Towards a Deterministic Mixed Criticality High Availability Seamless Redundancy (HSR) Ring

  • Peter HeiseEmail author
  • Fabien Geyer
  • Alexandros Elefsiniotis
  • Roman Obermaisser
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9066)


There is a growing trend for real-time Ethernet in nearly all industrial branches. While each industry has its own Ethernet-based protocols in networks, the High Availability Seamless Redundancy (HSR) network is currently of interest to the automation industry. A key factor and main benefit of HSR is its built-in fault-tolerance against the failure of a single communication link. However, it lacks mechanisms to guarantee certain bandwidth to applications. In this paper we propose a mechanism to guarantee packet arrival within a certain time while still offering best-effort traffic in order to support for mixed criticality traffic. Furthermore, a mathematical model is developed, that describes the upper latency limit of the proposed mechanism. We compare HSR with and without the proposed extension using an OMNeT++ simulation and show its advantages and weaknesses.


Short Path Time Synchronization Link Failure Maximum Latency Ring Network 
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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Peter Heise
    • 1
    • 2
    Email author
  • Fabien Geyer
    • 1
  • Alexandros Elefsiniotis
    • 1
  • Roman Obermaisser
    • 2
  1. 1.Airbus Group InnovationsMunichGermany
  2. 2.University of SiegenSiegenGermany

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