# Development of Intelligent Core Network for Tactile Internet and Future Smart Systems
## 1 Introduction
MANO is an open source project that was developed by European Telecommunications Standards Institute (ETSI) [10]. SDN is a new approach that provides a dynamic and cost effective network structure by the physical separation of data forwarding plane and control plane. The control plane is the network part that gives the appropriate decision to handle traffic [11; 12; 13]. The data plane is the other part of the network, which forward traffic in respond to the control plane. The control signal moves from the control plane to the data plane by means of an open standard interface protocol, such as OpenFlow protocol and ForCES protocol [14]. SDN allows for the network operator to configure, control, and manage the network through customized software known as application programming interfaces (APIs). SDN is mainly presented to simplify the network hardware and increase the network flexibility [15]. Dawn of the software networks is supported by the recent development in NFV and SDN technologies. NFV and SDN technologies are not reliant on each other, but they complete each other [16]. Both technologies arise the advantage of employing inexpensive programmable hardware. The early generations of SDN technology were corresponded with data centers, campus networks, and private networks. By the time that SDN find its way to the core of cellular networks. On the other hand, NFV aims to replace the Middleboxes that are used in cellular networks from hardware appliance to software running on commodity hardware (i.e., less expensive general server hardware). Employing SDN and NFV provides a way for performing the recent important concept of network slicing. The network slice may be viewed as a group of network functions worked together with a specific radio access technology (RAT) to achieve a certain use case of the network [17]. In another word, a network slice is a way of supporting communication service by means of a special connection. Network slicing allows network operator to set up multiple logical networks (each for a certain use case) on the same physical infrastructure [18]. One way to improve the cellular network efficiency is to offload network operations to cloud units that are employed at the edge of the cellular system. This is the idea behind the recent paradigm launched by the cellular network operators and known as MEC. MEC is the way of carrying cloud computing capabilities to the edge of the cellular network one hop away from the user equipment. European Telecommunications Standards Institute (ETSI) is one of the leading organizations in the research of MEC and the standardization of this technology. The latest progress in MEC platforms and their cellular uses are summed in [19]. The main benefit of employing MEC in cellular networks is the reduction of end to end system latency. Moreover, it provides a higher system bandwidth and reduces the network congestion by providing away for offloading data. In this paper, we introduce a network structure for the Tactile Internet system employs SDN at the core of the network and enable NFV. The system uses MEC in multilevel hierarchical. In (Section 2, the related works to the proposed system is discussed. In Section 3, the system structure is proposed. In Section 4, the system is simulated over a reliable environment. Finally, Section 5 gives the conclusion.