CN105871414B - Frequency-hopping communication method, system and the application antitheft applied to automotive electronics - Google Patents
Frequency-hopping communication method, system and the application antitheft applied to automotive electronics Download PDFInfo
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- CN105871414B CN105871414B CN201610201305.8A CN201610201305A CN105871414B CN 105871414 B CN105871414 B CN 105871414B CN 201610201305 A CN201610201305 A CN 201610201305A CN 105871414 B CN105871414 B CN 105871414B
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- frequency hopping
- frequency
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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
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7156—Arrangements for sequence synchronisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
Abstract
The invention discloses a kind of frequency-hopping communication method, system and the applications antitheft applied to automotive electronics, belong to communication technique field, technical essential is：Frequency-hopping communication method is used between the communication process of car-mounted terminal (base station system) and handheld terminal (Intelligent key), it is not fixed using carrier frequency, frequency hopping collection of illustrative plates diversified mode at random, the purpose of being monitored by malicious interference, malice when preventing burglary-resisting system communication to realize, it is various with method, it is convenient to carry out, reasonable design, the advantages that being widely used.
Description
Technical field
The invention belongs to communication technique field more particularly to a kind of frequency-hopping communication methods antitheft applied to automotive electronics.
Background technology
With the development of the times, vehicle has been essential articles for use during we live；With the universal and skill of vehicle
The progress of art, the automotive theft proof system based on old single carrier wave frequency point use fixed carrier frequency for communication, repeatedly by malice
Interference, communication data are maliciously monitored, and the antitheft purpose of original vehicle cannot be satisfied, therefore are applied to automobile burglar system
The New Anti-interference communication means of system is particularly important.
Invention content
Weak in order to solve automobile electronic anti-burglary system communication anti-interference capability, present invention aims at provide a kind of application
In the antitheft frequency-hopping communication method of automotive electronics, to improve automobile electronic anti-burglary system communication anti-interference capability.
To achieve the goals above, the technical essential of technical solution of the present invention is：
A kind of frequency-hopping communication method antitheft applied to automotive electronics, car-mounted terminal and handheld terminal possess identical basis
Keying sequence and identical multigroup pseudo-random sequence, pseudo-random sequence generate corresponding frequency hopping collection of illustrative plates by fundamental cryptographic sequence,
Car-mounted terminal first passes through frequency hopping collection of illustrative plates when being communicated with handheld terminal synchronous, and effective frequency hopping communications is carried out after synchronizing.
Further, after the communication of certain frequency carrier is often completed in frequency hopping communications, carrier frequency carries out orderly according to frequency hopping collection of illustrative plates
Variation.
Further, the method for collection of illustrative plates synchronization is：S1. car-mounted terminal is according to fundamental cryptographic sequence LiBy puppet with
Machine sequence generates frequency point fi, selection sends the frequency point and transmission communication handshake instructs on the frequency point, is synchronized for frequency hopping collection of illustrative plates.
Further, the method that effective frequency hopping communications is carried out after frequency hopping collection of illustrative plates synchronizes is：
S2：Car-mounted terminal is after sending communication handshake instruction in 3ms, the handshake for receiving handheld terminal transmission,
If the handshake that car-mounted terminal receives handheld terminal transmission is correct, frequency hopping collection of illustrative plates, which synchronizes, to be terminated, logical into normal frequency hopping
Letter process；
S3：If car-mounted terminal receive handheld terminal transmission handshake is wrong or 3ms in car-mounted terminal do not receive
To handheld terminal handshake, judge that frequency hopping collection of illustrative plates Synchronization timeout, car-mounted terminal then reattempt primary above-mentioned frequency hopping collection of illustrative plates and synchronize
Process；
S4：If car-mounted terminal continuously judges frequency hopping collection of illustrative plates Synchronization timeout 2 times under same frequency point, hopping pattern is judged
Synchronization failure is composed, according to fundamental cryptographic sequence Li+1Frequency point f is generated by pseudo-random sequencei+1, repeat step S1 processes；
S5：Car-mounted terminal initiates frequency hopping collection of illustrative plates from first time and synchronizes rear total time time-out 3s, then exits this frequency hopping communications
Process judges communication abnormality；
S6：After normal frequency hopping communication process starts, car-mounted terminal is carried out with handheld terminal using the frequency hopping collection of illustrative plates appointed
Communication.
The invention further relates to a kind of frequency-hopping communication systems antitheft applied to automotive electronics, including car-mounted terminal and hand-held end
End, the car-mounted terminal and handheld terminal possess identical fundamental cryptographic sequence and identical multigroup pseudo-random sequence, pseudorandom
Sequence generates corresponding frequency hopping collection of illustrative plates by fundamental cryptographic sequence, and car-mounted terminal and handheld terminal first pass through frequency hopping collection of illustrative plates when communicating
It is synchronous, carry out effective frequency hopping communications after synchronizing.
Further, after the communication of certain frequency carrier is often completed in frequency hopping communications, carrier frequency is had according to frequency hopping collection of illustrative plates
Sequence changes.
Further, the method for collection of illustrative plates synchronization is：S1. car-mounted terminal is according to fundamental cryptographic sequence LiBy puppet with
Machine sequence generates frequency point fi, selection sends the frequency point and transmission communication handshake instructs on the frequency point, is synchronized for frequency hopping collection of illustrative plates.
Further, the method that effective frequency hopping communications is carried out after frequency hopping collection of illustrative plates synchronizes is：
S2：Car-mounted terminal is after sending communication handshake instruction in 3ms, the handshake for receiving handheld terminal transmission,
If the handshake that car-mounted terminal receives handheld terminal transmission is correct, frequency hopping collection of illustrative plates, which synchronizes, to be terminated, logical into normal frequency hopping
Letter process；
S3：If car-mounted terminal receive handheld terminal transmission handshake is wrong or 3ms in car-mounted terminal do not receive
To handheld terminal handshake, judge that frequency hopping collection of illustrative plates Synchronization timeout, car-mounted terminal then reattempt primary above-mentioned frequency hopping collection of illustrative plates and synchronize
Process；
S4：If car-mounted terminal continuously judges frequency hopping collection of illustrative plates Synchronization timeout 2 times under same frequency point, hopping pattern is judged
Synchronization failure is composed, according to fundamental cryptographic sequence Li+1Frequency point f is generated by pseudo-random sequencei+1, repeat step S1 processes；
S5：Car-mounted terminal initiates frequency hopping collection of illustrative plates from first time and synchronizes rear total time time-out 3s, then exits this frequency hopping communications
Process judges communication abnormality；
S6：After normal frequency hopping communication process starts, car-mounted terminal is carried out with handheld terminal using the frequency hopping collection of illustrative plates appointed
Communication.
A kind of frequency-hopping communication method is in the antitheft application of automotive electronics.
Advantageous effect：The frequency-hopping communication method antitheft applied to automotive electronics, by the fundamental cryptographic that can customize and more
The different pseudo-random sequences of group, which can combine, generates multigroup frequency hopping collection of illustrative plates；And the characteristics of using based on frequency-hopping communication system, pass through
Change communication frequency and then effective information is made to reduce possibility that is disturbed or intercepting and capturing, greatly improves anti-theft effect.Largely
It ensure that Information Security when VATS Vehicle Anti-Theft System communication, the pleasure for making our enjoyment auto Lifes that are safer, trusting bring
Interest.
Description of the drawings
Fig. 1 is the flow chart of the frequency-hopping communication method of the present invention.
Specific implementation mode
Embodiment 1：A kind of frequency-hopping communication method antitheft applied to automotive electronics, car-mounted terminal and handheld terminal possess phase
Same fundamental cryptographic sequence and identical multigroup pseudo-random sequence, pseudo-random sequence pass through fundamental cryptographic sequence and generate corresponding jump
Frequency collection of illustrative plates, fundamental cryptographic sequence generate corresponding frequency hopping collection of illustrative plates by one group of pseudo-random sequence, use different pseudo-random sequences
Different frequency hopping collection of illustrative plates is generated, realizes that frequency hopping collection of illustrative plates diversification, car-mounted terminal and handheld terminal first pass through frequency hopping collection of illustrative plates when communicating
It is synchronous, carry out effective frequency hopping communications after synchronizing.
In the present embodiment, the fundamental cryptographic in fundamental cryptographic sequence does not participate in data communication directly, and can dispatch from the factory solidification.
Preferably, often completed in frequency hopping communications certain frequency carrier communication after, carrier frequency according to frequency hopping collection of illustrative plates into
Row orderly variation, accordingly even when currently transmitted data are trapped or interfere, still not under the influence of the moment communication, and then ensure that
The safety of vehicle.
Embodiment 2：It is identical as each technical solution in embodiment 1, more specifically：The method that the collection of illustrative plates synchronizes
It is：
S1. car-mounted terminal is according to fundamental cryptographic sequence LiFrequency point f is generated by pseudo-random sequencei, select to send the frequency point simultaneously
Communication handshake instruction is sent on the frequency point, is synchronized for frequency hopping collection of illustrative plates.
Embodiment 3：It is identical as each technical solution in embodiment 1 or 2, more specifically：Frequency hopping collection of illustrative plates carries out after synchronizing
The method of effective frequency hopping communications is：
S2：Car-mounted terminal is after sending communication handshake instruction in 3ms, the handshake for receiving handheld terminal transmission
(ACK), if car-mounted terminal receives the handshake (ACK) of handheld terminal transmission correctly, show car-mounted terminal and hold
This moment of terminal is in identical frequency point and normal in the enterprising row data communication of the frequency point, and frequency hopping collection of illustrative plates, which synchronizes, to be terminated, into just
Normal frequency hopping communications process, is shown in S6；
S3：If car-mounted terminal receive handheld terminal transmission handshake (ACK) is wrong or 3ms in car-mounted terminal not
Handheld terminal handshake (ACK) is received, then shows that car-mounted terminal and handheld terminal this moment hopping pattern spectrum are different, i.e. frequency
Synchronization failure then judges that frequency hopping collection of illustrative plates Synchronization timeout, car-mounted terminal then reattempt primary above-mentioned frequency hopping collection of illustrative plates synchronizing process at this time,
That is S1 processes；
S4：If car-mounted terminal continuously judges frequency hopping collection of illustrative plates Synchronization timeout 2 times under same frequency point, hopping pattern is judged
Synchronization failure is composed, according to fundamental cryptographic sequence Li+1Frequency point f is generated by pseudo-random sequencei+1, repeat step S1 processes；
S5：Car-mounted terminal initiates frequency hopping collection of illustrative plates from first time and synchronizes rear total time time-out 3s, then exits this frequency hopping communications
Process judges communication abnormality；
S6：After normal frequency hopping communication process starts, car-mounted terminal is carried out with handheld terminal using the frequency hopping collection of illustrative plates appointed
Communication.
Embodiment 4：A kind of frequency-hopping communication system antitheft applied to automotive electronics, including car-mounted terminal and handheld terminal,
The car-mounted terminal and handheld terminal possess identical fundamental cryptographic sequence and identical multigroup pseudo-random sequence, pseudo-random sequence
Corresponding frequency hopping collection of illustrative plates is generated by fundamental cryptographic sequence, fundamental cryptographic sequence generates corresponding jump by one group of pseudo-random sequence
Frequency collection of illustrative plates, different frequency hopping collection of illustrative plates is generated using different pseudo-random sequences, and car-mounted terminal and handheld terminal first pass through when communicating
Frequency hopping collection of illustrative plates synchronizes, and effective frequency hopping communications is carried out after synchronizing.
Preferable scheme is that：Often completed in frequency hopping communications certain frequency carrier communication after, carrier frequency according to frequency hopping collection of illustrative plates into
Row orderly variation, accordingly even when currently transmitted data are trapped or interfere, still not under the influence of the moment communication, and then ensure that
The safety of vehicle.
System described in the present embodiment can be used for executing the method scheme described in embodiment 1 or 2 or 3.Embodiment 5:
With 4 identical technical solution of embodiment, more specifically：The method that the collection of illustrative plates synchronizes is：
S1. car-mounted terminal is according to fundamental cryptographic sequence LiFrequency point f is generated by pseudo-random sequencei, select to send the frequency point simultaneously
Communication handshake instruction is sent on the frequency point, is synchronized for frequency hopping collection of illustrative plates.
The frequency hopping collection of illustrative plates carries out effective frequency hopping communications method after synchronizing is：
S2：Car-mounted terminal is after sending communication handshake instruction in 3ms, the handshake for receiving handheld terminal transmission
(ACK), if car-mounted terminal receives the handshake (ACK) of handheld terminal transmission correctly, show car-mounted terminal and hold
This moment of terminal is in identical frequency point and normal in the enterprising row data communication of the frequency point, and frequency hopping collection of illustrative plates, which synchronizes, to be terminated, into just
Normal frequency hopping communications process, is shown in S6；
S3：If car-mounted terminal receive handheld terminal transmission handshake (ACK) is wrong or 3ms in car-mounted terminal not
Handheld terminal handshake (ACK) is received, then shows that car-mounted terminal and handheld terminal this moment hopping pattern spectrum are different, i.e. frequency
Synchronization failure then judges that frequency hopping collection of illustrative plates Synchronization timeout, car-mounted terminal then reattempt primary above-mentioned frequency hopping collection of illustrative plates synchronizing process at this time,
That is S1 processes；
S4：If car-mounted terminal continuously judges frequency hopping collection of illustrative plates Synchronization timeout 2 times under same frequency point, hopping pattern is judged
Synchronization failure is composed, according to fundamental cryptographic sequence Li+1Frequency point f is generated by pseudo-random sequencei+1, repeat step S1 processes；
S5：Car-mounted terminal initiates frequency hopping collection of illustrative plates from first time and synchronizes rear total time time-out 3s, then exits this frequency hopping communications
Process judges communication abnormality；
S6：After normal frequency hopping communication process starts, car-mounted terminal is carried out with handheld terminal using the frequency hopping collection of illustrative plates appointed
Communication.
System described in the present embodiment can be used for executing the method scheme described in embodiment 1 or 2 or 3.
Embodiment 6：A kind of frequency-hopping communication method is in the antitheft application of automotive electronics, concrete application scheme such as embodiment 1-5
Shown in each scheme of kind.
Embodiment 7：A kind of frequency-hopping communication method antitheft applied to automotive electronics, passes through car-mounted terminal (base station system)
And handheld terminal (key) two parts composition communicated with,
1. car-mounted terminal and handheld terminal are owned by identical fundamental cryptographic sequence and identical multigroup pseudo-random sequence.
2. corresponding frequency hopping collection of illustrative plates can be generated by specific one group of pseudo-random sequence by fundamental cryptographic sequence, use
Different pseudo-random sequences can generate different frequency hopping collection of illustrative plates, realize frequency hopping collection of illustrative plates diversification.
3. the fundamental cryptographic in fundamental cryptographic sequence does not participate in data communication directly, can dispatch from the factory solidification.
Synchronous by frequency hopping collection of illustrative plates first when 4. car-mounted terminal is communicated with handheld terminal, completion is effectively jumped after synchronizing
Frequency communicates.
5. after often completing the communication of certain frequency carrier in frequency hopping communications, carrier frequency progress is orderly become according to frequency hopping collection of illustrative plates
Change, accordingly even when currently transmitted data are trapped or interfere, still not under the influence of the moment communication, and then ensure that the peace of vehicle
Entirely.
In order to solve the problems such as previous automobile electronic anti-burglary system communication anti-interference capability is poor, present embodiment provides one
Kind frequency-hopping communication method, the communication means can be generally used for point-to-point communication, such as：Car-mounted terminal (base station system) and hand-held
The communications such as terminal (Intelligent key)；
Car-mounted terminal (base station system) and handheld terminal (Intelligent key) are owned by identical fundamental cryptographic sequence and identical
Pseudo-random sequence, pseudo-random sequence can generate corresponding frequency hopping collection of illustrative plates by fundamental cryptographic sequence --- T/F square
Battle array；Car-mounted terminal (base station system) and handheld terminal (Intelligent key) are after proprietary frequency hopping collection of illustrative plates synchronous method synchronizes
Normal frequency hopping communications can be carried out, referring to Fig. 1, specific rate-determining steps are as follows：
S1：Car-mounted terminal is according to fundamental cryptographic sequence LiFrequency point f is generated by pseudo-random sequencei, selection send frequency point and
Communication handshake instruction is sent on the frequency point, is synchronized for frequency hopping collection of illustrative plates.
S2：Handshake (ACK) of the car-mounted terminal after sending above-metioned instruction in 3ms for receiving handheld terminal.If
Car-mounted terminal receives the handshake (ACK) of handheld terminal transmission correctly, then shows car-mounted terminal and this moment of handheld terminal
In identical frequency point and normal in the enterprising row data communication of the frequency point, frequency hopping collection of illustrative plates, which synchronizes, to be terminated, into normal frequency hopping communications
Process is shown in S6.
S3：If car-mounted terminal receive handheld terminal transmission handshake (ACK) is wrong or 3ms in car-mounted terminal not
Handheld terminal handshake (ACK) is received, then shows that car-mounted terminal and handheld terminal this moment hopping pattern spectrum are different, i.e. frequency
Synchronization failure then judges frequency hopping collection of illustrative plates Synchronization timeout at this time；Car-mounted terminal then reattempts primary above-mentioned frequency hopping collection of illustrative plates synchronizing process,
That is S1 processes.
S4：If car-mounted terminal continuously judges frequency hopping collection of illustrative plates Synchronization timeout 2 times under same frequency point, hopping pattern is judged
Synchronization failure is composed, then according to fundamental cryptographic sequence Li+1Frequency point f is generated by pseudo-random sequencei+1, repeat S1 processes；
S5：Car-mounted terminal initiates frequency hopping collection of illustrative plates from first time and synchronizes rear total time time-out 3s, then exits this frequency hopping communications
Process judges communication abnormality.
S6：After normal frequency hopping communication process starts, car-mounted terminal is carried out with handheld terminal using the frequency hopping collection of illustrative plates appointed
Communication.
Present embodiment discloses a kind of frequency-hopping communication methods antitheft applied to automotive electronics, in car-mounted terminal (base station system
System) and handheld terminal (Intelligent key) between communication process use frequency-hopping communication method, i.e., be not fixed using carrier frequency, frequency hopping
Diversified mode has side to collection of illustrative plates the purpose of monitoring by malicious interference, malice when preventing burglary-resisting system communication to realize at random
Method is various, convenient to carry out, reasonable design, the advantages that being widely used.
The preferable specific implementation mode of the above, only the invention, but the protection domain of the invention is not
It is confined to this, any one skilled in the art is in the technical scope that the invention discloses, according to the present invention
The technical solution of creation and its inventive concept are subject to equivalent substitution or change, should all cover the invention protection domain it
It is interior.
Claims (4)
1. a kind of frequency-hopping communication method antitheft applied to automotive electronics, which is characterized in that car-mounted terminal and handheld terminal possess
Identical fundamental cryptographic sequence and identical multigroup pseudo-random sequence, pseudo-random sequence are generated corresponding by fundamental cryptographic sequence
Frequency hopping collection of illustrative plates, car-mounted terminal and handheld terminal first pass through frequency hopping collection of illustrative plates when communicating synchronous, and effective frequency hopping communications is carried out after synchronizing；Institute
The method that the collection of illustrative plates stated synchronizes is：
S1. car-mounted terminal is according to fundamental cryptographic sequence LιFrequency point f is generated by pseudo-random sequenceι, select to send the frequency point and at this
Communication handshake instruction is sent on frequency point, is synchronized for frequency hopping collection of illustrative plates；Frequency hopping collection of illustrative plates carries out effective frequency hopping communications method after synchronizing
It is：
S2：Car-mounted terminal is after sending communication handshake instruction in 3ms, the handshake for receiving handheld terminal transmission, if
The handshake that car-mounted terminal receives handheld terminal transmission is correct, and frequency hopping collection of illustrative plates, which synchronizes, to be terminated, into normal frequency hopping communications mistake
Journey；
S3：If car-mounted terminal receive handheld terminal transmission handshake is wrong or 3ms in car-mounted terminal do not receive it is in one's hands
Terminal handshake is held, judges that frequency hopping collection of illustrative plates Synchronization timeout, car-mounted terminal then reattempt primary above-mentioned frequency hopping collection of illustrative plates synchronizing process；
S4：If car-mounted terminal continuously judges frequency hopping collection of illustrative plates Synchronization timeout 2 times under same frequency point, judge that frequency hopping collection of illustrative plates is same
Step failure, according to fundamental cryptographic sequence Lι+1Frequency point f is generated by pseudo-random sequenceι+1, repeat step S1 processes；
S5：Car-mounted terminal initiates frequency hopping collection of illustrative plates from first time and synchronizes rear total time time-out 3s, then exits this frequency hopping communications process,
Judge communication abnormality；
S6：After normal frequency hopping communication process starts, car-mounted terminal is communicated with handheld terminal using the frequency hopping collection of illustrative plates appointed.
2. the frequency-hopping communication method antitheft applied to automotive electronics as described in claim 1, which is characterized in that in frequency hopping communications
After often completing the communication of certain frequency carrier, carrier frequency is orderly changed according to frequency hopping collection of illustrative plates.
3. a kind of applied to the antitheft frequency-hopping communication system of automotive electronics, which is characterized in that including car-mounted terminal and handheld terminal,
The car-mounted terminal and handheld terminal possess identical fundamental cryptographic sequence and identical multigroup pseudo-random sequence, pseudo-random sequence
Corresponding frequency hopping collection of illustrative plates is generated by fundamental cryptographic sequence, it is same that car-mounted terminal and handheld terminal first pass through frequency hopping collection of illustrative plates when communicating
Step, effective frequency hopping communications is carried out after synchronizing；The method that the collection of illustrative plates synchronizes is：
S1. car-mounted terminal is according to fundamental cryptographic sequence LιFrequency point f is generated by pseudo-random sequenceι, select to send the frequency point and at this
Communication handshake instruction is sent on frequency point, is synchronized for frequency hopping collection of illustrative plates；Frequency hopping collection of illustrative plates carries out effective frequency hopping communications method after synchronizing
It is：
S2：Car-mounted terminal is after sending communication handshake instruction in 3ms, the handshake for receiving handheld terminal transmission, if
The handshake that car-mounted terminal receives handheld terminal transmission is correct, and frequency hopping collection of illustrative plates, which synchronizes, to be terminated, into normal frequency hopping communications mistake
Journey；
S3：If car-mounted terminal receive handheld terminal transmission handshake is wrong or 3ms in car-mounted terminal do not receive it is in one's hands
Terminal handshake is held, judges that frequency hopping collection of illustrative plates Synchronization timeout, car-mounted terminal then reattempt primary above-mentioned frequency hopping collection of illustrative plates synchronizing process；
S4：If car-mounted terminal continuously judges frequency hopping collection of illustrative plates Synchronization timeout 2 times under same frequency point, judge that frequency hopping collection of illustrative plates is same
Step failure, according to fundamental cryptographic sequence Lι+1Frequency point f is generated by pseudo-random sequenceι+1, repeat step S1 processes；
S5：Car-mounted terminal initiates frequency hopping collection of illustrative plates from first time and synchronizes rear total time time-out 3s, then exits this frequency hopping communications process,
Judge communication abnormality；
S6：After normal frequency hopping communication process starts, car-mounted terminal is communicated with handheld terminal using the frequency hopping collection of illustrative plates appointed.
4. the frequency-hopping communication system antitheft applied to automotive electronics as claimed in claim 3, which is characterized in that in frequency hopping communications
After often completing the communication of certain frequency carrier, carrier frequency is orderly changed according to frequency hopping collection of illustrative plates.
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| CN106790065A (en) * | 2016-12-20 | 2017-05-31 | 成都川维科技有限公司 | A kind of safe watch wireless data transmission method and transmitting device |
| CN107689097B (en) * | 2017-08-29 | 2018-08-07 | 重庆壹元电科技有限公司 | Synchronizing Passwords based on frequency hopping generate and verify system and its application |
| CN109584406B (en) * | 2017-09-28 | 2020-12-25 | 比亚迪股份有限公司 | Vehicle and vehicle key communication control method and device and vehicle |
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