A Wormhole NoC Protocol for Mixed Criticality Systems

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Lack of scalability and difficulties in predicting the temporal behaviour of bus-based architectures has lead to the development of Network-on-Chip (NoC) protocols that provide a schedulable resource for moving data across multi-core platforms. Wormhole switching and credit-based flow control protocols have been used to support flit-level priority-preemptive link arbitration in NoCs, which leads to analysable temporal behaviour. In this paper we develop a new protocol (WPMC), based on the same family of protocols, that gives full support to mixed-criticality on-chip communications. WPMC is defined to give adequate partitioning between criticality levels, and to use resources efficiently. Analysis is developed and implementation aspects are considered. A cycle accurate simulator is used for scenario-based verification, and the effectiveness of the protocol and its scheduling model is evaluated via message-set generation.
Original languageEnglish
Title of host publicationReal-Time Systems Symposium (RTSS), 2014 IEEE
Number of pages12
ISBN (Print)9781479972890
Publication statusPublished - 1 Dec 2014


  • multiprocessor interconnection networks
  • network-on-chip
  • protocols
  • WPMC protocol
  • bus-based architectures
  • credit-based flow control protocols
  • cycle accurate simulator
  • message-set generation
  • mixed criticality systems
  • multicore platforms
  • network-on-chip protocols
  • scenario-based verification
  • schedulable resource
  • scheduling model
  • temporal behaviour
  • wormhole NoC protocol
  • wormhole switching
  • Interference
  • Ports (Computers)
  • Routing
  • Routing protocols
  • Switches
  • System-on-chip
  • fixed priority
  • mixed criticality
  • network on chip
  • scheduling
  • wormhole routing

Cite this