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Open AccessArticle

An Efficient Availability Guaranteed Deployment Scheme for IoT Service Chains over Fog-Core Cloud Networks

School of Electronic Engineering, Soongsil University, Seoul 06978, Korea
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This paper is extension version of the conference paper: Dinh, T.; Kim, Y. An efficient improvement potential-based virtual network function selection scheme for reliability/availability improvement. In Proceedings of the 2018 International Conference on Information Networking, Chiang Mai, Thailand, 10–12 January 2018.
Sensors 2018, 18(11), 3970; https://doi.org/10.3390/s18113970
Received: 17 October 2018 / Revised: 13 November 2018 / Accepted: 13 November 2018 / Published: 15 November 2018
(This article belongs to the Special Issue Emerging Enabling Technologies for IoT)
High availability is one of the important requirements of many end-to-end services in the Internet of Things (IoT). This is a critical issue in network function virtualization (NFV) and NFV-enabled service function chaining (SFC) due to hard- and soft-ware failures. Thus, merely mapping primary VNFs is not enough to ensure high availability, especially for SFCs deployed over fog - core cloud networks due to resource limitations of fogs. As a result, additional protection schemes, like VNF redundancy deployments, are required to improve the availability of SFCs to meet predefined requirements. With limited resources of fog instances, a cost-efficient protection scheme is required. This paper proposes a cost-efficient availability guaranteed deployment scheme for IoT services over fog-core cloud networks based on measuring the improvement potential of VNFs for improving the availability of SFCs. In addition, various techniques for redundancy placement for VNFs at the fog layer are also presented. Obtained analysis and simulation results show that the proposed scheme achieves a significant improvement in terms of the cost efficiency and scalability compared to the state-of-the-art approaches. View Full-Text
Keywords: Internet of Things; IoT service function chains; network function virtualization; fog computing; edge computing; high avaliability Internet of Things; IoT service function chains; network function virtualization; fog computing; edge computing; high avaliability
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Dinh, N.-T.; Kim, Y. An Efficient Availability Guaranteed Deployment Scheme for IoT Service Chains over Fog-Core Cloud Networks. Sensors 2018, 18, 3970.

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