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Energy‐Aware Controller Placement With Delay Guarantees for In‐Band SDN

Author

Listed:
  • Tomofumi Kondo
  • Luis Guillen
  • Satoru Izumi
  • Toru Abe
  • Takuo Suganuma

Abstract

Software‐defined networking (SDN) enables flexible, programmable networks, but in large deployments, poor controller placement can raise latency and energy use. This paper presents a practical in‐band SDN model and an optimization method that jointly accounts for control‐plane delay and device power consumption to place controllers and configure switches. We formulate the problem as a binary integer programming (BIP) that decides controller locations, which switches remain active, and port bit‐rates and routes. Experiments on a large WAN topology (Janos‐US) show the approach can cut total network energy by up to 15% while keeping control‐plane delays within required bounds, offering network operators a straightforward way to trade responsiveness for energy savings.

Suggested Citation

  • Tomofumi Kondo & Luis Guillen & Satoru Izumi & Toru Abe & Takuo Suganuma, 2026. "Energy‐Aware Controller Placement With Delay Guarantees for In‐Band SDN," International Journal of Network Management, John Wiley & Sons, vol. 36(1), January.
    • Handle: RePEc:wly:intnem:v:36:y:2026:i:1:n:e70036
    DOI: 10.1002/nem.70036
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