ario 8 Implementation of Context-Aware Environments with Massive IoT Systems Fig. 8.6 Representation of a portion of the city center of Pamplona, Spain. The schematics represent the simulation model implemented, which considers the complete building structures within the city. Details for three of the transceiver locations within the scenario are depicted links, although the main focus in this case is potential connectivity of elements with higher channel dynamics, such as different vehicle types. Received power levels have been obtained within the scenario under analysis, and horizontal as well as vertical cut planes have been obtained and are depicted, for different frequencies of operation, in Figs. 8.7 and 8.8. As in the previous case of the UPNA campus scenario, received power level distributions vary as a function of the frequency of operation, exhibiting increased path losses as the frequency is increased. In this case, it is worth noting a more uniform received power level distribution in the case of the central vertical portion of the scenario which is coincident with the presence of one of the main streets within the scenario, enabling equivalent guiding effect from the surrounding buildings. Received power levels are in general lower, which is given by the fact that the receiver height considered in the results depicted in Fig. 8.7 has been 1.5m, consistent with opportunistic sensors located with users or vehicles. This leads to higher percentage of partial line-of-sight or non-line-of-sight conditions. Thus, transceiver location changes imply modifications in line-of-sight conditions, I. Picallo et al. [dBm] [dBm] X-axis (m) X-axis (m) [dBm] X-axis (m) Fig. 8.7 Estimation of distribution of received power levels for the Pamplona city center scenario, considering frequencies of operation f@868 MHz, f@2.4GHz, and f@3.5GHz, for constant height horizontal planes at a cut-plane height of 3.2m Vertical Planes x-316m Receiver power level path y-205m [dBm] [dBm] Y-axis (m) Y-axis (m) [dBm] Y-axis (m) Fig. 8.8