Smart Low EMF Radio
One of the goals of the LEXNET project is to provide means of reducing human exposure to electromagnetic fields (EMF) that emanate from radio frequency (RF) communications devices. In the frame of the “Smart Low EMF Radio” work package (WP), the aim is to recognize the innovative radio components and transmission techniques with the highest potential for EI reduction as well to quantitatively assess the level of EI reduction they can achieve.
By using a five-step approach in a common evaluation methodology for EI assessment all the WP4 studied solutions will provide results on EI reduction in a unified manner. Moreover, by examining them in their relevant scenarios defined in WP2, the obtained results ensure that the comparison of the effectiveness between solutions will be as fair as possible. Using this methodology, selection can be made among the Low EMF technologies research work, and priority can be given to the most effective ones. Also, the expected EI reduction after combining some of the proposed innovative techniques can be better assessed by having this kind of unified approach.
The LEXNET EI is implemented to analyse performance and relevancy of low EMF radio technologies thanks to a common evaluation methodology. Preliminary results (EI reduction versus Quality of Service (QoS)) are proposed for each solution regarding a specific scenario (results can be found in deliverable D4.2). Exposure reductions vary from 5% to 80% depending on the solutions while checking QoS is maintained. These preliminary results will be consolidated, eventually combined, and evaluated based on a daily ICT usage during the third year of the LEXNET project.
LEXNET WP4 investigates a dozen of techniques (both on hardware and radio link) sorted in 3 main categories:
EM field spatial distribution optimization (handset antenna radiation control, Beamforming antenna for miniature Small-Cell Base Station and for laptop, Relay deployment);
Transmission usage optimization (DTX/sleep modes mechanism, Interference mitigation, Signalling reduction impact, Retransmission algorithms);
Receiving performance enhancement to request lower transmitted power (Enhanced receiving RF front-end).
The exposure evaluation methodology implemented in the WP4 (based on EI) allows to compare the human EMF exposure to any radio technologies. As a result, people and stakeholders could easily select or assess the most promising low EMF radio technologies for a given usage in a given scenario.