CN109195196A - The method of earth station and unmanned plane autonomous pairing work frequency point and spreading code - Google Patents
The method of earth station and unmanned plane autonomous pairing work frequency point and spreading code Download PDFInfo
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- CN109195196A CN109195196A CN201811263218.0A CN201811263218A CN109195196A CN 109195196 A CN109195196 A CN 109195196A CN 201811263218 A CN201811263218 A CN 201811263218A CN 109195196 A CN109195196 A CN 109195196A
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- unmanned plane
- earth station
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- spreading code
- uplink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
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Abstract
The invention discloses a kind of methods of earth station and unmanned plane autonomous pairing work frequency point and spreading code, can reduce pairing time-consuming to avoid manual operation using the present invention, can increase pairing flexibility.The technical scheme is that: the autonomous pairing process of unmanned plane starting selects uplink working frequency points and uplink spreading code according to uplink spectrum sensing results；Broadcast message is sent by broadcast channel ground station；Earth station chooses a frame unmanned plane and is accessed, and selects downlink working frequency point and downstream spread spectrum code, sends access information to unmanned plane by access channel；Unmanned plane chooses an earth station as access earth station is permitted, to permit the downlink working frequency point and downstream spread spectrum code that access earth station sends, working frequency points and spreading code as the transmission of unmanned plane downlink telemetry communication business；Earth station terminates autonomous pairing process as the working frequency points and spreading code of uplink with the uplink working frequency points and uplink spread spectrum that access unmanned plane transmission.
Description
Technical field
The present invention relates to the method more particularly to unmanned plane of a kind of unmanned plane and earth station's pairing and earth station's working frequency points
With the matching method of spreading code.
Technical background
Unmanned plane (Unmanned Aerial Vehicle, be abbreviated as UAV) is that one kind is manipulated and provided for oneself by remote control system
The non-manned vehicle of process control.UAV TT & C's communication system is the information network and control system of unmanned plane, except realization
Outside to the remote-control romote-sensing of unmanned plane, tracking and positioning and data information transfer function, while state of flight and mission bit stream are carried out
Monitoring in real time and record, performance and scale largely determine the performance and scale of entire UAV system.In general,
UAV TT & C's communication system is made of two parts equipment: a part is on unmanned plane, referred to as airborne TTC & DT Systems, packet
Include airborne telemetry communication terminal and antenna；Another part is on ground control station, referred to as ground observing and controlling communication system, including ground
Face telemetry communication terminal and antenna.UAV TT & C's communication system functionally includes one and is used for ground control station to aircraft
And airborne equipment control uplink (also cry commander link) and one be used to receive under unmanned plane telemetering or load data
Line link.The general bandwidth of uplink is 10Kb/s-200Kb/s, and no matter when ground control station request sends order, uplink
Road must assure that and transmit at any time.Downlink provides two channels.One is that current flight is transmitted for control station to the ground
The status channel (also referred to as telemeter channel) of the information such as speed, engine speed and airborne equipment state, the channel need smaller
Bandwidth, be similar to commander link.Article 2 channel transmits sensor information for control station to the ground, it needs enough bands
Width transmits a large amount of sensor information, bandwidth range 300Kb/s-10Mb/s.General downlink all continuously transmits, but
Sometimes also can temporarily start on conveyer keep in etc. data to be sent.
In order to guarantee the successful capture of UAV TT & C's signal of communication, ground/airborne telemetry communication terminal receiver work
Frequency point needs are matched with airborne/ground observing and controlling communication terminal transmitter working frequency points.Meanwhile in order to guarantee telemetry communication signal
Correct demodulation, the frequency expansion sequence that ground/airborne telemetry communication terminal receiver uses also need logical with airborne/ground observing and controlling
The frequency expansion sequence matching that letter terminal transmitter uses.Therefore, the matching of ground observing and controlling communication terminal and airborne telemetry communication terminal,
I.e. earth station is that UAV TT & C communicates the premise effectively to work with " pairing " of unmanned plane.
Currently, the pairing of earth station and unmanned plane is generally accomplished manually by manipulator, i.e., before unmanned plane takes off, manipulator
Earth station and unmanned plane are configured in advance respectively, to realize the pairing of working frequency points and spreading code.When earth station in system
When increasing with unmanned plane quantity, this method faces pairing, and time-consuming, manpower bears the problems such as big.Simultaneously as every pairing ginseng
Number is to configure in advance, when spectrum environment changes in the unmanned plane course of work, when certain section of frequency spectrum is interfered, unmanned plane with
Earth station due to do not have take off after the ability matched again, thus can only maintain initially to match parameter, this will lead to communication chain
Road performance decline in addition it is unavailable.Therefore, it is necessary to provide a kind of matching side configured independent of manpower intervention and in advance
Method matches the problems such as time-consuming, and manpower burden is big, and flexibility is poor to solve earth station and unmanned plane.
Summary of the invention
The purpose of the present invention is matching the problems such as time-consuming, and manpower burden is big, and flexibility is poor for earth station and unmanned plane,
A kind of method that earth station independently matches with unmanned plane is provided, is matched quick, the flexible machine of prosthetic intervention may be implemented.
Above-mentioned purpose of the invention can be reached by the following measures, a kind of earth station and the autonomous pairing work of unmanned plane
The method of frequency point and spreading code, it is characterised in that include the following steps: the autonomous pairing process of unmanned plane starting, according to uplink spectrum
Sensing results select uplink working frequency points and uplink spreading code；Broadcast message is sent by broadcast channel ground station；Earth station
Broadcast singal is captured, a frame unmanned plane is chosen and is accessed, save the broadcast message of access unmanned plane, and according to downstream spectrum sense
Know as a result, downlink working frequency point and downstream spread spectrum code are selected, by accessing channel to unmanned plane transmission access information；Unmanned plane root
Signal is accessed according to capture, an earth station is chosen as access earth station is permitted, sends access using access acknowledgement channel and permit
Instruction, to permit the downlink working frequency point and downstream spread spectrum code that access earth station sends, as unmanned plane downlink telemetry communication industry
The working frequency points and spreading code of business transmission；Earth station permits instruction according to access is received, to access the uplink of unmanned plane transmission
Working frequency points and uplink spread spectrum terminate independently to match convection current as the working frequency points and spreading code of the transmission of uplink telemetry communication business
Journey.
The present invention has the effect that compared with the prior art
Compared to artificial matching method, the present invention can reduce pairing process by the way of independently matching to avoid manual operation
Time-consuming reduces manpower burden；Compared to based on the matching method configured in advance, the present invention can change in working environment
When, real-time perfoming is matched again, increases pairing flexibility.
The present invention is suitable for wireless communication field.
Detailed description of the invention
Fig. 1 is the schematic diagram of UAV TT & C's communication system.
Fig. 2 is earth station of the present invention and the autonomous matching method flow chart of unmanned plane.
Fig. 3 is the specific example of Fig. 2 earth station Yu the autonomous matching method of unmanned plane.
Invention will be further explained below with reference to the drawings and examples..
Specific embodiment
Refering to fig. 1, Fig. 2.According to the present invention, define in UAV TT & C's communication system as shown in Figure 1 earth station to nobody
The link of machine is downlink, and the link of unmanned plane to earth station is uplink.UAV TT & C's communication system includes M ground
Face station and N number of unmanned plane.During autonomous pairing, the autonomous pairing process of unmanned plane starting, according to uplink spectrum sensing results,
Select uplink working frequency points and uplink spreading code；Broadcast message is sent by broadcast channel ground station；Earth station's capture broadcast
Signal is chosen a frame unmanned plane and is accessed, saves the broadcast message of access unmanned plane, and according to downstream spectrum sensing results,
Downlink working frequency point and downstream spread spectrum code are selected, access information is sent to unmanned plane by access channel；Unmanned plane is according to capture
Signal is accessed, an earth station is chosen as access earth station is permitted, sends access using access acknowledgement channel and permit instruction, with
Downlink working frequency point and downstream spread spectrum code that access earth station sends are permitted, as the transmission of unmanned plane downlink telemetry communication business
Working frequency points and spreading code；Earth station permits instruction according to access is received, to access the uplink working frequency points of unmanned plane transmission
It is spread with uplink, as the working frequency points and spreading code of the transmission of uplink telemetry communication business, terminates autonomous pairing process.
In the autonomous pairing process, the trigger condition that unmanned plane starts pairing includes but is not limited to device power-up, link
It interrupts, be reconfigured to telecommand etc.；The acquisition methods of the result of uplink/downlink frequency spectrum perception include but is not limited to power detection
Method, transpositions domain etc.；The selection gist of uplink/downlink working frequency points is interference strength, preferentially selects noiseless or interference smaller
Working frequency points, the selection mode of uplink/downlink spreading code is random selection.The broadcast channel of different unmanned planes is using different
Spreading code, and uniquely determined by unmanned plane ID number；Broadcast message includes unmanned plane ID number, uplink working frequency points and uplink spreading code
Deng；The basis for selecting for accessing unmanned plane includes but is not limited to broadcast signal power power, unmanned plane priority, distance etc.；
Channel is accessed using the spreading code as the broadcast channel of access unmanned plane；Access channel includes earth station's ID number, accesses really
Recognize channel spread code, downlink working frequency point and downstream spread spectrum code etc.；Permit access earth station basis for selecting include but is not limited to
Access signal power power, earth station's priority, distance etc.；Access acknowledgement channel is to permit accessing connecing for earth station's transmission
Enter spreading code of the acknowledgement channel spreading code as the channel；Broadcast channel, access channel and access acknowledgement channel are independently to match
To control channel, distinguished using different working frequencies.
Refering to Fig. 3, as earth station quantity M=2, unmanned plane quantity N=2, tool that earth station and unmanned plane independently match
Body process is as follows:
Unmanned plane 1 and 2 starts autonomous pairing process simultaneously and selects uplink working frequency points respectively according to uplink spectrum sensing results
With uplink spreading code；Broadcast message is sent by respective broadcast channel respectively simultaneously；Earth station 1 and 2 captures unmanned plane 1
With 2 broadcast singal, earth station 1 chooses unmanned plane 1 and is accessed, and and saves the broadcast message of unmanned plane 1, earth station 2
It chooses unmanned plane 1 to be accessed, and saves the broadcast message of unmanned plane 1；Earth station 1 and 2 perceives according to downstream spectrum tie respectively
Fruit selects downlink working frequency point and downstream spread spectrum code, while sending access information by respective access channel respectively；Unmanned plane
1 captures the access signal of earth station 1 and 2, chooses earth station 1 as allowance access earth station；Unmanned plane 1 utilizes access confirmation
Channel ground station 1 sends access and permits instruction, and the downlink working frequency point and downstream spread spectrum code that are sent using earth station 1 are as nothing
The working frequency points and spreading code of man-machine 1 downlink telemetry communication business transmission；Earth station 1 receives access and permits instruction, with nobody
Uplink working frequency points and uplink that machine 1 is sent spread the working frequency points and spreading code transmitted as uplink telemetry communication business；Nothing
Man-machine 1 autonomous pairing process terminates, and unmanned plane 2 independently matches process and wait time-out will automatically eventually since no earth station accesses
Only.
The embodiment of the present invention has been described in detail above, and specific embodiment used herein carries out the present invention
It illustrates, in the explanation of above embodiments, the data such as earth station's quantity and unmanned plane quantity are merely used to help understand the present invention
Method and apparatus；At the same time, for those skilled in the art, according to the thought of the present invention, in specific embodiment and
There will be changes in application range, in conclusion the content of this specification embodiment should not be construed as to limit of the invention
System.
Claims (10)
1. a kind of method of earth station and unmanned plane autonomous pairing work frequency point and spreading code, it is characterised in that including walking as follows
Rapid: the autonomous pairing process of unmanned plane starting selects uplink working frequency points and uplink spreading code according to uplink spectrum sensing results；
Unmanned plane sends broadcast message by broadcast channel；Earth station captures broadcast singal, chooses a frame unmanned plane and is accessed, and protects
Deposit the broadcast message of access unmanned plane；Earth station selects downlink working frequency point and downlink spread spectrum according to downstream spectrum sensing results
Code sends access information by access channel；Unmanned plane capture access signal chooses an earth station as allowance access ground
It stands；Unmanned plane sends access using access acknowledgement channel and permits instruction, to permit the downlink working frequency point that access earth station sends
The working frequency points and spreading code transmitted with downstream spread spectrum code as unmanned plane downlink telemetry communication business；Ground station reception to access
Instruction is permitted, to access the uplink working frequency points and uplink spread spectrum of unmanned plane transmission, as the transmission of uplink telemetry communication business
Working frequency points and spreading code；Autonomous pairing process terminates, and completes earth station and independently matches with unmanned plane.
2. the method for earth station as described in claim 1 and unmanned plane autonomous pairing work frequency point and spreading code, feature exist
In: in the autonomous pairing process, unmanned plane start pairing trigger condition include: but be not limited to device power-up, link down,
Reconfiguration is to telecommand.
3. the method for earth station as described in claim 1 and unmanned plane autonomous pairing work frequency point and spreading code, feature exist
In: the acquisition methods of the result of uplink/downlink frequency spectrum perception include but is not limited to power detection method, transpositions domain.
4. the method for earth station as described in claim 1 and unmanned plane autonomous pairing work frequency point and spreading code, feature exist
In: the selection gist of uplink/downlink working frequency points is interference strength, preferentially selects the noiseless or lesser working frequency points of interference,
The selection mode of uplink/downlink spreading code is random selection.
5. the method for earth station as described in claim 1 and unmanned plane autonomous pairing work frequency point and spreading code, feature exist
In: broadcast message includes unmanned plane ID number, uplink working frequency points and uplink spreading code；The broadcast channel of different unmanned planes is not using
Same spreading code, and uniquely determined by unmanned plane ID number.
6. the method for earth station as described in claim 1 and unmanned plane autonomous pairing work frequency point and spreading code, feature exist
In: the basis for selecting for accessing unmanned plane includes but is not limited to broadcast signal power power, unmanned plane priority, distance.
7. the method for earth station as described in claim 1 and unmanned plane autonomous pairing work frequency point and spreading code, feature exist
In: access channel includes earth station's ID number, access acknowledgement channel spreading code, downlink working frequency point and downstream spread spectrum code；Access letter
Road uses the spreading code as the broadcast channel of access unmanned plane.
8. the method for earth station as described in claim 1 and unmanned plane autonomous pairing work frequency point and spreading code, feature exist
In: the basis for selecting for permitting access earth station includes but is not limited to access signal power power, earth station's priority, apart from remote
Closely；Access acknowledgement channel is to permit accessing the access acknowledgement channel spreading code of earth station's transmission as the spreading code of the channel；Extensively
Broadcasting channel, access channel and access acknowledgement channel is autonomous pairing control channel, is distinguished using different working frequencies.
9. the method for earth station as described in claim 1 and unmanned plane autonomous pairing work frequency point and spreading code, feature exist
In: as earth station M=2, unmanned plane N=2, unmanned plane 1 and unmanned plane 2 start autonomous pairing process simultaneously, respectively according to upper
Line frequency composes sensing results, selects uplink working frequency points and uplink spreading code, while being sent extensively by respective broadcast channel respectively
Broadcast information；Earth station 1 and earth station 2 capture the broadcast singal of unmanned plane 1 and unmanned plane 2, and earth station 1 chooses unmanned plane 1
Accessed, and and save the broadcast message of unmanned plane 1, earth station 2 also chooses unmanned plane 1 and is accessed, and saves unmanned plane 1
Broadcast message；Earth station 1 and earth station 2 select downlink working frequency point and downlink to expand respectively according to downstream spectrum sensing results
Frequency code, while access information is sent by respective access channel respectively.
10. the method for earth station as claimed in claim 9 and unmanned plane autonomous pairing work frequency point and spreading code, feature exist
In: unmanned plane 1 captures the access signal of earth station 1 and 2, chooses earth station 1 as allowance access earth station；1 benefit of unmanned plane
Access is sent with access acknowledgement channel ground station 1 and permits instruction, and the downlink working frequency point and downlink that are sent with earth station 1 expand
The working frequency points and spreading code that frequency code is transmitted as 1 downlink telemetry communication business of unmanned plane；Earth station 1 receives access and permits referring to
Show, uplink working frequency points and the uplink working frequency points transmitted as uplink telemetry communication business of spread spectrum sent using unmanned plane 1 with
Spreading code；Independently pairing process terminates unmanned plane 1, and unmanned plane 2 independently matches process and wait time-out since no earth station accesses
It will terminate automatically.
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