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The combined presence of Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS) components in the radio propagation environment can severely degrade the Ultra-Dense Networks (UDNs) performance. Backed by a stochastic geometry model, we show that when the LOS/NLOS propagation components are taken into account, and as the cell density increases, UDNs suffer from low coverage and the Area Spectral Efficiency...
One important issue in wireless sensor networks is the area coverage problem. It describes how well a sensing field is supervised by sensors. In fact, an appropriate coverage strategy needs simultaneous activation of a large number of nodes as each location should be covered by at least k sensors, with k > 1 for many applications. Some sensors may be redundant because of overlaps in the nodes’...
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