Monitoring and Analysis of SMPTE ST 2059-2 PTP Networks and Media Devices

Metadata

Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: SMPTE Mot. Imag. J
Volume: 130, No. 6, pp. 10–19
Abstract: As All-IP studios leveraging the SMPTE ST 2110 document suite gain traction, one of the fundamental pillars upon which such systems rely is an accurate and reliable time transfer protocol. SMPTE ST 2059 standardized such a model based on the IEEE 1588 Precision Time Protocol (PTP). Every element, whether it be network or media devices, impacts the overall time transfer accuracy. This impacts the timing of the ST 2110 media streams that are generated or received by the media nodes. While PTP does provide fault tolerance capabilities, performance degradation of time transfer is not always well understood. This can significantly impact operations in live networks, it being due to a sudden event or a degradation over time. Therefore, an overarching view of the end-to-end timing system including backup, standby, and network devices is required. Monitoring of such capabilities should be common to all devices, whenever possible, including different means to verify in-band and out-of-band measurements as to how devices are performing, with respect to time transfer. Combined with historical archiving of the monitored data, this provides the framework for tracking and correlating possible events. This paper describes the different monitoring capabilities, their advantages and weaknesses, and the value they provide to the monitored datasets. It further focuses on the means to make the process uniform across all monitored devices to ensure consistency in the collected data. Finally, we discuss the ongoing efforts in SMPTE and other standardization bodies around PTP monitoring, the common trends, expected outcomes, and how these will contribute to streamlining time transfer monitoring, supervision, and analysis.
Publication Date: 2021-07-01
DOI: 10.5594/JMI.2021.3082992
ISSN: Print: 1545-0279 | Electronic: 2160-2492
Link: https://doi.org/10.5594/JMI.2021.3082992
Author(s): Thomas Kernen
bio
Thomas Kernen is a senior staff architect at NVIDIA, Zürich, Switzerland. His main area of focus is defining architectures for transforming the broadcast industry to an All-IP infrastructure. He is a SMPTE Fellow, serves as the co-chair of SMPTE’s 32NF committee, and is a member of the IEEE Communications and Broadcast Societies. He has served for many years as the editor of the Digital Video Broadcasting (DVB) TS 101 154 “Specification for the use of Video and Audio Coding in Broadcasting Applications based on the MPEG-2 Transport Stream” supported by millions of digital receivers worldwide. Additionally, he has authored more than 20 publications in leading journals and holds multiple patents that cover both network and video coding optimizations for media transport and delivery. He is a frequent speaker at leading industry events both in broadcast and networking industries. Prior to joining Mellanox (acquired by NVIDIA), he spent more than 20 years in the IP industry including driving Cisco’s entry into live media production, co-founding internet service providers, telecom carriers, and architecting fiber to the home networks.
Nikolaus Kerö
bio
Nikolaus Kerö received a master’s degree in communication engineering with distinction from the Vienna University of Technology, Vienna, Austria. After graduating, he led the ASIC design division at the university’s Institute of Industrial Electronics, successfully managing numerous research projects and industry collaborations. His research activities centered on distributed systems design, especially highly accurate and fault-tolerant clock synchronization. In 2001, he co-founded Oregano Systems Design & Consulting Ltd., Vienna, as a university spin-off. While offering embedded systems design services to customers, Oregano transferred the group’s research results into a complete product suite for highly accurate clock synchronization under the brand name syn1588, for which he manages both development and marketing. He is an active member of the IEEE 1588 standardization committee and the SMPTE 32NF standards group and holds frequent seminars on clock synchronization for both industry and academia.
Keyword(s): Monitoring, PTP, ST 2059-2, Time & Sync
Copyright: © 2021 SMPTE

Bibliographic Reference(s)

Optimizing Large Media Networks for Highly Accurate Time Transfer via PTP [Active]
Enhanced Redundancy of ST 2059-2 Time Transfer Over ST 2022-7 Redundant Networks [Active]
IEEE.STD1588.2008 — IEEE Std 1588-2008, IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, 2008 EXTERNAL
IEEE.STD1588.2019 — Institute of Electrical and Electronics Engineers (IEEE), IEEE 1588:2019, “IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems.” EXTERNAL
“Optimize Network Synchronization with the NetSync Monitor,” Meinberg. Accessed: Jun. 2, 2021. [Online]. Available: ht t ps://w w w.mei nbergg lobal.com /eng lish /news/opt i m i ze -network-synchronization-with-the-netsync-monitor.htm EXTERNAL
Joint IEEE 802 and International Telecommunications Union – Telecommunication (ITU-T) SG15 Workshop, “Building Tomorrow’s Networks”—IEEE 802.1 YANG Data Modeling Overview. Accessed: Jun. 2, 2021. [Online]. Available: https://www.itu.int/en/ITU-T/Workshops-and-Seminars/20180127/Documents/2. Marc Holness.pdf EXTERNAL
N. Kerö, T. Kernen, and T. Müller, “Efficient Monitoring of ST 2059-2 Based Time Transfer Performance,” SMPTE Mot. Imag. J., 126(4): 1–8, May–Jun. 2017. EXTERNAL
Skyline Dataminer. Accessed: Jun. 2, 2021. [Online]. Available: https://skyline.be/dataminer EXTERNAL
“IEEE Standard for Ethernet—YANG Data Model Definitions,” IEEE Standard 802.3.2-2019, pp. 1–155, 21 Jun. 2019. EXTERNAL
“Experimental YANG Model for IEEE 1588.” Accessed: Jun. 2, 2021. [Online]. Available: https://github.com/YangModels/yang/blob/master/experimental/ieee/1588/ni-ieee1588-ptp.yang EXTERNAL
Joint IEEE 802 and International Telecommunication Union – Telecommunication (ITU-T) Study Group 15 Workshop, “IEEE 1588 YANG Update.” Accessed: Jun. 2, 2021. [Online]. Available: https://www.itu.int/en/ITU-T/ Workshops-and-Seminars/20 2001/Documents/RodneyCummings_s4p2.pdf EXTERNAL
Grafana. Accessed: Jun. 2, 2021. [Online]. Available: https://grafana.com/ EXTERNAL
SMPTE Public Committee Drafts. Accessed: Jun. 2, 2021. [Online]. Available: https://www.smpte.org/public-committee-drafts EXTERNAL
MiFID II. Accessed: Jun. 2, 2021. [Online]. Available: https://www.esma.europa.eu/databases-library/interactive-single-rulebook/mifid-ii EXTERNAL
N. Kerö, T. Kernen, T. Müller, and M. Deniaud, “Analysis of Lock Times of PTP Slave Under Varying Network Load Conditions Using Class Based Queuing,” Proc. IEEE Int. Symp. Precision Clock Synchronization for Measurement, Control and Communication (ISPCS), Lemgo, Germany, pp. 18–23, 2013. EXTERNAL
Accessed: Jun. 2, 2021. [Online]. Available: https://sourceforge.net/p/linuxptp/mailman/message/36174968/ EXTERNAL
N. Kerö, A. Puhm, T. Kernen, and A. Mroczkowski, “Performance and Reliability Aspects of Clock Synchronization Techniques for Industrial Automation,” Proc. IEEE, 107(6): 1011– 1026, Jun. 2019. EXTERNAL
Picture taken from Accessed: Jun. 2, 2021. [Online]. Available: https://en.wikipedia.org/wiki/Simple_Network_Management_Protocol#/media/Datei:SNMP_v1.01.pngAn experimental draft version of the IEEE 1588 YANG model is publicly available.31 Currently under development, the SMPTE 2059-15 Recommended Practice is, therefore, defining a YANG data model that encompasses all relevant aspects of time transfer monitoring ranging from the reference clock input such as GNSS, the PTP time transfer itself across different PTP-aware devices to the end node recovering the transmitted time. The results of this work are available to the public via a SMPTE Public Committee Draft (PCD).32 By providing this common definition of the data fields and their respective value ranges, this enables devices collecting those values, either via a pull or a push method, to remove uncertainty in the collected information, and simplify developing monitoring tools that support time transfer capabilities. EXTERNAL
Representational State Transfer (REST). Accessed: Jun. 2, 2021. [Online]. Available: https://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm EXTERNAL
“Mellanox IEEE 1588 PTP Design Guide.” Accessed: Jun. 2, 2021. [Online]. Available: https://www.mellanox.com/files/doc-2020/ieee-1588-precision-time-protocol-design-guide.pdf EXTERNAL
IETF RFC 1157 [Active*]
IETF RFC 4313 [Active*]
IETF RFC 8173 [Active*]
IETF RFC 8259 [Active*]
IETF RFC 8334 [Active*]
IETF RFC 8575 [Active*]
SMPTE AG 16 [Active, Versionless]
SMPTE ST 2022-7:2013 [Superseded]
SMPTE ST 2059-2:2015 [Superseded]
SMPTE ST 2110-10:2017 [Superseded]
SMPTE ST 2110-20:2017 [Superseded]
SMPTE ST 2110-21:2017 [Superseded]
SMPTE ST 2110-30:2017 [Superseded]
SMPTE ST 2110-40:2018 [Superseded]

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Thomas Kernen and Nikolaus Kerö; Monitoring and Analysis of SMPTE ST 2059-2 PTP Networks and Media Devices, SMPTE Motion Imaging Journal ( Volume: 130, Issue: 6, July 2021); SMPTE, 2021. Available at https://doi.org/10.5594/JMI.2021.3082992

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Thomas Kernen and Nikolaus Kerö; Monitoring and Analysis of SMPTE ST 2059-2 PTP Networks and Media Devices, SMPTE Motion Imaging Journal ( Volume: 130, Issue: 6, July 2021); SMPTE, 2021. Available at https://doi.org/10.5594/JMI.2021.3082992

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<span class="citation">Thomas Kernen and Nikolaus Kerö; <cite>Monitoring and Analysis of SMPTE ST 2059-2 PTP Networks and Media Devices</cite>, SMPTE Motion Imaging Journal ( Volume: 130, Issue: 6, July 2021); SMPTE, 2021. Available at <a href="https://doi.org/10.5594/JMI.2021.3082992" target="_blank" rel="noopener">https://doi.org/10.5594/JMI.2021.3082992</a></span>

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Thomas Kernen and Nikolaus Kerö; Monitoring and Analysis of SMPTE ST 2059-2 PTP Networks and Media Devices, SMPTE Motion Imaging Journal ( Volume: 130, Issue: 6, July 2021); SMPTE, 2021
doi: 10.5594/JMI.2021.3082992
url: https://doi.org/10.5594/JMI.2021.3082992

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Thomas Kernen and Nikolaus Kerö; <cite id="bib-10-5594-jmi-2021-3082992">Monitoring and Analysis of SMPTE ST 2059-2 PTP Networks and Media Devices</cite>, SMPTE Motion Imaging Journal ( Volume: 130, Issue: 6, July 2021); SMPTE, 2021
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Tighter NIC/GPU Integration Yields Next Level Media Processing Performance [Active]
Can ST 2059-2 Benefit from PTP Version 2.1? [Active]
How to Effectively Enhance PTP Redundancy Using Dual Ports [Active]