Curbing aggregate member flow burstiness to bound end-to-end delay in networks of TDMA crossbar real-time switches

Qixin Wang, Yufei Wang, Rong Zheng, Xue Liu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)


To integrate the nowadays rapidly expanding distributed real-time systems, we need multi-hop real-time switched networks. A (if not 'the') widely recognized/adopted real-time switch architecture is the TDMA crossbar real-time (TCRT) switch architecture. However, the original TCRT switch architecture assumes per-flow queueing. To support scalability, however, queue sharing (i.e. flow aggregation), must be allowed. With simple flow aggregation, flow burstiness can grow and infect, making schedulability and end-to-end delay bound analysis an open problem. To deal with this, we propose the real-time aggregate scheme. The scheme complies with the existing TCRT switch architecture, and deploys spatial-temporal isolation and over-provisioning to curb aggregate member flows' burstiness. This allows us to derive the closed-form end-to-end delay bound, and give the corresponding resource planning and admission control strategies. Simulations are carried out to show the effectiveness of the design.
Original languageEnglish
Title of host publicationProceedings of the 2012 IEEE 33rd Real-Time Systems Symposium, RTSS 2012
Number of pages12
Publication statusPublished - 1 Dec 2012
Event2012 IEEE 33rd Real-Time Systems Symposium, RTSS 2012 - San Juan, Puerto Rico
Duration: 5 Dec 20127 Dec 2012


Conference2012 IEEE 33rd Real-Time Systems Symposium, RTSS 2012
Country/TerritoryPuerto Rico
CitySan Juan


  • Aggregate
  • QoS
  • Real-Time
  • Switch

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Computer Networks and Communications

Cite this