System Architecture Design

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pSHIELDSystem Architecture DesignPUFigure 25 - Intelligent Wagon internal Network.• A: Access control device powered on-demand (e.g. numeric keypad featuring “ON” button)• B: Long lasting battery pack• C: Magnetic contact or other very-low consumption intrusion detection device• F: Central control unit featuring embedded CPU and OS• G: Low size power generator (e.g. eolic, solar panel, piezoelectric pad) – optional• M: Self-powered smart wireless sensor measuring vibrations, temperature, humidity, light, sound• N: Gateway node for the wireless sensor network• S: Satellite positioning antenna• T: Wide area wireless transceiver (GSM, GPRS, UMTS, EDGE)Regarding the implementation of the above scheme, three technologies have been, so far, foreseen:• Micro Node – Sun SPOT Sensor PlatformThey are platform integrated sensors. The processor board contains: temperature sensor, accelerometersensor, light sensor. The supporting software is SUN SPOT Java Virtual Machine with OS functionality• Personal Node - VIA Embedded BoardVIA EPIA N700 is a compact, low heat, power-efficient Nano-ITX board. The supporting software isUbuntu Linux Kernel 2.6.32-24-generic and Java runtime environment (JRE) 1.6 for development• M2M Platform – Telenor Shepherd PlatformA platform (named Shepherd) used for interoperability and integration that supports communicationbetween connected devices (nano and micro nodes) and makes them accessible from anywhere atanytime. The supporting software, providing connectivity, is HTTP API, Connected Object OperatingSystem (COOS)The aim of Shepherd platform is to provide a highly usable and abstract presentation of services to users,networking the components in a way similar to the following:PUD2.3.2Issue 5 Page 92 of 122
pSHIELDSystem Architecture DesignPU6.2.3 Functions and Services6.2.3.1 Smart SPD Driven TransmissionFigure 26 – Network of connected devices (M2M platform).Smart SPD information transmission is a feature of pSHIELD system, based on a Network Layer Service,usually called Software Defined Radio (SDR). An SDR platform will be used to provide smarttransmission. It concerns a radio communication software system, implemented on embedded devices. Itcan receive and transmit a variety of different radio waveforms, based on the software used. It can, also,be integrated easily with hardware security modules. It allows to accommodate new standards and newNetwork Layer services as they emerge upgrading the terminal software without requiring to develop anew dedicated Embedded System Device.The research activities on Network Layer functionalities of Embedded System Devices are focusing on thedevelopment of intelligent Cognitive Radio systems capable to understand and to be aware of thesurrounding environment, allowing the exploitation of all the available wireless network services by usinga single Embedded System Device. As an example, a Cognitive Radio (CR) could learn services availablein a locally accessible wireless computer network and could interact with those networks by using itspreferred protocols, so the users would not have confusion in finding the most suitable connection for, asan example, a video download or a printout. Additionally, a Cognitive Radio could select the carrierfrequency and choose the transmitted waveforms according to the perceived environment and to reach agiven goal, e.g. to avoid interference with existing wireless networks or to maximize the throughput whileguaranteeing an acceptable Quality of Service (QoS).The following picture shows the evolution of the radio network technologies for Embedded SystemDevices from traditional systems to Cognitive Radios.PUD2.3.2Issue 5 Page 93 of 122
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Figure 45 - pSHIELD Security Agent
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