Qichen Xu
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Qichen Xu has a total of 4 co-authors. Here are the top co-authors by number of shared publications:
- Jie Chen
Key Laboratory of Internet and industrial integration and innovation(CAICT), MIIT, China Academy of Information and Communications Technology, China
1 shared publication - Meihui Liu
School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing, China
1 shared publication - Renhe Yan
Key Laboratory of Internet and industrial integration and innovation(CAICT), MIIT, China Academy of Information and Communications Technology, China
1 shared publication - Shihui Duan
Institute of Technology and Standards Research, China Academy of Information and Communications Technology, Beijing, China
1 shared publication
Latest Publications
- Open Access
- 6 December 2023
- Published by Association for Computing Machinery (ACM)
- p. 300-305
Comparison and Testing of Time Synchronization Accuracy between IEEE 1588v2 and IEEE 802.1AS
This paper presents a comprehensive analysis of IEEE 1588v2 (Precision Time Protocol version 2, PTPv2) and IEEE 802.1AS (Generalized Precision Time Protocol, gPTP), two major protocols used for high-precision time synchronization in industrial networks. We first outline the technical principles of PTPv2 and gPTP, and then identify several common factors that affect their synchronization accuracy, including asymmetric transmission delay, path delay, timestamp sampling points, clock frequency and resolution, measurement methods for path delay, clock drift and jitter, control algorithms, and sync message transmission frequency. Through a comparative analysis, we highlight key differences between these two protocols and discuss their implications for synchronization accuracy, fault tolerance, concurrency, and scalability. We also introduce a time synchronization testing environment that was built using existing laboratory equipment and elaborate on its construction and testing setup. The paper concludes with a thorough experimental comparison of PTPv2 and gPTP, offering valuable insights into their performance in real-world scenarios. The results of our study can guide network engineers in choosing the most suitable time synchronization protocol for their specific industry requirements.
- 6 December 2023
- Published by Association for Computing Machinery (ACM)
- p. 300-305
Open AccessComparison and Testing of Time Synchronization Accuracy between IEEE 1588v2 and IEEE 802.1AS
This paper presents a comprehensive analysis of IEEE 1588v2 (Precision Time Protocol version 2, PTPv2) and IEEE 802.1AS (Generalized Precision Time Protocol, gPTP), two major protocols used for high-precision time synchronization in industrial networks. We first outline the technical principles of PTPv2 and gPTP, and then identify several common factors that affect their synchronization accuracy, including asymmetric transmission delay, path delay, timestamp sampling points, clock frequency and resolution, measurement methods for path delay, clock drift and jitter, control algorithms, and sync message transmission frequency. Through a comparative analysis, we highlight key differences between these two protocols and discuss their implications for synchronization accuracy, fault tolerance, concurrency, and scalability. We also introduce a time synchronization testing environment that was built using existing laboratory equipment and elaborate on its construction and testing setup. The paper concludes with a thorough experimental comparison of PTPv2 and gPTP, offering valuable insights into their performance in real-world scenarios. The results of our study can guide network engineers in choosing the most suitable time synchronization protocol for their specific industry requirements.