System Architecture Design

pSHIELDSystem Architecture DesignPU6 System Design6.1 Node LayerThe pSHIELD Node Layer concerns the creation of an Intelligent ES HW/SW Platform encompassingintrinsic, innovative SPD functionalities, providing proper services to the pSHIELD Middleware Adaptersenabling the pSHIELD Composability and consequently the desired system SPD.Three different kinds of Intelligent ES Nodes are expected:• nano nodes• micro/personal nodes• power nodesThese three node types (which can be considered three node levels of increasing complexity) representthe basic components of the lower part of the SPD Pervasive System and cover the possiblerequirements of several market areas.Each of these node types provides different levels of capabilities to the remaining pSHIELD layers.This section covers the specifications of the pSHIELD SPD Node Layer, and provides a high leveldescription of the major components and interfaces that make up SPD Nodes. It then describes a generalarchitecture for building-up pSHIELD SPD Nodes and some examples of specific architecture decisionsfor different kinds of Nodes.6.1.1 Formal conceptual modelThe figure below provides a conceptual model of a pSHIELD Node Layer. This is a generic model for allthe pSHIELD Node types, which can be implemented in different architectures, providing differentfunctionalities, different SPD compliance levels and different capabilities, depending on the type of nodeand application field.SPD Node architecture is composed of different functional blocks and each one can implement severalfeatures of different complexity and performance. The choice of which features to implement depends onthe application scenario and SPD Compliance Level required for the system.PUD2.3.2Issue 5 Page 66 of 122