Technical Scheme List

Roadside Units (RSUs) and On-Board Units (OBUs) are important components in intelligent transportation systems. An RSU is a device installed on the roadside in the ETC system, which uses short-range communication technology to communicate with the OBU installed in the vehicle. The OBU is a small device mounted inside the vehicle that stores basic vehicle information and can interact with the RSU to enable automatic toll deduction without stopping.To ensure the stable operation and efficient performance of the ETC system, it is necessary to test RSU and OBU products using professional testing solutions. This article will introduce a testing solution provided by Beijing Duwei Technology Co., Ltd. The entire system consists of core control software ETC Runsys and hardware equipment, which can meet the relevant testing requirements for RSUs and OBUs.

This article introduces a testing software called ProEye provided by Beijing Doewe Technology Co., Ltd. This software can assist users in analyzing ETC communication processes, thereby improving testing efficiency.

This article will introduce the video signal formats and video channel testing indicators based on the content of transmission channel indicators for closed-circuit television monitoring systems specified in the JTG 2182-2020 standard.

The main testing content of this plan is to test items 20 to 25 in the measured items of ETC gantry system in Table 6.4.2 under 6.4 ETC Gantry System of the standard "JTG 2182-2020 Standards for Quality Inspection and Assessment of Highway Engineering - Volume II: Mechanical and Electrical Engineering". These items include communication area, RSU working signal strength, RSU working frequency, RSU occupied bandwidth, RSU preamble, and RSU communication process.

In response to the JTG 2182-2020 standard, our company has launched an automated testing system solution that fully complies with the content related to closed-circuit television testing specified in this standard. It supports all test image signal generation functions that meet the standard requirements, as well as various video transmission quality testing functions.The closed-circuit television monitoring system is an indispensable and important part of highway traffic. It is responsible for uploading real-time road traffic conditions to the road monitoring and command center, so as to timely understand the situation of various regions and ensure timely response when accidents occur. The corresponding video monitoring link, as the carrier for transmitting video signals, affects various aspects such as video quality, signal transmission speed, and transmission stability. Therefore, it is particularly important to test, evaluate, and conduct regular inspections on the transmission quality of the link.

Based on the testing ideas in the standard "JTG 3520-2021 Testing Specifications for Highway Mechanical and Electrical Engineering", this article introduces the specific operation methods for testing in actual environments, targeting some of the test items in "JTG 2182-2020 Standards for Quality Inspection and Assessment of Highway Engineering - Volume II: Mechanical and Electrical Engineering", including communication area, RSU working signal strength, RSU working frequency, RSU occupied bandwidth, RSU preamble, and RSU communication process.

The General Office of the Ministry of Transport officially issued Document Jiao Ban An Jian Han 〔2024〕 No. 1432 on August 1st. Its core themes include: first, updating and optimizing some testing parameters; second, further refining and clarifying the content of expert review. This article interprets the differences between the old and new standards in terms of the closed-circuit monitoring video transmission system and the ETC gantry system in transportation engineering projects from the above two aspects, and will put forward solutions for the new standards.

This article elaborates on the basic concepts of YUV and YCbCr and their relationship, and introduces the specific storage forms of four main sampling formats from aspects such as pixels, stored code streams, and mapped pixel points.

This solution is specifically designed to meet the requirements of the standards *JTG 2182-2020* and *JTG 3520-2021*. Doewe Company has developed a set of ETC gantry testing system named eEye, with high-precision handheld instruments selected as the core testing equipment. It ensures testing accuracy while featuring high portability, and when combined with dedicated custom analysis software, makes the testing process simpler and more efficient.The testing content of the ETC gantry system by Beijing Doewe Technology Co., Ltd. mainly covers items 20 to 25 in the measured items of the ETC gantry system listed in Table 6.4.2 under 6.4 ETC Gantry System of the standard *JTG 2182-2020 Standards for Quality Inspection and Assessment of Highway Engineering - Volume II: Mechanical and Electrical Engineering*. These items include communication area, RSU working signal strength, RSU working frequency, RSU occupied bandwidth, RSU preamble, and RSU communication process.The ETC gantry testing system eEye, with its portability, simplified operation procedures, signal recording and re-analysis functions, as well as professional and intuitive test result analysis software, has brought great convenience and efficiency improvement to the testing work of ETC gantry systems. These advantages make the testing work more flexible, efficient and accurate, providing a strong guarantee for the stable operation of the ETC system.

This article provides a detailed introduction to Dedicated Short-Range Communication (DSRC) technology from seven aspects: system overview, composition, characteristics, protocol overview, protocol functions and structure, comparison with existing standards, and the application of DSRC technology in the field of Intelligent Transportation Systems (ITS).