PhaseNoC: Versatile Network Traffic Isolation Through TDM-Scheduled Virtual Channels

Anastasios Psarras, Junghee Lee, Ioannis Seitanidis, Chrysostomos Nicopoulos, Giorgos Dimitrakopoulos

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


As multi/many-core architectures evolve, the demands on the network-on-chip (NoC) are amplified. In addition to high performance and physical scalability, the NoC is increasingly required to also provide specialized functionality, such as network virtualization, flow isolation, and quality-of-service. Although traditional architectures supporting virtual channels (VCs) offer the resources for flow partitioning and isolation, an adversarial workload can still interfere and degrade the performance of other workloads that are active in a different set of VCs. In this paper, we present PhaseNoC, a truly noninterfering VC-based architecture that adopts time-division multiplexing at the VC level. Distinct flows, or application domains, mapped to disjoint sets of VCs are isolated, both inside the router's pipeline and at the network level. Any latency overhead is minimized by appropriate scheduling of flows in separate phases of operation, irrespective of the chosen topology. When strict isolation is not required, the proposed architecture can employ opportunistic bandwidth stealing. This novel mechanism works synergistically with the baseline PhaseNoC techniques to improve the overall latency/throughput characteristics of the NoC, while still preserving performance isolation. Experimental results corroborate that - with lower cost than state-of-the-art NoC architectures, and with minimum latency overhead - PhaseNoC removes any flow interference and allows for efficient network traffic isolation.

Original languageEnglish
Article number2488490
Pages (from-to)844-857
Number of pages14
JournalIEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Issue number5
Publication statusPublished - 2016 May 1
Externally publishedYes


  • Network Traffic Isolation
  • Network-on-Chip
  • Time-Division Multiplexing
  • Virtual Channels
  • Virtual Networks

ASJC Scopus subject areas

  • Software
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering


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