IDSRT: Integrated dynamic soft real-time architecture for critical infrastructure data delivery over WLAN

Hoang Viet Nguyen, Raoul Rivas, Klara Nahrstedt

Research output: Contribution to journalArticlepeer-review


The real-time control data delivery system of the Critical Infrastructure (i.e. SCADA-Supervisory Control and Data Acquisition system) is important because appropriate decisions cannot be made without having data delivered in a timely manner. Because these applications use multiple heterogeneous resources such as CPU, network bandwidth and storage, they call for an integrated and coordinated real-time scheduling across multiple resources to meet end-to-end deadlines. We present a design and implementation of iDSRT-an integrated dynamic soft real-time system to provide fine-grained end-to-end delay guarantees over WLAN. iDSRT takes the deadline partitioning approach: end-to-end deadlines are partitioned into multiple sub-deadlines for CPU scheduling and network scheduling. It integrates three important schedulers: task scheduler, packet scheduler and node scheduler to achieve global coordination. We validate iDSRT in Linux and evaluate it in an experimental SCADA test-bed. The results are promising and show that iDSRT can successfully achieve soft real-time guarantees in SCADA system with very low packet loss rate compared to available commodity best-effort systems.

Original languageEnglish (US)
Pages (from-to)96-108
Number of pages13
JournalMobile Networks and Applications
Issue number1
StatePublished - Feb 2011


  • WLAN
  • multi-resource scheduling
  • quality-of-service

ASJC Scopus subject areas

  • Software
  • Information Systems
  • Hardware and Architecture
  • Computer Networks and Communications


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