Designing for a Neutral Host System
6-44
InterReach Unison Installation, Operation, and Reference Manual
CONFIDENTIAL
D-620003-0-20 Rev J
6.7
Designing for a Neutral Host System
Designing for a neutral host system uses the same design rules previously explained.
Since a neutral host system typically uses
multiple systems in parallel
with common
equipment locations,
it is best to design according to the minimum among the sys-
tems’ RAU coverage distances so that there will not be holes in the coverage area,
and so that the economies of a single installation can be achieved. For example, as
indicated in Section 7.1, the 1900 MHz RF signals do not propagate throughout a
building as well as the 800 MHz signals. Therefore, we design using the 1900 MHz
radiated distance, calculated with the path loss slope formula.
The example neutral host system described below consists of one iDEN, one 800
MHz, and two 1900 MHz systems and can support up to seven separate service pro-
viders in the following manner:
• 1 on iDEN
• 2 on 800 MHz, A band and B band
• 2 in each of the two 1900 MHz frequency sub-bands
Example Unison Neutral Host System
The following example configuration was designed to provide:
• Similar coverage per band in an office environment that is 80% cubicles and
20% offices.
• Similar capacity.
• Support for up to 7 Operators, where equipment has been shared to minimize
the number of parallel systems.
Example Configuration:
• 800 MHz iDEN: 16 channels (3 dBm)
• 800 MHz Cellular (3 dBm)
TDMA Band: 14 channels (shared)
CDMA Band: 3 channels (shared)
• 1900 MHz PCS (6 dBm)
TDMA Band: 14 channels
CDMA Band: 3 channels (shared)
GSM Band: 6 channels (shared)
