Prof. Gerhard Fohler
Stephanie Jung
Phone: +49 631 205 2086

Office Hours
Mon/Tue: 13:00-16:00
Wed-Fri: 08:00-11:00
You are here: RTS-Portal>>Publications


Search Publications


Reducing the End-To-End Delay of Rate-Constrained Traffic in TTEthernet Networks

Category: Inproceedings
Author(s)Florian Heilmann, Gerhard Fohler
Source15th Workshop on Real-Time Networks (RTN'17) in conjuction with 29th Euromicro International Conference on Real-time Systems (ECRTS'17).
Date Jun 2017


Safety-critical Ethernet based networks are receiving significant attention in avionics, automotive and industry domains. Time-Triggered Ethernet (TTEthernet AS6802) provides safety-critical transmission guarantees via a high priority time-triggered (TT) traffic class and a lower priority rate-constrained (RC) traffic class. TT traffic is transmitted between the synchronized nodes of the network in scheduled TT transmission windows. In this work, we analyze the impact of different placement strategies for these TT transmission windows on end-to-end delay and jitter of RC messages on the same path segment. We show that, depending on the placement of the TT transmission windows, the end-to-end delay and jitter of RC messages can vary significantly. We further introduce link-based offsets, a scheduling strategy at the TT transmission window level which allows to reduce the effects of TT transmission windows on RC messages. These offsets are applied to all TT transmission windows of a link and reduce the amount of time that an RC message is delayed by TT traffic. Link-based offsets can be implemented in the TTEthernet scheduler and do not require hardware modifications. We show that link-based offsets can reduce the end-to-end delay and jitter of RC traffic, and evaluate our claims using an OMNET++ simulation.


Upcoming Events
Currently no events
Latest News:
16.05.17 22:53
Our paper titled "Performance Indicators and Use Case Analysis for Wireless Networks in...

09.05.17 14:02
Our paper titled "Improving Security for Time-Triggered Real-Time Systems against Timing...

09.05.17 11:02
Our paper titled "Reducing the End-To-End Delay of Rate-Constrained Traffic in TTEthernet...

All News