CN108616857B - Anti-interference Beidou communication equipment and system fusing public network communication - Google Patents
Anti-interference Beidou communication equipment and system fusing public network communication Download PDFInfo
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- CN108616857B CN108616857B CN201810404691.XA CN201810404691A CN108616857B CN 108616857 B CN108616857 B CN 108616857B CN 201810404691 A CN201810404691 A CN 201810404691A CN 108616857 B CN108616857 B CN 108616857B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses anti-interference communication equipment and system fusing public network communication, wherein the equipment comprises a short-range wireless communication module, a public network communication module, a Beidou communication module and a processor; the short-range wireless communication module is used for establishing connection with a sending end to be communicated and receiving a first communication signal sent by the sending end; the processor is used for receiving a first communication signal sent by the short-range wireless communication module, detecting the current public network signal intensity through the public network communication module, sending the first communication signal to the public network communication module when the public network signal intensity is larger than a preset threshold value, and sending the first communication signal to the Beidou communication module when the public network signal intensity is smaller than or equal to the threshold value. The invention can realize 24-hour national uninterrupted network communication, and can ensure timely communication even under the condition that public network signals in remote areas, natural disaster sites, open sea and the like cannot be used.
Description
Technical Field
The invention relates to the technical field of communication, in particular to anti-interference Beidou communication equipment and system fusing public network communication.
Background
The development of wireless communication technology brings great convenience to the life of people, and particularly, the speed of public network signals (2G/3G/4G) is increased and the coverage area is increased continuously, so that people can carry out real-time communication in most places.
At present, public network signals (2G/3G/4G) cover most areas, but some areas, such as mountainous areas, open sea, deserts and the like, cannot be covered due to geographical positions, so that help-seeking signals cannot be sent out timely when outdoor operation or traveling in the areas is dangerous. In addition, under the influence of natural disasters such as earthquakes, the public network communication base station can be damaged, so that public network communication cannot be carried out, the difficulty of rescue can be increased, and the rescue cannot be timely developed.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an anti-interference Beidou communication device and system integrated with public network communication, which can realize 24-hour national uninterrupted network communication and ensure timely communication in remote areas or natural disaster sites.
The embodiment of the invention provides anti-interference Beidou communication equipment fused with public network communication, which comprises a short-range wireless communication module, a public network communication module, a Beidou communication module and a processor; the processor is respectively connected with the short-range wireless communication module, the public network communication module and the Beidou communication module; wherein:
the short-range wireless communication module is used for establishing connection with a sending end to be communicated and receiving a first communication signal sent by the sending end based on the connection;
the processor is used for receiving a first communication signal sent by the short-range wireless communication module, detecting the current public network signal strength through the public network communication module, sending the first communication signal to the public network communication module when the public network signal strength is greater than a preset threshold value, and sending the first communication signal to the Beidou communication module when the public network signal strength is less than or equal to the threshold value;
the public network communication module is used for sending the received first communication signal to a public network communication system;
and the Beidou communication module is used for sending the received first communication signal to the currently tracked satellite.
Preferably, the short-range wireless communication module is an internet of things communication module such as a WiFi module or a bluetooth module; the public network communication module at least comprises one of the following components: 2G module, 3G module, 4G module.
Preferably, the public network communication module is connected with the processor through a USB high-speed serial bus; the short-range wireless communication module is connected with the processor through an SDIO serial bus; the Beidou communication module is connected with the processor through a universal serial synchronous bus.
Preferably, the satellite communication module includes: the system comprises a transmitting antenna, a receiving antenna, a radio frequency conversion chip, an analog-to-digital conversion module, an RDSS baseband chip and a client identification module; the radio frequency conversion chip is connected with the transmitting antenna, the receiving antenna and the analog-to-digital conversion module; the RDSS baseband chip is connected with the analog-to-digital conversion module, the client identification module and the processor.
Preferably, the satellite communication module further comprises a power amplifier and a low noise amplifier; the power amplifier is arranged between the transmitting antenna and the radio frequency conversion chip; the low noise amplifier is arranged between the receiving antenna and the radio frequency conversion chip.
Preferably, the receiving antenna is configured to receive a second communication signal transmitted by a currently tracked satellite, and send the second communication signal to the radio frequency conversion chip;
the radio frequency conversion chip is used for filtering the second communication signal and then sending the second communication signal to the analog-to-digital conversion module;
the analog-to-digital conversion module is used for converting the analog second communication signal into a digital signal, sending the digital signal to the RDSS baseband chip for processing, and sending the processed digital signal to the processor.
Preferably, the RDSS baseband chip is configured to process the second communication signal by using a narrow correlation technique; the receiving bandwidth is determined by a signal modulation mode and a signal tracking method, and the signal sampling frequency and the working frequency of the receiver are selected according to the receiving bandwidth;
the quantization digit of the analog-to-digital conversion module selects the intermediate frequency signal quantized by 2 bits.
Preferably, the RDSS baseband chip is further configured to:
acquiring and tracking a satellite, and distributing a correlator channel for a second communication signal transmitted by the tracked satellite;
configuring parameters for the allocated correlator channels so that the correlator channels can pertinently process communication signals of a specified system and a specified satellite; the configured parameters comprise a pseudo code sequence, a pseudo code period, a pseudo code frequency, a pseudo code initial phase, a correlator branch space and a local carrier frequency;
optimizing the capture probability and the false alarm probability according to the established capture control and tracking loop scheme; and if the state is repeatedly determined between the capturing state and the tracking state for a preset number of times, determining that the state is the false alarm state currently, and controlling to switch to new satellite capturing.
The embodiment of the invention also provides an anti-interference Beidou communication system fusing public network communication, which comprises the following steps: the system comprises a public network communication system, a Beidou satellite commanding and dispatching system, a public network server system and the communication equipment;
the communication equipment is used for receiving a first communication signal sent by a sending end to be communicated and sending the first communication signal to a public network communication system or a currently tracked satellite according to the currently detected public network signal intensity;
the public network communication system is used for sending a first communication signal to the public network server system through a wireless network after receiving the first communication signal;
the Beidou satellite commanding and dispatching system is used for receiving a first communication signal forwarded by the satellite and sending the first communication signal to the public network server system;
and the public network server system is used for demodulating the first communication signal and sending the first communication signal to a corresponding target receiving end.
Preferably, the public network server system is further configured to receive a second communication signal sent by the destination receiving end, and send the second communication signal to a public network communication system or a beidou satellite command and dispatch system according to the communication mode of the first communication signal; when the first communication signal is transmitted through a public network communication system, the second communication signal is sent to the public network communication system; when the first communication signal is transmitted through a Beidou satellite commanding and dispatching system, the second communication signal is sent to the Beidou satellite commanding and dispatching system;
the public network communication system is further configured to send the received second communication signal to the communication device;
the Beidou satellite commanding and dispatching system is further used for sending the received second communication signal to a currently tracked satellite;
the communication device is further configured to receive a second communication signal transmitted by the satellite according to the received signal, and send the second communication signal to the sending end.
The communication equipment and the system provided by the embodiment switch the data transmission channel intelligently by detecting the current public network signal intensity, transmit the first communication signal of the transmitting end through the communication channel of the Beidou communication module when the public network signal is weaker, and seamlessly switch to the public network communication module to transmit the high-speed and high-capacity signals after the public network signal is recovered, so that 24-hour nationwide uninterrupted network communication is realized, and timely communication can be ensured in remote areas or on natural disaster sites.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described 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 that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an anti-interference Beidou communication device integrated with public network communication according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the Beidou communication module of fig. 1.
Fig. 3 is a schematic structural diagram of the rf frequency conversion chip of fig. 2.
Fig. 4 is a schematic structural diagram of an anti-interference Beidou communication system integrated with public network communication according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of the public network communication system of fig. 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
Referring to fig. 1, a first embodiment of the present invention provides an anti-interference Beidou communication device integrated with public network communication, including a short-range wireless communication module 10, a public network communication module 20, a Beidou communication module 30 and a processor 40; the processor 40 is respectively connected with the short-range wireless communication module 10, the public network communication module 20 and the Beidou communication module 30; wherein:
the short-range wireless communication module 10 is configured to establish a connection with a sending end to be communicated, and receive a first communication signal sent by the sending end based on the connection.
In this embodiment, the sending end may be, for example, a mobile phone of a user, which may not have an operating system (function machine), or may have an operating system, such as a saiban system, an android system, an IOS system, and the like, which is not limited in the present invention.
In this embodiment, the short-range wireless communication module 10 includes, but is not limited to, an internet of things communication means such as a WiFi module and a bluetooth module, and is preferably a WiFi module.
For a WiFi module, the communication device opens a hotspot through the WiFi module 10, the transmitting end may connect to the hotspot to establish a connection with the communication device, and after establishing the connection, the transmitting end may transmit a first communication signal to the WiFi module.
It should be noted that the short-range wireless communication module includes an antenna for transceiving signals, and for the WiFi module, the operating frequency band may be 2.4G and/or 5.8 GHz.
The processor 40 is configured to receive a first communication signal sent by the short-range wireless communication module 10, detect a current public network signal strength through the public network communication module 20, send the first communication signal to the public network communication module 20 when the public network signal strength is greater than a preset threshold, and send the first communication signal to the beidou communication module 30 when the public network signal strength is less than or equal to the threshold.
In this embodiment, the processor 40 may be a high performance electronic (STMicroelectronics) micro control unit, which may detect the signal strength of the public network in real time, and when the signal strength of the public network detected by the processor 40 is greater than a preset threshold, it indicates that the signal strength of the public network at the current location is stronger, and the first communication signal may be directly transmitted through the public network communication module 20; the processor 40 sends the first communication signal to the public network communication module 20, and the public network communication module 20 transmits the first communication signal through a public network communication system to send to a corresponding destination receiving end.
When the processor 40 does not detect the public network signal strength or the detected public network signal strength is less than or equal to the threshold value, it indicates that the public network signal strength of the current position is weak, the processor 40 sends the first communication signal to the Beidou communication module 30, the Beidou communication module 30 sends the first communication signal to the currently tracked satellite, the satellite sends the first communication signal to a corresponding Beidou satellite commanding and dispatching system, and the Beidou satellite commanding and dispatching system sends the first communication signal to a corresponding target receiving end.
It should be noted that, in this embodiment, the public network communication module 20 at least includes one of the following: 2G module, 3G module, 4G module. It may include only a single module or may be integrated by multiple modules, and the present invention is not particularly limited.
It should be noted that the public network communication module 20 is connected to the processor 40 through a USB high-speed serial bus; the short-range wireless communication module 10 is connected with the processor 40 through an SDIO serial bus; the Beidou communication module 30 is connected with the processor 40 through a universal serial synchronous bus.
It should be noted that the communication device further includes a ROM and a RAM connected to the processor, and is used for providing a storage space for the processor 40 to operate.
In summary, according to the communication device provided in this embodiment, the data transmission channel is intelligently switched according to the detected current public network signal strength, when the public network signal is weak, the first communication signal at the transmitting end is transmitted through the communication channel of the beidou communication module 30, and when the public network signal is recovered, the public network signal is seamlessly switched to the public network communication module 20 to realize high-speed and high-capacity signal transmission, so that 24-hour nationwide uninterrupted network communication is realized, and timely communication can be ensured in remote areas or natural disaster sites.
Preferably, in another embodiment, as shown in fig. 2, the satellite communication module 30 includes: a transmitting antenna 31, a receiving antenna 32, a radio frequency conversion chip 33, an analog-to-digital conversion module 34, an RDSS baseband chip 35 and a Subscriber Identity Module (SIM) 36; the radio frequency conversion chip 33 is connected with the transmitting antenna 31, the receiving antenna 32 and the analog-to-digital conversion module 34; the RDSS baseband chip 35 is connected to the analog-to-digital conversion module 34, the client identification module 36, and the processor 40.
Preferably, in another embodiment, the satellite communication module 30 further comprises a power amplifier 37 and a low noise amplifier 38; the power amplifier 37 is disposed between the transmitting antenna 31 and the rf frequency conversion chip 33; the low noise amplifier 38 is disposed between the receiving antenna 32 and the rf frequency conversion chip 33.
In this embodiment, the RDSS baseband chip 35 has all-digital quadrature demodulation, a function of obtaining a quadrature dual-channel baseband signal, a fast capture function, a function of generating and transmitting baseband data, a function of controlling a transmission timing sequence, and a protocol processing function. Positioning, timing and communication information can be extracted, and the device has a quick capture function; each receiving channel completes pseudo code fine tracking, carrier recovery, pseudo range measurement and de-spread demodulation of 1 wave beam QPSK modulation signal, initial phase automatic presetting of a GOLD code of a Q branch, carrier-to-noise ratio estimation and Viterbi decoding of I, Q two branches.
In this embodiment, when receiving the second communication signal, the second communication signal transmitted by the satellite is received by the receiving antenna 32, amplified by the low noise amplifier 38, and transmitted to the radio frequency conversion chip 33, the radio frequency conversion chip 33 performs beam filtering, and the analog-to-digital conversion module 34 converts the second communication signal into a digital signal, processes the digital signal by the RDSS baseband chip 35, and then transmits the digital signal to the processor 40. The beam filtering principle of the rf frequency conversion chip 33 is shown in fig. 3.
When signals are sent, the sent first communication signals are transmitted in the reverse direction, are processed sequentially through the RDSS baseband chip 35, are converted through the analog-to-digital conversion module 34, are recombined and encrypted through the radio frequency conversion chip 33, are amplified through the power amplification circuit 37 and are sent to a satellite through the transmitting antenna 31, the satellite receives the first communication signals, sends the first communication signals to the ground Beidou satellite command system, and the first communication signals are received by the Beidou satellite command system and are sent to the public network server system.
In the above embodiment, the communication signals are transmitted and received through the public network communication module or the Beidou communication module, but for the Beidou communication module, the 2G public network signals, the RDSS satellite signals and the RNSS satellite signals are all in the adjacent frequency bands of 1561.098-1793.068M, so that the adjacent frequency interference needs to be solved by rapidly detecting the frequency band signals. In addition, bluetooth signal, WIFI signal and 4G signal can produce the interference to big dipper RDSS-S signal, if do not have anti adjacent channel measure, big dipper signal reception quality near WIFI module, bluetooth module can worsen.
Therefore, in another embodiment of the present invention, the following means is adopted to solve the adjacent frequency interference:
1. the RDSS baseband chip 35 uses narrow correlation technique, and its receiving bandwidth is determined by the signal modulation method and the signal tracking method, and the signal sampling frequency and the receiver operating frequency are selected according to the receiver bandwidth.
The basic signal modulation mode includes: amplitude modulation, frequency modulation, and phase modulation. The signal tracking method comprises carrier frequency tracking, code tracking and the like.
2. Selection of quantization bit number: the number of quantization bits is selected to take into account the correlator resource consumption and gain loss. The present embodiment preferably quantizes the intermediate frequency signal by 2 bits, resulting in a gain loss of about 0.5 dB.
3. Fusion design of channel measurement: the channel measurements are primarily synchronous samples of pseudorange and carrier phase measurements. For pseudorange measurement, measurement is generally performed in fractional phase, chip count, epoch count, or the like. When the correlator channel processes different signals, the number of chips of one epoch varies, the correlator channel is adapted to the situation in which the parameters of the correlator channel are set by said processor 40.
The fusion design of the correlator channel is a hardware basis of the RDSS baseband chip processing fusion design, and in addition, the correlator channel can be configured to process signals of different systems by adding software, so that the acquisition and tracking of different signals are realized on the basis, and the text of different systems is processed in a software part.
To this end, the RDSS baseband chip 35 is also used, by the design software, to:
the satellite is acquired and tracked and a correlator channel is assigned to a second communication signal transmitted by the tracked satellite.
Since the satellite transmits spread spectrum BPSK signal, the target receiving end can recover baseband signal only after de-spreading and demodulation, and correlator is needed to complete these operations. The correlator performs correlation processing by using the locally reproduced carrier frequency and C/A code and the input digital intermediate frequency, removes the carrier frequency and C/A code signal, and obtains various measurement data and state data for calculating pseudo range and navigation message.
In this embodiment, one satellite occupies one correlator channel, and in general, the number of correlator channels is greater than the number of actual satellites in design, when a satellite exits the visible range, the corresponding elevation angle decreases, the carrier-to-noise ratio decreases, and when the tracking threshold is exceeded, the correlator channel no longer tracks the satellite, is in an idle state, and waits for the acquisition engine to acquire a new satellite. The RDSS baseband chip is arranged to capture a new satellite signal by an acquisition engine and then track the new satellite signal by one idle correlator channel.
Configuring parameters for the allocated correlator channels so that the correlator channels can pertinently process communication signals of a specified system and a specified satellite; the configured parameters comprise a pseudo code sequence, a pseudo code period, a pseudo code frequency, a pseudo code initial phase, a correlator branch space and a local carrier frequency.
According to the fusion design concept, the correlator channel can process signals of each system, but before the correlator channel works, specific parameters of the channel need to be set through software, so that the correlator channel can work aiming at signals of a certain satellite of a certain system. The main configuration parameters comprise a pseudo code sequence, a pseudo code period, a pseudo code frequency, a pseudo code initial phase, a correlator branch space, a local carrier frequency and the like, and some parameters corresponding to subsequent text processing and measurement.
Optimizing an acquisition control and tracking loop scheme to optimize acquisition probability and false alarm probability; and if the state is repeatedly determined between the capturing state and the tracking state for a preset number of times, determining that the state is the false alarm state currently, and controlling to switch to new satellite capturing.
Acquisition control and tracking loop processing are typically implemented in an interrupt service routine. The communication device with the fusion design can process a plurality of signals, and the execution efficiency of the acquisition control and tracking loop part program is a main problem, and the optimization of the program flow and the code is needed.
In addition, the capture control strategy affects the capture probability and the false alarm probability (the false alarm probability refers to the probability that no target exists but is judged to be a target due to the common existence and fluctuation of noise when a threshold detection method is adopted in the radar detection process). Specifically, if false alarm occurs, the engine acquisition is successful but the correlator channel cannot track, and the switching between acquisition and tracking is repeated. If missed, this may result in no satellites being acquired. The present embodiment adopts the following solution, the threshold is selected according to the noise level, when in the partial false alarm state, the acquisition confirmation step and flow are added to the false alarm, if the false alarm is considered as 3 times of repetition between the acquisition and the tracking, the new satellite acquisition is switched to.
Referring to fig. 4, a second embodiment of the present invention further provides an anti-interference beidou communication system integrated with public network communication, including: the system comprises a public network communication system 100, a Beidou satellite commanding and dispatching system 200, a public network server system 300 and the communication equipment 400;
the communication device 400 is configured to receive a first communication signal sent by a sending end to be communicated, and send the first communication signal to the public network communication system 100 or a currently tracked satellite according to currently detected public network signal strength;
the public network communication system 100 is configured to send a first communication signal to the public network server system 300 through a wireless network after receiving the first communication signal;
the structure of the public network communication system 100 is shown in fig. 5: wherein the content of the first and second substances,
MS: mobile station (in this embodiment, the communication device 400)
BSS: base station subsystem module
BTS: base transceiver station
BSC: base station controller
NSS: network subsystem module
OMC: operation and maintenance center
MSC: mobile switching center
VLR: roaming subscriber location storage (details will be described later)
HLR: local subscriber location storage (details will be described later)
AUC: authentication center
EIR: equipment sign storage
And OSS: operation support system (also called operation support system)
First, the MS will send a channel request message to the BSS on a Random Access Channel (RACH) to request a dedicated channel (SDCCH), after the BSC successfully assigns the corresponding channel to it, the MS will inform the MS of the dedicated channel assigned to it by an immediate assignment message in an Access Grant Channel (AGCH), and then the MS will send a layer three message, CM service request message, on the SDCCH assigned to it, in which the CM service type is mobile originating call, which is transparently transferred to the MSC by the BSS, after the MSC receives the CM service request message, the VLR is informed to process the access service request of this MS by processing the access request message, (at the same time, since the SCCP has a connection service between the MSC and the BSC, in order to establish SCCP connection, MSC will also return connection confirmation message to BSC), after receiving the service access request, VLR will check whether the MS has three authentication groups in the database, if yes, will issue the authentication command to MSC directly, otherwise, request the authentication parameter to the corresponding HLR/AUC, obtain three groups from HLR/AUC, then issue the authentication command to MSC. After receiving the authentication command sent by VLR, MSC sends an authentication request to MS through BSS, the command contains authentication parameters, after MS receives the authentication request, the IMSI and authentication algorithm in SIM card are used to obtain the authentication result, the authentication result is sent to MSC through authentication response message, MSC sends the authentication result back to VLR, VLR checks the authentication result reported by MS and the result in the authentication parameters obtained from HLR, if the two are not consistent, the access request is rejected, the call is failed; if the two are consistent, the authentication is passed, VLR will firstly issue an encryption command to MSC, then inform MSC that the access request of MS has passed this time, MSC informs MS that the service request has passed through BSS, then MSC issues an encryption command to MS, the command contains an encryption mode, MS receives the command and completes the encryption, and returns an encryption completion message, until MS completes the work of the whole access stage.
The Beidou satellite commanding and dispatching system 200 is configured to receive the first communication signal forwarded by the satellite and send the first communication signal to the public network server system 300.
The public network server system 300 is configured to demodulate the first communication signal and send the demodulated first communication signal to a corresponding destination receiving end.
In this embodiment, the public network server system 300 manages the encrypted data transmitted by the public network communication system 100 and the beidou satellite command and dispatch system 200 in a unified manner, and sends the encrypted data to the corresponding target receiving end through demodulation; and similarly, the data generated by the target receiving end is processed and re-encrypted and then transmitted through the public network communication system and the Beidou satellite commanding and dispatching system 200.
Note that, at the time of reception:
the public network server system 300 is further configured to receive a second communication signal sent by the target receiving end, and send the second communication signal to the public network communication system 100 or the beidou satellite command and dispatch system 200 according to the communication mode of the first communication signal; when the first communication signal is transmitted through the public network communication system, the second communication signal is sent to the public network communication system 100; when the first communication signal is transmitted through the Beidou satellite commanding and dispatching system 200, the second communication signal is sent to the Beidou satellite commanding and dispatching system 200;
the public network communication system 100 is further configured to send the received second communication signal to the communication device 400;
the Beidou satellite commanding and dispatching system 200 is further configured to send the received second communication signal to a currently tracked satellite;
the communication device 400 is further configured to receive a second communication signal transmitted by a satellite according to the first embodiment, and send the second communication signal to the sending end.
The communication system that this embodiment provided switches data transmission channel through detecting current public network signal intensity intelligence, transmits the first communication signal of sending end through big dipper communication module's communication channel when public network signal is less strong, and seamless switching carries out high-speed large capacity signal transmission to public network communication module after public network signal resumes to realize 24 hours national uninterrupted network communication, guarantee also can carry out timely communication in remote area or at natural disaster scene.
Illustratively, the above-mentioned computer programs may be partitioned into one or more modules/units, which are stored in the memory and executed by the processor to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may be used for storing the computer program and/or the module, and the processor may implement various functions of the block chain oriented dynamic hash calculation node by executing or executing the computer program and/or the module stored in the memory and calling data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
All or part of the flow of the method of the embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium and executed by a processor, to instruct related hardware to implement the steps of the embodiments of the methods. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (6)
1. The anti-interference Beidou communication equipment fused with public network communication is characterized by comprising a short-range wireless communication module, a public network communication module, a Beidou communication module and a processor; the processor is respectively connected with the short-range wireless communication module, the public network communication module and the Beidou communication module; wherein:
the short-range wireless communication module is used for establishing connection with a sending end to be communicated and receiving a first communication signal sent by the sending end based on the connection;
the processor is used for receiving a first communication signal sent by the short-range wireless communication module, detecting the current public network signal strength through the public network communication module, sending the first communication signal to the public network communication module when the public network signal strength is larger than a preset threshold value, and sending the first communication signal to the Beidou communication module when the public network signal strength is smaller than or equal to the threshold value;
the public network communication module is used for sending the received first communication signal to a public network communication system so as to send the first communication signal to a target receiving end through the public network communication system;
the Beidou communication module is used for sending the received first communication signal to a currently tracked satellite so as to forward the first communication signal to a target receiving end through the satellite;
the satellite communication module includes: the system comprises a transmitting antenna, a receiving antenna, a radio frequency conversion chip, an analog-to-digital conversion module, an RDSS baseband chip and a client identification module; the radio frequency conversion chip is connected with the transmitting antenna, the receiving antenna and the analog-to-digital conversion module; the RDSS baseband chip is connected with the analog-to-digital conversion module, the client identification module and the processor;
the receiving antenna is used for receiving a second communication signal transmitted by a currently tracked satellite and sending the second communication signal to the radio frequency conversion chip; the radio frequency conversion chip is used for filtering the second communication signal and then sending the second communication signal to the analog-to-digital conversion module; the analog-to-digital conversion module is used for converting the analog second communication signal into a digital signal, sending the digital signal to the RDSS baseband chip for processing, and sending the processed digital signal to the processor;
solving the problem of adjacent frequency interference on the RDSS baseband chip, and processing the second communication signal by adopting a narrow correlation technique; the receiving bandwidth is determined by a signal modulation mode and a signal tracking method, and the signal sampling frequency and the working frequency of the receiver are selected according to the receiving bandwidth;
the quantization digit of the analog-to-digital conversion module selects an intermediate frequency signal quantized by 2 bits;
fusion design using channel measurement: the channel measurement is synchronous sampling of pseudo range and carrier phase measurement, and the pseudo range measurement is measured according to decimal phase, chip count and epoch count;
acquiring and tracking a satellite through the RDSS baseband chip, and distributing a correlator channel for a second communication signal emitted by the tracked satellite; configuring parameters for the allocated correlator channels so that the correlator channels can pertinently process communication signals of a specified system and a specified satellite; the configured parameters comprise a pseudo code sequence, a pseudo code period, a pseudo code frequency, a pseudo code initial phase, a correlator branch space and a local carrier frequency; optimizing the capture probability and the false alarm probability according to the established capture control and tracking loop scheme; selecting a threshold according to the noise level, adding capture confirmation to the partial false alarm state when the state is judged to be in the partial false alarm state according to the threshold, confirming that the state is the false alarm state currently if the state is repeatedly preset times between the capture state and the tracking state, and controlling to switch to new satellite capture;
the number of correlator channels is greater than the number of actual satellites, when the satellites exit the visual range, the corresponding elevation angle is reduced, the carrier-to-noise ratio is reduced, when the tracking threshold is exceeded, the correlator channels do not track the satellites any more and are in an idle state, and a capturing engine is waited to capture new satellites; the RDSS baseband chip is arranged to capture a new satellite signal by an acquisition engine and then track the new satellite signal by one idle correlator channel.
2. The anti-interference Beidou communication equipment converged with public network communication according to claim 1, wherein the short-range wireless communication module comprises but is not limited to a WiFi module and a Bluetooth module; the public network communication module at least comprises one of the following components: 2G module, 3G module, 4G module.
3. The anti-interference Beidou communication equipment fused with public network communication according to claim 1, wherein the public network communication module is connected with the processor through a USB high-speed serial bus; the short-range wireless communication module is connected with the processor through an SDIO serial bus; the Beidou communication module is connected with the processor through a universal serial synchronous bus.
4. The anti-interference Beidou communication equipment fused with public network communication according to claim 1, wherein the satellite communication module further comprises a power amplifier and a low noise amplifier; the power amplifier is arranged between the transmitting antenna and the radio frequency conversion chip; the low noise amplifier is arranged between the receiving antenna and the radio frequency conversion chip.
5. The utility model provides an anti-interference big dipper communication system who fuses public network communication which characterized in that includes: a public network communication system, a Beidou satellite command and dispatching system, a public network server system and the anti-interference Beidou communication equipment integrating public network communication, wherein the anti-interference Beidou communication equipment is defined in any one of claims 1 to 4;
the communication equipment is used for receiving a first communication signal sent by a sending end to be communicated and sending the first communication signal to a public network communication system or a currently tracked satellite according to the currently detected public network signal intensity;
the public network communication system is used for sending a first communication signal to the public network server system through a wireless network after receiving the first communication signal;
the Beidou satellite commanding and dispatching system is used for receiving a first communication signal forwarded by the satellite and sending the first communication signal to the public network server system;
and the public network server system is used for demodulating the first communication signal and sending the first communication signal to a corresponding target receiving end.
6. The anti-interference Beidou communication system converged with public network communication according to claim 5,
the public network server system is also used for receiving a second communication signal sent by the target receiving end and sending the second communication signal to a public network communication system or a Beidou satellite commanding and dispatching system according to the communication mode of the first communication signal; when the first communication signal is transmitted through a public network communication system, the second communication signal is sent to the public network communication system; when the first communication signal is transmitted through a Beidou satellite commanding and dispatching system, the second communication signal is sent to the Beidou satellite commanding and dispatching system;
the public network communication system is further configured to send the received second communication signal to the communication device;
the Beidou satellite commanding and dispatching system is further used for sending the received second communication signal to a currently tracked satellite;
the communication device is further configured to receive a second communication signal transmitted by the satellite according to the received signal, and send the second communication signal to the sending end.
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| CN109450828B (en) * | 2018-11-05 | 2020-05-29 | 北京理工大学 | Signal processing chip |
| CN109788529A (en) * | 2019-03-13 | 2019-05-21 | 广东海聊科技有限公司 | A kind of Big Dipper short message combination GSM network scheduling communication method and system |
| CN111132080A (en) * | 2019-12-09 | 2020-05-08 | 北航（四川）西部国际创新港科技有限公司 | Self-adaptive seamless switching system and method for multi-network converged communication |
| CN111130622A (en) * | 2019-12-18 | 2020-05-08 | 北方信息控制研究院集团有限公司 | Novel cluster communication system based on multi-satellite link and communication method thereof |
| CN113504550A (en) * | 2021-08-17 | 2021-10-15 | 上海司南卫星导航技术股份有限公司 | RDSS-compatible RNSS receiver, RNSS system, and computer-readable storage medium |
| CN116665509B (en) * | 2023-06-02 | 2024-02-09 | 广东精天防务科技有限公司 | Parachute simulated training information processing system and parachute simulated training system |
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