Function Split between Delay-Constrained Routing and Resource Allocation for Centrally Managed QoS in Industrial Networks

Jochen W. Guck, Martin Reisslein, Wolfgang Kellerer

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


Industrial networks demand centrally controlled quality of service (QoS), often in the form of hard real-time guarantees. Software-defined networking (SDN) provides a convenient paradigm for central QoS control. However, existing SDN-based solutions cannot guarantee hard real-time QoS as they rely on a control loop over the forwarding (data) and control planes. We propose a novel SDN-based QoS control framework that maintains an accurate network model through network calculus to avoid a control loop over forwarding and control planes, allocates resources to and routes flows over a network of 'queue links,' whereby each physical network link houses multiple queue links (with different QoS levels), and manages QoS through a function split between delay-constrained least-cost routing on the network of queue links and the resource allocation to the queue links. This function split greatly reduces the computational complexity while achieving hard real-time QoS with high bandwidth utilization. Our evaluation results indicate that our function split approach allows for online runtime admission control and can achieve bandwidth utilization above 80% while meeting deterministic real-time QoS requirements.

Original languageEnglish (US)
Article number7517394
Pages (from-to)2050-2061
Number of pages12
JournalIEEE Transactions on Industrial Informatics
Issue number6
StatePublished - Dec 2016


  • Bandwidth utilization
  • industrial network
  • network calculus
  • real-time quality of service (QoS)
  • software-defined networking (SDN)

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Information Systems
  • Computer Science Applications
  • Electrical and Electronic Engineering


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