DESCRIPTION OF WORK
This WP is organized in two parallel tasks:
WP4.1 – Development of three WINSOC simulators (WP leader DUNE)
System level simulator development: design of the abstraction levels of the simulator platform, starting from the physical level (physical system to be monitored) to generate the events driving the simulation; the simulator will be composed by three different subsystem simulators:
- the system level simulator generating the events and controlling the overall network behaviour; network simulator assessing the behaviour of the algorithms developed in WP3 and the associated air interfaces assuming appropriate channel models; node simulator emulating the node behaviour taking into account the hardware implementation
The end users will be involved on the system level development to ensure/validate that the events generated by the simulators are as close as possible to real cases.
- Information extraction: definition and evaluation of at least four different schemes for extracting the information stored in the sensor nodes of the network: (a) on-demand: the network (or specialised sensors in mixed topologies) deliver information only when a query (scheduled or triggered) is received; (b) event-driven: the network deliver information only when a specific event is detected (e.g. intrusion); (c) passive extraction: each sensor stores its information by changing some physical property which can be detected by some external probe; (d) overlay extraction: for mixed topologies and can jointly or separately include (a) and (b).
- Performance analysis: statistical evaluation of the operational performances of the network as a function of the information extraction strategy, radio channel conditions, and sensor nodes failure statistics. Quantitative values will be given for network metrics such as reaction time, information degradation, reliability, fault tolerance, etc. as a function of the application/scenario. The results will constitute a body or recommendations toward the refinement of the sensor node design and the coupling algorithms devised in WP3
WP4.2 - Sensor node design and radio access schemes (WP leader SCOM)
- Analysis of radio technologies: different radio technologies will be analysed and their suitability will be assessed for the sensor node design. In particular UWB (Ultra Wide Band), ISM single chip radio (CMOS integrated transceiver), RFID components will be analysed.
- Design of the modulation techniques: design a correspondence between the sensor parameter(s) to be transmitted (e.g. internal status of the sensor) and the transmitted waveform parameters. Starting hypothesis will be analog sensor parameter and analog transmission; then both discrete sensor parameters as well as digital transceivers will be addressed. The identification of the radio access scheme will take into account the requirements on the RF part simplicity and the reduced EM emissions, as well as the extension to the multi-parametric case, i.e. the simultaneous transmission of multiple information (e.g. on orthogonal channels
- Radio node prototype design: An ad-hoc prototype development of dedicated radio circuitry will be undertaken, aiming at simpler radio interfaces. According with the approach followed by the project, the objective of the activity is to shrink (possibly eliminate) the OSI-like layered structure.
- Specifications for the sensor node prototype: taking into account the analysis of the modulation techniques, radio technologies, the information extraction methodology and the indications arising from the system level evaluations, the final specifications will address to the HW/SW development of radio node prototype, listing functional and parametric requirement that the HW/SW will have to satisfy, along with the interface specifications between the transducer(s) and the radio part of the sensor node.