A low-orbit satellite working mode fast switching device based on satellite-to-ground multi-beam

Abstract

The present invention discloses a low-orbit satellite working mode fast switching device based on satellite-ground multi-beam, which belongs to the field of low-orbit satellite systems. It can generate software loading, traffic switching, phased array antenna port switching and other instructions according to mission planning, autonomous operation model, operation status, etc. to complete the fast mode switching, complete the feeding and business working mode switching without affecting the existing service users, realize the seamless switching of satellites between ground stations, and support users of different systems to be online at the same time. This configuration is suitable for various types of multifunctional integrated satellite platforms, with simple equipment configuration and low complexity of payload equipment connection, which can meet different application requirements and is suitable for large-scale satellite autonomous operation.

Description

Technical Field

[0001] The invention relates to a low-orbit satellite working mode fast switching device based on satellite-to-ground multi-beam, belonging to the field of low-orbit satellite communication systems. Background Art

[0002] In recent years, with the rapid increase in low-orbit satellite Internet application service scenarios, in order to adapt to the needs of more levels of users and fully utilize the on-orbit payload equipment, how to quickly complete the switching between feed mode and business mode and the rapid switching of different system business modes is one of the current research hotspots in the field of low-orbit satellite communications. At present, the feed link and user link of low-orbit satellites are independent payload equipment, and the feed link is mostly in a shutdown state after leaving the satellite, and the payload resource utilization rate is low; at the same time, in order to make full use of the satellite transit time, the satellite needs to be equipped with two sets of independent feed link payload equipment to complete the seamless switching of the satellite at the signal gateway, and the satellite-to-ground efficiency is low. In addition, user payloads usually configure multiple types of payloads or load different applications in time to realize multi-system user function services. Summary of the invention

[0003] The purpose of the present invention is to avoid the shortcomings of the above-mentioned background technology and propose a low-orbit satellite working mode rapid switching device based on satellite-to-ground multi-beam. The present invention configures a comprehensive processing payload and a phased array antenna, combined with a satellite autonomous operation system, without affecting the existing service capabilities. It can further improve the payload utilization and expand the service scenarios.

[0004] A low-orbit satellite working mode fast switching device based on satellite-to-ground multi-beam realizes a multi-beam satellite-to-ground link through the configured integrated processing payload and phased array antenna; the working mode switching is completed in combination with the switching of the phased array antenna port;

[0005] The switching between the feeding mode and the service mode is as follows:

[0006] When the gateway is visible according to the mission plan or the satellite autonomous operation model, the integrated processing payload selects a low-traffic beam based on traffic monitoring, and then switches the beam service to other beams within the satellite or the neighboring satellite beam. After the adjustment is completed, the feed / service mode switching is started;

[0007] The switching of different business models is as follows:

[0008] When supporting two user services at the same time according to the mission plan, the group of random beams in the comprehensive processing payload continues to provide services, and the other beam group performs preparations for traffic adjustment; during adjustment, if it is the feed link mode, the feed traffic is first switched to the neighboring satellite, and then the service beam traffic is switched to other beams in the satellite or the neighboring satellite beam for transmission; after the adjustment is completed, the software version of the beam group to be switched is reloaded and the phased array antenna port is switched, thereby completing the switching of different business system modes.

[0009] Furthermore, the comprehensive processing payload is used to complete 8-way signal modulation and demodulation, user network access, route detection and update, and multi-source information exchange functions; the comprehensive processing payload generates phased array antenna port switching or software version loading instructions based on the received real-time mission instructions, stored mission models, or attitude and orbit information broadcast by the received satellite; at the same time, the satellite's comprehensive processing payload completes the route update indication reporting based on the link establishment and link detection conditions, and completes data analysis according to the latest route.

[0010] Furthermore, the comprehensive processing load includes a routing switching unit, a load monitoring unit, a program storage unit and two processing boards; wherein the program storage unit switches the business mode to the feeding mode by sending different program loading instructions;

[0011] The switching process between business mode and feeding mode is as follows:

[0012] Step 101, the comprehensive processing load performs traffic monitoring through the routing switching module and selects the service beam with the lowest traffic;

[0013] Step 102: The load monitoring unit of the integrated processing load initiates a beam flow adjustment instruction to adjust the service flow of the beam to be switched to other beams within the satellite or to a neighboring satellite;

[0014] Step 103, the load monitoring unit of the integrated processing load initiates a beam mode switching instruction to switch the working state parameters of the beam processing resources corresponding to the processing board from the service mode to the feeding mode;

[0015] Step 104: After the mode switching is completed, the feed information transmission beam is synchronized and link detected with the gateway to be entered, and route re-convergence and upstream diffusion are performed;

[0016] Step 105, the routing exchange unit for comprehensive processing load connects to the new routing table and completes the service information forwarding, and the connection between the satellite and the new gateway is established;

[0017] Step 106, after the new feeder link is completed, the load monitoring unit of the integrated processing load initiates a beam mode switching instruction, switches the corresponding beam processing resource working state parameter to the service mode, and provides service transmission service after interacting with the random beam;

[0018] Furthermore, the phased array receiving antenna is provided with two groups, namely phased array receiving antenna I and phased array receiving antenna II, which are used to complete four-way wireless signal reception, low-noise amplification and signal frequency conversion; the beam control interfaces of the two phased array receiving antennas are divided into a main port and a backup port, and the port selection is completed by receiving the instruction sent by the comprehensive processing load, the main port receives the wave position control information of the beam group A and the angle information of the comprehensive processing load processing board a, and the backup port receives the wave position control information of the beam group B and the angle information of the comprehensive processing load processing board b; the random beam processing resources in the processing board a and the processing board b can generate the same-system service beam wave position control information; the transmitting antenna is similar to the receiving antenna; the comprehensive processing load and the phased array antenna support 8-beam information transmission and reception; the two processing boards of the comprehensive processing load can independently load the program, each realizing four-beam information processing, and the 8 beams can support feeding mode and business mode.

[0019] Furthermore, there are 8 beams between the satellite and the ground, which are divided into two groups, beam a to beam d are beam group A, and beam e to beam h are beam group B;

[0020] When the satellite initially passes by, beam a is used for feeding information transmission, beam b is used for random beam access, and beams c to h are used for service information transmission; the processing resources of the random beam, i.e. beam b, complete the pointing information calculation of service beams c to h;

[0021] When the satellite switches at the domestic gateway, that is, when the satellite is about to leave the original gateway and enter the new gateway, beam a continues to serve as the feeder link; beam b continues to be accessed as a random beam and completes all beam angle calculations; the beam with the lowest traffic is selected from beams c to h to switch the working mode;

[0022] The satellite adds different system modes within the country, that is, two beam groups support different user service needs respectively;

[0023] When the satellite supports both system specifications, each beam group can operate its own model to complete its own intra-group feeding or service mode switching.

[0024] Furthermore,

[0025] The user working mode switching process is as follows:

[0026] Step 201: When the low-orbit satellite enters a key area according to mission planning or an autonomous operation model, the group where the beam is located continues to provide services, and another beam group initiates switching preparation;

[0027] Step 202: If the beam group to be switched is in feed mode, firstly, feed link traffic is directed to the neighboring satellite; beam traffic data in the service mode is directed to the reserved group or other satellites through intra-satellite beam switching or inter-satellite switching;

[0028] Step 203, after the flow adjustment is completed, the load monitoring unit of the comprehensive processing load generates a software version reloading instruction and a phased array antenna port switching instruction, controls the processing board to be switched to load the software, and switches the phased array to the processing board to be switched;

[0029] Step 204: The two wave arrays can support different system modes, and the service mode switching is completed.

[0030] Furthermore, the routing switching unit that comprehensively processes the load has the function of monitoring and counting the traffic of each beam, as well as the function of monitoring and reporting the routing status; at the same time, it supports updating the routing table on the ground.

[0031] Furthermore, the monitoring unit of the integrated processing load has the ability to initiate traffic adjustment and sense the completion status, and supports initiating switching of the terminal being served to other beams of the satellite or to a neighboring satellite without interrupting the service.

[0032] Furthermore, the program storage unit for the integrated processing load is an erasable FLASH, which supports the storage of different programs; the business mode is switched to the feeding mode by sending different program loading instructions, and the switching process is to read different FLASH.

[0033] Compared with the prior art, the advantages of the present invention are:

[0034] The present invention adopts satellite-to-ground phased array multi-beam link payload equipment, and each beam can support the realization of feeding or business mode, and can also support multiple types of users by beam division, thereby reducing the configuration of separate feeding link payloads, reducing payload costs and satellite platform resource requirements; and each beam can back up each other, thereby ensuring the reliability of the satellite-to-ground link.

[0035] The present invention can complete real-time instruction generation according to mission planning and the real-time working status of the satellite, including phased array port switching, flow adjustment, mode switching, etc. It is suitable for large-scale low-orbit satellites to operate autonomously in orbit and reduce ground operation and control pressure.

[0036] The phased array antenna of the present invention is equipped with two wave control ports, which can be used as a primary and a backup, and can also receive the scheduling information of different processing resource modules through fast port switching to achieve business service mode switching.

[0037] The present invention modularizes the comprehensive processing load processing resources, so that the processing board can independently read the program storage unit to load the software, and the processing boards are not coupled; the same system beam pointing information is realized by the processing board where the random beam is located.

[0038] The present invention supports the switching of satellites between gateways, avoids the usage constraints of temporary loss of connection with ground gateways caused by the rapid movement of low-orbit satellites, increases the communication time with the ground, and improves satellite-to-ground efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a diagram showing the implementation principle of an embodiment of the present invention.

[0040] Figure 2 Schematic diagram of an application of an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings and examples.

[0042] This embodiment supports the switching of the feeding mode and the service mode, that is, when the satellite determines that the gateway is visible according to the mission planning or the autonomous operation model, the integrated processing payload selects the low-traffic beam according to the traffic monitoring, and then switches the service information of the beam to other beams in the satellite or the neighboring satellite beam. After the adjustment is completed, the switching of the feeding and service modes is started. The invention also supports the switching of service modes of different systems. When the satellite needs to increase the type of user service, the group where the random beam is located in the integrated processing payload continues to provide services, and the other beam group prepares for the traffic adjustment; during the adjustment, if the beam group includes the feeding link mode, the feeding traffic is switched to the neighboring satellite; then the original service beam information is switched to other beams in the satellite or the neighboring satellite beam for transmission; after the adjustment is completed, the beam group reloads the software version, and the phased array port is switched, thus completing the switching of different service system modes.

[0043] A switching scenario of a low-orbit satellite working mode fast switching device based on satellite-to-ground multi-beam is as follows, setting the satellite-to-ground 8 beams (beams a~d are group 1, beams e~h are group 2):

[0044] When the satellite initially passes by, beam a is used for feeding information transmission, beam b is used for random beam access, and beams c to h are used for service information transmission; the processing resources of the random beam, i.e. beam b, complete the pointing information calculation of service beams c to h.

[0045] When the satellite switches at the domestic gateway, that is, when the satellite is about to leave the original gateway and enter the new gateway, beam a continues to serve as the feeder link; beam b continues to be accessed as a random beam and completes all beam angle calculations; the beam with the lowest traffic is selected from beams c to h to switch the working mode; the switching process is as follows:

[0046] The comprehensive processing load monitors traffic through the routing and switching modules and selects the service beam with the lowest traffic;

[0047] The load monitoring unit of the integrated processing load initiates a beam flow adjustment instruction to adjust the service flow of the beam to be switched to other beams within the satellite or the beam of the neighboring satellite;

[0048] The load monitoring unit of the integrated processing load initiates a beam mode switching instruction to switch the working state parameters of the beam processing resources corresponding to the processing board from the business mode to the feeding mode;

[0049] After the mode switching is completed, the feed information transmission beam is synchronized and link detected with the gateway to be entered, and the routing is re-converged and the injection is diffused;

[0050] The integrated processing load routing exchange unit connects to the new routing table and completes the business information forwarding. The connection between the satellite and the new signal gateway is established;

[0051] After the new feed link is completed, the load monitoring unit of the integrated processing load initiates a beam mode switching command, switches the working state parameters of the beam processing resources corresponding to the original feed link to the business mode, and provides business transmission services after interacting with the random beam;

[0052] The satellite adds different system modes within the country, that is, two beam groups support different user service needs respectively;

[0053] When a low-orbit satellite enters a key area according to mission planning or autonomous operation model, the group where the beam is located continues to provide services, and another beam group initiates handover preparation;

[0054] If the beam group to be switched is in feed mode, the feed link traffic is first directed to the neighboring satellite; the beam traffic data in the business mode is transferred to the reserved group or other satellites through intra-satellite beam switching or inter-satellite switching;

[0055] After the flow adjustment is completed, the load monitoring unit of the comprehensive processing load generates a software version reloading instruction and a phased array antenna port switching instruction, controls the processing board to be switched to load the software, and switches the phased array to the board to be switched.

[0056] The two wave arrays can support different system modes, and the business mode switching is completed.

[0057] When the satellite supports both system specifications, each beam group can operate its own model to complete its own intra-group feeding or service mode switching.

[0058] Reference Figure 1 and Figure 2 In this embodiment, a low-orbit satellite working mode fast switching device based on satellite-to-ground multi-beam includes a comprehensive processing payload, a phased array receiving antenna I, a phased array receiving antenna II, a phased array transmitting antenna I, and a phased array transmitting antenna II.

[0059] The comprehensive processing payload consists of two processing boards (processing board I, processing board II), a routing switching unit, a payload monitoring unit, and a program storage unit, and mainly completes the functions of 8-way signal modulation and demodulation, user access, route detection and update, multi-source information exchange, etc. The device generates instructions such as phased array antenna port switching and software version loading according to the received real-time task instructions or stored task models and the attitude and orbit information broadcast by the received satellite; at the same time, the satellite comprehensive processing payload completes the reporting of route update instructions according to the link establishment and link detection conditions, and completes data distribution according to the latest route.

[0060] The phased array receiving antenna I and the phased array receiving antenna II have the same functions, and mainly complete tasks such as four-way wireless signal reception, low-noise amplification, and signal frequency conversion; the beam control interface of the phased array receiving antenna is divided into a main port and a backup port, and the port selection is completed by receiving instructions issued by the comprehensive processing load. The main port receives the wave position control information of beam group A, and the backup port receives the wave position control information of beam group B.

[0061] The brief working principle of the present invention is as follows:

[0062] The present invention realizes a multi-beam satellite-to-ground link by configuring a comprehensive processing payload and a phased array antenna; the fast switching of the working mode is completed by combining the switching of the phased array antenna port; and the payload utilization rate and the service scenario can be further improved without affecting the existing services. The invention supports fast switching between the feed mode and the service mode. When the signal gateway is visible according to the mission planning or the satellite autonomous operation model, the comprehensive processing payload selects a low-flow beam according to the flow monitoring, and then switches the beam service to other beams in the satellite or the neighboring satellite beam. After the adjustment is completed, the feed / service mode switching is started; the invention also supports the switching of different system service modes. When supporting two user services at the same time according to the mission planning, the group where the random beam is located in the comprehensive processing payload continues to provide services, and the other beam group performs flow adjustment preparation; during the adjustment, if the feed link mode is in progress, the feed flow is first switched to the neighboring satellite; then the service beam flow is switched to other beams in the satellite or the neighboring satellite beam for transmission; after the adjustment is completed, the beam group to be switched reloads the software version and the phased array port is switched, so as to complete the switching of different service system modes.

Claims

1. A low-orbit satellite working mode fast switching device based on satellite-to-ground multi-beam, which realizes a multi-beam satellite-to-ground link through a configured integrated processing payload and a phased array antenna; the switching of the working mode is completed in combination with the switching of the phased array antenna port; the integrated processing payload includes a routing switching unit, a payload monitoring unit, a program storage unit and two processing boards; wherein, The program storage unit realizes the switching between the business mode and the feeding mode by sending different program loading instructions; it is characterized in that: The switching process between business mode and feeding mode is as follows: Step 101, the comprehensive processing load performs traffic monitoring through the routing switching module and selects the service beam with the lowest traffic; Step 102: The load monitoring unit of the integrated processing load initiates a beam flow adjustment instruction to adjust the service flow of the beam to be switched to other beams within the satellite or to a neighboring satellite; Step 103, the load monitoring unit of the integrated processing load initiates a beam mode switching instruction, and the processing board corresponding to the beam processing resource loading version program or working status parameter switches from the business mode to the feeding mode, and transmits the feeding information; Step 104: After the mode switching is completed, the feed information transmission beam is synchronized and link detected with the gateway to be entered, and route re-convergence and upstream diffusion are performed; Step 105, the routing exchange unit for comprehensive processing load receives the new routing table and completes the service information forwarding, and the connection between the satellite and the new gateway is established; Step 106, after the new feed link is completed, the load monitoring unit of the integrated processing load initiates a beam mode switching instruction, switches the working state parameters of the beam processing resources corresponding to the original feed link to the service mode, and provides service transmission services after interacting with the random beam; The switching of different business models is as follows: When supporting two user services at the same time according to the mission plan, the group where the random beam in the comprehensive processing payload is located continues to provide services, and the other beam group performs preparations for traffic adjustment; during adjustment, if the beam group has a feeder link mode, the feed traffic is first switched to the neighboring satellite, and then the service beam traffic is switched to other beams in the satellite or the neighboring satellite beam for transmission; after the adjustment is completed, the software version of the beam group to be switched is reloaded and the phased array antenna port is switched, thereby completing the switching of different business system modes.

2. According to claim 1, a low-orbit satellite working mode fast switching device based on satellite-to-ground multi-beam is characterized in that: The comprehensive processing load is used to complete 8-way signal modulation and demodulation, user network access, route detection and update, and multi-source information exchange functions; The comprehensive processing payload generates phased array antenna port switching, working parameter adjustment or software version loading instructions based on the received real-time mission instructions, stored mission models or attitude and orbit information and satellite position information broadcast by the received satellite. At the same time, the satellite's comprehensive processing payload completes the routing update indication reporting according to the link establishment and link detection conditions, and completes data analysis according to the latest route.

3. The device for quickly switching the working mode of a low-orbit satellite based on satellite-to-ground multi-beam according to claim 1 is characterized in that: There are two groups of phased array receiving antennas, namely phased array receiving antenna I and phased array receiving antenna II, which are used to complete four-way wireless signal reception, low-noise amplification and signal frequency conversion. The beam control interfaces of the two phased array receiving antennas are divided into main ports and backup ports. The port selection is completed by receiving the instructions sent by the integrated processing payload. The main port receives the wave position control information of beam group A and the angle information of integrated processing payload processing board a, and the backup port receives the wave position control information of beam group B and the angle information of integrated processing payload processing board b. The random beam processing resources of processing board a and processing board b can generate the wave position control information of the same-system business beam. The integrated processing payload and phased array antenna support 8-beam information transmission and reception. The two processing boards of the integrated processing payload can load programs independently, each realizing four-beam information processing, and the 8 beams can support feeding mode and business mode.

4. The device for quickly switching the working mode of a low-orbit satellite based on satellite-to-ground multi-beam according to claim 3 is characterized in that: There are 8 beams between the satellite and the ground, divided into two groups. Beams a to d are beam group A, and beams e to h are beam group B. When the satellite initially passes by, beam a is used for feeding information transmission, beam b is used for random beam access, and beams c to h are used for service information transmission; the processing resources of the random beam, i.e. beam b, complete the pointing information calculation of service beams c to h; When the satellite switches at the domestic gateway, that is, when the satellite is about to leave the original gateway and enter the new gateway, beam a continues to serve as the feeder link; beam b continues to be accessed as a random beam and completes all beam angle calculations; the beam with the lowest traffic is selected from beams c to h to switch the working mode; The satellite adds different system modes within the country, that is, two beam groups support different user service needs respectively; When the satellite supports both system specifications, each beam group can run its own mission planning to complete its own intra-group feeding or business mode switching.

5. The device for quickly switching the working mode of a low-orbit satellite based on satellite-to-ground multi-beam according to claim 4 is characterized in that: The user working mode switching process is as follows: Step 201: When the low-orbit satellite enters a key area according to mission planning or an autonomous operation model, the group where the beam is located continues to provide services, and another beam group initiates switching preparation; Step 202: If there is a feed mode in the beam group to be switched, the feed link traffic is first directed to the neighboring satellite; the beam traffic data of the service mode is transferred to the reserved group or other satellites through intra-satellite beam switching or inter-satellite switching; Step 203, after the flow adjustment is completed, the load monitoring unit of the comprehensive processing load generates a software version reloading instruction and a phased array antenna port switching instruction, controls the processing board to be switched to load the software, and switches the phased array port to the processing board to be switched; Step 204: The two beam groups can support different system modes, and the service mode switching is completed.

6. The device for quickly switching the working mode of a low-orbit satellite based on satellite-to-ground multi-beam according to claim 1 is characterized in that: The routing switching unit that comprehensively processes the load has the functions of monitoring and counting the traffic of each beam, as well as monitoring and reporting the routing status; at the same time, it supports updating the routing table on the ground.

7. The device for quickly switching the working mode of a low-orbit satellite based on satellite-to-ground multi-beam according to claim 1 is characterized in that: The monitoring unit of the integrated processing load is used to initiate traffic adjustment and sense the completion status. It can switch the terminal being served to other beams of the satellite or neighboring satellites, and the service business will not be interrupted during the switching process.

8. The device for quickly switching the working mode of a low-orbit satellite based on satellite-to-ground multi-beam according to claim 1 is characterized in that: The program storage unit for the comprehensive processing load is an erasable FLASH, which supports the storage of different programs; the business mode is switched to the feeding mode by sending different program loading instructions, and the switching process is to read different FLASH.

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