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Delay guaranteed SFC placement with VNF parallelization in multidomain IoT networks.

Siquan Liu1, Chuangchuang Zhang2, Hongyong Yang1

  • 1College of Computer Science and Artificial Intelligence, Ludong University, Yantai, 264025, China.

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Summary

Network Function Virtualization (NFV) in IoT networks faces challenges with 6G delay requirements. A new algorithm efficiently places Service Function Chains (SFCs) to meet these demands, improving service acceptance and reducing costs.

Keywords:
Delay GuaranteeMulti-domain IoT NetworkSFC PlacementVNF parallelization

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Area of Science:

  • Computer Science
  • Network Engineering
  • Telecommunications

Background:

  • Network Function Virtualization (NFV) decouples network functions from hardware using Virtual Network Functions (VNFs).
  • Service Function Chains (SFCs) represent IoT services as ordered VNF sequences in NFV-enabled networks.
  • The expansion of IoT networks and 6G requirements introduce stringent delay constraints for SFC placement.

Purpose of the Study:

  • To address the challenge of delay-guaranteed SFC placement in multi-domain IoT networks.
  • To optimize SFC placement considering Quality of Service (QoS) and VNF dependencies.
  • To maximize service acceptance ratio and minimize operational costs under delay constraints.

Main Methods:

  • Formulated SFC placement as a multi-objective optimization problem.
  • Developed a Delay Guaranteed heuristic SFC Placement (DGSP) algorithm.
  • Incorporated VNF parallelization for independent VNFs and shortest path for virtual link mapping.

Main Results:

  • The DGSP algorithm achieved a higher service acceptance ratio compared to existing methods.
  • The proposed algorithm resulted in lower operational costs.
  • Simulation results validated the effectiveness of the DGSP algorithm in meeting delay requirements.

Conclusions:

  • The DGSP algorithm offers an efficient solution for delay-guaranteed SFC placement in multi-domain IoT networks.
  • The approach effectively balances service acceptance, operational cost, and stringent delay requirements.
  • This work contributes to the advancement of NFV in 6G-enabled IoT environments.