A roadside unit and a toll collection system based on the roadside unit

Abstract

This utility model relates to the field of intelligent transportation and discloses a roadside unit and a toll collection system based on the roadside unit. The roadside unit includes: a main control module and a signal transceiver module, a PSAM authentication module, a power supply module, and a communication module, all communicatively connected to the main control module. The signal transceiver module receives a first signal from the on-board unit and forwards it to the main control module. The PSAM authentication module receives a first digital signal forwarded by the main control module, authenticates the on-board unit based on the first digital signal, verifies the legitimacy of the on-board unit, and feeds back the authentication and verification results to the main control module. The main control module calculates transaction information based on the authentication and verification results and sends the transaction information to the communication module and the on-board unit. The communication module connects to the toll collection terminal and transmits the transaction information to the terminal. This solution achieves an integrated design of the roadside unit and PSAM authentication, simplifying the installation and use of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of intelligent transportation, and in particular to a roadside unit and a toll collection system based on the roadside unit. Background Technology

[0002] In the field of intelligent transportation, the roadside unit (RSU) is a key device in the vehicle-road cooperative system. It undertakes the communication tasks with the on-board unit (OBU) and other intelligent devices, and plays an important role in ensuring efficient traffic operation and improving traffic safety.

[0003] In existing intelligent transportation systems, the PSAM (Password Secure Access Module) authentication function is implemented based on a separate device, which is typically independent of the roadside unit. This separate design leads to a series of technical problems. Firstly, the installation process is complex, requiring separate installation, debugging, and configuration of the PSAM authentication device and the roadside unit, increasing time and labor costs. Secondly, due to the separation of the devices, operators need to possess the knowledge and skills to operate two different devices, placing high demands on their abilities. Furthermore, the separate devices are prone to connection failures during use, affecting the stability and reliability of the system. Utility Model Content

[0004] The purpose of this utility model is to provide a roadside unit and a toll collection system based on the roadside unit, which integrates the PSAM certification function into the roadside unit, realizes the integrated design of roadside unit and PSAM certification, simplifies the installation and use of equipment, and improves efficiency.

[0005] To address the aforementioned technical problems, this utility model provides a roadside unit, comprising: a main control module and a signal transceiver module, a PSAM authentication module, a power supply module, and a communication module communicatively connected to the main control module; wherein, the signal transceiver module is used to receive a first signal from the vehicle-mounted unit and forward it to the main control module; the PSAM authentication module is used to receive a first digital signal forwarded by the main control module, perform identity authentication on the vehicle-mounted unit based on the first digital signal, verify the legitimacy of the vehicle-mounted unit, and feed back the authentication result and verification result to the main control module; the main control module is used to calculate transaction information based on the authentication result and the verification result, and send the transaction information to the communication module and the vehicle-mounted unit; the power supply module is used to supply power to the main control module, the signal transceiver module, the PSAM authentication module, and the communication module; the communication module is connected to a toll terminal and is used to transmit the transaction information to the toll terminal.

[0006] In one example, the first signal as described above includes at least the device identification information of the vehicle unit.

[0007] In one example, the signal transceiver module described above is also used to demodulate the first signal into the first digital signal and forward it to the main control module.

[0008] In one example, the signal transceiver module described above is also used to send a second signal to the vehicle unit; wherein the second signal includes at least the transaction information.

[0009] In one example, the signal transceiver module described above includes: a radio frequency module and a microwave module; the radio frequency module is used to receive signals in the radio frequency band of the first signal, and the microwave module receives signals in the microwave frequency band of the first signal.

[0010] In one example, the roadside unit described above further includes a networking and positioning module; the networking and positioning module is connected to the main control module and is used to collect the location information of the roadside unit and upload it to the background system.

[0011] In one example, the roadside unit described above further includes a storage module; the storage module is connected to the main control module and is used to store at least the device identification information and the transaction information of the vehicle-mounted unit.

[0012] In one example, the storage module described above uses a TF card for storage.

[0013] In one example, the PSAM authentication module described above includes at least one PSAM card.

[0014] The present invention provides a toll collection system based on a roadside unit, comprising: a roadside unit as described above and a toll collection terminal connected to the roadside unit.

[0015] This implementation integrates the PSAM certification module into the RSU roadside unit, achieving a unified design for the RSU. This unified design simplifies the installation and operation of the equipment, eliminating the need for operators to deploy two separate devices, thus reducing installation difficulty and time costs. Simultaneously, the simplified operation lowers the skill requirements for operators; ordinary operators can become proficient after simple training, improving the ease of use and widespread adoption of the equipment. Furthermore, the unified design reduces the number of connection points between devices, lowering the probability of connection failures and improving system stability and reliability, providing strong support for the efficient operation of intelligent transportation systems. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a roadside unit according to an embodiment of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of a roadside unit according to another embodiment of the present invention. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of a roadside unit according to another embodiment of the present invention. Figure 3 . Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0020] One embodiment of this utility model relates to a roadside unit, such as... Figure 1As shown, the roadside unit in this embodiment includes: a main control module 1 and a signal transceiver module 2, a PSAM authentication module 3, a power supply module 4, and a communication module 5, all communicatively connected to the main control module 1. The signal transceiver module 2 receives a first signal from the vehicle-mounted unit and forwards it to the main control module 1. The PSAM authentication module 3 receives the first digital signal forwarded by the main control module, performs identity authentication on the vehicle-mounted unit based on the first digital signal, verifies the legitimacy of the vehicle-mounted unit, and feeds back the authentication and verification results to the main control module 1. The main control module 1 calculates transaction information based on the authentication and verification results and sends the transaction information to the communication module 5 and the vehicle-mounted unit. The power supply module 4 supplies power to the main control module 1, the signal transceiver module 2, the PSAM authentication module 3, and the communication module 5. The communication module 5 connects to the toll terminal and transmits the transaction information to the toll terminal.

[0021] Specifically, the roadside unit in this embodiment can be applied to highway toll stations or smart parking lots, and can achieve non-stop toll collection by communicating with the on-board unit of the vehicle within the signal coverage area of ​​the roadside unit.

[0022] The main control module 1 (Microcontroller Unit) is the core control component of the roadside unit. It is a chip that integrates a microprocessor core, memory, and peripheral interfaces. It is typically used to control the operation of embedded systems. Compared to traditional computer processors, MCUs are optimized in terms of power consumption, cost, and size, resulting in lower power consumption, lower cost, and smaller size. They offer advantages such as high portability, high integration, low power consumption, and ease of development. In this embodiment, the main control module 1 coordinates the operation of the entire roadside unit. When a vehicle enters the communication range of the roadside unit, the signal transceiver module 1 starts working. The signal transceiver module 2 is mainly responsible for receiving, demodulating, modulating, and transmitting signals. The signal transceiver module 1 receives the first signal sent by the vehicle-mounted unit. The first signal may contain various types of information, such as the device identification information of the vehicle-mounted unit and vehicle status information. This embodiment does not impose specific limitations on this. After receiving the first signal sent by the vehicle's vehicle-mounted unit, the signal transceiver module 2 demodulates the first signal into a first digital signal and forwards it to the main control module 1. When the main control module 1 receives the first digital signal forwarded by the signal transceiver module 2, it will forward the first digital signal to the PSAM authentication module 3, causing the PSAM authentication module 3 to start the identity authentication and legality verification process for the on-board unit of the current vehicle.

[0023] The PSAM authentication module 3 first extracts key data such as the device identification information of the on-board unit from the first digital signal. This data is compared with the legitimate device information pre-stored in the PSAM card. Through a preset encryption algorithm and verification mechanism, it determines whether the current on-board unit is legitimate. If the comparison results match and all verification indicators meet the requirements, the on-board unit is deemed legitimate; otherwise, it is deemed illegitimate, and the identification and verification results are promptly fed back to the main control module. In addition, during data transmission, the PSAM authentication module 3 rigorously authenticates all information transmitted between the roadside unit and the on-board unit, checking the integrity and authenticity of the information to prevent tampering or forgery. Simultaneously, the PSAM authentication module 3 uses encryption algorithms, such as a combination of symmetric and asymmetric encryption algorithms, to encrypt the information, ensuring confidentiality during transmission. Only authorized devices can access and process this encrypted information, effectively preventing information leakage and unauthorized access. It should be noted that the PSAM authentication module 3 includes at least one PSAM card; this embodiment does not specify a particular number of PSAM cards.

[0024] After the PSAM authentication module 3 provides the authentication and verification results, the main control module 1 accurately calculates the transaction information corresponding to the current vehicle unit, such as the charge amount and transaction time, based on the preset charging rules and algorithms. After obtaining the transaction information, it simultaneously sends it to the communication module 5 and the vehicle unit to ensure bidirectional synchronization. It should be noted that in this embodiment, the process of the main control module 1 sending the transaction information to the vehicle unit is achieved through the signal transceiver module 2. The signal transceiver module 2 sends a second signal to the vehicle unit, which includes at least the transaction information.

[0025] Communication module 5 connects to the toll terminal via an external interface, responsible for information transmission between the roadside unit and the toll terminal. The communication module supports multiple communication methods, such as Ethernet, serial communication, and wireless communication, allowing users to choose the appropriate method based on their application scenario. When the main control module 1 sends transaction information, communication module 5 encapsulates and encodes it, then sends it to the toll terminal according to the selected communication protocol. During transmission, the communication module monitors the communication status in real time, such as signal strength and bit error rate. If any communication anomalies are detected, retransmission and error correction measures are taken to ensure the integrity and accuracy of the transaction information. Simultaneously, the communication module also features data encryption and security authentication functions to prevent transaction information from being stolen or tampered with during transmission. After successfully transmitting the transaction information to the toll terminal, the toll terminal executes the transaction deduction based on the transaction information.

[0026] Power module 4 continuously supplies power to all modules, converting the externally input power into the stable voltage and current required by each module. Power module 4 obtains the external 24V DC power input through an external interface, filters and regulates it to remove noise and interference signals, ensuring the stability of the input voltage. Then, through an internal voltage conversion circuit, it converts the input voltage to the specific voltage required by different modules. For example, main control module 1 may require 3.3V, signal transceiver module 2 may require 5V, and PSAM certification module 3 and communication module 5 also have their own corresponding operating voltages. Power module 4 rationally allocates current according to the power requirements of each module, ensuring that each module receives sufficient power support. In addition, the power module also has overcurrent protection, overvoltage protection, and short-circuit protection functions. In case of abnormal conditions, it can promptly cut off the power supply to protect the modules from damage.

[0027] In this implementation, the roadside unit needs to be installed in a suitable location, such as near a toll station. The installation location should ensure that the signal transceiver module 2 can clearly receive and transmit signals, avoiding obstruction and interference from obstacles. Simultaneously, the ease of power supply and communication line access should be considered. Next, connect the power module 4, inserting an external 24V DC power supply into its input port. Ensure that the communication lines between modules are correctly connected, such as the data lines between the main control module 1 and the signal transceiver module 2, PSAM authentication module 3, and communication module 4 are securely connected. Initialize the main control module 1, configuring relevant parameters such as communication protocol, authentication rules, and toll standards. Insert the PSAM card into the PSAM authentication module to complete the authentication preparation.

[0028] In one example, such as Figure 2 As shown, the signal transceiver module 2 includes: an RF module 21 and a microwave module 22; wherein, the RF module 21 is used to receive signals in the RF frequency band of the first signal, and the microwave module 22 is used to receive signals in the microwave frequency band of the first signal.

[0029] Specifically, the radio frequency (RF) module 21 and the microwave module 22 are functionally similar, both used for wireless communication with the on-board unit (OBU) within the signal transceiver module 2. Generally, the antennas of the RF module 21 and the microwave module 22 receive wireless signals (the first signal) from the OBU. The RF module 21 receives signals in the radio frequency band, i.e., the RF band signals in the first signal, and the microwave module 22 receives signals in the microwave band, i.e., the microwave band signals in the first signal. The RF module 21 and the microwave module 22 demodulate their respective received signals, and the demodulated digital signals are transmitted to the main control module 1. The main control module 1 further processes the received data, such as parsing the data content and calling the PSAM authentication module for authentication, among other subsequent operations.

[0030] When data needs to be transmitted, the main control module 1 transmits the data to be sent (such as toll amount, vehicle access information, etc.) to the radio frequency (RF) module 21 and microwave module 22 in the form of signals, according to business requirements (such as sending toll instructions when a vehicle enters a toll area). The RF module 21 and microwave module 22 respectively process the signals, such as signal modulation, converting the digital signals into analog signals suitable for transmission over wireless channels. For the RF module 21, the signal is modulated onto the carrier signal of its operating frequency band (such as common radio frequency bands); the microwave module 22 modulates the data onto the carrier signal of the microwave frequency band. The modulated signals undergo power amplification to enhance signal strength and ensure effective transmission over a certain distance. The processed RF and microwave signals are then transmitted through their respective antennas to surrounding OBUs. In practical applications, depending on specific communication needs and the environment, the RF module 21 or microwave module 22 may be selected as the primary mode, or both may be used simultaneously to improve communication reliability and coverage. Regardless of their usage, the radio frequency module 21 and the microwave module 22 ultimately interact with the main control module 1 to jointly complete the wireless communication task with the OBU, enabling functions such as toll collection on highways or in parking lots.

[0031] It should be noted that in the ETC (Electronic Toll Collection) system, the OBU and RSU use a Dedicated Short Range Communication Standard Protocol (DSRC) for half-duplex communication. Because the 900 MHz and 2.45 GHz bands are close to mobile communication bands and have significant background noise interference, the international trend is towards using the 5.8 GHz system as the standard ETC system. For example, the United States uses 900 MHz or 5.8 GHz, Japan and Europe have designated 5.8 GHz as the ETC frequency band, and China has proposed allocating the 5.8 GHz band to short-range communication in the ITS field, including ETC systems, and has approved trials of ETC systems on the 5.8 GHz band. It is understood that in this embodiment, the radio frequency module 21 can use the 5.8 GHz radiation band for external communication, or it can use other frequency bands for communication. This embodiment does not impose specific restrictions on this, as long as signal transmission and reception can be achieved.

[0032] In one example, such as Figure 3 As shown, the roadside unit in this embodiment also includes a network and positioning module 6; the network and positioning module 6 is connected to the main control module 1 and is used to collect the location information of the roadside unit and upload it to the background system.

[0033] Specifically, the networking and positioning module 6 mainly consists of a Global Positioning System (GPS) module or a BeiDou positioning module and a network communication module. This module can collect real-time location information of roadside units, obtaining their latitude, longitude coordinates, and altitude through precise satellite positioning technology. The collected location information is then uploaded to the backend system via the network communication module. The backend system can then monitor and manage the roadside units in real time based on this location information. For example, when a roadside unit malfunctions or malfunctions, the backend system can quickly dispatch maintenance personnel based on its location information. Simultaneously, the location information can also be used for intelligent transportation data analysis, such as traffic flow statistics and road congestion monitoring.

[0034] In one example, such as Figure 3 As shown, the roadside unit in this embodiment also includes a storage module 7; the storage module 7 is connected to the main control module 1 and is used to store at least the device identification information and transaction information of the vehicle-mounted unit.

[0035] Specifically, storage module 7 is connected to main control module 1 and uses a TF card as the storage medium. Storage module 7 is used to store at least the device identification information and transaction information of the on-board unit. When the roadside unit communicates and transacts with the on-board unit, the storage module promptly records the relevant device identification information and transaction information, forming detailed transaction records. These records can serve as important evidence for subsequent queries and audits. For example, in the event of a toll dispute, the authenticity and accuracy of the transaction can be verified by querying the transaction records in storage module 7. Simultaneously, the storage module can also classify and organize this data for convenient management and use by users.

[0036] Compared to related technologies, this implementation integrates the PSAM certification module into the RSU roadside unit, achieving a unified design for the RSU roadside unit. This unified design simplifies the installation and operation of the equipment, eliminating the need for operators to deploy two separate devices, thus reducing installation difficulty and time costs. Simultaneously, the simplified operation lowers the skill requirements for operators; ordinary operators can become proficient after simple training, improving the ease of use and widespread adoption of the equipment. Furthermore, the unified design reduces the number of connection points between devices, lowering the probability of connection failures and improving system stability and reliability, providing strong support for the efficient operation of the intelligent transportation system.

[0037] This utility model embodiment also provides a toll collection system based on a roadside unit, including: a roadside unit as described in any of the above embodiments and a toll collection terminal connected to the roadside unit.

[0038] Specifically, the toll collection terminal is the core processing device of the entire toll collection system. It receives transaction information transmitted from the roadside units, processes the toll collection, and interacts with relevant billing systems. The toll collection terminal performs detailed analysis and processing of the transaction information, calculates the final toll amount according to preset toll rules, and settles the payment with the user's account. Simultaneously, the toll collection terminal uploads transaction records to the back-end management system for statistical analysis. A stable and reliable connection is established between the roadside units and the toll collection terminal via communication module 4, ensuring accurate and timely transmission of transaction information and achieving automated and information-based toll collection management.

[0039] It is not difficult to see that this embodiment is a toll system embodiment corresponding to the previous embodiments. The various details of the roadside unit in the previous embodiments are still applicable in this embodiment, and will not be repeated here.

[0040] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A roadside unit, comprising: include: The main control module, and a signal transceiver module, a PSAM authentication module, a power supply module, and a communication module that are communicatively connected to the main control module; The signal transceiver module is used to receive the first signal from the vehicle unit and forward it to the main control module. The PSAM authentication module is used to receive the first digital signal forwarded by the main control module, perform identity authentication on the vehicle unit based on the first digital signal, verify the legitimacy of the vehicle unit, and feed back the authentication result and verification result to the main control module; the PSAM authentication module includes at least one PSAM card; The main control module is used to calculate transaction information based on the identification result and the verification result, and send the transaction information to the communication module and the vehicle unit; The power module is used to supply power to the main control module, the signal transceiver module, the PSAM authentication module, and the communication module; The communication module is connected to the payment terminal and is used to transmit the transaction information to the payment terminal.

2. The road-side unit of claim 1, wherein, The first signal includes at least the device identification information of the vehicle-mounted unit.

3. The roadside unit according to claim 1, characterized in that, The signal transceiver module is also used to demodulate the first signal into the first digital signal and forward it to the main control module.

4. The roadside unit according to claim 1, characterized in that, The signal transceiver module is further configured to send a second signal to the vehicle-mounted unit; wherein the second signal includes at least the transaction information.

5. The roadside unit according to claim 1, characterized in that, The signal transceiver module includes: a radio frequency module and a microwave module; The radio frequency module is used to receive signals in the radio frequency band of the first signal, and the microwave module is used to receive signals in the microwave frequency band of the first signal.

6. The roadside unit according to claim 1, characterized in that, Also includes: Networking and positioning module; The networking and positioning module is connected to the main control module and is used to collect the location information of the roadside units and upload it to the background system.

7. The roadside unit according to claim 2, characterized in that, Also includes: Storage module; The storage module is connected to the main control module and is used to store at least the device identification information and the transaction information of the vehicle unit.

8. The roadside unit according to claim 7, characterized in that, The storage module uses a TF card for storage.

9. A toll collection system based on roadside units, characterized in that, include: The roadside unit as described in any one of claims 1-8 and the toll collection terminal connected to the roadside unit.

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