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An improved Lagrangian relaxation algorithm based SDN framework for industrial internet hybrid service flow
Yan Song1, Wenjing Luo2, Panfeng Xu1
1College of Physics, Liaoning University, Shenyang, 110000, China.
Scientific Reports
|March 10, 2022
Summary
Software Defined Networking (SDN) offers a new framework to reduce delays in the Industrial Internet, ensuring reliable, low-latency communication for Industry 4.0. This approach optimizes data flow for time-sensitive industrial control systems.
Area of Science:
- Computer Science
- Electrical Engineering
- Industrial Engineering
Background:
- The Industrial Internet is crucial for Industry 4.0, demanding high reliability and low latency for network control.
- Existing "store-and-forward" methods in traditional switches cause delays due to large data flows, impacting critical control operations.
- Guaranteed low end-to-end wait times are challenging due to the need for precise transmission timing and mixed data stream types.
Purpose of the Study:
- To propose a Software Defined Networking (SDN) framework to minimize delays and ensure real-time delivery of mixed service flows in the Industrial Internet.
- To address the challenges of latency and reliability in industrial network control systems.
- To enhance the efficiency of data transmission for Industry 4.0 applications.
Main Methods:
- Developed an SDN framework with a novel scheduling policy executed via the controller's northbound API to adapt to dynamic network topologies.
- Implemented a time-based data transmission strategy at switch ports to prevent queuing in intermediate switches.
- Introduced an improved Lagrangian relaxation algorithm for optimal low-latency path selection.
- Deployed path rules to switches using flow tables managed by the SDN controller.
Main Results:
- The proposed SDN framework effectively reduces delays in mixed service flow transmissions.
- The time-based data transmission and optimized path selection contribute to lower end-to-end wait times.
- Mathematical analysis and simulations confirm the efficiency and effectiveness of the proposed scheme compared to traditional methods.
Conclusions:
- The developed SDN framework provides an efficient solution for achieving low latency and high reliability in the Industrial Internet.
- This approach is vital for supporting the real-time control requirements of Industry 4.0.
- The optimized scheduling and path selection mechanisms are key to overcoming traditional network bottlenecks.
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