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The Industrial Internet Consortium is a consortium of several well-known industrial groups in the IT world, such as IBM, HUAWEI and Intel. Through the Industrial Internet Reference Architecture report, this consortium puts forth a system architecture that is applicable to the IoT. This three-tiered architecture is based on three vertical layers or three levels (see Figure 1.2) (Lin et al. 2015).

The Edge Tier corresponds to all the nodes that collect data from proximity networks. This layer makes it possible to implement all control functions. Then comes the Platform Tier, which receives, processes and transmits control commands to the Edge Tier. This layer also enables the processing, analysis and running of operations on data collected from objects, before transmitting them in the opposite direction, toward the Enterprise Tier. The Enterprise Tier takes decisions and carries out the role of an interface with the end-user. It thus includes applications that allow control commands to be generated and to be sent to the Platform Tier. The different layers in this architecture are interconnected via access networks and service networks.

Figure 1.2. Architecture of the Internet of Things (Lin et al. 2015). For a color version of this figure, see www.iste.co.uk/mbarek/service.zip