User's Manual

Planning a HiPath Cordless IP System
c03.fm
Propagation Conditions for Radio Traffic
A31003-C1010-S100-2-7620, 08/2010
32 HiPath Cordless IP, Service Manual
• indoor areas in buildings made of brick and light construction materials
• indoor areas in reinforced concrete buildings with diverse interior layout,
for example.
3.3.1 In the Open with Visibility
In this scenario, the electromagnetic waves are subject to the lowest amount of
attenuation with the result that they produce the greatest radio wavelength.
In principle, base stations in such a scenario produce a radio coverage range with
a radius of up to 300 m.
This, however, is usually not possible, since trees, bushes and moving
obstructions, such as, people, animals, and vehicles in the direct propagation
route can significantly reduce propagation.
NOTE: A base station installed in an attic directly beside a dormer window
(no metal reinforcement in the window pane) is the alternative to the outdoor
housing for coverage of the outdoor area.
Choose the mounting location carefully:
The base station is often exposed to extreme environmental temperatures, for
example, direct sunlight or extreme cold.
3.3.2 Industrial Sites
Buildings of varying structural materials may be found here, including those:
• of light construction materials,
• of brick,
• of reinforced concrete,
• with metal facades.
The distances between the buildings, however, are rarely greater than 100 m. In
this scenario, outdoor base stations are practical for covering the outdoor area.
• Buildings of brick or light construction materials
are generally penetrable, but the magnetic field reception behind the walls is
extremely low, resulting, quasioptically, in a shadowed area.
For example, in the case of a base station installed on the southern side of a
brick building, the range limit on the northern side would be attained
immediately or after just a few meters, owing to the insertion loss.