Topic
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.
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TL;DR: Modifications of the timing synchronization system (TSS) are concentrates on the modifications of the TSS, the details about the system architecture and test results will be described in this manuscript.
7 citations
Patent•
21 Nov 2013TL;DR: In this article, the authors use precise timing relationships between nodes in computer networks to generate mappings depicting the physical arrangement or ordering of nodes in the computer networks, and the technical effect is by tracking the timing delays between nodes as observed by an individual node, and collecting such information together for subsequent processing.
Abstract: Aspects of the present invention provide systems and methods using precise timing relationships between nodes in computer networks to generate mappings depicting the physical arrangement or ordering of nodes in the computer networks. The technical effect is by tracking the timing delays between nodes as observed by an individual node, and collecting such information together for subsequent processing, nodes may receive and/or construct an entire physical network topology using an algorithm accordingly.
7 citations
Patent•
05 Jul 2012
TL;DR: In this paper, a method and a device for monitoring time synchronization, which relate to the communications technology, so as to solve the problem in the prior art that time synchronization cannot be monitored in real time.
Abstract: Disclosed are a method and a device for monitoring time synchronization, which relate to the communications technology, so as to solve the problem in the prior art that time synchronization cannot be monitored in real time. The technical solution provided in an embodiment of the present invention comprises: receiving a precision time protocol 1588v2 time signal, and acquiring a precision time protocol 1588v2 time stamp of the precision time protocol 1588v2 time signal; performing frequency locking and phase locking on the precision time protocol 1588v2 time stamp, so as to obtain a precision time protocol 1588v2 pulse per second (PPS) of the precision time protocol 1588v2 time signal; performing phase detection on the precision time protocol 1588v2 PPS and a satellite PPS of a satellite signal, so as to obtain a decimal part of a precision time protocol 1588v2 time deviation of a base station; and reporting the decimal part of the precision time protocol 1588v2 time deviation. The embodiments of the present invention may be applied in industrial automation, measurement, and communications procedures.
7 citations
15 Jun 2011
TL;DR: A transparent Time Gateway that is able to interface SNTP devices with a PTP synchronization domain (PTP devices and PTP switches) is described and preliminary experimental results show the feasibility of the proposed architecture.
Abstract: This paper deals with time synchronization in mixed network infrastructures for automation of industrial and electric plants, where old devices, which retrieve time information with the well-known NTP, must coexist with new IEEE1588 PTP compliant devices. Since PTP and NTP use very different time representations and synchronization strategies, an easy integration is quite difficult and requires additional hardware. The paper describes a transparent Time Gateway that is able to interface SNTP devices with a PTP synchronization domain (PTP devices and PTP switches). The Time Gateway has been realized with an embedded system based on an FPGA with a soft processor and an open source operating system. Preliminary experimental results show the feasibility of the proposed architecture, even if some improvements may be needed to match the time synchronization accuracy required by the legacy SNTP devices.
7 citations
Patent•
14 Aug 2013
TL;DR: In this paper, a clock synchronization method based on a PTP (Precision Time Protocol) and a reflective memory network relates to the technical field of virtual simulation tests is provided.
Abstract: A clock synchronization method based on a PTP (Precision Time Protocol) and a reflective memory network relates to the technical field of virtual simulation tests. According to the invention, the problem of the existing communication method that the clock synchronization precision is low due to unstable network can be solved, and the clock synchronization method based on the PTP and the reflective memory network is provided. The method is applicable to the clock synchronization between a host and node equipment in a virtual simulation experiment. A reflective memory card is inserted into each of the host and the node equipment respectively, and the data transmission is carried out by a fiber between the reflective memory cards in the host and the node equipment. The method comprises the following steps: a main clock and a slave clock are constructed; an offset correction phase is carried out; the offset correction is repeated; an offset value is obtained by a data processing algorithm; an optimal fitting value is obtained; a delay correction phase is carried out; the relay correction is repeated; a delay value is obtained by the data processing algorithm; and an optimal fitting value is obtained to complete the synchronization of the main clock and the slave clock. The method is suitable for virtual simulation tests.
7 citations