CN111222602B - Method and system for carrying out secure communication with vehicle-mounted unit - Google Patents
Method and system for carrying out secure communication with vehicle-mounted unit Download PDFInfo
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- CN111222602B CN111222602B CN201911406334.8A CN201911406334A CN111222602B CN 111222602 B CN111222602 B CN 111222602B CN 201911406334 A CN201911406334 A CN 201911406334A CN 111222602 B CN111222602 B CN 111222602B
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- electronic tag
- response message
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/0772—Physical layout of the record carrier
- G06K19/07726—Physical layout of the record carrier the record comprising means for indicating first use, e.g. a frangible layer
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07758—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
- G06K19/0776—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag the adhering arrangement being a layer of adhesive, so that the record carrier can function as a sticker
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
- G07B15/06—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems
- G07B15/063—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems using wireless information transmission between the vehicle and a fixed station
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Finance (AREA)
- Devices For Checking Fares Or Tickets At Control Points (AREA)
Abstract
The invention discloses a method and a system for carrying out safety communication with an on-board unit, wherein the on-board unit and a fragile electronic tag are stuck at a preset position of a vehicle, and the system comprises the following components: a receiving device for causing the vehicle-mounted unit in the dormant state to receive a signal of a first communication protocol from the road side unit; the conversion device analyzes the signal of the first communication protocol to acquire an interaction message from the road side unit; the generating device adds a failure time field in a first response message which is ready to be sent to the drive test unit through the first radio frequency module; and the sending device is used for sending a signal of a second communication protocol to the fragile electronic tag so as to enable the fragile electronic tag to generate a second response message based on the signal of the second communication protocol. The invention fully utilizes the existing radio frequency module of the vehicle-mounted unit and the antenna unit thereof, and the fragile electronic tag is a passive tag, and has extremely low cost.
Description
Technical Field
The invention belongs to the technical field of vehicle-mounted units, and particularly relates to a method and a system for carrying out safety communication with a vehicle-mounted unit and an OBU anti-disassembly device.
Background
The highway toll collection system (Electronic Toll Collection, ETC for short) is an intelligent traffic electronic system which takes modern communication technology, electronic technology, automatic control technology, computer, network technology and the like as the main guide and realizes automatic toll collection of vehicles without stopping. The system automatically completes the charging process without the need for driver parking and other toll collector operations through special short-range communication between a Road Side Unit (RSU) and an on-board unit (OBU) of the high-speed toll station. ETC systems can greatly improve efficiency.
Conventional OBU (On board Unit), as shown in fig. 2, includes: a 5.8GHz radio frequency module and an antenna unit thereof, a 13.56MHz radio frequency module and an antenna unit thereof, a MCU (Microcontroller Unit) unit, an anti-disassembly switch and double-sided film unit, a power system unit, a ESAM (Embedded Secure Access Module) encryption chip unit, a man-machine interaction unit and other units. The 5.8GHz radio frequency module and the antenna unit thereof realize remote communication with the portal frame RSU (Road Side Uni), the 13.56MHz radio frequency module and the antenna unit thereof realize communication with a user bank card to realize fee deduction function, and the MCU unit realizes control of the whole machine. The anti-disassembly switch represents that the OBU works normally after the anti-disassembly key is pressed down, and represents that the OBU is disassembled after the anti-disassembly key is popped up, so that the OBU fails.
The OBU shell passes through the double-sided film and links to each other with front windshield, prevents tearing open the switch and adopts mechanical structure more, when OBU and car windshield phase separation, prevents tearing open to close and pops up, arouses the change of high low level, and at this moment, prevents tearing open to close the MCU input/output port that links to each other, discerns the change of high low level to judge and read out, OBU is demolishd.
However, the method is easy to break, and the OBU can be removed as long as the anti-disassembly closing state of the OBU is ensured not to change. In reality, the phenomenon that the OBU is illegally dismantled often occurs, and the blade is used for supporting the anti-dismantling switch, so that the switch does not bounce, the OBU is taken down together with the film, the state of the OBU for preventing the dismantling is not changed, the OBU cannot identify the OBU, and the OBU is dismantled, so that the OBU is illegally dismantled.
Disclosure of Invention
Aiming at the defects in the prior art, the embodiment of the invention provides an OBU anti-disassembly device, which can effectively solve the problem of illegal disassembly of the prior OBU.
In view of the above technical problems, an embodiment of the present invention provides a method for securely communicating with an on-board unit, the on-board unit being attached together with a fragile electronic tag at a predetermined position of a vehicle, the method comprising:
when a vehicle equipped with the on-board unit moves within a predetermined area range centered on a roadside unit, the on-board unit in a sleep state receives a signal of a first communication protocol from the roadside unit;
based on the signal of the first communication protocol, the vehicle-mounted unit is converted from a dormant state to an awake state, and the signal of the first communication protocol is analyzed to obtain an interaction message from a road side unit;
generating a first response message corresponding to the interaction message based on the interaction message, and sending the first response message to a drive test unit through a first radio frequency module, wherein a dead time field is added in the first response message, and the dead time field is used for indicating the dead time of the first response message under the condition that no additional acknowledgement message is received;
transmitting a signal of a second communication protocol to the fragile electronic tag to cause the fragile electronic tag to generate a second response message based on the signal of the second communication protocol;
and when a second response message is not received from the fragile electronic tag within a preset time, not sending an additional confirmation message to the road side unit so that the first response message is in a failure state.
The predetermined time is less than the failure time.
The predetermined position is an upper side of a front windshield of the vehicle.
The first communication protocol is different from the second communication protocol and the interactive message comprises an identifier of the roadside unit, location information and an indication to start charging.
The method further comprises the steps of:
setting the expiration time, and updating the expiration time field according to the set expiration time;
judging the state of the first response message according to the failure time field;
when the first response message is in an effective state, the vehicle-mounted unit and the road side unit are in data communication;
and when the first response message is in a failure state, the vehicle-mounted unit does not carry out data communication with the road side unit.
The vehicle-mounted unit comprises a vehicle-mounted unit body, wherein the first surface of the vehicle-mounted unit body and the first surface of the fragile electronic tag are adhered through a first adhesive medium, and the second surface of the fragile electronic tag is adhered to a preset position of a vehicle through a second adhesive medium.
The sending the signal of the second communication protocol to the fragile electronic tag comprises: and the vehicle-mounted unit sends a signal of a second communication protocol to the fragile electronic tag through a second radio frequency module.
Wherein the frangible electronic tag comprises: an electronic tag chip, a fragile substrate and an electronic tag antenna; the electronic tag antenna is printed on the first surface of the fragile substrate, and the electronic tag chip is positioned on the first surface of the fragile substrate.
The electronic tag antenna has a coupling degree with an antenna of the vehicle-mounted unit.
And the equivalent circuit resonant frequency formed by the electronic tag chip and the electronic tag antenna is respectively the same as the frequency of the second radio frequency module and the antenna unit of the vehicle-mounted unit.
According to still another aspect of the present invention, there is provided a system for secure communication with an on-board unit attached together with a fragile electronic tag at a predetermined location of a vehicle, characterized by comprising:
a receiving device that causes the in-vehicle unit in a sleep state to receive a signal of a first communication protocol from the roadside unit when a vehicle equipped with the in-vehicle unit moves within a predetermined area range centered on the roadside unit;
the conversion device is used for promoting the vehicle-mounted unit to be converted from a dormant state to an awake state based on the signal of the first communication protocol, and analyzing the signal of the first communication protocol to acquire an interaction message from a road side unit;
generating a first response message corresponding to the interaction message based on the interaction message, and sending the first response message to a drive test unit through a first radio frequency module, wherein a dead time field is added in the first response message, and the dead time field is used for indicating the dead time of the first response message under the condition that no additional acknowledgement message is received;
a transmitting device for transmitting a signal of a second communication protocol to the fragile electronic tag so as to cause the fragile electronic tag to generate a second response message based on the signal of the second communication protocol; and when a second response message is not received from the fragile electronic tag within a preset time, not sending an additional confirmation message to the road side unit so that the first response message is in a failure state.
The predetermined time is less than the failure time.
The predetermined position is an upper side of a front windshield of the vehicle.
The first communication protocol is different from the second communication protocol and the interactive message comprises an identifier of the roadside unit, location information and an indication to start charging.
The system further comprises:
the setting device is used for setting the failure time and updating the failure time field according to the set failure time;
the judging device judges the state of the first response message according to the failure time field;
when the first response message is in an effective state, the vehicle-mounted unit and the road side unit are in data communication; and when the first response message is in a failure state, the vehicle-mounted unit does not carry out data communication with the road side unit.
The vehicle-mounted unit comprises a vehicle-mounted unit body, wherein the first surface of the vehicle-mounted unit body and the first surface of the fragile electronic tag are adhered through a first adhesive medium, and the second surface of the fragile electronic tag is adhered to a preset position of a vehicle through a second adhesive medium.
The sending the signal of the second communication protocol to the fragile electronic tag comprises: and the vehicle-mounted unit sends a signal of a second communication protocol to the fragile electronic tag through a second radio frequency module.
Wherein the frangible electronic tag comprises: an electronic tag chip, a fragile substrate and an electronic tag antenna; the electronic tag antenna is printed on the first surface of the fragile substrate, and the electronic tag chip is positioned on the first surface of the fragile substrate.
The electronic tag antenna has a coupling degree with an antenna of the vehicle-mounted unit.
And the equivalent circuit resonant frequency formed by the electronic tag chip and the electronic tag antenna is respectively the same as the frequency of the second radio frequency module and the antenna unit of the vehicle-mounted unit.
In addition, the invention also provides an OBU anti-disassembly device, which comprises an OBU body and a fragile electronic tag, wherein the first surface of the OBU body is adhered to the first surface of the fragile electronic tag through a first adhesive medium, and the second surface of the fragile electronic tag is adhered to a vehicle part through a second adhesive medium.
According to one embodiment of the invention, the OBU comprises a first radio frequency module and its antenna unit, a second radio frequency module and its antenna unit. The first radio frequency module is used for communicating with the road side unit. The second radio frequency module is configured to read the fragile electronic tag information, associate the fragile electronic tag information with the OBU information, and radio frequency modules (e.g., a first radio frequency module and a second radio frequency module) with different frequencies correspond to different antennas of the OBU antenna unit.
According to one embodiment of the invention, the frangible electronic tag comprises: an electronic tag chip, a fragile substrate and an electronic tag antenna; the electronic tag antenna is printed on the first surface of the fragile substrate, and the electronic tag chip is located on the first surface of the fragile substrate.
According to one embodiment of the invention, the antenna of the OBU antenna unit, the frequency of which is the same as the electronic tag antenna, has a degree of coupling.
According to an embodiment of the present invention, an equivalent circuit resonance frequency formed by the electronic tag chip and the electronic tag antenna is the same as the frequency of the corresponding second radio frequency module and the antenna unit thereof.
According to one embodiment of the invention, the OBU body has a function of being woken up by the drive test unit.
A second aspect of the present invention discloses a method for secure communication with an on-board unit that is attached together with a fragile electronic tag at a predetermined location of a vehicle, the method comprising:
when a vehicle equipped with the on-board unit moves within a predetermined area range centered on a roadside unit, the on-board unit in a sleep state receives a signal of a first communication protocol from the roadside unit.
Based on the signal of the first communication protocol, the vehicle-mounted unit is converted from a dormant state to an awake state, and the signal of the first communication protocol is analyzed to obtain an interaction message from the road side unit.
Generating a first response message corresponding to the interaction message based on the interaction message, and adding a dead time field in the first response message, wherein the dead time field is used for indicating the dead time of the first response message in the condition that no additional acknowledgement message is received.
And sending a signal of a second communication protocol to the fragile electronic tag to cause the fragile electronic tag to generate a second response message based on the signal of the second communication protocol.
And when a second response message is not received from the fragile electronic tag within a preset time, not sending an additional confirmation message to the road side unit so that the first response message is in a failure state.
According to one embodiment of the invention, the predetermined time is not less than the failure time.
According to one embodiment of the invention, the first response message has a dead time of zero in case an additional acknowledgement message is received.
According to one embodiment of the invention, the method further comprises: and updating the expiration time field according to the expiration time.
And judging the state of the first response message according to the failure time field.
And when the first response message is in a valid state, the vehicle-mounted unit is in data communication with the fragile electronic tag.
When the first response message is in a failure state, the vehicle-mounted unit is not in communication with the fragile unit
And the electronic tag performs data communication, feeds back the failure state of the first response message to the road side unit through a first communication protocol, and judges that the vehicle-mounted unit is illegally dismantled.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of an OBU anti-disassembly apparatus disclosed in an embodiment of the invention;
FIG. 2 is a schematic diagram of a conventional OBU disclosed in an embodiment of the present invention;
FIG. 3 is a block diagram of an OBU disassembly prevention system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a fragile electronic tag according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for binding an OBU with a fragile electronic tag before shipment from a factory according to an embodiment of the present invention;
FIG. 6 is a flow chart of an OBU tamper evident method in accordance with an embodiment of the present invention;
FIG. 7 is a flow chart of a method for secure communication with an on-board unit disclosed in an embodiment of the invention;
fig. 8 is a schematic diagram of a system for secure communication with an on-board unit according to an embodiment of the present invention.
Description of the figures: 1-OBU body; 2-a fragile electronic tag; 2.1-a first surface of a fragile electronic tag; 2.2-a second surface of the frangible electronic tag; 2.3-electronic tag chip; 2.4-a frangible substrate; 2.5-electronic tag antenna; 3.1-a first adhesive medium; 3.2-a second adhesive medium; 4-vehicle parts.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the embodiments of the present disclosure.
The embodiment of the invention provides an OBU anti-disassembly device, which can effectively solve the problem of illegal disassembly of the prior OBU. The OBU anti-disassembly device comprises an OBU body and a fragile electronic tag, wherein the first surface of the OBU body is adhered to the first surface of the fragile electronic tag through a first adhesive medium, and the second surface of the fragile electronic tag is adhered to a vehicle part through a second adhesive medium.
According to one embodiment of the invention, the OBU comprises a second radio frequency module and its antenna unit, which complies with the ISO/IEC14443A protocol or with other protocols such as the ISO/IEC14443-B protocol, the ISO/IEC15693 protocol, etc.
According to one embodiment of the invention, the fragile electronic tag complies with the ISO/IEC14443A protocol or other protocols such as the ISO/IEC14443-B protocol, the ISO/IEC15693 protocol, or the like.
According to one embodiment of the invention, the frangible electronic tag comprises: an electronic tag chip, a fragile substrate and an electronic tag antenna; the electronic tag antenna is printed on the first surface of the fragile substrate, and the electronic tag chip is located on the first surface of the fragile substrate.
According to an embodiment of the present invention, the second radio frequency module of the OBU and the antenna unit thereof are configured to read the fragile electronic tag information, and associate the fragile electronic tag information with the OBU information.
According to one embodiment of the invention, the OBU body has a function of being woken up by the drive test unit.
A second aspect of the present invention discloses a method for secure communication with an on-board unit that is attached together with a fragile electronic tag at a predetermined location of a vehicle, the method comprising:
when a vehicle equipped with the on-board unit moves within a predetermined area range centered on a roadside unit, the on-board unit in a sleep state receives a signal of a first communication protocol from the roadside unit.
Based on the signal of the first communication protocol, the vehicle-mounted unit is converted from a dormant state to an awake state, and the signal of the first communication protocol is analyzed to obtain an interaction message from the road side unit.
Generating a first response message corresponding to the interaction message based on the interaction message, and adding a dead time field in the first response message, wherein the dead time field is used for indicating the dead time of the first response message in the condition that no additional acknowledgement message is received.
And sending a signal of a second communication protocol to the fragile electronic tag to cause the fragile electronic tag to generate a second response message based on the signal of the second communication protocol.
And when a second response message is not received from the fragile electronic tag within a preset time, not sending an additional confirmation message to the road side unit so that the first response message is in a failure state.
According to one embodiment of the invention, the predetermined time is not less than the failure time.
According to one embodiment of the invention, the first response message has a dead time of zero in case an additional acknowledgement message is received.
According to one embodiment of the invention, the method further comprises: and updating the expiration time field according to the expiration time.
And judging the state of the first response message according to the failure time field.
And when the first response message is in a valid state, the vehicle-mounted unit is in data communication with the fragile electronic tag.
When the first response message is in a failure state, the vehicle-mounted unit does not perform data communication with the fragile electronic tag, the failure state of the first response message is fed back to the road side unit through a first communication protocol, and the vehicle-mounted unit is judged to be illegally removed.
Specifically, a 13.56MHz RFID (Radio Frequency Identif ication) fragile electronic tag is adopted and stuck on the back of an OBU shell, and the OBU and the 13.56MHz RFID fragile electronic tag are stuck on a front windshield together. The 13.56MHz (second) radio frequency module in the OBU and the antenna unit thereof can be in wireless communication with the 13.56MHz RFID fragile electronic tag, and the information of the 13.56MHz RFID fragile electronic tag is read. After the OBU is awakened, the OBU13.56MHz radio frequency module and the antenna unit thereof firstly read the 13.56MHz RFID fragile electronic tag. When the OBU confirms that the information of the 13.56MHz RFID fragile electronic tag is correct, the OBU is normal, and the OBU belongs to legal OBU and can carry out transaction fee deduction. Once the OBU is illegally dismantled, the 13.56MHz RFID fragile electronic tag is destroyed, the 13.56MHz RFID module and the antenna unit thereof cannot read the information of the 13.56MHz RFID fragile electronic tag, and the OBU judges that the OBU is illegally dismantled and automatically stops working or reports the information to RSU (R oad Side Unit), thereby playing the anti-dismantling function.
The invention adopts a 13.56MHz RFID fragile electronic tag which is stuck on the back of an OBU shell to combine a new system, as shown in figure 3. The OBU is attached to the front windshield along with a 13.56MHz RFID frangible electronic tag as shown in fig. 1. The 13.56MHz RFID fragile electronic tag follows a protocol, and is the same as a 13.56MHz radio frequency module and an antenna unit thereof on an OBU, namely: are all ISO/IEC14443A protocols. Therefore, the 13.56MHz radio frequency module in the OBU and the antenna unit thereof can perform wireless communication with the 13.56MHz RFID fragile electronic tag, and read the information of the 13.56MHz RFID fragile electronic tag, as shown in figure 3. In order to save battery consumption, the OBU is always in a dormant state, when a motor vehicle with the mounted OBU runs to a high-speed ETC lane, the OBU is awakened by an RSU signal, and after the OBU is awakened, the OBU13.56MHz radio frequency module and an antenna unit thereof are in wireless communication with the 13.56MHz RFID fragile electronic tag to read the information of the 13.56MHz RFID fragile electronic tag. When the OBU confirms that the information of the 13.56MHz RFID fragile electronic tag is correct, the OBU is normal, and the OBU can normally carry out transaction fee deduction. When the OBU is illegally dismantled, the 13.56MHz RFID fragile electronic tag is damaged, at the moment, the OBU cannot read the information of the 13.56MHz RFID fragile electronic tag, and the OBU judges that the OBU is illegally dismantled and automatically stops working or reports the information to the RSU to play a role in preventing disassembly.
The 13.56MHz RFID fragile electronic tag is shown in FIG. 4, and mainly comprises: the electronic tag chip, the fragile substrate and the 13.56MHz antenna can be printed on the fragile substrate in a conductive silver paste mode. The 13.56MHz RFID fragile electronic tag preferably conforms to the ISO/IEC14443A protocol and performs wireless communication with the OBU13.56MHz radio frequency module and an antenna unit thereof. 13.56MHz RFID belongs to near field communication, and the working distance is <10cm. The 13.56MHz RFID fragile electronic tag belongs to a passive electronic tag, does not need a battery, and provides energy, so that when the RFID fragile electronic tag is communicated with an OBU, the energy is absorbed from the OBU13.56MHz radio frequency module and an antenna unit thereof, and the standby power consumption of the OBU is not increased.
When the OBU is dismantled, the fragile electronic tag of 13.56MHz RFID is cracked or broken even if a blade is used, the fragile electronic tag antenna 4-3 of 13.56MHz is broken, or the electronic tag chip 4-2 is separated, so that the fragile electronic tag of 13.56MHz RFID can not work, and a 13.46MHz radio frequency module and an antenna unit thereof on the OBU can not read the information of the fragile electronic tag of 13.56MHz RFID, which represents that the OBU is illegally dismantled. Playing the role of preventing disassembly.
The invention implements a new anti-dismantling method, and can effectively solve the problem of illegal dismantling of the prior OBU. Meanwhile, the existing 13.56MHz radio frequency module of the OBU and an antenna unit thereof are fully utilized, and the 13.56MHz RFID fragile electronic tag is a passive tag and has extremely low cost. No extra standby power consumption is caused to the OBU and the cost is increased.
The radio frequency module and the antenna unit thereof are not limited to 13.56MHz, and meanwhile, the fragile electronic tag is not limited to a frequency band of 13.56MHz, and the fragile RFID electronic tag can achieve the fragile anti-counterfeiting effect by adopting the modes of scratches, cuts and the like on a flexible substrate.
Before leaving the factory in the OBU production processing stage, 13.56MHzRFID fragile electronic tags can be stuck on the OBU, and information is mutually bound. As shown in fig. 5.
The 13.56MHz RFID fragile electronic tag is attached to the mounting location on the back of the OBU housing, and when in use, the OBU is attached to the front windshield of the automobile, as shown in FIG. 1.
A 13.56mhz rfid frangible electronic tag of 30x30 cm size is employed, as shown in fig. 4, and comprises: the electronic tag chip accords with an ISO/IEC14443-A protocol; a fragile substrate, an antenna of 13.56MHz, wherein the 13.56MHz antenna is printed on the fragile substrate in the form of a conductive silver paste.
And the equivalent circuit resonant frequency formed by the electronic tag chip and the electronic tag antenna is the same as the corresponding OBU radio frequency module and the antenna unit frequency thereof.
The radio frequency modules of different frequencies correspond to different antennas of the OBU antenna unit.
The antenna of the OBU antenna unit, the frequency of which is the same as that of the electronic tag antenna, has coupling degree.
The design of the fragile electronic tag antenna has the following requirements: first, the equivalent circuit resonance of 13.56MHz RFID fragile electronic tag antenna and chip IC is 13.56MHz. And secondly, a 13.56MHz RFID fragile electronic tag antenna has a certain coupling degree with a 13.56MHz radio frequency module and an antenna unit thereof on the OBU, so that the OBU and the RFID electronic tag can normally communicate, and the communication distance range is less than 10cm. Third, the position and the size of the antenna of the 13.56MHz RFID fragile electronic tag do not affect the communication between the 13.46MHz radio frequency module and the user bank card. Fourth, the location and size of the 13.56MHz RFID frangible electronic tag antenna does not affect the communication between the 5.8GHz (second) radio frequency module and the RSU.
In order to prolong the service life of the OBU, the OBU is in a dormant state at ordinary times, when a vehicle runs under a portal frame of a highway and before the RSU, the OBU is awakened by an RSU signal from the dormant state, a 13.56MHz radio frequency module in the OBU and an antenna unit thereof firstly read information of a 13.56MHz RFID fragile electronic tag, and after the information is successfully interacted with the information, the OBU is legal, and the next fee deduction and passing can be carried out. When the OBU is removed, the 13.56MHz RFID fragile electronic tag antenna is destroyed, and the 13.56MHz RFID fragile electronic tag is disabled. After the OBU is awakened, the 13.56MHz radio frequency module in the OBU and the antenna unit thereof cannot read the information of the 13.56MHz RFID fragile electronic tag, and the OBU is judged to be illegally dismantled, so that the OBU does not transact at the moment, and the information of the illegal dismantling can be reported to the RSU. The processing is performed by a worker. Thereby achieving the anti-disassembly effect of the OBU. The flow is shown in fig. 6.
Fig. 7 is a flow chart of a method for secure communication with an on-board unit as disclosed in an embodiment of the present invention. In step 701, when a vehicle equipped with the on-board unit moves within a predetermined area range centered on a roadside unit, the on-board unit in a sleep state receives a signal of a first communication protocol from the roadside unit. In step 702, the on-board unit transitions from a sleep state to an awake state based on the signal of the first communication protocol, and parses the signal of the first communication protocol to obtain an interaction message from the roadside unit. In step 703, based on the interactive message, a first response message corresponding to the interactive message is generated and sent to the drive test unit through the first radio frequency module, and a dead time field is added in the first response message, where the dead time field is used to indicate the dead time of the first response message in the case that no additional acknowledgement message is received. At step 704, a signal of a second communication protocol is sent to the frangible electronic tag to cause the frangible electronic tag to generate a second response message based on the signal of the second communication protocol. In step 705, when a second response message is not received from the frangible electronic tag within a predetermined time, no additional acknowledgement message is sent to the roadside unit to place the first response message in a disabled state.
The predetermined time is less than the failure time. The predetermined position is an upper side of a front windshield of the vehicle. The first communication protocol is different from the second communication protocol and the interactive message comprises an identifier of the roadside unit, location information and an indication to start charging.
The method further comprises the steps of: setting the expiration time, and updating the expiration time field according to the set expiration time; judging the state of the first response message according to the failure time field; when the first response message is in an effective state, the vehicle-mounted unit and the road side unit are in data communication; and when the first response message is in a failure state, the vehicle-mounted unit does not carry out data communication with the road side unit.
The vehicle-mounted unit comprises a vehicle-mounted unit body, wherein the first surface of the vehicle-mounted unit body and the first surface of the fragile electronic tag are adhered through a first adhesive medium, and the second surface of the fragile electronic tag is adhered to a preset position of a vehicle through a second adhesive medium. The sending the signal of the second communication protocol to the fragile electronic tag comprises: and the vehicle-mounted unit sends a signal of a second communication protocol to the fragile electronic tag through a second radio frequency module. Wherein the frangible electronic tag comprises: an electronic tag chip, a fragile substrate and an electronic tag antenna; the electronic tag antenna is printed on the first surface of the fragile substrate, and the electronic tag chip is positioned on the first surface of the fragile substrate. The electronic tag antenna has a coupling degree with an antenna of the vehicle-mounted unit. And the equivalent circuit resonant frequency formed by the electronic tag chip and the electronic tag antenna is respectively the same as the frequency of the second radio frequency module and the antenna unit of the vehicle-mounted unit.
Fig. 8 is a schematic diagram of a system for secure communication with an on-board unit according to an embodiment of the present invention. The system comprises: receiving device 801, converting device 802, generating device 803, transmitting device 804, setting device 805, and judging device 806
The receiving means 801 causes the in-vehicle unit in the sleep state to receive a signal of the first communication protocol from the roadside unit when the vehicle equipped with the in-vehicle unit moves within a predetermined area range centered on the roadside unit.
The conversion device 802 causes the on-board unit to convert from the sleep state to the awake state based on the signal of the first communication protocol, and parses the signal of the first communication protocol to obtain the interaction message from the roadside unit.
The generating means 803 generates a first response message corresponding to the interaction message based on the interaction message and sends the first response message to the drive test unit through the first radio frequency module, and adds a dead time field in the first response message, where the dead time field is used to indicate the dead time of the first response message in the case that no additional acknowledgement message is received.
Transmitting means 804 transmits a signal of a second communication protocol to the frangible electronic tag to cause the frangible electronic tag to generate a second response message based on the signal of the second communication protocol; and when a second response message is not received from the fragile electronic tag within a preset time, not sending an additional confirmation message to the road side unit so that the first response message is in a failure state.
The setting means 805 sets the expiration time, and updates the expiration time field according to the set expiration time.
The judging means 806 judges the state of the first response message according to the expiration time field; when the first response message is in an effective state, the vehicle-mounted unit and the road side unit are in data communication; and when the first response message is in a failure state, the vehicle-mounted unit does not carry out data communication with the road side unit.
The predetermined time is less than the failure time. The predetermined position is an upper side of a front windshield of the vehicle. The first communication protocol is different from the second communication protocol and the interactive message comprises an identifier of the roadside unit, location information and an indication to start charging.
The vehicle-mounted unit comprises a vehicle-mounted unit body, wherein the first surface of the vehicle-mounted unit body and the first surface of the fragile electronic tag are bonded through a first bonding medium, and the second surface of the fragile electronic tag is bonded to a preset position of a vehicle through a second bonding medium. The sending the signal of the second communication protocol to the fragile electronic tag comprises: and the vehicle-mounted unit sends a signal of a second communication protocol to the fragile electronic tag through a second radio frequency module. Wherein the frangible electronic tag comprises: an electronic tag chip, a fragile substrate and an electronic tag antenna; the electronic tag antenna is printed on the first surface of the fragile substrate, and the electronic tag chip is positioned on the first surface of the fragile substrate. The electronic tag antenna has a coupling degree with an antenna of the vehicle-mounted unit. And the equivalent circuit resonant frequency formed by the electronic tag chip and the electronic tag antenna is respectively the same as the frequency of the second radio frequency module and the antenna unit of the vehicle-mounted unit.
The measuring and analyzing software related to the invention is not researched and developed by the inventor and is a technology familiar to the person skilled in the art.
It should be apparent that the above embodiments are merely illustrative of the application of the present method and not limiting of the embodiments, and that various other changes and modifications can be made by one of ordinary skill in the art based on the above description to study other related problems. Therefore, the protection scope of the invention should be as defined in the claims.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of electronic devices and the like are merely illustrative, wherein the elements described as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. A method for secure communication with an on-board unit that is affixed at a predetermined location of a vehicle with a frangible electronic tag, the method comprising:
when a vehicle equipped with the on-board unit moves within a predetermined area range centered on a roadside unit, the on-board unit in a sleep state receives a signal of a first communication protocol from the roadside unit;
based on the signal of the first communication protocol, the vehicle-mounted unit is converted from a dormant state to an awake state, and the signal of the first communication protocol is analyzed to obtain an interaction message from a road side unit;
generating a first response message corresponding to the interaction message based on the interaction message, and sending the first response message to a drive test unit through a first radio frequency module, wherein a dead time field is added in the first response message, and the dead time field is used for indicating the dead time of the first response message under the condition that no additional acknowledgement message is received;
transmitting a signal of a second communication protocol to the fragile electronic tag to cause the fragile electronic tag to generate a second response message based on the signal of the second communication protocol;
when a second response message is not received from the fragile electronic tag within a predetermined time, not sending an additional acknowledgement message to the roadside unit so that the first response message is in a failure state;
the predetermined time is less than the failure time;
the predetermined position is the upper side of a front windshield of the vehicle;
the first communication protocol is different from the second communication protocol, and the interactive message includes an identifier of the road side unit, location information, and an indication to start charging;
setting the expiration time, and updating the expiration time field according to the set expiration time;
judging the state of the first response message according to the failure time field;
when the first response message is in an effective state, the vehicle-mounted unit and the road side unit are in data communication;
and when the first response message is in a failure state, the vehicle-mounted unit does not carry out data communication with the road side unit.
2. A system for secure communication with an on-board unit that is affixed to a vehicle at a predetermined location along with a 10-frangible electronic tag, the system comprising:
a receiving device that causes the in-vehicle unit in a sleep state to receive a signal of a first communication protocol from the roadside unit when a vehicle equipped with the in-vehicle unit moves within a predetermined area range centered on the roadside unit;
the conversion device is used for promoting the vehicle-mounted unit to be converted from a dormant state to an awake state based on the signal of the first communication protocol, and analyzing the signal of the first communication protocol to acquire an interaction message from a road side unit;
generating a first response message corresponding to the interaction message based on the interaction message, and sending the first response message to a drive test unit through a first radio frequency module, wherein a dead time field is added in the first response message, and the dead time field is used for indicating the dead time of the first response message under the condition that no additional acknowledgement message is received;
a transmitting device for transmitting a signal of a second communication protocol to the fragile electronic tag so as to cause the fragile electronic tag to generate a second response message based on the signal of the second communication protocol;
when a second response message is not received from the fragile electronic tag within a predetermined time, not sending an additional acknowledgement message to the roadside unit so that the first response message is in a failure state;
the predetermined time is less than the failure time;
the predetermined position is the upper side of a front windshield of the vehicle;
the first communication protocol is different from the second communication protocol, and the interactive message includes an identifier of the road side unit, location information, and an indication to start charging;
the setting device is used for setting the failure time and updating the failure time field according to the set failure time;
the judging device judges the state of the first response message according to the failure time field; when the first response message is in an effective state, the vehicle-mounted unit and the road side unit are in data communication;
and when the first response message is in a failure state, the vehicle-mounted unit does not carry out data communication with the road side unit.
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| CN201911406334.8A CN111222602B (en) | 2019-12-31 | 2019-12-31 | Method and system for carrying out secure communication with vehicle-mounted unit |
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| CN113395651A (en) * | 2021-06-01 | 2021-09-14 | 深圳市明华澳汉智能卡有限公司 | Control method of highway composite access card and highway composite access card |
| CN114362843A (en) * | 2021-12-27 | 2022-04-15 | 北京万集科技股份有限公司 | Method and device for detecting vehicle-mounted unit and related product |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169601A (en) * | 2011-01-24 | 2011-08-31 | 北京北大千方科技有限公司 | Anti-dismantling method and system of on-board unit (OBU) as well as OBU |
| WO2012119305A1 (en) * | 2011-03-08 | 2012-09-13 | 深圳市金溢科技有限公司 | System and method for charging authentication in an intelligent traffic system |
| CN102800133A (en) * | 2012-06-25 | 2012-11-28 | 北京速通科技有限公司 | Electronic disassembling preventing method and electronic disassembling preventing system for electronic toll collection (ETC) electronic tags |
| KR20130072578A (en) * | 2011-12-22 | 2013-07-02 | 현대모비스 주식회사 | Automatic fare collection device with anti-dismantling the vehicle control system and automatic fare collection devices using the same method for preventing dissolution |
| CN103235968A (en) * | 2013-03-25 | 2013-08-07 | 北京速通科技有限公司 | Detaching prevention method for vehicular electronic tags |
| CN103247085A (en) * | 2013-05-20 | 2013-08-14 | 北京速通科技有限公司 | Front-mounted electronic toll collection (ETC) on board unit online publication system and method |
| CN103413163A (en) * | 2013-07-31 | 2013-11-27 | 北京握奇数据系统有限公司 | Method and system for separating safety control and anti-demounting function from OBU main body |
| CN203666516U (en) * | 2013-11-28 | 2014-06-25 | 深圳市金溢科技股份有限公司 | Rearview mirror and automobile |
| CN104021595A (en) * | 2014-05-30 | 2014-09-03 | 北京速通科技有限公司 | DSRC protocol based ETC rod side unit (RSU) and concurrent transaction method |
| CN104952116A (en) * | 2014-03-27 | 2015-09-30 | 深圳市金溢科技股份有限公司 | Information processing method, apparatus, OBU and system based on ETC system |
| CN205263886U (en) * | 2015-12-29 | 2016-05-25 | 北京万集科技股份有限公司 | Anti -disassembly detection circuitry and vehicle -mounted electronic label |
| CN106447804A (en) * | 2015-08-05 | 2017-02-22 | 上海华虹集成电路有限责任公司 | Vehicle-mounted unit anti-disassembly method in electronic toll collection (ETC) system and ETC device |
| WO2017072686A1 (en) * | 2015-10-29 | 2017-05-04 | Imaginalis S.R.L. | Imaging device |
| CN107221041A (en) * | 2017-04-11 | 2017-09-29 | 北京握奇智能科技有限公司 | A kind of Anti-dismantling OBU and its tamper management-control method |
| US10094901B1 (en) * | 2017-06-13 | 2018-10-09 | International Business Machines Corporation | Secure communication with a traffic control system |
| CN109532737A (en) * | 2013-05-17 | 2019-03-29 | Fybr有限责任公司 | Distributed remote sensing system, sensor device |
| CN109741472A (en) * | 2019-01-17 | 2019-05-10 | 广州市沙唯士电子科技有限公司 | A kind of safety-type vehicle-mounted ETC device of Anti-dismantling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050082746A1 (en) * | 2003-08-04 | 2005-04-21 | Yoshiyuki Tsuzawa | Sheet member transporting device and method of controlling the same |
-
2019
- 2019-12-31 CN CN201911406334.8A patent/CN111222602B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169601A (en) * | 2011-01-24 | 2011-08-31 | 北京北大千方科技有限公司 | Anti-dismantling method and system of on-board unit (OBU) as well as OBU |
| WO2012119305A1 (en) * | 2011-03-08 | 2012-09-13 | 深圳市金溢科技有限公司 | System and method for charging authentication in an intelligent traffic system |
| KR20130072578A (en) * | 2011-12-22 | 2013-07-02 | 현대모비스 주식회사 | Automatic fare collection device with anti-dismantling the vehicle control system and automatic fare collection devices using the same method for preventing dissolution |
| CN102800133A (en) * | 2012-06-25 | 2012-11-28 | 北京速通科技有限公司 | Electronic disassembling preventing method and electronic disassembling preventing system for electronic toll collection (ETC) electronic tags |
| CN103235968A (en) * | 2013-03-25 | 2013-08-07 | 北京速通科技有限公司 | Detaching prevention method for vehicular electronic tags |
| CN109532737A (en) * | 2013-05-17 | 2019-03-29 | Fybr有限责任公司 | Distributed remote sensing system, sensor device |
| CN103247085A (en) * | 2013-05-20 | 2013-08-14 | 北京速通科技有限公司 | Front-mounted electronic toll collection (ETC) on board unit online publication system and method |
| CN103413163A (en) * | 2013-07-31 | 2013-11-27 | 北京握奇数据系统有限公司 | Method and system for separating safety control and anti-demounting function from OBU main body |
| CN203666516U (en) * | 2013-11-28 | 2014-06-25 | 深圳市金溢科技股份有限公司 | Rearview mirror and automobile |
| CN104952116A (en) * | 2014-03-27 | 2015-09-30 | 深圳市金溢科技股份有限公司 | Information processing method, apparatus, OBU and system based on ETC system |
| CN104021595A (en) * | 2014-05-30 | 2014-09-03 | 北京速通科技有限公司 | DSRC protocol based ETC rod side unit (RSU) and concurrent transaction method |
| CN106447804A (en) * | 2015-08-05 | 2017-02-22 | 上海华虹集成电路有限责任公司 | Vehicle-mounted unit anti-disassembly method in electronic toll collection (ETC) system and ETC device |
| WO2017072686A1 (en) * | 2015-10-29 | 2017-05-04 | Imaginalis S.R.L. | Imaging device |
| CN205263886U (en) * | 2015-12-29 | 2016-05-25 | 北京万集科技股份有限公司 | Anti -disassembly detection circuitry and vehicle -mounted electronic label |
| CN107221041A (en) * | 2017-04-11 | 2017-09-29 | 北京握奇智能科技有限公司 | A kind of Anti-dismantling OBU and its tamper management-control method |
| US10094901B1 (en) * | 2017-06-13 | 2018-10-09 | International Business Machines Corporation | Secure communication with a traffic control system |
| CN109741472A (en) * | 2019-01-17 | 2019-05-10 | 广州市沙唯士电子科技有限公司 | A kind of safety-type vehicle-mounted ETC device of Anti-dismantling |
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|---|---|
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