Knowledge Base

Join UNH-IOL's Bob Noseworthy & Jason Sisk in a discussion centered around IEEE 802.1, specific to Time Sensitive Networking (TSN) and IEEE 802.3 Single Pair Ethernet. Hear updates from the IEEE 802.1 and .3 Plenary, 10BASE-T1L and 10BASE-T1S Status, IEEE 1588 Certification, and more.

Learn about recent updates centered around IEEE 802.1, specific to Time Sensitive Networking (TSN) and IEEE 802.3 Single Pair Ethernet. This month's forum covers the following topics for 10BASE-T1S Plugfest, IEEE Plenary Bangkok and 1000BASE-T1 and Multigig Updates.

Watch UNH-IOL's Bob Noseworthy in the discussion centered around IEEE 802.1, specific to Time Sensitive Networking (TSN) and IEEE 802.3 Single Pair Ethernet. Expect the following updates in the video:

• Status / New Findings from Automotive Ethernet Congress
• 10BASE T1S Updates
• 802.1 & 802.3 Updates
• Summary of ongoing TSN profile work
• Live Q&A with open discussion

Join UNH-IOL's Bob Noseworthy in our discussion centered around IEEE 802.1, specific to Time Sensitive Networking (TSN) and IEEE 802.3 Single Pair Ethernet. Sync up with UNH-IOL’s status and development plans and join in to share your needs. Our format is new and open, but come prepared to share your ideas and expect the following:

• Status / New Findings from Automotive Ethernet Congress
• 10BASE T1S Updates
• 802.1 & 802.3 Updates
• Summary of ongoing TSN profile work

Join UNH-IOL's Bob Noseworthy in our discussion centered around IEEE 802.1, specific to Time Sensitive Networking (TSN) and IEEE 802.3 Single Pair Ethernet (SPE). Learn about the following IOL updates: 10BASE-T1L and Advanced Physical Layer (APL) work, 1000BASE-T1 validation, plans for MultiGigBASE-T1, TSN test NIC status, validation of Time Aware Shaping, PTP, UNH-IOL BitPhyer based preemption testing, including negative test conditions & IEEE Certification for IEEE 1588 profiles and more. Live discussion as well!

vIOLett® is a family of software packages used to test a product’s conformance to common protocols used in Time Sensitive Networking (TSN). There are vIOLett packages to test 1588, including Telecom and Power Profile, gPTP, MRP, MSRP, MVRP, and CBS. In addition, vIOLett is used to test products for the Avnu Certification Program, including Bridges, Pro AV or Milan Endstations, and Automotive devices. Learn how this tool can help identify areas of improvement during the development process and automate testing, reducing time to market and increasing your product’s reliability. In this presentation, industry experts, Bob Noseworthy and Daroc Alden, UNH-IOL, will review key features of vIOLett and what it means for your TSN testing. 

Correct time and timing is one of the foundational elements in enabling the communication and orchestration of technologies for accurate and optimal wide area monitoring, protection and control (WAMPAC) in the power industry. The National Institute of Standards and Technology (NIST) and the International Electrical and Electronic Engineer-Standard Association (IEEE-SA) conducted a workshop to gather inputs from stakeholders to identify, analyze, and provide guidance on technologies, standards and methodologies for addressing the practical timing challenges that are currently being experienced in wide area time synchronization. 

This is a collection of published papers assembled as a reference for those involved in characterizing and specifying high-performance clocks and oscillators. It is an interim replacement for NBS Monograph 140, Time and Frequency: Theory and Fundamentals, an older volume of papers edited by Byron E. Blair. This current volume includes tutorial papers, papers on standards and definitions, and a collection of papers detailing specific measurement and analysis techniques. The discussion in the introduction to the volume provides a guide to the content of the papers, and tables and graphs provide further help in organizing methods described in the papers

Not familiar with TSN? Refer to the following overview summarizing activities and materials from Michael Johas Teener (IEEE 802.1 TSN Chair), Dr Edward Lee (UC Berkley), and numerous other parties, conferences and events.

Get involved!

This is a slide deck.
Chapter 1 (20 slides) provides an overview of clock synchronization applications.
Chapter 7 (11 slides) compares various types of oscillator.
Chapter 8 (33 slides) provides an overview of timekeeping.
The remainder of the 300 slides describe engineering details of quartz oscillators.

This presentation provides an overview of clock and time synchronization across heterogeneous networks using the published standards:
- IEEE Std 802.1AS(TM)-2011 and
- IEEE Std 802.11(TM)-2012 Timing Measurement

With special focus on wireless / 802.11 links

Epoch & Unix Timestamp Conversion Tools

used at UNH-IOL for training and discussion

Terms used when discussing PTP

Terms used when discussing PTP

This is an informal glossary for educational purposes. It is reviewed by experts but is not intended to replace more formal definitions in standards. (Click the “Notes” link at the website for details.)

John Eidson's general overview of the technology, the standard, and applications, plus other topics. Hosted at NIST. This regards only PTP version 1. (Version 2 is from 2008.)

Contains ten Wireshark color filters for the ten PTP message types

A live clock shows the difference between UTC and TAI, which changes from 34 seconds to 35 seconds during the leap second on 2012-Jun-30. PTP time is the same as TAI.

A spreadsheet to help one develop a sense of time scales

Explains the use of PTP color filters in Wireshark. Goes with the file: (IOL_PTP_Wireshark_color_filters.txt)