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Furthermore, they focus only on global analysis (i.e., on a macrocell scale) or on analysis at whole FAP deployment floor.
It enables to assess the evolution of network coverage metrics in the femtocell, at deployment floor and neighbor floor, in the buildings, etc.
Second, Figure 8 gives the impact of FAPs on the spectral efficiency CDFs at ground floor (FAP deployment floor) both for non-subscribers and corporate FAP subscribers, which is in line with observations made previously on SINR maps above.
These last results illustrate the relevance of the approach proposed in this article since a FAP deployment has a strong local impact not only at deployment floor, but also in neighbor floors.
The coverage quality of the whole deployment floor (ground floor) is also tremendously impacted: corporate FAP subscribers benefit from the maximum spectral efficiency (5.2 bps/Hz) in 25% of the floor, whereas non-subscribers encounter dead zones in 20% of the floor.
Conclusion is similar when considering 10 dBm FAP transmit power compared to 20 dBm. Figure 11 shows the impact of several parameters for non-subscribers located at ground floor (deployment floor): Degradation nearby the macro site is similar in terms of average spectral efficiency than in reference scenario (0.3 bps/Hz worse on average, see green versus blue curves and black versus orange curves).
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The impact of the ground floor deployment at the first floor is also significant: corporate FAP subscribers benefit from the maximum spectral efficiency (5.2 bps/Hz) in 10% of the floor, whereas non-subscribers encounter dead zones in 8.5% of the floor.
The exposure-optimized deployment covers the floor with two UMTS FBSs with an EIRP of 0 dBm.
The empirical results present 3D representations of the solutions for multi-floor deployment of Wi-Fi APs.
They lead to a 3D assessment of the impact on coverage performance of FAP deployments, locally, i.e., in the vicinity of FAPs, at deployment and neighbor floors, in surrounding streets and in neighbor buildings; and globally at network coverage level, indoors, and outdoors.
The impact of a single-floor FAP deployment in one restricted urban corporate area (composed of two buildings as shown in Figure 4) is evaluated in the presence of existing macro coverage.
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