Page 301 - Integrated Wireless Propagation Models

I n - B u i l d i n g ( P i c o c e l l ) P r e d i c t i o n M o d e l s 279

FIGURE 5.2.7.1 3D capability of n -building coverage.
i

5.2. 7 Balance Between Coverage and Interference
The Lee model was created to predict propagation on a single floor in different
buildings based on the set of measured data. We have also shown that the pre­
dicted values are a close approximation of the measured ones. However, more
measured data need to be collected in order to fine-tune this model, shown in Sec. 5.3.
Further work should concentrate on making this model applicable to intrafloor
coverage/interference of a building and fine-tuning the model based on more mea­
sured data.
Balancing the coverage and interference is extremely important in the application of
in-building system design. Figure 5.2.7.1 shows a 3D capability of in-building coverage.
Figure 5.2.7.2 shows interference that especially can come from macro-, micro-, and
picocells. Minimizing interference in managing a desired outcome between coverage
and capacity in a dense urban area is challenging.

I c=J -65 dBm 1
- -75 dBm
- -85 dBm
I c=J -95 dBm I

FIGURE 5.2.7.2 I n -building interference plot. (A color version of this figure is available at www
. m hprofessional.comjiwpm.)