CN111192371B - Expressway charging method and system based on GNSS equipment - Google Patents

Expressway charging method and system based on GNSS equipment Download PDF

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Publication number
CN111192371B
CN111192371B CN201911292656.4A CN201911292656A CN111192371B CN 111192371 B CN111192371 B CN 111192371B CN 201911292656 A CN201911292656 A CN 201911292656A CN 111192371 B CN111192371 B CN 111192371B
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gnss
information
obu
equipment
etc portal
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CN111192371A (en
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徐宏强
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Beijing Watchdata Co ltd
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Beijing Watchdata Co ltd
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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position
    • 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

Abstract

The invention discloses a highway charging method and a system based on GNSS equipment, wherein the method comprises the following steps: s1, when a vehicle enters an expressway entrance, an entrance RSU activates a Bluetooth module of an OBU, and a GNSS device is started; s2, when the vehicle normally runs on the expressway, the OBU randomly acquires current GNSS information of the GNSS equipment, and the current GNSS information is uploaded to a charging background through the GNSS equipment after being encrypted; s3, when the vehicle passes through the ETC portal, the OBU acquires GNSS information of the ETC portal and current GNSS information of the GNSS equipment, and the GNSS information is uploaded to a charging background through the GNSS equipment after being encrypted; and S4, when the vehicle exits the expressway, the exit RSU acquires the information of the OBU and uploads the information to the charging background, the charging background acquires the data uploaded by the GNSS device according to the information of the OBU, and whether the GNSS device is credible or not is confirmed according to the data uploaded by the GNSS device. According to the invention, the charging center confirms the credibility of the GNSS equipment according to the data uploaded by the GNSS equipment, so as to confirm the credibility of the GNSS information of the GNSS equipment, and ensure the accuracy and safety of charging.

Description

Expressway charging method and system based on GNSS equipment
Technical Field
The invention relates to the field of expressway charging, in particular to an expressway charging method and system based on GNSS equipment.
Background
The elimination of the provincial toll gate and the acceleration of ETC are of great importance, and under the guidance of national policy, along with the increase of the preferential strength of the issuing institution, the installation rate of ETC vehicle-mounted equipment in the home automobile can be expected to reach 80% at the end of 2019.
According to the general technical scheme of the highway provincial toll station, ETC vehicle charging mode is adjusted to free flow charging, the existing entrance/exit toll station is reserved, an ETC portal frame is built on the section along the highway inside a highway network, and the passing vehicles are subjected to sectional charging through ETC technology, so that the vehicles do not stop and pass rapidly. The ETC portal is fixed, meaning that the charging point is fixed.
GNSS information provides a more flexible charging scheme for solving the segmented charging problem, which is superior to the current charging scheme, but the precondition of GNSS information application requires that the GNSS information for charging is trusted. Whether the GNSS information is trusted has two meanings, namely whether the GNSS device is a Trusted Security Module (TSM) or not; secondly, whether the GNSS information received by the device is correct or not, the following description mainly refers to the first point. Whether the vehicle-mounted intelligent communication equipment or the portable intelligent communication equipment has a GNSS function, the path information can be recorded, but how to confirm whether the GNSS information provided by the vehicle-mounted intelligent communication equipment is reliable is a problem to be solved. The OBU is internally provided with a uniformly issued security module (ESAM), is a trusted device for the ETC manager, and does not have a GNSS function; in-vehicle smart communication devices or portable smart communication devices are typically GNSS enabled, but cannot be considered a trusted device for ETC authorities.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a highway charging method and a system based on GNSS equipment, which are used for confirming the credibility of the GNSS equipment and ensuring the accuracy and the safety of charging.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a highway billing method based on GNSS equipment, the highway billing method comprising:
(1) When a vehicle enters a highway entrance, the entrance RSU activates a Bluetooth module of the OBU and starts GNSS equipment;
(2) When the vehicle normally runs on a highway, the OBU randomly acquires current GNSS information of the GNSS equipment, and uploads the current GNSS information to a charging background through the GNSS equipment after encryption;
(3) When the vehicle passes through the ETC portal, the OBU acquires GNSS information of the ETC portal and current GNSS information of the GNSS equipment, and the GNSS information is uploaded to the charging background through the GNSS equipment after being encrypted;
(4) When the vehicle exits the expressway, the exit RSU acquires the information of the OBU and uploads the information to the charging background, the charging background acquires the data uploaded by the GNSS device according to the information of the OBU, and confirms whether the GNSS device is credible or not according to the data uploaded by the GNSS device, if so, normal fee deduction is carried out, and if not, abnormal processing is carried out, and manual checking is carried out.
Further, the highway charging method as described above, the step (1) includes:
when a vehicle enters an expressway entrance, an entrance RSU sends a DSRC signal to activate a Bluetooth module of an OBU, the OBU communicates with the GNSS device through the Bluetooth module, and the GNSS device starts an application for acquiring GNSS information.
Further, the highway charging method as described above, the step (2) includes:
when the vehicle normally runs on the expressway, the OBU acquires current GNSS information of the GNSS device according to random time intervals, sends the current GNSS information to the GNSS device after being encrypted by ESAM, and uploads the current GNSS information to a charging background through the GNSS device.
Further, the highway charging method as described above, the step (3) includes:
when the vehicle passes through the ETC portal, the OBU acquires GNSS information of the ETC portal and current GNSS information of the GNSS device, and the GNSS information of the ETC portal and the current GNSS information of the GNSS device are encrypted by using the ESAM and then sent to the GNSS device, and uploaded to the charging background through the GNSS device.
Further, as described above, the method for highway charging, the step of sending the encrypted GNSS information of the ETC portal and the current GNSS information of the GNSS device to the GNSS device by the OBU using ESAM includes:
when the vehicle passes through the ETC portal, the OBU receives the random number downloaded by the ETC portal, and updates the random number once when passing through one ETC portal;
the OBU generates a CRC value for the acquired GNSS information, and replaces the lowest two bytes of the random number with the CRC value;
the OBU encrypts the random number by using an ESAM encryption key to form an authentication code;
and the OBU encrypts the acquired GNSS information and the identification code by using encryption operation and then transmits the GNSS information and the identification code to the GNSS equipment.
Further, in the highway charging method as described above, in step (4), after the charging background confirms the following information according to the data uploaded by the GNSS device, the GNSS device is confirmed to be trusted:
the GNSS information of the GNSS device has continuity in time and position;
the GNSS information of the ETC portal is consistent with the current GNSS information of the GNSS equipment when the vehicle passes through the ETC portal;
the received GNSS information is encrypted by the OBU.
A highway billing system based on a GNSS device, the highway billing system comprising: an entrance RSU, an ETC portal, OBU and GNSS equipment in the vehicle, an exit RSU and a charging background;
the entrance RSU is used for activating a Bluetooth module of the OBU and starting GNSS equipment when the vehicle enters the expressway entrance;
the OBU is used for randomly acquiring current GNSS information of the GNSS equipment when the vehicle normally runs on a highway, and uploading the current GNSS information to the charging background through the GNSS equipment after encryption;
the OBU is used for acquiring GNSS information of the ETC portal and current GNSS information of the GNSS equipment when the vehicle passes through the ETC portal, and uploading the GNSS information and the current GNSS information to the charging background through the GNSS equipment after encryption;
the exit RSU is used for acquiring information of the OBU and uploading the information to the charging background when the vehicle exits from the expressway exit;
the charging background is used for acquiring data uploaded by the GNSS equipment according to the information of the OBU, confirming whether the GNSS equipment is credible according to the data uploaded by the GNSS equipment, if so, carrying out normal fee deduction, and if not, carrying out exception handling and manual checking.
Further, in the expressway charging system as described above, the OBU is specifically configured to:
when the vehicle normally runs on the expressway, current GNSS information of the GNSS equipment is acquired according to random time intervals, and is sent to the GNSS equipment after being encrypted by ESAM, and is uploaded to a charging background through the GNSS equipment.
Further, in the expressway charging system as described above, the OBU is specifically configured to:
when the vehicle passes through the ETC portal, acquiring GNSS information of the ETC portal and current GNSS information of the GNSS device, encrypting the GNSS information of the ETC portal and the current GNSS information of the GNSS device by using ESAM, and then sending the encrypted GNSS information to the GNSS device, and uploading the encrypted GNSS information to the charging background through the GNSS device.
Further, in the highway billing system as described above, the billing background is configured to confirm that the GNSS device is trusted after confirming the following information according to the data uploaded by the GNSS device:
the GNSS information of the GNSS device has continuity in time and position;
the GNSS information of the ETC portal is consistent with the current GNSS information of the GNSS equipment when the vehicle passes through the ETC portal;
the received GNSS information is encrypted by the OBU.
The invention has the beneficial effects that: according to the method and the system provided by the invention, the OBU in the vehicle acquires the GNSS information of the GNSS equipment in the vehicle according to a certain random time interval. When a vehicle passes through the ETC portal, the OBU acquires GNSS information of the ETC portal and GNSS information of the GNSS equipment at the same time, the GNSS information is encrypted and transmitted back to the GNSS equipment, the GNSS equipment is uploaded to the charging center, and the charging center confirms the credibility of the GNSS equipment according to the data uploaded by the GNSS equipment, so that the credibility of the GNSS information of the GNSS equipment is confirmed, charging errors caused by errors of the GNSS information are avoided, and charging accuracy and safety are guaranteed.
Drawings
Fig. 1 is a flow chart of a highway billing method based on GNSS equipment according to an embodiment of the present invention;
FIG. 2 is a flow chart of operation of a vehicle provided in an embodiment of the present invention when entering an expressway entrance;
FIG. 3 is a flowchart of the operation of the vehicle according to the embodiment of the present invention when traveling normally on a highway;
FIG. 4 is a flowchart illustrating operation of a vehicle provided in an embodiment of the present invention as it passes through an ETC portal;
fig. 5 is a flowchart showing operations when a vehicle exits an expressway exit provided in an embodiment of the invention;
fig. 6 is a schematic diagram of functional modules of an intelligent communication device and an OBU provided in an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1, a highway charging method based on a GNSS device includes:
s1, when a vehicle enters an expressway entrance, an entrance RSU activates a Bluetooth module of an OBU, and a GNSS device is started;
the step S1 comprises the following steps:
when a vehicle enters an expressway entrance, the entrance RSU sends a DSRC signal to activate a Bluetooth module of the OBU, the OBU communicates with the GNSS device through the Bluetooth module, and the GNSS device starts an application for acquiring GNSS information.
S2, when the vehicle normally runs on the expressway, the OBU randomly acquires current GNSS information of the GNSS equipment, and the current GNSS information is uploaded to a charging background through the GNSS equipment after being encrypted;
the step S2 comprises the following steps:
when the vehicle normally runs on the expressway, the OBU acquires current GNSS information of the GNSS device according to random time intervals, sends the current GNSS information to the GNSS device after the current GNSS information is encrypted by ESAM, and uploads the current GNSS information to the charging background through the GNSS device.
S3, when the vehicle passes through the ETC portal, the OBU acquires GNSS information of the ETC portal and current GNSS information of the GNSS equipment, and the GNSS information is uploaded to a charging background through the GNSS equipment after being encrypted;
the step S3 comprises the following steps:
when the vehicle passes through the ETC portal, the OBU acquires GNSS information of the ETC portal and current GNSS information of the GNSS device, and the GNSS information of the ETC portal and the current GNSS information of the GNSS device are encrypted by using the ESAM and then sent to the GNSS device, and uploaded to the charging background through the GNSS device.
The OBU uses ESAM to send GNSS information of ETC portal and current GNSS information of GNSS equipment to GNSS equipment after encrypting, includes:
when a vehicle passes through the ETC portal, the OBU receives the random number downloaded by the ETC portal, and updates the random number once when passing through one ETC portal;
the OBU generates a CRC value for the acquired GNSS information, and replaces the lowest two bytes of the random number with the CRC value;
the OBU encrypts the random number by using an ESAM encryption key to form an authentication code;
the OBU uses the encryption operation to encrypt the acquired GNSS information and the authentication code and then sends the GNSS information and the authentication code to the GNSS equipment.
S4, when the vehicle exits the expressway, the exit RSU acquires the information of the OBU and uploads the information to the charging background, the charging background acquires the data uploaded by the GNSS device according to the information of the OBU, and confirms whether the GNSS device is credible according to the data uploaded by the GNSS device, if so, normal fee deduction is carried out, and if not, abnormal processing is carried out, and manual checking is carried out.
In step S4, after the charging background confirms the following information according to the data uploaded by the GNSS device, the GNSS device is confirmed to be trusted:
the GNSS information of the GNSS device has continuity in time and position;
the GNSS information of the ETC portal is consistent with the current GNSS information of the GNSS equipment when the vehicle passes through the ETC portal;
the received GNSS information is encrypted by the OBU.
The charging background confirms that the GNSS equipment is credible, namely, the GNSS information generated by the GNSS equipment can be confirmed to be credible and can be used for charging. The charging background of the present invention may be a background server.
The GNSS device of the invention can be a vehicle-mounted intelligent communication device or a portable intelligent communication device (hereinafter collectively referred to as intelligent communication device) with GNSS function, which can be interconnected with an on-board OBU (a typical communication mode is Bluetooth) on a vehicle, and can communicate with a charging background through a wide area network, and the OBU and the RSU communicate through DSRC.
The OBU acquires GNSS information of the intelligent communication equipment according to a certain random time interval, and the intelligent communication equipment cannot distinguish whether the request for acquiring the GNSS information is triggered by the ETC portal.
The charging background judges whether GNSS information generated by the intelligent communication equipment is credible or not through the following three points:
1. the GNSS information of the vehicle has the characteristics of time and position continuity;
2. the GNSS position of the ETC portal is known, so the time and position of the vehicle through the ETC portal can be verified;
3. GNSS information transmitted to the charging background by the intelligent communication equipment is subjected to encryption authentication of ESAM of the OBU.
As shown in fig. 2, after a vehicle enters a highway entrance, the OBU acquires GNSS information of the intelligent communication device at certain random time intervals, encrypts the GNSS information and returns the GNSS information to the intelligent communication device, and the GNSS information is transmitted to a billing background by the intelligent communication device. The specific process flow is as follows:
a1, when a vehicle enters an expressway entrance, an entrance RSU sends a DSRC signal to activate a Bluetooth module of an OBU, and the entrance RSU generates a random number and sends the random number to the OBU;
a2, the OBU communicates with intelligent communication equipment through a Bluetooth module;
a3, the intelligent communication equipment starts an application for acquiring GNSS information.
As shown in fig. 3, when the vehicle is traveling normally on the expressway, the process flow is as follows:
b1, when the vehicle normally runs, the intelligent communication equipment acquires GNSS information;
b2, judging whether the OBU has reached the random time for acquiring the GNSS information of the intelligent communication equipment, if so, transmitting the acquired GNSS information to the OBU by the intelligent communication equipment, and if not, returning to the B1;
b3, the OBU encrypts the received GNSS information by using ESAM and transmits the information back to the intelligent communication equipment;
and B4, the intelligent communication equipment uploads the received encrypted data to a charging background.
As shown in fig. 4, when the vehicle passes through the ETC portal, the RSU encrypts the GNSS information of the ETC portal and transmits the encrypted GNSS information to the OBU, and at the same time, the OBU acquires the GNSS information of the intelligent communications device and encrypts the GNSS information, and the OBU transmits the encrypted GNSS information to the intelligent communications device, and the intelligent communications device transmits the encrypted GNSS information to the billing background. The specific process flow is as follows:
c1, when a vehicle normally runs, the intelligent communication equipment acquires GNSS information;
c2, when the vehicle passes through the ETC portal, the RSU of the ETC portal encrypts GNSS information of the ETC portal and transmits the GNSS information to the OBU, and generates a random number and transmits the random number to the OBU;
c3, the OBU sends a request for inquiring GNSS information to the intelligent communication equipment;
c4, the intelligent communication equipment transmits the acquired GNSS information to the OBU;
c5, the OBU encrypts GNSS information acquired by the intelligent communication equipment and GNSS information of the ETC portal by using the ESAM and then transmits the GNSS information back to the intelligent communication equipment;
and C6, the intelligent communication equipment uploads the received encrypted data to the charging background.
As shown in fig. 5, when the vehicle exits the highway exit, the process flow is as follows:
d1, when a vehicle enters a highway exit, an exit RSU acquires information of an OBU and sends the information to a charging background;
d2, the charging background acquires the GNSS information acquired by the stored intelligent communication equipment according to the OBU information, the GNSS information acquired by the intelligent communication equipment when the vehicle passes through the ETC portal and the GNSS information of the ETC portal, judges whether the intelligent communication equipment is credible, charges if the intelligent communication equipment is credible, and feeds back fee deduction information;
and D3, judging whether the charging information fed back by the charging background is normal, if so, allowing the vehicle to run out, closing the Bluetooth module of the OBU, and if not, allowing the vehicle to enter abnormal processing, such as manual checking.
In the above processes, the encryption of the GNSS information by the OBU further comprises the process of identifying codes, so that the correctness and the integrity of the data can be ensured, and the specific process is as follows:
e1, when a vehicle passes through an RSU or an ETC portal, the OBU receives the random number downloaded by the RSU or the ETC portal, and updates the random number once through one ETC portal;
e2, the OBU generates a CRC value for the GNSS information, and the CRC value is replaced by the lowest two bytes of the 8-byte random number generated by the RSU or the ETC portal;
e3, the OBU encrypts the random number by using an ESAM encryption key to form an authentication code MAC of the national standard;
e4, the OBU encrypts the GNSS information and the identification code by using encryption operation and transmits the GNSS information and the identification code to the intelligent communication equipment;
e5, the intelligent communication equipment transmits the received encrypted data to a charging background;
and E6, decrypting the received encrypted data by the charging background and verifying the authentication code.
The authentication code is used for ensuring the integrity of data and the encryption operation ensures the safety of the data.
OBU and intelligent communications device are in same vehicle, can carry out bluetooth communication, and OBU and intelligent communications device's block diagram is as shown in FIG. 6. And the OBU acquires GNSS information of the intelligent communication equipment according to a certain random time interval. When passing through the ETC portal, the RSU encrypts the GNSS information of the ETC portal and then transmits the GNSS information to the OBU, and meanwhile, the OBU also acquires the GNSS information of the intelligent communication equipment. The OBU encrypts the received two GNSS information and transmits the encrypted GNSS information back to the intelligent communication equipment, and the intelligent communication equipment transmits the encrypted GNSS information to the charging center. ETC portal no longer possesses the charge function, but possesses inspection and check function. The intelligent communication equipment cannot hijack the GNSS information by a man in the middle, and is easy to find after modification, so that the uploaded GNSS information can be ensured to be credible and can be used for charging.
The invention also provides a highway charging system based on the GNSS equipment, which comprises: an entrance RSU, an ETC portal, OBU and GNSS equipment in the vehicle, an exit RSU and a charging background;
the entrance RSU is used for activating a Bluetooth module of the OBU and starting GNSS equipment when the vehicle enters the expressway entrance;
when a vehicle enters an expressway entrance, the entrance RSU sends a DSRC signal to activate a Bluetooth module of the OBU, the OBU communicates with the GNSS device through the Bluetooth module, and the GNSS device starts an application for acquiring GNSS information.
The OBU is used for randomly acquiring current GNSS information of the GNSS equipment when the vehicle normally runs on the expressway, and uploading the current GNSS information to the charging background through the GNSS equipment after encryption;
OBU is specifically for:
when the vehicle normally runs on the expressway, current GNSS information of the GNSS equipment is acquired according to random time intervals, and is sent to the GNSS equipment after being encrypted by ESAM, and is uploaded to a charging background through the GNSS equipment.
The OBU is used for acquiring GNSS information of the ETC portal and current GNSS information of the GNSS equipment when the vehicle passes through the ETC portal, and uploading the GNSS information and the current GNSS information to the charging background through the GNSS equipment after encryption;
OBU is specifically for:
when a vehicle passes through the ETC portal, acquiring GNSS information of the ETC portal and current GNSS information of the GNSS equipment, encrypting the GNSS information of the ETC portal and the current GNSS information of the GNSS equipment by using ESAM, and then sending the encrypted GNSS information to the GNSS equipment, and uploading the encrypted GNSS information to a charging background through the GNSS equipment.
The OBU uses ESAM to send GNSS information of ETC portal and current GNSS information of GNSS equipment to GNSS equipment after encrypting, includes:
when a vehicle passes through the ETC portal, the OBU receives the random number downloaded by the ETC portal, and updates the random number once when passing through one ETC portal;
the OBU generates a CRC value for the acquired GNSS information, and replaces the lowest two bytes of the random number with the CRC value;
the OBU encrypts the random number by using an ESAM encryption key to form an authentication code;
the OBU encrypts the acquired GNSS information and the authentication code by using the encryption key of the ESAM and then transmits the GNSS information and the authentication code to the GNSS equipment.
The exit RSU is used for acquiring information of the OBU and uploading the information to the charging background when the vehicle exits the expressway exit;
the charging background is used for acquiring data uploaded by the GNSS equipment according to the information of the OBU, confirming whether the GNSS equipment is credible according to the data uploaded by the GNSS equipment, if so, carrying out normal fee deduction, and if not, carrying out exception handling and manual checking.
The charging background is used for confirming the following information according to the data uploaded by the GNSS equipment and then confirming that the GNSS equipment is credible:
the GNSS information of the GNSS device has continuity in time and position;
the GNSS information of the ETC portal is consistent with the current GNSS information of the GNSS equipment when the vehicle passes through the ETC portal;
the received GNSS information is encrypted by the OBU.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (8)

1. The highway charging method based on the GNSS equipment is characterized by comprising the following steps:
(1) When a vehicle enters a highway entrance, the entrance RSU activates a Bluetooth module of the OBU and starts GNSS equipment;
(2) When the vehicle normally runs on a highway, the OBU randomly acquires current GNSS information of the GNSS equipment, and uploads the current GNSS information to a charging background through the GNSS equipment after encryption;
(3) When the vehicle passes through the ETC portal, the OBU acquires GNSS information of the ETC portal and current GNSS information of the GNSS equipment, and the GNSS information is uploaded to the charging background through the GNSS equipment after being encrypted;
(4) When the vehicle exits from the expressway, an exit RSU acquires information of the OBU and uploads the information to the charging background, the charging background acquires data uploaded by the GNSS device according to the information of the OBU, and confirms whether the GNSS device is credible according to the data uploaded by the GNSS device, if so, normal fee deduction is carried out, if not, abnormal processing is carried out, and manual checking is carried out;
the determining whether the GNSS device is trusted according to the data uploaded by the GNSS device includes: the GNSS information of the vehicle has the characteristics of time and position continuity; the GNSS position of the ETC portal is known, so the time and position of the vehicle passing the ETC portal can be verified, i.e. the GNSS information of the ETC portal is consistent with the current GNSS information of the GNSS device when the vehicle passes the ETC portal; the GNSS information transmitted to the billing background by the GNSS device is subject to the ESAM encryption authentication of the OBU.
2. The highway billing method according to claim 1, wherein step (1) includes:
when a vehicle enters an expressway entrance, an entrance RSU sends a DSRC signal to activate a Bluetooth module of an OBU, the OBU communicates with the GNSS device through the Bluetooth module, and the GNSS device starts an application for acquiring GNSS information.
3. The highway billing method according to claim 1, wherein step (2) includes:
when the vehicle normally runs on the expressway, the OBU acquires current GNSS information of the GNSS device according to random time intervals, sends the current GNSS information to the GNSS device after being encrypted by ESAM, and uploads the current GNSS information to a charging background through the GNSS device.
4. The highway charging method according to claim 1, wherein step (3) includes:
when the vehicle passes through the ETC portal, the OBU acquires GNSS information of the ETC portal and current GNSS information of the GNSS device, and the GNSS information of the ETC portal and the current GNSS information of the GNSS device are encrypted by using the ESAM and then sent to the GNSS device, and uploaded to the charging background through the GNSS device.
5. The highway billing method of claim 4, wherein the OBU encrypts GNSS information of the ETC portal and current GNSS information of the GNSS device using ESAM and transmits the encrypted GNSS information to the GNSS device, comprising:
when the vehicle passes through the ETC portal, the OBU receives the random number downloaded by the ETC portal, and updates the random number once when passing through one ETC portal;
the OBU generates a CRC value for the acquired GNSS information, and replaces the lowest two bytes of the random number with the CRC value;
the OBU encrypts the random number by using an ESAM encryption key to form an authentication code;
and the OBU encrypts the acquired GNSS information and the identification code by using encryption operation and then transmits the GNSS information and the identification code to the GNSS equipment.
6. A highway billing system based on GNSS equipment, the highway billing system comprising: an entrance RSU, an ETC portal, OBU and GNSS equipment in the vehicle, an exit RSU and a charging background;
the entrance RSU is used for activating a Bluetooth module of the OBU and starting GNSS equipment when the vehicle enters the expressway entrance;
the OBU is used for randomly acquiring current GNSS information of the GNSS equipment when the vehicle normally runs on a highway, and uploading the current GNSS information to the charging background through the GNSS equipment after encryption;
the OBU is used for acquiring GNSS information of the ETC portal and current GNSS information of the GNSS equipment when the vehicle passes through the ETC portal, and uploading the GNSS information and the current GNSS information to the charging background through the GNSS equipment after encryption;
the exit RSU is used for acquiring information of the OBU and uploading the information to the charging background when the vehicle exits from the expressway exit;
the charging background is used for acquiring data uploaded by the GNSS equipment according to the information of the OBU, confirming whether the GNSS equipment is credible or not according to the data uploaded by the GNSS equipment, if so, carrying out normal fee deduction, and if not, carrying out exception handling and manual checking;
the determining whether the GNSS device is trusted according to the data uploaded by the GNSS device includes: the GNSS information of the vehicle has the characteristics of time and position continuity; the GNSS position of the ETC portal is known, so the time and position of the vehicle passing the ETC portal can be verified, i.e. the GNSS information of the ETC portal is consistent with the current GNSS information of the GNSS device when the vehicle passes the ETC portal; the GNSS information transmitted to the billing background by the GNSS device is subject to the ESAM encryption authentication of the OBU.
7. The highway billing system of claim 6, wherein the OBU is specifically configured to:
when the vehicle normally runs on the expressway, current GNSS information of the GNSS equipment is acquired according to random time intervals, and is sent to the GNSS equipment after being encrypted by ESAM, and is uploaded to a charging background through the GNSS equipment.
8. The highway billing system of claim 7, wherein the OBU is specifically configured to:
when the vehicle passes through the ETC portal, acquiring GNSS information of the ETC portal and current GNSS information of the GNSS device, encrypting the GNSS information of the ETC portal and the current GNSS information of the GNSS device by using ESAM, and then sending the encrypted GNSS information to the GNSS device, and uploading the encrypted GNSS information to the charging background through the GNSS device.
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