User's Manual

40mW ACS User Guide Technical Introduction ii
PAS System
3.1.2 Micro-zone Overlap
The service will be the best if ACSs are installed as per the micro-zone overlap
structure.
2 Km
3.5-5 Km
5.5 -7 Km
A
bout 14K
m
Figure3-2 Coverage Area in Micro-zone Overlap Structure
The application of micro-zone overlap and dynamic channel allocation makes the
system more flexible and enlarges the system capacity. Because the ACSs are
installed considering coverage overlapped, subscribers can use all the channels
while calling or called. Thus, the micro-zone overlap structure enhances the
system reliability and quality of service. Even if a ACS is broken down, the
system capacity will not be affected. Due to its dynamic channel allocation,
operators’ requirements can be easily satisfied without frequency planning, which
is also convenient for expansion.