution, the antenna is a hot backup 3:1.

[0013] The working principle and beneficial effects of the present invention are:

[0014] The satellite station data is encoded and modulated by the satellite modem equipment to output L-band signals, which are then converted to C-band signals by the up-converter and amplified by the high-power amplifier. The signals are then sent out by the satellite antenna and transmitted to the user end through the satellite relay. The user end data is transmitted to the satellite station after being relayed by the satellite, amplified by the low-noise amplifier, and converted to L-band signals by the down-converter, which are then transmitted to the satellite modem equipment.

[0015] This application uses backup in every link to ensure the reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a block diagram of the connection principle of this application. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The basic block diagram of the multi-node backup system based on satellite communication links is as follows: Figure 1 As shown in the figure, the satellite station data is encoded and modulated by the satellite modem equipment to output L-band signals, which are then converted to C-band signals by the up-converter and amplified by the high-power amplifier. The signals are then sent out by the satellite antenna and transmitted to the user end through the satellite relay. The user end data is transmitted to the satellite station after being relayed by the satellite, amplified by the low-noise amplifier, and converted to L-band signals by the down-converter, which are then transmitted to the satellite modem equipment.

[0020] Its main working principle is: the modem equipment from satellites 01, 02, and 03 outputs L-band signals, and multiple L-band signals are combined into one signal through a 1:1 hot backup intermediate frequency combiner and enter the uplink switching matrix. The signal output by the uplink switching matrix is ​​divided into two signals through a splitter and enters the sending board of the optical terminal to be transmitted to the RF room. The two uplink signals pass through the receiving board of the optical terminal in the RF room, and one signal is selected by the switching switch to be transmitted to the 1:1 hot backup up-conversion system to be converted into a C-band signal. The C-band signal enters the 2:1 hot backup high power amplifier for signal amplification. The amplified signal is transmitted to the antenna through the waveguide, and the antenna sends the signal to the satellite for forwarding.

[0021] The antenna receives the user-side C-band signal forwarded by the satellite, and amplifies the signal through a 1:1 hot backup low noise amplifier and transmits it to a 1:1 hot backup down converter, which converts the signal to the L-band. The signal output by the down converter is divided into two signals through a splitter and enters the sending board of the optical terminal in the RF room and is transmitted to the core room. The two downlink signals pass through the receiving board of the optical terminal in the core room, and the switch selects one signal to be transmitted to the downlink switching matrix. The downlink switching matrix transmits the signal to the 1:1 intermediate frequency splitter of the corresponding satellite after switching. The intermediate frequency splitter divides the signal into 32 intermediate frequency signals and gives them to the modulation and demodulation equipment for decoding and demodulation.

[0022] The advantages of the utility model are:

[0023] This system has a total of 4 antennas and RF subsystems, using a 3:1 mode, with 3 sets in use and 1 set as backup. This usage mode allows 3 sets of modem equipment to be used in any 3 RF links, and can quickly switch to the backup link when one of the RF links fails. During routine inspections and maintenance, services can also be transferred to the backup link, so that services can be maintained without interruption.

[0024] In this system, the intermediate frequency splitter and combiner, optical terminal receiving and transmitting boards, upconverter, downconverter, low noise amplifier and power amplifier all adopt hot backup, which can realize automatic switching when the equipment fails, without affecting the use of the system and causing business interruption. At the same time, the above equipment all have remote monitoring protocols, and when a failure occurs, the fault can be checked and repaired according to the alarm information of the station control software. Since each equipment node has a backup, the business will not be interrupted during the troubleshooting and repair process.

[0025] Most of the backup devices at each node in this system adopt modular design and support hot-swap. When troubleshooting and repairing faults, only the module needs to be replaced, which greatly shortens the maintenance time.

[0026] In this system, the backup devices of each node adopt a universal design between the same type of devices, and the modules can be interchanged. For example, if the active RF link 1 device fails, the corresponding module of the backup RF link 4 can be replaced with the RF link 1 to clear the fault, which can also shorten the maintenance time of the system.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-node backup system based on a satellite communication link, which is used to connect the antennas of satellite stations to realize data transmission and reception, and is characterized in that: The invention comprises a modem device, wherein the modem device is connected with an intermediate frequency combiner and an intermediate frequency splitter, wherein the intermediate frequency combiner is connected with an uplink switching matrix, and the intermediate frequency splitter is connected with a downlink switching matrix, and the uplink switching matrix and the downlink switching matrix of the intermediate frequency splitter are connected with the antenna via a radio frequency link communication.

2. The multi-node backup system based on satellite communication links according to claim 1 is characterized in that: The front end of the system includes 01, 02 and 03 satellites, which are connected to corresponding antennas through the same link structure. The signal of the 01 satellite is connected to two intermediate frequency combiners through the first modem device, and the intermediate frequency combiners are 1:1 hot backup. The signal of the 01 satellite is connected to two intermediate frequency splitters through the first modem device, and the intermediate frequency splitters are 1:1 hot backup.

3. The multi-node backup system based on satellite communication links according to claim 2 is characterized in that: In the radio frequency link corresponding to satellite 01, the uplink switching matrix is ​​connected to a first splitter and a second splitter, the outputs of the first splitter and the second splitter are connected to a sending board of a first optical terminal, the sending board of the first optical terminal is communicatively connected to a receiving board of the second optical terminal, the receiving board of the second optical terminal is connected to a first switching switch and a second switching switch, the first switching switch and the second switching switch are connected to a traveling wave tube amplifier via an up-converter, and the output of the traveling wave tube amplifier is connected to an antenna via a feed network.

4. The multi-node backup system based on satellite communication links according to claim 3 is characterized in that: The first switch and the second switch are respectively connected to an up-converter with a 1:1 hot backup, and the traveling wave tube amplifiers connected to the two up-converters are 2:1 hot backup.

5. The multi-node backup system based on satellite communication links according to claim 2 is characterized in that: In the radio frequency link corresponding to satellite 01, the downlink switching matrix is ​​connected with a third switching switch and a fourth switching switch, the third switching switch and the fourth switching switch are connected with a receiving board of the first optical terminal, the sending board of the first optical terminal is communicatively connected with a sending board of the second optical terminal, the sending board of the second optical terminal is connected with a third splitter and a fourth splitter, the third splitter and the fourth splitter are connected with a low noise amplifier via a down converter and a splitter, and the output of the low noise amplifier is connected to an antenna via a feed network.

6. The multi-node backup system based on satellite communication links according to claim 5, characterized in that: The third splitter and the fourth splitter are respectively connected to the 1:1 hot standby down converters, and each group of down converters is connected to the 1:1 hot standby low noise amplifier via the fifth splitter and the sixth splitter.

7. The multi-node backup system based on satellite communication links according to any one of claims 3 to 6, characterized in that: The first optical terminal is located in a core machine room, and the second optical terminal is located in a radio frequency machine room.

8. The multi-node backup system based on satellite communication links according to claim 5, characterized in that: The antenna is hot-backup 3:1.

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