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.

Implementation of FPGA-Based Network Synchronization Using IEEE 1588 Precision Time Protocol (PTP)

Abstract: Synchronization is an essential prerequisite for all wired and wireless networks to operate. It is fundamental requirement for data integrity, and without it data will be affected by errors and networks will have outages. The IEEE 1588 Precision Time Protocol (PTP) enables precise synchronization of clocks via packet networks with accuracy down to the nanoseconds range. PTP-based solution can be used in various heterogeneous systems like industrial automation, RADAR, Telecom networks. FPGA-based implementation of PTP eliminates Ethernet latency and jitter issues through hardware Timestamping. It gives precise and accurate synchronization in comparison with Operating System-based Timestamping solutions. Accuracy in the range of 10–100 ns is achievable using FPGA-based platform. This paper explains basic mechanism of PTP protocol and advantages of FPGA-based platform for its implementation. It provides detail implementation of PTP on FPGA platform, design flow, testing methodology and its results.

Method, device and system for recognizing precision time protocol massages

Abstract: The embodiment of the present invention discloses a method, a device and a system for recognizing precision time protocol massages, which relates to the field of communication. The present invention is invented for shortening the time of network equipment recognizing precision time protocol massages. The method for recognizing precision time protocol massages is applied to a multi-label transmitting network, which comprises the following steps: the precision time protocol massages are captured; a label retaining layer carrying recognizing labels is added in a label zone of the precision time protocol massages; and the precision time protocol massages are transmitted. Another method for recognizing the precision time protocol massages is applied to a multi-label protocol transmitting network, which comprises the following steps: massages carrying the label retaining layer in the label zone are captured; the precision time protocol massages are recognized through recognizing labels in the retaining label layer; and the precision time protocol massages are transmitted. The present invention can be applied to transmit the precision time protocol massages.

Analysis of Precision Time Protocol (PTP) Locking Time on Non-PTP Networks for Generator Locking over IP

Abstract: With the integration of Internet Protocol (IP)-based systems into broadcast architectures generator-locking devices need to redesigned for this new environment. Within the SMPTE 33TS Technology Committee, an IEEE (Institute of Electrical and Electronics Engineers) 1588 profile suited for the production industry is under definition. The Precision Time Protocol (PTP) has been widely adopted in other industries to synchronize nodes in asynchronous networks such as Ethernet. If PTP is used for synchronizing broadcasting equipment replacing systems like color black, locking times of 5 sec are required to facilitate frequent changes in the network topology and offer the same availability as existing analog systems. After describing ways to obtain short lock times, measurement results are presented for a 3-hop network. Different classes of PTP-unaware components were used ranging from older-generation desktop devices to current generation data center units with line rate switching capabilities. The lock time was measured using different PTP message rates as well as default and expedited forwarding for PTP traffic while applying various network load conditions.

1μs-conform line length of the Transparent Clock Mechanism defined by the Precision Time Protocol (PTP Version 2)

Abstract: This paper quantifies the ldquo1 mus-conformrdquo line-length of the Transparent Clock Mechanism of peer-to-peer Precision Time Protocol (PTP Version 2), i.e. the number of elements that stay within the plusmn1 mus sync error tolerance, for crystal oscillator output frequencies of 100 MHz, 250 MHz, 500 MHz and 1 GHz, i.e. for time quantization errors of 10 ns, 4 ns, 2 ns and 1 ns.

Precision timing in TDMA-based Wireless Sensor Network through IEEE 1588 standard

Abstract: Abstrac t This paper proposes an energy-efficient time synchronization scheme for Wireless Sensor Networks (WSNs) based on the IEEE 1588 standard. Although a number of methods have been studied for time synchronization of WSNs, some applications require high precision time synchronization with very low power consumption. This paper presents a reduced implementation of IEEE 1588 precision time protocol (PTP) for WSNs. Within the proposed synchronization approach, a sensor node is synchronized using the timing message generated by a master node synchronized with GPS. This paper also presents experiments to evaluate the performance of the precision time synchronization of a slave-master pair of sensor nodes.