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2024-04-24 - 08:07

Dates and Events:

OSADL Articles:

2023-11-12 12:00

Open Source License Obligations Checklists even better now

Import the checklists to other tools, create context diffs and merged lists

2023-03-01 12:00

Embedded Linux distributions

Results of the online "wish list"

2022-01-13 12:00

Phase #3 of OSADL project on OPC UA PubSub over TSN successfully completed

Another important milestone on the way to interoperable Open Source real-time Ethernet has been reached

2021-02-09 12:00

Open Source OPC UA PubSub over TSN project phase #3 launched

Letter of Intent with call for participation is now available

OSADL Special Events

OSADL Special Events

COOL - Compact OSADL Online Lectures

Online event

What is COOL?

COOL - Compact OSADL Online Lectures: Open Source meets Industry

  • COOL is an OSADL webinar series.
  • COOL takes place regularly once a month and covers new and state-of-the-art topics on Open Source software in industry, either on legal or on technical aspects.
  • COOL editions each consist of two lectures covering a special "Open Source meets industry" topic followed by a discussion round. The first "basic" lecture provides basic knowledge with regard to the respective topic and the second "advanced" lecture dives deeper into the topic and highlights special aspects. The discussion round gives all participants the possibility to ask questions and discuss with the respective speakers and the audience.
  • COOL speakers are OSADL experts on the one hand and external specialists on the other hand who kindly agreed to share their expert knowledge on the respective topic.
  • COOL is a virtual event. The lectures are held by live video streams. Speakers will be available for questions and discussion in a video conference which will take part subsequent to the live video streams.
  • COOL in general is designed to provide support how to best and compliantly use Open Source software in industry.

COOL October 2021 edition

Time synchronization for TSN: How to obtain both stable and correct time
Wednesday, October 20, 2021, 2pm to 4pm CEST

Agenda COOL October 2021 edition:

2:00pm to 2:45pm CEST:

Established technology: Using NTP for network time synchronization, Alexander Bähr, OSADL

2:45pm to 3:30pm CEST:

Future technology: Using PTP (IEEE 1588 and successors) for TSN time synchronization, Dr. Carsten Emde, OSADL

3:30pm to 4:00pm CEST:

Discussion and possibility to ask questions

Description COOL October 2021 edition:

There is now evidence that next generation real-time communication over network can mostly be realized with Open Source and will require time synchronization between peers with a very high precision. As a general principle, the quality of the real-time performance directly depends on the precision of the time synchronization; therefore, it is assumed that it should be better than ± 1 µs. The usual mechanism of time synchronization does not necessarily include a time basis to obtain the "correct" time. But correct time – although only in the range of ± 1 second – is generally required to provide meaningful timestamps in logfiles. Unfortunately, the standard method to obtain the correct time i.e. network time protocol (NTP) delivers the timestamp information only with a jitter of not less than 10 to 20 ms which obviously is not sufficient. The more advanced method to obtain a correct time such as from one of the available global positioning systems may be difficult to use. This COOL edition is, therefore, dedicated to creating a highly accurate peer-to-peer time synchronization that simultaneously ensures that timestamps represent the correct local time.

The first slot established technology of this COOL edition will be given by Alexander Bähr from OSADL, who is, among other, managing and maintaining the OSADL QA Farm including the many different sub-systems for computer time management. He will give an in-depth presentation of the various aspects of using NTP and fine-tuning the client systems with respect to the requirements of real-time network communication. In the second slot future technology, Carsten Emde, also from OSADL, will extend the methodology of computer time synchronization with the precise time protocol (PTP, IEEE 1588) and its successors as outlined in IEEE 802.1AS-Rev. The OSADL QA Farm runs a number of test network links that are equipped with TSN and use various methods of time synchronization and obtaining the correct time. Results from these monitoring set-ups will be presented and pros and cons discussed.

Recommended audience COOL October 2021 edition:

Software developers, software engineers, hardware engineers, system integrators, field application engineers, employees of QA departments, etc.

About the speakers of the COOL October 2021 edition:

- Alexander Bähr: Alexander is a state certified technician with a focus on control engineering. Since his youth he has been enthusiastic about electronics and data processing, especially Linux and Open Source. During his further professional activity with the main focus on measurement technology and its data processing, he has successfully used the various options of Open Source software in his professional environment for many years. Now he works as a technical computer scientist at the Open Source Automation Development Lab (OSADL) eG.

- Dr. Carsten Emde: Carsten has a long history of professional activities in the field of software development, system integration and training, particularly for embedded system software. He is specialized on graphical user interface, robotics, real-time systems and on legal and business aspects of using Open Source software in industry. He has been managing OSADL since its foundation in 2005.

Past COOL webinars

(Click on title to expand display.)






Please click on the respective COOL edition in order to display the full agenda and more details about the lectures and the respective guest speakers.

Download of COOL overview September - December 2023 as PDF file (v4)
Download of COOL overview January to May 2023 as PDF file
Download of COOL overview September to December 2022 as PDF file
Download of COOL overview January to May 2022 (new - v7) as PDF file
Download of COOL overview September - December 2021 as PDF file
Download of COOL overview January - May 2021 as PDF file

COOL conference language

The COOL sessions will be in English language.

COOL registration

Please use the online registration form to register for a particular COOL edition: Online registration form.
The access data will be sent to the registered participants shortly before the event.

COOL participation fee

Participation in COOL is free of charge.

COOL feedback

We would appreciate if participants of COOL completed and submitted the following feedback questionnaire in order to better meet their requirements and consider their suggestions in future events: Feedback sheet. Thanks in advance.

COOL presentations

The presentations and video clips of COOL will be made available after the event. Material of basic lectures will be publicly available, material of advanced lectures will be available exclusively for OSADL members or participants with login.

COOL Presentations and video clips (Member or participant login required to display material of advanced lectures)

Privacy policy

When you register for participation in the event you agree that the personal data you enter in the registration form will be processed at OSADL as necessary (see our privacy policy).

You may revoke this agreement at any time by email, mail or phone using the communication data provided at the imprint page, but this will also cancel your registration.


Please do not hesitate to contact us in case you have further questions:
Andrea Ruf
Phone.: +49 6221 98504 13