Q-Soft: QoS-Aware Traffic Forwarding in Software-Defined Cyber-Physical Systems

Bera, S and Misra, S and Saha, N and Sharif, H (2022) Q-Soft: QoS-Aware Traffic Forwarding in Software-Defined Cyber-Physical Systems. In: IEEE Internet of Things Journal, 9 (12). pp. 9675-9682.

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Abstract

The next-generation cyber-physical systems (CPSs) with heterogeneous applications have diverse Quality-of-Service (QoS) requirements in terms of throughput, end-to-end latency, and packet drop reliability. To meet such diverse QoS requirements, in this article, we propose a QoS-aware traffic forwarding scheme in software-defined CPS. The proposed scheme is presented as a two-stage optimization framework to minimize the associated costs in traffic forwarding. In the first stage, we aim to minimize the required number of 'candidate' switches for a given network to minimize network deployment costs. In the second stage, we design a comprehensive cost function considering end-to-end delay, flow-rule utilization, and link utilization in the network. Based on the designed cost function, we formulate another optimization problem for optimal traffic forwarding (OTF). As solving OTF is NP-hard, we propose an efficient greedy-heuristic approach to solve the problem while considering application-specific QoS requirements. Further, we propose a packet-tagging method to assist the controller in mitigating rule congestion at the software-defined networking devices, and hence improve the overall network performance. Extensive results show that the proposed scheme minimizes the network delay and QoS-violated flows by up to 50 and 90, respectively, compared to the state-of-the-art schemes. © 2014 IEEE.

Item Type:	Journal Article
Publication:	IEEE Internet of Things Journal
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Application programs; Cost functions; Cyber Physical System; Embedded systems; Heuristic methods; Internet of things; Quality of service; Software defined networking; Software reliability, Delay; Optimisations; Packet-tagging; Quality-of-service; Quality-of-service.; Routings; Software; Software-defined networks; Traffic Engineering, Optimization
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	21 Sep 2022 09:52
Last Modified:	21 Sep 2022 09:52
URI:	https://eprints.iisc.ac.in/id/eprint/76703

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