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CN114448494A - Communication device - Google Patents

Communication device
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Publication number
CN114448494A
CN114448494ACN202111650259.7ACN202111650259ACN114448494ACN 114448494 ACN114448494 ACN 114448494ACN 202111650259 ACN202111650259 ACN 202111650259ACN 114448494 ACN114448494 ACN 114448494A
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processor
communication
antenna
communication device
communicate
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CN202111650259.7A
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CN114448494B (en
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陈著明
赵自知
陈华鹏
吴启俊
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Shenzhen Feisi Communication Technology Co ltd
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Shenzhen Feisi Communication Technology Co ltd
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Abstract

The application provides a communication device, which comprises a control chip internally provided with a first processor, a second processor and a memory, wherein the first processor and the second processor are respectively coupled with the memory, the first processor is used for operating a first operating system and controlling a first antenna to communicate with a satellite, and the second processor is used for operating a second operating system and controlling a second antenna to communicate with a ground network and a third antenna to communicate with an airborne terminal.

Description

Communication device
Technical Field
The invention relates to the technical field of airborne communication, in particular to communication equipment.
Background
With the wide popularization and use of mobile internet and personal intelligent communication, the cabin broadband communication shows a huge application prospect, and the airborne phased array antenna is combined with other technologies, so that abundant aviation information services can be provided for airlines. The high-flux satellite communication system can realize the communication rate of tens of million per second, can provide voice and large-flow data communication services for aviation management, and can also provide services such as internet, teleworking and the like for passengers in a cabin of an aircraft.
The mobile satellite airborne phased array communication-in-motion terminal is airborne aviation communication core equipment, the requirements on the communication quality and the communication efficiency of an airborne phased array antenna are extremely high, and the existing airborne phased array antenna is difficult to meet the requirements of an airborne aviation mobile satellite terminal.
Disclosure of Invention
The embodiment of the application provides a communication device, which is characterized by comprising a control chip internally provided with a first processor, a second processor and a memory, wherein the first processor and the second processor are respectively coupled with the memory, the first processor is used for operating a first operating system and controlling a first antenna to communicate with a satellite, and the second processor is used for operating a second operating system and controlling a second antenna to communicate with a ground network and a third antenna to communicate with an airborne terminal.
The communication equipment provided by the application can communicate with a satellite through the first antenna, can also communicate with a ground network through the third antenna, can communicate with an airborne terminal through the second antenna simultaneously, and then can provide two channels with external communication for the airborne terminal, and airborne terminal accessible communication equipment communicates with the satellite promptly, also can communicate with the ground network through communication equipment.
In addition, the first processor, the second processor and the memory are arranged in the control chip, so that the occupied space of the communication equipment is reduced, the weight of the communication equipment is reduced, the power consumption and the heat productivity of the communication equipment are reduced, and the operation stability of the communication equipment is improved. The first processor and the second processor respectively run different operating systems, so that the adaptability of the communication device can be improved, namely, the communication device can adaptively process different circuits.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a communication device on an aircraft according to an embodiment of the present application;
fig. 2 is a block diagram schematically illustrating a structure of a communication device according to an embodiment of the present application;
FIG. 3 is a block diagram schematically illustrating the structure of the communication device in the embodiment of FIG. 2;
FIG. 4 is a schematic block diagram of a partial structure of the communication device in the embodiment of FIG. 2;
fig. 5 is a flow chart of a star task of a communication device in an embodiment of the present application;
FIG. 6 is a schematic diagram of a logic interface of a control chip according to an embodiment of the present application;
FIG. 7 is a flowchart illustrating a first phase start-up of a control chip according to an embodiment of the present application;
FIG. 8 is a flow chart of a second stage start-up of the control chip in the embodiment of FIG. 7;
FIG. 9 is a schematic circuit diagram of a logic block of a communication device in an embodiment of the present application;
FIG. 10 is a circuit schematic diagram of a multicore processor of the communication device in the embodiment of FIG. 9;
FIG. 11 is a diagram of a software architecture of a communication device in an embodiment of the present application;
fig. 12 is an APP system architecture diagram of a communication device in an embodiment of the present application.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be noted that the following examples are only illustrative of the present invention, and do not limit the scope of the present invention. Likewise, the following examples are only some but not all examples of the present invention, and all other examples obtained by those skilled in the art without any inventive step are within the scope of the present invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.
Based on this, the embodiment of the present application provides a communication device to solve the above technical problem.
Referring to fig. 1, fig. 1 is a schematic structural diagram of acommunication device 10 in an aircraft according to an embodiment of the present application. In this embodiment, thecommunication device 10 may be disposed on top of an aircraft to improve the communication quality of wireless communication between thecommunication device 10 and thesatellite 20 or a terrestrial network. Alternatively, thecommunication device 10 may be located elsewhere on the aircraft. It will be appreciated that thecommunication device 10 is positioned to avoid interference with the communication signal.
Referring to fig. 2, fig. 2 is a schematic block diagram of acommunication device 10 according to an embodiment of the present application. In this embodiment, thecommunication device 10 may communicate with thesatellite 20 to enable communication between thecommunication device 10 and a satellite network, and/or thecommunication device 10 may communicate with thebase station 30 to enable communication between thecommunication device 10 and a terrestrial network. Thecommunication device 10 may communicate with the on-board terminal 40, that is, the on-board terminal 40 may communicate with thesatellite 20 and/or thebase station 30 via thecommunication device 10. In some embodiments of the present application, thecommunication device 10 may further enable communication with thecloud back stage 50 via thesatellite 20 and/or thebase station 30, so that the on-board terminal 40 may enable communication with thecloud back stage 50 via thecommunication device 10.
Specifically, thecommunication device 10 may include acontrol chip 100, afirst antenna 210, asecond antenna 220, and athird antenna 230. Thecommunication device 10 can communicate with thesatellite 20 via thefirst antenna 210, thecommunication device 10 can communicate with thebase station 30 via thesecond antenna 220, and thecommunication device 10 can communicate with the on-board terminal 40 via thethird antenna 230. Wherein thecontrol chip 100 is configured to control thefirst antenna 210 to communicate with thesatellite 20, i.e. thecontrol chip 100 may be used to control thefirst antenna 210 to transceive communication signals between thecommunication device 10 and thesatellite 20. Thecontrol chip 100 is further configured for controlling thesecond antenna 220 to communicate with thebase station 30, i.e. thecontrol chip 100 may be used for controlling thesecond antenna 220 to transceive communication signals between thecommunication device 10 and thebase station 30. Thecontrol chip 100 is further configured to control thethird antenna 230 to communicate with the on-board terminal 40, i.e. thecontrol chip 100 may be used to control thethird antenna 230 to transceive communication signals between thecommunication device 10 and the on-board terminal 40.
Thefirst antenna 210 may be an antenna array, which is formed by feeding and spatially arranging two or more single antennas operating at the same frequency according to a certain requirement, that is, the antenna array is an antenna system formed by arranging a plurality of identical single antennas according to a certain rule, and antenna radiation units forming the antenna array are called array elements. The basic principle of the method is that after a microprocessor receives control information containing communication directions, the phase shift amount of each phase shifter is calculated according to an algorithm provided by control software, and then the phase shift process is completed by controlling a feed network through an antenna controller. The phase shift can compensate the time difference generated when the same signal reaches different array elements, so that the in-phase superposition of the output of the antenna array reaches the maximum. Once the signal direction changes, the maximum pointing direction of the antenna array beam can be changed correspondingly by adjusting the phase shift amount of the phase shifter, so that beam scanning and tracking are realized. In the present embodiment, thefirst antenna 210 is used to enable communication between thecommunication device 10 and thesatellite 20.
Thesecond antenna 220 may be an antenna of a 4G/5G communication module, and the 4G/5G communication module is a communication module capable of receiving an electromagnetic wave signal transmitted by thebase station 30 and converting the electromagnetic wave signal into an internal transmission signal of thecommunication device 10, and converting the internal transmission signal of thecommunication device 10 into an electromagnetic wave signal and transmitting the electromagnetic wave signal to thebase station 30. In the present embodiment, thesecond antenna 220 is used to enable communication between thecommunication device 10 and thebase station 30.
Wherein thethird antenna 230 may be an antenna of a router for forwarding the network signal to the on-board terminal 40. Thethird antenna 230 may be an omni-directional antenna, which is an antenna having no maximum radiation and reception direction in the horizontal plane, or a directional antenna, which is an antenna having one or more directions having maximum radiation and reception capabilities. In the present embodiment, thethird antenna 230 is used to enable communication between thecommunication device 10 and the on-board terminal 40.
In the aviation process, theonboard terminal 40 in the aircraft needs to perform information interaction with the outside to meet a series of requirements of theonboard terminal 40, such as device positioning, log reporting, data downloading, software upgrading and the like, thecommunication device 10 generally adopts communication with a ground network to reduce cost, however, the communication mode is easily affected by factors such as terrain, weather and the setting of thebase station 30, and therefore, the ground network communication may have situations of poor communication state or even communication interruption during the aircraft navigation process, in comparison, the satellite communication between thecommunication device 10 and thesatellite 20 is a communication mode with higher reliability, but the satellite communication cost is higher, and a great cost waste is caused by adopting the satellite communication for a long time. Based on this, the applicant provides acommunication device 10 capable of switching between terrestrial network communication and satellite communication according to actual conditions, wherein thecommunication device 10 can communicate with the terrestrial network for a long time to reduce communication cost, and switch to satellite communication when the communication state of the terrestrial network is not good, and switch to terrestrial network communication when the communication state of the terrestrial network is good.
To realize the communication with thesatellite 20 and/or thebase station 30, thecommunication device 10 not only needs to have the function of tracking thesatellite 20 quickly in real time, but also needs to provide the functions of wireless routing, WIFI wireless signals, accessing 4G/5G network signals, terminal APP control display function, fault diagnosis, etc., and it is difficult to satisfy the functional requirements of thecommunication device 10 as an airborne mobile satellite terminal by a single operating system. Therefore, the embodiment of the present application provides acommunication device 10 that can run at least two operating systems simultaneously, so as to meet the design requirements of thecommunication device 10.
The applicant finds in research that the FreeRTOS operating system is an open-source embedded real-time operating system, has the characteristics of source code disclosure, portability, collectability, flexible scheduling strategy and the like, is suitable for being used as a satellite-pursuing algorithm with high real-time requirement, a combined navigation algorithm and a fault protection function (overcurrent and overvoltage) with high real-time requirement of an onboard phased array communication-in-motion terminal function of thecommunication equipment 10, and can meet the requirements of thecommunication equipment 10 on fast real-time tracking of atarget satellite 20 and the design and development of a fault diagnosis protection function; the Linux operating system is an open source operating system, has the functions of multi-user multitasking, safety and stability, good portability, high modularization degree, rich network functions and the like, and is suitable for functional design and development of wireless routing, WIFI wireless signals, access 4G/5G network signals, terminal APP control display functions, fault diagnosis and the like of thecommunication equipment 10. Therefore, the embodiment of the present application provides acommunication device 10 that can run the FreeRTOS operating system and the Linux operating system at the same time to meet the design requirements of thecommunication device 10.
It is to be understood that the selection of the two operating systems is adopted according to the design requirements of thecommunication device 10 in the embodiment of the present application, and the present application is not limited to the selection of the two specific operating systems, and any operating system that can meet the design requirements of the present invention is within the optional scope.
It should be noted that the terms "first", "second" and "third" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Further, referring to fig. 3, fig. 3 is a schematic block diagram of a structure of thecommunication device 10 in the embodiment of fig. 2. In this embodiment, thecontrol chip 100 may have afirst processor 110, asecond processor 120 and amemory 130 built therein, thefirst processor 110 being configured to run a first operating system, such as a FreeRTOS operating system, and control thefirst antenna 210 to communicate with thesatellite 20, thesecond processor 120 being configured to run a second operating system, such as a Linux operating system, and control thesecond antenna 220 to communicate with thebase station 30, and control thethird antenna 230 to communicate with the on-board terminal 40. Thefirst processor 110 and thesecond processor 120 are respectively coupled to thememory 130, that is, thefirst processor 110 and thesecond processor 120 may share the memory to realize data interaction. Of course, in other embodiments, thefirst processor 110 and thesecond processor 120 may also be used to run other different operating systems, respectively, to meet the communication requirements of thecommunication device 10.
It is noted that the term "coupled" is used herein to encompass any direct or indirect connection. Therefore, if the first element is coupled to the second element, it means that the first element can be directly connected to the second element through an electrical connection or a signal connection such as wireless transmission or optical transmission, or indirectly connected to the second element through another element or a connection means.
In an embodiment, thecommunication device 10 may further include afrequency converter 300 and acarrier receiver 400. Thefrequency converter 300 is connected to thefirst antenna 210, and is configured to perform frequency conversion processing on a communication signal received and transmitted by thefirst antenna 210 and output a frequency-converted signal. Thecarrier receiver 400 is connected to thefrequency converter 300 and thefirst processor 110, respectively, and is configured to receive the frequency-converted signal output by thefrequency converter 300 and perform signal strength detection on the frequency-converted signal, so as to output a detection signal to thefirst processor 110. Thefirst processor 110 is connected to thecarrier receiver 400, and controls a communication state between thefirst antenna 210 and thesatellite 20, that is, controls an attitude of an antenna array of thefirst antenna 210 based on the detection signal output from thecarrier receiver 400.
Specifically, thefirst antenna 210 communicates with thesatellite 20 by receiving directional satellite signals and transmitting a directional beam. The satellite signal received by thefirst antenna 210 is processed by thefrequency converter 300 and then transmitted to thecarrier receiver 400; thecarrier receiver 400 receives the frequency-converted data signal, and performs signal strength detection on the data signal to feed back the detected data signal strength to thefirst processor 110 in real time. The first processor controls the attitude of thefirst antenna 210 based on the magnitude of the data signal strength, that is, controls the antenna array to face the direction corresponding to the maximum value of the data signal strength, so that the beam of the antenna array points to the direction of the maximum value of the satellite signal strength, and the communication effectiveness between thefirst antenna 210 and thesatellite 20 is the best.
Further, thefirst processor 110 may also write communication status data between thefirst antenna 210 and thesatellite 20 to thememory 130. Thesecond processor 120 may read the communication status data in thememory 130 and control the on-board terminal 40 to communicate with thesatellite 20 and/or control the on-board terminal 40 to communicate with thebase station 30, i.e., the ground network, according to the communication status between thefirst antenna 210 and thesatellite 20.
In an embodiment, thecommunication device 10 may further include amodem 500, arouter 600, and aground pass module 700. Wherein themodem 500 is connected to thesecond processor 120 for communication with thefirst antenna 210. Therouter 600 is connected to thesecond processor 120 and themodem 500, respectively, for communicating with the on-board terminal 40 via thethird antenna 230. The ground throughmodule 700 is connected to therouter 600 for communicating with thebase station 30 through thesecond antenna 220, so that therouter 600 can communicate with the ground network through thesecond antenna 220, and the ground throughmodule 700 can be a 4G/5G communication module. Further, thesecond processor 120 is used for configuring themodem 500 and therouter 600, and thesecond processor 120 may switch the communication mode of the on-board terminal 40 with the outside to the communication with thesatellite 20 through thefirst antenna 210 and/or the communication with thebase station 30, i.e., the terrestrial network, through thesecond antenna 220 in combination with the communication state data between thefirst antenna 210 and thesatellite 20 and the external instruction stored in thememory 130.
In an embodiment, themodem 500 may be further connected to thefrequency converter 300 and thecarrier receiver 400, respectively, thefrequency converter 300 may process the received satellite signal and output the processed satellite signal to thecarrier receiver 400, and thecarrier receiver 400 may transmit the received satellite signal (i.e., the processed frequency-converted signal by the frequency converter 300) to themodem 500, so that the on-board terminal 40 can receive the satellite signal. Themodem 500 may further transmit the received signal sent by the on-board terminal 40 to thefrequency converter 300, and further may transmit the signal to thesatellite 20 via thefirst antenna 210 after being processed by thefrequency converter 300, so as to implement communication between the on-board terminal 40 and thesatellite 20. Preferably, themodem 500 is connected to thefrequency converter 300 and thecarrier receiver 400 in a wireless communication manner, respectively, that is, themodem 500 can convert signals sent by the on-board terminal 40 into radio frequency signals and send the radio frequency signals to thefrequency converter 300, and thecarrier receiver 400 is configured to send the received frequency-converted signals to themodem 500 by means of radio frequency signal transmission.
Themodem 500 is mainly used for performing modulation, demodulation and network functions of transmitting and receiving signals, and can communicate with therouter 600 by using a TCP/IP protocol. Thesecond processor 120 may be used to configure themodem 500 and therouter 600 so that themodem 500 may communicate with thefirst antenna 210, and the communication of thesecond processor 120 with themodem 500 and therouter 600 may also take the TCP/IP protocol. Therouter 600 may communicate with thebase station 30 through thesecond antenna 220 of themodule 700 and may also communicate with the on-board terminal 40 through thethird antenna 230.
Specifically, the on-board terminal 40 may communicate with therouter 600 through thethird antenna 230, and the data signal is modulated and demodulated by themodem 500, processed by thefrequency converter 300, and transmitted to thesatellite 20 through thefirst antenna 210. The on-board terminal 40 may also receive a satellite signal through thecommunication device 10, that is, the satellite signal is transmitted to thefrequency converter 300 through thefirst antenna 210, and the data signal processed by thefrequency converter 300 is modulated and demodulated by themodem 500 and then transmitted to therouter 600, and further transmitted to the on-board terminal 40 through thethird antenna 230. As can be appreciated, therouter 600 may wirelessly communicate with the on-board terminal 40 through thethird antenna 230, i.e., wirelessly communicate with the on-board terminal 40 through a WiFi network; therouter 600 may also be in wired communication with the on-board terminal 40 via a connection line, and therouter 600 and the on-board terminal 40 may be connected via an RJ45 interface.
Among them, the on-board terminal 40 may be a device that receives/transmits a communication signal via a wireless interface, and the on-board terminal 40 configured to communicate through the wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.
In addition, the on-board terminal 40 may further communicate with a ground network through thecommunication device 10, specifically, the on-board terminal 40 may communicate with thesecond antenna 220 through therouter 600, thesecond antenna 220 may be a 4G/5G communication module, and the on-board terminal 40 may communicate with thebase station 30 through thesecond antenna 220, thereby achieving communication with the ground network. The 4G/5G communication module may be connected to therouter 600 through a PCIE interface.
Further, thecommunication device 10 may communicate with thecloud backend 50 through thesatellite 20 and/or thebase station 30, for example, obtain the communication status data of thefirst antenna 210 through the shared memory for local log storage and remote data transmission back to the server. Further, the on-board terminal 40 may also communicate with thecloud backend 50 via thesatellite 20 and/or thebase station 30, for example, to remotely download upgrade packages to implement device software upgrades.
Further, thesecond processor 120 may also switch the communication mode of the on-board terminal 40 with the outside to the communication with thesatellite 20 through thefirst antenna 210 and/or the communication with thebase station 30 through thesecond antenna 220 in combination with the communication state between thefirst antenna 210 and thesatellite 20 and the external instruction. Wherein, the external instruction may be a communication state change of thecommunication device 10 with the outside, for example, when thecommunication device 10 exceeds a signal coverage area of a radio network or communication with a ground network is interrupted for other reasons, thesecond processor 120 may control thecommunication device 10 to communicate with thesatellite 20 to prevent the on-board terminal 40 from interrupting communication with the outside; when communication between thecommunication device 10 and thesatellite 20 is interrupted, thesecond processor 120 may control thecommunication device 10 to communicate with the ground network, and may further send fault information to the cloud backoffice 50, and/or receive maintenance information from the cloud backoffice 50. The external command may be command information received by thecommunication device 10 from the outside, for example, thecommunication device 10 receives the command information from thecloud background 50 through thesatellite 20 and/or thebase station 30, and controls a communication mode between thecommunication device 10 and the outside according to the command information.
Generally, theonboard terminal 40 will exchange information with the outside through the terrestrial network communication, because the cost of the terrestrial network communication is much lower than that of the satellite communication, and because the signals communicated with the outside by thebase station 30 are omnidirectional signals, thecommunication device 10 can communicate with thebase station 30, and further theonboard terminal 40 can communicate with thebase station 30 within the coverage area of the radio signal network. Therefore, theonboard terminal 40 is a desirable embodiment to exchange information with the outside through the ground network communication. Of course, since the ground network communication is easily affected by the terrain, weather, and other factors, and is in a poor communication state, or even in a case of communication interruption, in the embodiment provided in the present application, thesecond processor 120 may control the on-board terminal 40 to switch the communication method with the outside from the ground network communication to the satellite communication when the ground network communication state is poor, and control the on-board terminal 40 to switch the communication method with the outside back to the ground network communication when the ground network communication state is good. Since thefirst processor 110 can adjust the attitude of thefirst antenna 210 in real time so that the communication state between thefirst antenna 210 and thesatellite 20 can be always kept good, thesecond processor 120 can control the communication mode of the on-board terminal 40 with the outside to be switched to the communication with thesatellite 20 through thefirst antenna 210 and/or the communication with the ground network through thethird antenna 230 in combination with the communication state data read from thememory 130 and the external instruction. Of course, in the embodiment of the present application, the on-board terminal 40 may also perform information interaction with the outside through both ground network communication and satellite communication.
Continuing to refer to fig. 4, fig. 4 is a schematic block diagram of a portion of thecommunication device 10 in the embodiment of fig. 2. In this embodiment, thecontrol chip 100 may further include alogic circuit 140, thelogic circuit 140 is connected between thefirst processor 110 and thefirst antenna 210, and thefirst processor 110 may concurrently communicate with a plurality of elements of the antenna array through thelogic circuit 140.
In research, the applicant finds that, currently, a communication terminal on an aircraft generally directly adopts software to control an antenna array, and the software control is performed according to a certain sequence, that is, a time difference exists between a first small array and a last small array of the antenna array, which may result in prolonging the phase interval adjustment time, and even cause inconsistency of control phases of the small arrays, thereby causing reduction of tracking accuracy and deterioration of transceiving performance. In this embodiment, thefirst processor 110 may control the plurality of elements of the antenna array concurrently through thelogic circuit 140, so as to prevent a time difference between the plurality of elements of the antenna array during the control.
Further, thecommunication device 10 may further include at least oneperipheral circuit 150, and theperipheral circuit 150 may be connected to thelogic circuit 140 to enable thelogic circuit 140 to communicate with theperipheral circuit 150 while communicating with the antenna array. Thefirst processor 110 may communicate with at least oneperipheral circuit 150 through thelogic circuit 140 to drive at least one component of thecommunication device 10 or implement level conversion, for example, thefirst processor 110 may communicate with thecarrier receiver 400 through thelogic circuit 140 and theperipheral circuit 150, and the serial interface standard of thecontrol chip 100 and thecarrier receiver 400 may be RS 232.
In one embodiment, theperipheral circuitry 150 may include apositioning sensing circuit 151 and an inertialnavigation sensing circuit 152. Thelocation sensing circuit 151 may be coupled to thelogic circuit 140 and configured to obtain latitude and longitude location information of the location of thecommunication device 10 and further output the location information to thefirst processor 110. The inertialnavigation sensing circuit 152 may be connected to thelogic circuit 140 and configured to obtain the attitude information of thecommunication device 10 and further output the attitude information to thefirst processor 100.
Thepositioning sensing circuit 151 may be a sensing circuit integrated with a positioning sensor (e.g., GNSS, GPS) and capable of acquiring latitude and longitude location information of the location of thecommunication device 10. The inertialnavigation sensing circuit 152 may be a sensing circuit integrated with an inertial navigation sensor (e.g., IMU) and operable to acquire pose information of thecommunication device 10. Thefirst processor 110 may control the attitude of thefirst antenna 210 in real time based on the position information and the attitude information acquired as described above. In an embodiment, the serial standard of thecontrol chip 100 and the positioning sensor may be RS232, and the serial standard of thecontrol chip 100 and the inertial navigation sensor may be RS 422.
In one embodiment, theperipheral circuit 150 may further include atemperature sensing circuit 153 and aheat dissipation unit 154. Thetemperature sensing circuit 153 may be connected to thelogic circuit 140 and configured to obtain temperature information of thecommunication device 10 and further output the temperature information to thefirst processor 110. Theheat dissipation unit 154 may be connected to thelogic circuit 140 and used to dissipate heat of thecommunication device 10 under the control of thefirst processor 110. That is, thefirst processor 110 may control theheat dissipation unit 154 to dissipate heat of thecommunication device 10 based on the acquired temperature information.
Thetemperature sensing circuit 153 may be a sensing circuit integrated with a temperature sensor and capable of acquiring temperature information of relevant devices on thecommunication device 10 in real time. Theheat dissipation unit 154 may be a device such as a heat dissipation fan that can perform heat dissipation under the control of thefirst processor 110. Thefirst processor 110 is connected to theperipheral circuit 150 through thelogic circuit 140, so that thefirst processor 110 can control theheat dissipation unit 154 to dissipate heat of thecommunication device 10 based on the acquired temperature information. In one embodiment, the temperature sensor may communicate via a GPI/O interface and the cooling fan may be controlled via PWM modulation.
In one embodiment, theperipheral circuit 150 may further include anindication unit 155 and apower supply 156, and theindication unit 155 and thepower supply 156 may be respectively connected to thelogic circuit 140. Theindication unit 155 may be a light-emitting device such as an indicator lamp or a sound-emitting device such as a speaker for displaying status information of thecommunication apparatus 10 by emitting light or sound under the control of thefirst processor 110. The status information of thecommunication device 10 includes, but is not limited to, a power status, a fault status, etc. Thepower supply 156 is used to supply power to thecommunication device 10, and can collect and obtain voltage and current of each module of thecommunication device 10 to monitor the status of each module. In an embodiment, theindication unit 155 may be an LED lamp panel and may communicate through a GPI/O interface, and thepower supply 156 may communicate through a serial peripheral interface SPI.
Specifically, thefirst processor 110 may obtain, through thelogic circuit 140, inertial measurement information of the inertialnavigation sensing circuit 152, satellite navigation information of thepositioning sensing circuit 151, and a detection signal fed back by thecarrier receiver 400, and further obtain the position of thesatellite 20 in periodic motion through calculation.
Referring to fig. 5, fig. 5 is a flowchart illustrating a star task of thecommunication device 10 according to an embodiment of the present application. The applicant researches and discovers that the posture of a carrier must be calculated in real time when the satellite is aimed at the moving carrier, and the satellite aiming service is designed into a periodic cycle integral task synchronous with the output updating of the IMU according to the integral characteristic and the real-time requirement of a navigation algorithm.
In this embodiment, thefirst processor 110 first performs inertial/satellite integrated navigation by using the inertial measurement information and the satellite navigation information to output the antenna attitude of thefirst antenna 210, and then calculates the beam pointing angle by using the antenna attitude and the satellite vector, and meanwhile, finely adjusts the beam of thefirst antenna 210 by using the detection signal to always point to the direction of the maximum signal value, and when the maximum signal value is updated effectively, uses the equivalent bearing pointed by the beam for bearing measurement of the integrated navigation.
Specifically, when the IMU information is updated, firstly, inertial measurement information of a navigation algorithm is input, if the GPS information is updated and valid at this time, guidance information is input, and then navigation calculation is completed and navigation state, current attitude and position information of the antenna, and the like are output. And when the navigation state is the alignment completion, the positioning is effective and the beam information is effective, starting a tracking algorithm. And circulating the above flow until the signal is locked and maintained.
The applicant researches and discovers that the real-time performance requirement of the operating system of thefirst processor 110 on the star pursuit algorithm and the combined navigation algorithm required by the implementation of the star process is high, so that thefirst processor 110 can run a FreeRTOS operating system to meet the high real-time performance requirement. Through the above process, thefirst processor 110 may control parameters such as the transmission frequency, polarization, azimuth angle, and pitch angle of thefirst antenna 210, control the beam direction of thefirst antenna 210 in real time, isolate adverse factors such as the carrier motion state and direction change, ensure that the beam of thefirst antenna 210 is aligned with thesatellite 20, and implement uninterrupted communication between thecommunication device 10 and thesatellite 20, so that the communication state between thefirst antenna 210 and thesatellite 20 is always kept good, thereby ensuring that thecommunication device 10 can switch theairborne terminal 40 and the external communication mode to satellite communication at any time.
Further, thefirst processor 110 writes the communication state data of thefirst antenna 210 and thesatellite 20 into thememory 130, and thesecond processor 120 reads the communication state data and controls the switching of the mode of the on-board terminal 40 for communicating with the outside in combination with the external command. In turn, the on-board terminal 40 may communicate with thesatellite 20 and/or thebase station 30 through thecommunication device 10, and in turn, the on-board terminal 40 may perform information interaction with thecloud background 50, where thecloud background 50 may be a cloud server.
Further, theairborne terminal 40 may perform information interaction with thecloud background 50 through satellite communication and/or ground network communication, so as to meet various functional requirements in the aircraft navigation process, including but not limited to user management operations such as registration, login, logout, deletion, query, information entry, password modification, error code prompt and log trigger reporting, device state information and log periodic reporting, device remote upgrading, heartbeat keep-alive, and the like, which are realized through information interaction between theairborne terminal 40 and thecloud background 50. For example, thecloud background 50 may upload the upgrade package to the inside of the control system through the WiFi network using TFTP, and perform version upgrade by a command; or after the system is connected to the corresponding internet, the APP can prompt upgrading by comparing the device version with the background version, and the user can obtain the upgrade package from the background for upgrading by clicking the upgrade trigger device.
Referring to fig. 6, fig. 6 is a schematic diagram of a logic interface of thecontrol chip 100 according to an embodiment of the present disclosure. Thecontrol chip 100 may simultaneously package a logic module (PL module) which may include thelogic circuit 140 and a dual ARM core processor (PS module) which may include thefirst processor 110, thesecond processor 120, and thememory 130. Thefirst processor 110 and thesecond processor 120 may be both ARM core processors, and the two ARM cores also support an AMP mode, that is, thefirst processor 110 and thesecond processor 120 may run different programs or run different operating systems, respectively, and the two processors may share a memory and a peripheral device, which increases flexibility of system scheme design; the logic module can customize interface pins, expand interfaces according to actual requirements, simultaneously have a module concurrency function, and can improve the running speed of thecommunication equipment 10.
Further, thelogic circuit 140 of thecontrol chip 100 has a parallel operation function, for example, as long as the FreeRTOS operating system sends an instruction to the logic module, a plurality of array elements of the antenna array can receive the instruction at the same time; thelogic circuit 140 also has a function of self-defining an interface, that is, thelogic circuit 140 can freely expand the interface according to actual requirements to couple a plurality of modules; further, thelogic 140 may be coupled to a plurality ofperipheral circuits 150, thereby enabling thefirst processor 110 to communicate with the plurality ofperipheral circuits 150 through thelogic 140.
Thepositioning sensing circuit 151 is integrated with the positioning sensor (GNSS or GPS)810, the inertialnavigation sensing circuit 152 is integrated with the inertial navigation sensor (IMU)820, thetemperature sensing circuit 153 is integrated with thetemperature sensor 830, theheat dissipation unit 154 is theheat dissipation fan 840, and theindication unit 155 is theindicator panel 850.
Thecommunication device 10 can adjust the temperature of each module in real time in a PID control manner. Specifically, thecommunication device 10 may be provided with a preset temperature, for example, 25 ℃, and when thetemperature sensor 830 detects that the temperature exceeds the preset temperature, the temperature information is sent to thefirst processor 110, and thefirst processor 110 may perform voltage control on the coolingfan 840 through the PID adjuster, and then cool the module with the excessively high temperature until the temperature of the module is lower than the preset temperature. It can be understood that the module with the excessively high temperature may be any component that may be heated, and the preset temperature is not limited to 25 ℃ in this embodiment.
Further, thefirst processor 110 may control the plurality ofheat dissipation fans 840 concurrently through thelogic circuit 140. In this embodiment, the control of the 6cooling fans 840 only needs to start one duty ratio, and the 6cooling fans 840 can receive control commands at the same time to eliminate the sequential control time interval. In this embodiment, theheat dissipation fan 840 is a component for dissipating heat, and it is understood that in other embodiments of the present application, thecommunication device 10 may also adopt other components that can be used for dissipating heat, and the number of theheat dissipation fans 840 is not limited to this embodiment.
In addition, thecommunication device 10 may further have a fault alarm function, thefirst processor 110 may obtain fault information of each module of thecommunication device 10 in real time and write the fault information into thememory 130, and thesecond processor 120 may control thefirst antenna 210 to communicate with thesatellite 20, and/or control thesecond antenna 220 to communicate with the ground network, and/or control thethird antenna 230 to communicate with the on-board terminal 40 in combination with the fault information.
Specifically, thefirst processor 110 may obtain the status of each module in real time, and when thefirst processor 110 detects fault information of the module, such as module overcurrent, overvoltage, overtemperature, etc., the fault information may be written into thememory 130. In other words, the respective modules of thecommunication device 10 may perform fault self-checking, for example: the GNSS module fault, the IMU module fault, the antenna array fault, thecarrier receiver 400 fault, the coolingfan 840 fault, and the like, and thecontrol chip 100 fault self-diagnoses faults such as overcurrent, overvoltage, and overtemperature faults, and can display the fault state through theindicator lamp panel 850 and/or theonboard terminal 40, and store the fault log in the local FLASH.
Further, thesecond processor 120 may obtain fault information data of thecommunication device 10, and then send a fault state of thecommunication device 10 to theonboard terminal 40 and/or thecloud backend 50, and then thesecond processor 120 may perform fault maintenance on thecommunication device 10 by combining the fault information and the external instruction received by thesecond antenna 220 and/or thethird antenna 230.
Thecommunication device 10 provided by the application reduces the complexity of hardware arrangement and routing inside thecommunication device 10 by placing the PS module and the PL module in thesame control chip 100, thereby improving the communication reliability of thecommunication device 10, reducing the maintenance requirement of thecommunication device 10, reducing the occupation of thecommunication device 10 to the space, reducing the weight of thecommunication device 10, reducing the power consumption and the heat productivity of thecommunication device 10, and improving the operation stability of thecommunication device 10. In addition, according to the embodiment of the application, three independent software partitions are stored in thecontrol chip 100, so that the software confidentiality is improved, and the cracking difficulty is increased.
Further, please refer to fig. 7 and fig. 8 in combination, in which fig. 7 is a flowchart illustrating a first stage start-up of thecontrol chip 100 according to an embodiment of the present application, and fig. 8 is a flowchart illustrating a second stage start-up of thecontrol chip 100 according to the embodiment of fig. 7.
In this embodiment, thefirst processor 110 and thesecond processor 120 may communicate with each other through AXI, INT, IO, the logic module may include a BRAM and a MicroBlaze soft core running in the internal BRAM, the PL module and the PS module may be respectively coupled and shared with the DDR, and the processor program may run an application program in the DDR. Wherein, BRAM is a block memory, MicroBlaze soft core is a simplified instruction set processor soft core which can be embedded in a logic module, and DDR is a double-rate synchronous dynamic random access memory.
The PS module may be provided with a non-secure mode start-up procedure, which respectively is:
starting a first stage: power-on reset,second processor 120 reads the FBSL image and runs inmemory 130 whilefirst processor 110 is in a wait for event state. Where FBSL is the boot loader of thecontrol chip 100.
And the second stage is started: after jumping to FSBL, firstly carrying out system initialization, after the system initialization is finished, carrying out equipment initialization, then obtaining the head information of the mirror image partition, if the verification is enabled, enabling RSA algorithm verification, judging whether the partition is encrypted or not after the verification is finished, directly loading the partition to a corresponding address without encryption, decrypting the encryption of the partition, decrypting through an AES-HMAC algorithm module, judging whether the partition is a PS module partition or not, exiting to JTAG protocol output if the partition is not the PS module partition, and jumping to the PS module partition to execute ARM application program if the partition is the PS module partition.
The third stage starts: the PS module application executes, thesecond processor 120 writes the program execution address of thefirst processor 110 to theaddress 0xffffff 0 and releases the SEV event to wake up thefirst processor 110, and thefirst processor 110 jumps to run after detecting that the data at theaddress 0xffff 0 is not0x 0.
In this embodiment, thecontrol chip 100 simultaneously encapsulates the PL module and the dual ARM core PS module, and the two ARM cores further support the AMP mode, that is, thefirst processor 110 and thesecond processor 120 may run different programs or run different operating systems, respectively, and thefirst processor 110 and thesecond processor 120 may share a memory and a peripheral device, in this embodiment, thefirst processor 110 loads a FreeRTOS program, thesecond processor 120 loads a Linux program, the FreeRTOS application reads and writes a PL module logic file, and the Linux application shares the memory to implement communication between thefirst processor 110 and thesecond processor 120. In the program loading process, the FSBL, the adapter module design file, the system boot program, the application and the operating system are integrated into an image, and then the image is loaded into a flash memory of the system.
With continuing reference to fig. 9 and 10, fig. 9 is a schematic circuit diagram of a logic module of thecommunication device 10 in an embodiment of the present application, and fig. 10 is a schematic circuit diagram of a multi-core processor of thecommunication device 10 in the embodiment of fig. 9.
In this embodiment, the logic module may be coupled to thefirst antenna 210, thecarrier receiver 400, the positioning sensor 810(GPS, Beacon), the inertial navigation sensor 820(IMU), the temperature sensor 830(TEMP), the heat dissipation Fan 840(Fan), the indicator lamp 850(LED), and the POWER supply 860(POWER) at the same time, so that the PS module may be coupled to a plurality of peripheral circuits indirectly by coupling to the logic module, thereby facilitating PCB routing, improving the integration level, further improving the communication reliability of thecommunication device 10, and reducing the maintenance requirement of thecommunication device 10. It will be appreciated that the logic module may also extend more interfaces according to the actual requirements.
In the present embodiment, thecontrol chip 100 further includes a memory (QSPI _ FLASH) for storing external data, a DDR for operation, a PS debug module for loading and debugging the Linux system, and a network transformer as a gateway.
Referring to fig. 11, fig. 11 is a software architecture diagram of thecommunication device 10 according to an embodiment of the present application. In this embodiment, the software scheme of thecommunication device 10 adopts a hierarchical architecture, which includes an application layer, a service logic layer, a protocol layer, and a driver layer. The application layer is divided into Linux multithreading application and a FreeRTOS real-time operating system, thecontrol chip 100 comprises a dual-core processor, the software application operation adopts an AMP (asymmetric multiprocessing) mode, thesecond processor 120 runs the Linux system and additional services with low real-time requirements, thefirst processor 110 runs the FreeRTOS and algorithm services with high real-time requirements, and the inter-core communication realizes data transmission in a shared memory mode. The system comprises a FreeRTOS system, a Linux operating system and a task module, wherein the FreeRTOS system supports preemptive task scheduling so as to realize the functions of a task module with high requirement on adjustability and instantaneity, such as a satellite capturing function, a satellite tracking function, a sensor data acquisition function and the like, and the Linux operating system supports a TCP protocol and/or a UDP protocol so as to realize multithreading network application;modem 500 configures and obtains current beam information frommodem 500, communication protocol (opemip), and obtains dual system current status, network software upgrades, etc. over WIFI or the internet.
In addition, the applicant researches and discovers that the data update rate of thecarrier receiver 400 can be 1 millisecond, the inertial navigation data update rate of theinertial navigation sensor 820 can be 2.5 milliseconds, the position data update rate of thepositioning sensor 810 can be 100 milliseconds, and although the position data update rate of the Linux operating system can be 1 millisecond, the Linux operating system is crashed due to frequent timing calculation, so that the FreeRTOS operating system is better in the aspect of acquiring and tracking satellite functions. The phased array antenna array surface adopts a phase shifter chip to realize beam switching, the switching time is in a microsecond level, thecontrol chip 100 and a bidirectional system control time is in a millisecond level, in order to realize high-speed and reliable communication between the antenna array and thecontrol chip 100, an HDLC high-speed communication mode is adopted, the protocol format is self-defined, thecontrol chip 100 integrates a double system of a processing module and logic module logic, the logic can self-define the communication protocol format, and the reliability and the confidentiality of the system are improved.
In addition, the communication between thecontrol chip 100 and the antenna array adopts a self-defined protocol, by using the relevant characteristics of HDLC, 0_1111_1110 of 9bit is always transmitted when the transmission is idle, and the data needs to be transmitted and received through a "transcoding data mapping table", that is: the transmitting end of thecontrol chip 100 converts 8-bit data to be transmitted into 9-bit data, and then transmits the 9-bit data to the antenna array; when receiving, thecontrol chip 100 needs to convert the received 9-bit code stream into 8-bit data, and then performs protocol analysis. And the reliability of communication is improved by transcoding data mapping.
Further, thecommunication device 10 may also implement various functions of the aircraft through information interaction with theonboard terminal 40 and thecloud background 50. In an embodiment of the present application, an application module is loaded on theonboard terminal 40, where the application module may be a mobile phone APP service application, a functional module may be loaded in an operating system run by thesecond processor 120, and thecloud background 50 may be a cloud service virtual machine loaded in a public network environment. The application module may directly access the functional module through therouter 600, and after thecommunication device 10 accesses the satellite network, the application module is connected to thecloud backend 50 through thecommunication device 10.
Further, please refer to fig. 12 in combination, fig. 12 is an APP system architecture diagram of thecommunication device 10 according to an embodiment of the present application. The APP application module may be mounted on the Linux system of thesecond processor 120, and the function module may be divided into an APP interface processing module, a control plane processing module, and a maintenance management function module. The APP interface module is mainly used for uniformly processing the connection of all the APP application modules, monitoring and receiving messages sent by all the application modules and sending functional module messages to the corresponding application modules; the control plane processing module mainly processes the APP message data sent by the interface module and responds to the signaling.
Furthermore, the control plane processing module can be subdivided into two sub-modules, namely an AUM sub-module and an ASM sub-module, and respectively and correspondingly manages and processes APP user data and a communication system control instruction; the maintenance management module is mainly used for performing maintenance management work such as log printing, KPI statistics, background data sending, log uploading, upgrading and downloading and the like; thecommunication device 10 may also implement a log storage function by storing communication information, and then query a fault storage log through APP and WiFi, store fault information of all devices and software systems, record data information such as satellite beam switching information, signal strength information and time, and count time of no fault during operation of the device.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some interfaces, indirect coupling or communication connection between devices or units, and may be in an electrical or other form.
In summary, thecommunication device 10 provided by the present application controls thefirst antenna 210 to communicate with thesatellite 20 through thefirst processor 110, so as to improve the effectiveness of communication between thecommunication device 10 and thesatellite 20, and obtain the communication state between thecommunication device 10 and thesatellite 20; the interaction of the communication state data between thefirst processor 110 and thesecond processor 120 is realized through thememory 130 coupled with thefirst processor 110 and thesecond processor 120, respectively; thesecond antenna 220 is controlled by thesecond processor 120 to communicate with the on-board terminal 40, and thethird antenna 230 is controlled to communicate with the ground network, so that thesecond processor 120 can control the on-board terminal 40 to communicate with the ground network or thesatellite 20 by combining the communication state data and the external command, thereby improving the communication quality and the communication efficiency of thecommunication device 10.
Further, in the embodiment of the present application, thesecond processor 120 controls thethird antenna 230 to communicate with the on-board terminal 40 and controls thesecond antenna 220 to communicate with the ground network, so that thesecond processor 120 may control the on-board terminal 40 to communicate with the ground network and/or thesatellite 20 in combination with the communication state data and the external instruction, thereby improving the communication quality and the communication efficiency of thecommunication device 10 and reducing the communication cost of thecommunication device 10.
Further, according to thecommunication device 10 provided by the present application, thefirst processor 110, thesecond processor 120, thememory 130, thelogic circuit 140, and theperipheral circuit 150 are embedded in onecontrol chip 100, so that the complexity of hardware arrangement and routing inside thecommunication device 10 is reduced, the communication reliability of thecommunication device 10 is further improved, the maintenance requirement of thecommunication device 10 is reduced, meanwhile, the occupation of thecommunication device 10 on the space is reduced, the weight of thecommunication device 10 is reduced, the power consumption and the heat generation amount of thecommunication device 10 are reduced, and the operation stability of thecommunication device 10 is improved.
The integrated unit may be stored in a computer readable memory if it is implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, the technical solution of the present application may be substantially implemented or a part of or all or part of the technical solution contributing to the prior art may be embodied in the form of a software product stored in a memory, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the above-mentioned method of the embodiments of the present application. And the aforementioned memory comprises: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Those skilled in the art will appreciate that all or part of the steps of the methods of the above embodiments may be implemented by a program, which is stored in a computer-readable memory, the memory including: flash Memory disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. It will be understood by those skilled in the art that all or part of the steps in the methods of the above embodiments may be implemented by hardware related to instructions of a program, and the program may be stored in a device with a storage function.
The above description is only a part of the embodiments of the present invention, and not intended to limit the scope of the present invention, and all equivalent devices or equivalent processes performed by the present invention through the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

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