System Architecture Design

pSHIELDSystem Architecture Design• Robustness and Composability in the general system framework• Commitment to the Technical AnnexPUCryptographic nodes(IEEE 802.15.4 channel 11)`Nano nodes(IEEE 802.15.4 channel 13)Service DiscoveryAgent / UPnPBridgeService DiscoveryAgent / UPnPBridgeLANInternetMicro/Personal nodes(IEEE 802.15.4 channel 15)Self-x nodes(IEEE 802.15.4 channel 17)FPGAPower node(IEEE 802.15.4 channel 19)3.3.2 Software Defined RadioFigure 10 - Network Layer: paradigm architecture.SDR platform will be used to provide smart SPD driven transmission. It is a radio communication softwaresystem, implemented on software (e.g., on embedded devices), meant to replace system components,such as amplifiers, filters, mixers, modulators, originally implemented in hardware. It can receive andtransmit a variety of different radio waveforms, based on the software used. It can, also, be integratedeasily with hardware security modules. Significant advantages can be derived from this alternativerealization of a radio communication system:• Variable network parameters can be set straightforwardly and on-line, whereas in hardwareimplementation reconfigurations are, frequently, cumbersome or need to be conducted manually• The communication itself can be changed, providing the possibility of access to different networks(e.g., GSM and Wi-Fi) without having to switch between different devices• Signal processing can be managed by a general purpose processor, providing a radio that canreceive and transmit heterogeneous waveforms (depending on the specific software used)• SDR is flexible in overcoming problems of limited spectrum availability• Addition of an SDR node in a mesh network increases its capacity and reduces energy consumedper nodeSmart transmission techniques by pSHIELD Network Layer will rely on waveform-agile implementations ofSDR. The two basic elements which model an SDR system are a computing unit and an RF front end. InPUD2.3.2Issue 5 Page 39 of 122