Exploring the design space of self-regulating power-aware on/off interconnection networks

Vassos Soteriou, Li Shiuan Peh

Research output: Contribution to journalArticlepeer-review


With power consumption becoming increasingly critical in interconnected systems, power-aware networks will become part-and-parcel of many single-chip and multichip systems. As communication links consume significant power regardless of utilization, a mechanism to realize such power-aware networks is on/off links - network links that can be turned on/off as a function of traffic. In this paper, we investigate and propose self-regulating power-aware interconnection networks that turn their links on/off in response to bursts and dips in traffic in a distributed fashion. We explore the design space of such on/off networks, outlining a 5-step design methodology along with various building block solutions at each step that can be effectively assembled to develop various on/off network designs. We applied our methodology to the design of two classes of on/off networks with links that possess substantially different on/off delays, an on-chip network as well as a chip-to-chip network, and show that our designs are able to adapt dynamically to variations in network traffic. Three specific network designs are then constructed, presented, and evaluated. Our simulations show that link power consumption can be reduced by up to 54.4 percent, with a modest increase in network latency.

Original languageEnglish (US)
Pages (from-to)393-408
Number of pages16
JournalIEEE Transactions on Parallel and Distributed Systems
Issue number3
StatePublished - Mar 2007


  • Communication link
  • Interconnection networks
  • Low-power design
  • Network topology
  • On/off mechanism
  • Routing algorithm

ASJC Scopus subject areas

  • Signal Processing
  • Hardware and Architecture
  • Computational Theory and Mathematics


Dive into the research topics of 'Exploring the design space of self-regulating power-aware on/off interconnection networks'. Together they form a unique fingerprint.

Cite this