CN113131993A - Airborne satellite communication system and satellite link switching method thereof - Google Patents
Airborne satellite communication system and satellite link switching method thereof Download PDFInfo
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- CN113131993A CN113131993A CN202110411218.6A CN202110411218A CN113131993A CN 113131993 A CN113131993 A CN 113131993A CN 202110411218 A CN202110411218 A CN 202110411218A CN 113131993 A CN113131993 A CN 113131993A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
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- H04B7/1851—Systems using a satellite or space-based relay
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- H—ELECTRICITY
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- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
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Abstract
The application discloses an airborne satellite communication system and a satellite link switching method thereof, wherein a modem of the airborne satellite communication system comprises a plurality of core protocol board cards, a beam configuration information interaction module and a switching connection module for connecting the currently used core protocol board cards to an antenna; the method comprises the following steps: starting up a target core protocol board card; based on the current core protocol board card in use, sending the access time and the current position information of the target core protocol board card to a network operation center of the current core protocol board card; based on feedback information of a network operation center of a current core protocol board card, obtaining beam configuration information of a target core protocol board card, and writing the beam configuration information into a beam configuration information interaction module; switching and connecting a target core protocol board card to an antenna; and the target core protocol board card establishes a communication channel and tracks the satellite according to the read beam configuration information. The method and the device shorten the interruption time of satellite communication in the satellite link switching process.
Description
Technical Field
The application relates to the technical field of satellite communication, in particular to an airborne satellite communication system and a satellite link switching method thereof.
Background
In recent years, as the use requirements of unit communication, onboard entertainment equipment and the like of airborne satellite communication systems carried on airplanes, spacecrafts and the like are continuously improved, multi-board card structures are derived from the traditional single communication board card structures of the modems of the airborne satellite communication systems so as to adapt to switching among multi-band and high-low orbit satellite systems. However, in the related art, when the switchboard card is used, the efficiency is often low, so that the interruption time of satellite communication is long.
In view of the above, it is an important need for those skilled in the art to provide a solution to the above technical problems.
Disclosure of Invention
The invention aims to provide an airborne satellite communication system and a satellite link switching method thereof, so as to effectively shorten communication interruption time during satellite link switching.
In order to solve the technical problem, on one hand, the application discloses a satellite link switching method of an airborne satellite communication system, wherein a modem of the airborne satellite communication system comprises at least two core protocol board cards adopting different communication protocols, a beam configuration information interaction module and a switching connection module for connecting the currently used core protocol board card to an antenna; the method comprises the following steps:
starting up a target core protocol board card which is determined to be switched for use;
based on the current core protocol board card in use, sending the access time and the current position information of the target core protocol board card to a network operation center of the current core protocol board card;
acquiring beam configuration information of the target core protocol board card based on feedback information of a network operation center of the current core protocol board card so as to write the beam configuration information into the beam configuration information interaction module;
switching and connecting the target core protocol board card to an antenna based on the switching and connecting module;
and the target core protocol board card establishes a communication channel and tracks the satellite according to the beam configuration information read from the beam configuration information interaction module.
Optionally, the obtaining the beam configuration information of the target core protocol board based on the feedback information of the network operation center of the current core protocol board includes:
acquiring downlink carrier frequency, uplink access power difference value and uplink capture time slot information of the target core protocol board fed back by a network operation center of the current core protocol board;
calculating the uplink access power of the target core protocol board card based on the uplink access power difference value;
and taking the downlink carrier frequency, the uplink access power and the uplink capture time slot information as the beam configuration information of the target core protocol board card.
Optionally, the calculating the uplink access power of the target core protocol board based on the uplink access power difference value includes:
based on Eup＝EIPR/BWb+ DIFF calculates the uplink access power of the target core protocol board card;
wherein E isupThe uplink access power is obtained; the EIPR is the read current omnidirectional radiation power of the antenna of the current core protocol board card; BW (Bandwidth)bThe working bandwidth of the current core protocol board card is obtained; the DIFF is a difference value of uplink access power between the target core protocol board and the current core protocol board.
Optionally, the obtaining of the downlink carrier frequency, the uplink access power difference value, and the uplink capture time slot information of the target core protocol board, which are fed back by the network operation center of the current core protocol board, includes:
the network operation center of the current core protocol board transmits the access time and the current position information to the network operation center of the target core protocol board;
the network operation center of the target core protocol board card distributes downlink carrier frequency, uplink access power difference value and uplink capture time slot information to the target core protocol board card according to the access time, and feeds the downlink carrier frequency, the uplink access power difference value and the uplink capture time slot information back to the network operation center of the current core protocol board card;
and acquiring the downlink carrier frequency, the uplink access power difference value and the uplink capture time slot information through the network operation center of the current core protocol board card.
Optionally, the allocating a downlink carrier frequency and an uplink access power difference value to the target core protocol board includes:
determining the downlink carrier frequency according to the beam pattern and the load flow of the airborne satellite communication system at the current position;
according to DIFF ═ SNRa/BWa-SNRb/BWb-(G/Ta-G/Tb) Calculating the difference value of the uplink access power;
wherein, DIFF is the difference value of the uplink access power; SNRaThe signal-to-noise ratio of the target core protocol board card; BW (Bandwidth)aThe working bandwidth of the target core protocol board card is obtained; G/TaThe performance index of the receiver of the satellite transponder corresponding to the target core protocol board card is obtained; SNRbThe signal-to-noise ratio of the current core protocol board card; BW (Bandwidth)bThe working bandwidth of the current core protocol board card is obtained; G/TbAnd the performance index of the receiver of the satellite transponder corresponding to the current core protocol board card is obtained.
Optionally, the establishing, by the target core protocol board, a communication channel and tracking a satellite according to the beam configuration information read from the beam configuration information interaction module includes:
establishing a communication connection relation with an antenna by the target core protocol board card by adopting an OpenAMIP interface protocol;
and establishing a communication channel aiming at a target satellite based on an antenna and tracking the satellite according to the beam configuration information read from the beam configuration information interaction module.
Optionally, the sending the access time and the current position information of the target core protocol board to the network operation center of the current core protocol board includes:
according to Tw＝T0+TjCalculating the access time of the target core protocol board card;
wherein, TwThe access time of the target core protocol board card is obtained; t is0Is the current time; t isjEstablishing and beam pointing tracking time for an OpenAMIP protocol;
acquiring current position information of the airborne satellite communication system from an airborne inertial reference system;
and sending the access time and the current position information to a network operation center of the current core protocol board card.
In yet another aspect, the present application discloses an airborne satellite communication system, which includes a modem, an antenna connected to the modem through an intermediate frequency system;
the modem comprises at least two core protocol board cards adopting different communication protocols, a beam configuration information interaction module, a switching connection module and a control module, wherein the switching connection module is used for connecting the currently used core protocol board card to an antenna;
the control module is used for starting up a target core protocol board card which is determined to be switched for use; calling a current core protocol board card in use, sending the access time and the current position information of the target core protocol board card to a network operation center of the current core protocol board card, acquiring beam configuration information of the target core protocol board card based on feedback information of the network operation center of the current core protocol board card, and writing the beam configuration information into the beam configuration information interaction module; and controlling the switching connection module to switch and connect the target core protocol board card to an antenna so as to call the target core protocol board card, and establishing a communication channel and tracking a satellite according to the beam configuration information read from the beam configuration information interaction module.
Optionally, all the currently unused core protocol boards are in a shutdown state or a low power consumption state.
Optionally, the core protocol board currently being used and the antenna are in communication connection by using an OpenAMIP interface protocol.
The airborne satellite communication system and the satellite link switching method thereof have the advantages that: according to the method and the device, the current core protocol board card which is being used is used as the target core protocol board card, the beam configuration information is acquired in advance before the target core protocol board card is switched, the time for the target core protocol board card to perform the operation is saved, the satellite communication interruption time in the satellite link switching process is shortened, and the continuity and the stability of satellite communication signals are effectively improved.
Drawings
In order to more clearly illustrate the technical solutions in the prior art and the embodiments of the present application, the drawings that are needed to be used in the description of the prior art and the embodiments of the present application will be briefly described below. Of course, the following description of the drawings related to the embodiments of the present application is only a part of the embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the provided drawings without any creative effort, and the obtained other drawings also belong to the protection scope of the present application.
Fig. 1 is a flowchart of a satellite link switching method of an airborne satellite communication system according to an embodiment of the present application;
fig. 2 is a block diagram of an onboard satellite communication system according to an embodiment of the present disclosure.
Detailed Description
The core of the application is to provide an airborne satellite communication system and a satellite link switching method thereof so as to effectively shorten communication interruption time during satellite link switching.
In order to more clearly and completely describe the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, an embodiment of the present application discloses a satellite link switching method for an airborne satellite communication system, where a modem of the airborne satellite communication system includes at least two core protocol boards that use different communication protocols, a beam configuration information interaction module, and a switching connection module that is used to connect a currently used core protocol board to an antenna; the method comprises the following steps:
s101: and starting the target core protocol board card to be switched for use.
Specifically, in the present application, the modem is provided with a plurality of core protocol boards of a satellite operator, and the core protocol boards can communicate based on respective corresponding satellites. As a specific embodiment, the core protocol boards may be used for high-orbit satellite communication and low-orbit satellite communication, or may utilize an L-band, an S-band, a Ka-band, and a Ku-band, respectively, for satellite communication.
Each core protocol board corresponds to a corresponding satellite operator and a Network Operation Center (NOC). The network operation center is a centralized mechanism for placing network switching equipment, a management system and storage equipment, is also a monitoring center, has hardware and software assembly, and is managed by a special support engineer.
It will be readily appreciated that the onboard satellite communication system of the present application has other basic circuit configurations in addition to the modem described above to accomplish its satellite communication functions. In particular, an antenna connected to the modem via an intermediate frequency system is also included. As a specific example, the antenna may be embodied as a phased array antenna, and the antenna may be shared by core protocol boards of respective satellite operators.
The modem is provided with a switching connection module which can be used for establishing a communication connection relation with the antenna for a specified core protocol board card. Therefore, for the core protocol board currently being used, that is, the current core protocol board, it is in communication connection with the antenna through the switching connection module, performs data transmission with the ground station of the corresponding satellite operator, and receives management of the network operation center of the satellite operator.
When another core protocol board needs to be switched for use, the core protocol board to be switched for use is called a target core protocol board. Before switching, the target core protocol board needs to be started up first.
S102: and based on the current core protocol board card in use, sending the access time and the current position information of the target core protocol board card to a network operation center of the current core protocol board card.
Specifically, the target core protocol board will complete switching and network access communication at a future time, that is, an access time. Before the access time comes, the satellite communication system needs to complete the basic channel configuration work. Therefore, the current core protocol board needs to send the access time and the current location information to the network operation center.
S103: and acquiring the beam configuration information of the target core protocol board card based on the feedback information of the network operation center of the current core protocol board card so as to write the beam configuration information into the beam configuration information interaction module.
The network operation center of the current core protocol board card and the network operation center of the target core protocol board card can mutually transmit data, and the beam configuration information of the target core protocol board card is determined. After the current core protocol board receives the beam configuration information of the target core protocol board, the beam configuration information is written into the beam configuration information interaction module for storage, so that the target core protocol board can perform network access configuration subsequently based on the information.
It is easy to understand that, in the process of acquiring the beam configuration information of the target core protocol board by the current core protocol board, the current core protocol board can still receive satellite data normally, so that satellite communication is not interrupted in the process.
S104: and switching and connecting the target core protocol board card to the antenna based on the switching and connecting module.
S105: and the target core protocol board card establishes a communication channel and tracks the satellite according to the beam configuration information read from the beam configuration information interaction module.
Specifically, after the switching connection module establishes the communication connection between the target core protocol board and the antenna, the target core protocol board reads the information stored in the beam configuration information interaction module to perform beam configuration, and then establishes a communication channel and tracks the satellite.
Therefore, according to the satellite link switching method of the airborne satellite communication system, the current core protocol board card which is being used is used as the target core protocol board card, the beam configuration information is acquired in advance before the switching by the target core protocol board card, the time for the target core protocol board card to perform the operation is saved, the interruption time of satellite communication in the satellite link switching process is shortened, and the continuity and the stability of satellite communication signals are effectively improved.
As a specific embodiment, the method for switching a satellite link of an airborne satellite communication system, provided by the embodiment of the present application, based on the above content and based on feedback information of a network operation center of a current core protocol board, acquires beam configuration information of a target core protocol board, and includes:
acquiring downlink carrier frequency, uplink access power difference value and uplink capture time slot information of a target core protocol board card fed back by a network operation center of a current core protocol board card;
calculating the uplink access power of the target core protocol board card based on the uplink access power difference value;
and taking the downlink carrier frequency, the uplink access power and the uplink capture time slot information as the beam configuration information of the target core protocol board card.
Specifically, the beam configuration information may specifically include downlink carrier frequency, uplink access power, and uplink acquisition timeslot information of the target core protocol board, and of course, may also include other important configuration information, such as downlink power, downlink bandwidth, and the like.
The uplink access power of the target core protocol board card is specifically calculated based on the difference value of the uplink access power of the target core protocol board card and the uplink access power of the current core protocol board card. As a specific embodiment, calculating the uplink access power of the target core protocol board based on the uplink access power difference value specifically includes:
based on Eup＝EIPR/BWb+ DIFF calculates the uplink access power of the target core protocol board card;
wherein E isupAccessing power for uplink; the EIPR is the read current omnidirectional radiation power of the antenna of the current core protocol board card; BW (Bandwidth)bThe working bandwidth of the current core protocol board card; DIFF is the target core protocol board andand the uplink access power difference value of the current core protocol board card.
As a specific embodiment, the method for switching a satellite link of an airborne satellite communication system according to the embodiment of the present application, based on the above contents, acquires downlink carrier frequency, uplink access power difference value, and uplink capture timeslot information of a target core protocol board fed back by a network operation center of a current core protocol board, and includes:
the network operation center of the current core protocol board card forwards the access time and the current position information to the network operation center of the target core protocol board card;
the network operation center of the target core protocol board card distributes downlink carrier frequency, uplink access power difference value and uplink capture time slot information to the target core protocol board card according to the access time and feeds the downlink carrier frequency, the uplink access power difference value and the uplink capture time slot information back to the network operation center of the current core protocol board card;
and acquiring downlink carrier frequency, an uplink access power difference value and uplink capture time slot information through a network operation center of the current core protocol board card.
Specifically, the beam configuration information of the target core protocol board, which is fed back by the network operation center of the current core protocol board, is specifically calculated or distributed by the network operation center of the target core protocol board.
As a specific embodiment, the method for switching a satellite link of an airborne satellite communication system, provided by the embodiment of the present application, allocates a downlink carrier frequency and an uplink access power difference value to a target core protocol board card on the basis of the foregoing contents, and includes:
determining downlink carrier frequency according to a beam pattern and load flow of the airborne satellite communication system at the current position;
according to DIFF ═ SNRa/BWa-SNRb/BWb-(G/Ta-G/Tb) Calculating an uplink access power difference value;
wherein, the DIFF is an uplink access power difference value; SNRaThe signal-to-noise ratio of the target core protocol board card is obtained; BW (Bandwidth)aThe working bandwidth of the target core protocol board card is obtained; G/TaIs a target nucleusReceiver performance indexes of satellite transponders corresponding to the core protocol board cards; SNRbThe signal-to-noise ratio of the current core protocol board card; BW (Bandwidth)bThe working bandwidth of the current core protocol board card; G/TbAnd the performance index of the receiver of the satellite transponder corresponding to the current core protocol board card.
Specifically, G/T is the ratio of the receiving antenna gain G to the receiving system noise temperature T, and is an important parameter of a satellite transponder of a communication satellite, wherein the unit is dB/k.
As a specific embodiment, the satellite link switching method of the airborne satellite communication system provided in the embodiment of the present application, based on the above contents, performs communication channel establishment and satellite tracking by the target core protocol board according to the beam configuration information read from the beam configuration information interaction module, and includes:
establishing a communication connection relation with an antenna by a target core protocol board card by adopting an OpenAMIP interface protocol;
and establishing a communication channel aiming at the target satellite based on the antenna and tracking the satellite according to the beam configuration information read from the beam configuration information interaction module.
Specifically, an OpenAMIP interface protocol may be specifically adopted between each core protocol board and the antenna. In addition, in a specific embodiment, after the target core protocol board completes the switching connection, the state of the antenna may be adjusted through the OpenAMIP interface protocol, so that the antenna is adjusted to a state in which the satellite link corresponding to the target core protocol board is used for communication.
In another embodiment, the state of the antenna may also be adjusted in advance by the current core protocol board before the board is switched, so as to further shorten the interruption time of the satellite communication.
As a specific embodiment, the method for switching a satellite link of an airborne satellite communication system according to the embodiment of the present application, based on the above contents, sends access time and current location information of a target core protocol board to a network operation center of a current core protocol board, and includes:
according to Tw＝T0+TjComputing a target coreThe access time of the core protocol board card;
wherein, TwThe access time of the target core protocol board card is obtained; t is0Is the current time; t isjEstablishing and beam pointing tracking time for an OpenAMIP protocol;
acquiring current position information of the airborne satellite communication system from the airborne inertial reference system;
and sending the access time and the current position information to a network operation center of the current core protocol board card.
Referring to fig. 2, an embodiment of the present application discloses an airborne satellite communication system, which includes a modem, and an antenna connected to the modem through an intermediate frequency system;
the modem comprises at least two core protocol board cards 201 adopting different communication protocols, a beam configuration information interaction module 202, a switching connection module 203 for connecting the currently used core protocol board card to an antenna, and a control module 204;
the control module 204 is configured to start a target core protocol board card to be switched and used; calling a current core protocol board card in use, sending the access time and the current position information of a target core protocol board card to a network operation center of the current core protocol board card, acquiring beam configuration information of the target core protocol board card based on feedback information of the network operation center of the current core protocol board card, and writing the beam configuration information into a beam configuration information interaction module; and the control switching connection module switches and connects the target core protocol board card to the antenna so as to call the target core protocol board card, and establishes a communication channel and tracks the satellite according to the beam configuration information read from the beam configuration information interaction module.
Therefore, the airborne satellite communication system disclosed by the embodiment of the application utilizes the current core protocol board card being used as the target core protocol board card to acquire the beam configuration information in advance before switching, saves the time for the target core protocol board card to perform the operation, shortens the interruption time of satellite communication in the satellite link switching process, and effectively improves the continuity and stability of satellite communication signals.
For the specific content of the onboard satellite communication system, reference may be made to the foregoing detailed description of the satellite link switching method of the onboard satellite communication system, and details thereof are not repeated here.
As a specific embodiment, on the basis of the above contents, the currently unused core protocol board cards of the onboard satellite communication system disclosed in the embodiment of the present application are all in a shutdown state or a low power consumption state.
As a specific embodiment, on the basis of the above contents, the onboard satellite communication system disclosed in the embodiment of the present application uses an OpenAMIP interface protocol for communication connection between the currently used core protocol board and the antenna.
As a specific embodiment, on the basis of the above content, the control module 204 of the onboard satellite communication system disclosed in the embodiment of the present application is specifically configured to:
acquiring a downlink carrier frequency, an uplink access power difference value and uplink capture time slot information of a target core protocol board card fed back by a network operation center of the current core protocol board card based on the current core protocol board card; calculating the uplink access power of the target core protocol board card based on the uplink access power difference value; and taking the downlink carrier frequency, the uplink access power and the uplink capture time slot information as the beam configuration information of the target core protocol board card.
As a specific embodiment, on the basis of the above content, the control module 204 of the onboard satellite communication system disclosed in the embodiment of the present application is specifically configured to:
based on the current core protocol board, according to Eup＝EIPR/BWb+ DIFF calculates the uplink access power of the target core protocol board card;
wherein E isupAccessing power for uplink; the EIPR is the read current omnidirectional radiation power of the antenna of the current core protocol board card; BW (Bandwidth)bThe working bandwidth of the current core protocol board card; the DIFF is an uplink access power difference value between the target core protocol board and the current core protocol board.
As a specific embodiment, in the onboard satellite communication system disclosed in the embodiment of the present application, on the basis of the above contents, the network operation center of the current core protocol board is used for: forwarding the access time and the current position information to a network operation center of a target core protocol board card;
the network operation center of the target core protocol board card is used for: and distributing downlink carrier frequency, uplink access power difference value and uplink capture time slot information for the target core protocol board card according to the access time, and feeding back the information to the network operation center of the current core protocol board card.
As a specific embodiment, on the basis of the above contents, the network operation center of the target core protocol board is specifically configured to:
determining downlink carrier frequency according to a beam pattern and load flow of the airborne satellite communication system at the current position;
according to DIFF ═ SNRa/BWa-SNRb/BWb-(G/Ta-G/Tb) Calculating an uplink access power difference value;
wherein, the DIFF is an uplink access power difference value; SNRaThe signal-to-noise ratio of the target core protocol board card is obtained; BW (Bandwidth)aThe working bandwidth of the target core protocol board card is obtained; G/TaThe performance index of a receiver of a satellite transponder corresponding to the target core protocol board card; SNRbThe signal-to-noise ratio of the current core protocol board card; BW (Bandwidth)bThe working bandwidth of the current core protocol board card; G/TbAnd the performance index of the receiver of the satellite transponder corresponding to the current core protocol board card.
As a specific embodiment, on the basis of the above content, the control module 204 of the onboard satellite communication system disclosed in the embodiment of the present application is specifically configured to:
establishing a communication connection relation with an antenna by adopting an OpenAMIP interface protocol based on a target core protocol board card; and establishing a communication channel aiming at the target satellite based on the antenna and tracking the satellite according to the beam configuration information read from the beam configuration information interaction module.
As a specific embodiment, on the basis of the above content, the control module 204 of the onboard satellite communication system disclosed in the embodiment of the present application is specifically configured to:
based on the target core protocol board card according to Tw＝T0+TjCalculating the access time of a target core protocol board card; acquiring current position information of the airborne satellite communication system from the airborne inertial reference system; sending the access time and the current position information to a network operation center of a current core protocol board card;
wherein, TwThe access time of the target core protocol board card is obtained; t is0Is the current time; t isjTime is tracked for OpenAMIP protocol setup and beam pointing.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the equipment disclosed by the embodiment, the description is relatively simple because the equipment corresponds to the method disclosed by the embodiment, and the relevant parts can be referred to the method part for description.
It is further noted that, throughout this document, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The technical solutions provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall into the protection scope of the present application.
Claims (10)
1. A satellite link switching method of an airborne satellite communication system is characterized in that a modem of the airborne satellite communication system comprises at least two core protocol board cards adopting different communication protocols, a beam configuration information interaction module and a switching connection module used for connecting the currently used core protocol board card to an antenna; the method comprises the following steps:
starting up a target core protocol board card which is determined to be switched for use;
based on the current core protocol board card in use, sending the access time and the current position information of the target core protocol board card to a network operation center of the current core protocol board card;
acquiring beam configuration information of the target core protocol board card based on feedback information of a network operation center of the current core protocol board card so as to write the beam configuration information into the beam configuration information interaction module;
switching and connecting the target core protocol board card to an antenna based on the switching and connecting module;
and the target core protocol board card establishes a communication channel and tracks the satellite according to the beam configuration information read from the beam configuration information interaction module.
2. The method of claim 1, wherein the obtaining the beam configuration information of the target core protocol board based on the feedback information of the network operation center of the current core protocol board comprises:
acquiring downlink carrier frequency, uplink access power difference value and uplink capture time slot information of the target core protocol board fed back by a network operation center of the current core protocol board;
calculating the uplink access power of the target core protocol board card based on the uplink access power difference value;
and taking the downlink carrier frequency, the uplink access power and the uplink capture time slot information as the beam configuration information of the target core protocol board card.
3. The method of claim 2, wherein the calculating the uplink access power of the target core protocol board based on the uplink access power difference value comprises:
based on Eup＝EIPR/BWb+ DIFF calculates the uplink access power of the target core protocol board card;
wherein E isupThe uplink access power is obtained; the EIPR is the read current omnidirectional radiation power of the antenna of the current core protocol board card; BW (Bandwidth)bThe working bandwidth of the current core protocol board card is obtained; the DIFF is a difference value of uplink access power between the target core protocol board and the current core protocol board.
4. The method of claim 3, wherein the obtaining of the downlink carrier frequency, the uplink access power difference value, and the uplink capture timeslot information of the target core protocol board fed back by the network operation center of the current core protocol board comprises:
the network operation center of the current core protocol board transmits the access time and the current position information to the network operation center of the target core protocol board;
the network operation center of the target core protocol board card distributes downlink carrier frequency, uplink access power difference value and uplink capture time slot information to the target core protocol board card according to the access time, and feeds the downlink carrier frequency, the uplink access power difference value and the uplink capture time slot information back to the network operation center of the current core protocol board card;
and acquiring the downlink carrier frequency, the uplink access power difference value and the uplink capture time slot information through the network operation center of the current core protocol board card.
5. The method of claim 4, wherein the allocating a downlink carrier frequency and an uplink access power difference value to the target core protocol board comprises:
determining the downlink carrier frequency according to the beam pattern and the load flow of the airborne satellite communication system at the current position;
according to DIFF ═ SNRa/BWa-SNRb/BWb-(G/Ta-G/Tb) Calculating the difference value of the uplink access power;
wherein, DIFF is the difference value of the uplink access power; SNRaThe signal-to-noise ratio of the target core protocol board card; BW (Bandwidth)aThe working bandwidth of the target core protocol board card is obtained; G/TaThe performance index of the receiver of the satellite transponder corresponding to the target core protocol board card is obtained; SNRbThe signal-to-noise ratio of the current core protocol board card; BW (Bandwidth)bThe working bandwidth of the current core protocol board card is obtained; G/TbAnd the performance index of the receiver of the satellite transponder corresponding to the current core protocol board card is obtained.
6. The method according to any one of claims 1 to 5, wherein the performing, by the target core protocol board, communication channel establishment and satellite tracking according to the beam configuration information read from the beam configuration information interaction module includes:
establishing a communication connection relation with an antenna by the target core protocol board card by adopting an OpenAMIP interface protocol;
and establishing a communication channel aiming at a target satellite based on an antenna and tracking the satellite according to the beam configuration information read from the beam configuration information interaction module.
7. The method of claim 6, wherein sending the access time and the current location information of the target core protocol board to a network operation center of the current core protocol board comprises:
according to Tw＝T0+TjCalculating the access time of the target core protocol board card;
wherein, TwThe access time of the target core protocol board card is obtained; t is0Is the current time; t isjEstablishing and beam pointing tracking time for an OpenAMIP protocol;
acquiring current position information of the airborne satellite communication system from an airborne inertial reference system;
and sending the access time and the current position information to a network operation center of the current core protocol board card.
8. An airborne satellite communication system is characterized by comprising a modem and an antenna connected with the modem through an intermediate frequency system;
the modem comprises at least two core protocol board cards adopting different communication protocols, a beam configuration information interaction module, a switching connection module and a control module, wherein the switching connection module is used for connecting the currently used core protocol board card to an antenna;
the control module is used for starting up a target core protocol board card which is determined to be switched for use; calling a current core protocol board card in use, sending the access time and the current position information of the target core protocol board card to a network operation center of the current core protocol board card, acquiring beam configuration information of the target core protocol board card based on feedback information of the network operation center of the current core protocol board card, and writing the beam configuration information into the beam configuration information interaction module; and controlling the switching connection module to switch and connect the target core protocol board card to an antenna so as to call the target core protocol board card, and establishing a communication channel and tracking a satellite according to the beam configuration information read from the beam configuration information interaction module.
9. The system of claim 8, wherein all currently unused core protocol boards are powered off or in a low power state.
10. The system of claim 9, wherein the currently used core protocol board is communicatively coupled to the antenna using an OpenAMIP interface protocol.
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