The security of data throughout its entire life cycle has become the most urgent and fundamental security issue in the digital economy era. With the continuous expansion and deepening of vehicle-infrastructure-cloud integration (VICI), data among the vehicle, infrastructure, and cloud are interconnected, leading to a constant extension in the scope of automotive data. Focusing solely on vehicle-end data is no longer sufficient to meet the developmental needs of intelligent connected vehicles. Considering data security from the perspective of VICI holds significant importance for ensuring the safety of the entire life cycle of intelligent connected vehicle data. In this context, this paper focuses on data security for VICI, analyzes the scope and characteristics of the data, explores the key challenges, and elaborates on the application of data security technology for VICI. Building upon this, the paper proposes DSA-VICI and conducts an analysis of the development trends in data security for VICI.

C-V2X, as an end-to-end wireless communication network for intelligent transportation system, may lead to degradation of its communication quality in the case of high vehicle density, and the large-scale field test provides a test environment for its possible situation. whether the communication performance of C-V2X system in the large-scale field test can meet the technical requirements is the premise of whether C-V2X system can be applied and promoted in China. At this stage, the data after the large-scale test is only analyzed in terms of time delay and packet error rate(PER), and only the analysis of these two indicators is not able to judge whether the equipment meets the technical indicators in the large-scale scenario. In this paper, we propose an analysis and evaluation scheme for the data after the communication performance of vehicle devices in large-scale tests, add the evaluation indexes of interval delay jitter and throughput, and propose some improvement schemes for the existing test data saving format.

Intelligent connected vehicles exchange real-time driving information via wireless communication. To ensure corresponding application performance, field test is needed. Obviously, V2V communication performance is influenced by several factors, such as vehicle density, road factor, weather, etc., and bring great challenge for test scheme design, which is considered as a serious hinder of V2X market process. In this paper, a density-oriented test scheme is proposed. Both communication performance and run-time application performance tests are considered, and both software and hardware architectures are designed. Moreover, the interfaces and a control procedure are given. Then the test system is deployed in test field while tests are done to verify the effectiveness of proposed test scheme design.

The complex traffic environment of the intersection region makes traffic accidents occur frequently in this section. Intelligent network vehicles can give early warning of possible dangers through communication between vehicles and other traffic participants, so as to reduce the occurrence of traffic accidents. At present, many automobile enterprises are studying the landing application of vehicle to everything (V2X). This paper focuses on the application requirements of intersection collision warning (ICW) to V2X. Testing is an integral part of vehicle internet and can ensure safe and effective use of vehicle internet.In this paper, we describe in detail the testing process and results of communications performance of vehicle-to-vehicle (V2V) at an obstructed intersection in a closed test field where there are a lot of cars as a background. In addition, we have proposed a message forwarding mechanism based on vehicle to vehicle to infrastructure to vehicle (V2I2V), and the test results show that V2I2V performs better than V2V at an intersection with obstacles.

In the communication of devices based on C-V2X, packet error rate (PER) is an important metric to measure the communication performance of a device. As for the packet loss phenomenon, we usually focus on why the receiver did not successfully receive the message, and rarely focus on whether the transmitter actually sent the message.We usually consider the messages sending situation recorded by the application layer as the messages that should be received by the receiver (packets that are known to be not sent by the application layer due to application layer congestion control, etc., are not in the scope of this paper). However, in the actual communication process, there are some discrepancies between the real packets sent from the bottom layer and the application layer's records. In the 2020 C-V2X Large-scale Pilot Demonstration, when we analyzed the results and calculated the received PER of the devices, we were confused whether some of the devices did not send all the packets successfully. Based on this confusion, we defined the concept of transmitter traffic to represent the actual packet sending situation of the device. We designed a method to calculate transmitter traffic by using the "large-scale" data available, and conducted statistics on the transmitter traffic of more than 40 terminal companies, more than 10 chip module companies, and more than 50 participating devices. We analyzed the statistical results, and analyzed the possible reasons for the unsuccessful transmitter traffic.

Protocol conformance test plays a necessary and important role in guaranteeing that Long Term Evolution-Vehicle to Everything (LTE-V2X) devices to meet the standards and achieve interoperability. Based on in-depth analyzing 3rd Generation Partnership Project (3GPP) release 14 and China LTE-V2X standards, in this paper, a LTE-V2X Conformance Testing Scheme is designed, while corresponding test process and message sets are defined. Test suite are designed according to message layer and network layer requirements. Finally, a test tool, VeTest, is proposed to realize conformance test. The work is significance for promoting the LTE-V2X standardization and interoperability.