Novel Lifetime Extension Technology for Cyber‐Physical Systems Using SDN and NFV
Jun Wu, Shibo Luo · 2017
Cyber-physical systems (CPS) are one of the promising techniques that pave the path to smart and efficient industry ecosystem. In general, large amounts of wireless sensors are deployed in CPS. Therefore, the collaboration of sensors becomes the basis for the operation of CPS. However, its lifetime is limited by the inherent heterogeneous nature of CPS. To realize the efficient deployment of cyber-physical systems in industrial system, it is vital to extend its collaboration lifetime. Energy-oriented collaboration lifetime extension approach has attracted a lot of attention in cyber-physical systems, in which topology control and sleep mode are the two most promising methods that contribute to improving energy efficiency. However, existing mechanisms are not developed comprehensively and are with low efficiency. At the same time, software-defined networking and network function virtualization are future network techniques that make the underlying networks and devices programmable. They have inherent advantages to control topology and node mode. In this chapter, a novel lifetime extension scheme, NLES, is proposed for cyber-physical systems using software-defined networking and network function virtualization. First, the global view and central control properties of software-defined networking are used to monitor cyber-physical systems. The instant programmability of software-defined networking and instant deployment capability of network function virtualization are utilized to control the topology of cyber-physical systems network and the modes of sensors in cyber-physical systems. Also, workflows and protocols in the mechanism are presented. Second, a game theoretic topology decision approach is proposed to decide the topology clustering and virtual network function deployment of sensors at run-time of cyber-physical systems effectively. Finally, the simulation results of case study show that NLES has longer lifetime compared with the traditional schemes.