Precision Time Protocol

About: Precision Time Protocol is a research topic. Over the lifetime, 604 publications have been published within this topic receiving 6006 citations. The topic is also known as: PTP & IEEE 1588.

Network-Based Timing, Genlock and Time Code Using Precision Time Protocol

Abstract: Broadcast genlock is currently achieved using an analog video signal as the reference. As facilities progress toward new video formats, and also become multiformat, the use of a single analog video reference becomes progressively less appropriate. Genlock systems need to translate from the reference to the desired production format, involving complex ratios of frequency and timing. There is also no standard for the phase relationship between different video formats, although this may be important in multiformat facilities. IEEE 1588 1 supports the transport of time with a high degree of accuracy, and it allows that time to be defined relative to an epoch. Using this information, any video or audio format's timing can be generated reliably and consistently. IEEE 1588 allows for each application to define its own profile. SMPTE has defined a profile for broadcast facility use. This paper explores the choices involved in the profile and ways in which it can be applied to practical media synchronization applications.

Precise Time and Data Transfer Test Facility Using Optical Fiber Links in S-band and C-band

Abstract: We perform the results implemented via time and data transfer using single-mode optical fiber. We use White Rabbit device which is an implementation of Precision Time Protocol (PTP) intended for the synchronization with sub-nanosecond precision. Our work briefs with the implementation of time transfer both in S-band and C-band. The work more focus on every timing system needs a primary time source which serves as a reference for all the nodes. In most sources the reference clock must fulfill rigorous requirements for the long-term stability. In this work atomic clock has been chosen as primary clock source.

Research on Synchronization Technology Based on IEEE1588 Protocol

Abstract: With the rapid development of network technology, Distributed test system is widely applied in the test field, and clock synchronization in the system is the key issues in distributed test system. Meanwhile, with the development of testing techniques, distributed test has higher requirement for precision of the synchronization. Since the IEEE1588 protocol promulgated, it provides a feasible way to realize the requirement. This paper firstly analyzes the basic principle of IEEE1588, and then puts forward a scheme to implement IEEE1588 by using hardware timestamp. Finally, optimizes the method of PTP (precision time protocol) synchronization adjustment and builds experimental platform to verify the effect of optimization. Experiments prove that the scheme is feasible, and the clock synchronization precision can achieve a level of sub-microsecond.

Study and Implementation of Ethernet Based Synchronization in Distributed Data Acquisition System

Abstract: In the recent past, acoustic detection and ranging techniques has become more advanced and sophisticated. In general, the sonar systems consist of distributed data acquisition systems. For accurate ranging these systems needs to be synchronized in time. This can be achieved by custom synchronization techniques or through standard mechanisms like IEEE 1588 PTP (precision time protocol). This project outlines the implementation of a synchronization mechanism with minimal hardware support. The main objective is that it will minimize custom hardware requirements. Using a standard hardware interface like Ethernet will rule out any signal integrity related issues at the physical layer. The accuracy of synchronization across the systems has to be measured and tuned. The implementation will be done on the Microzed board using the Vivado 2018.1.