User's Manual

1800MHz-1900MHz Off-Air Repeaters (OR Series) Page 91 080 0701F – Rel.04
CHAPTER 3
3.1
3) GENERAL DESCRIPTION
Mobile phone systems have increasingly been spreading in these last years.
Besides providing reliable and good quality connections, telecommunication system services should cover
as widest territory as possible.
It is well-known that connections to users’ terminals are obtained on air by means of steady stations named
radio bases, located through the whole territory so as to obtain a continuous covering through cells one next
to another.
That allows a great number of users to enter the system using few channels.
It is important to maintain the continuity of radio-electrical coverage (and consequently, of service within
each cell) in order to guarantee an acceptable level of communication.
BTS Tri-cellular
FIGURE 1 – SUBDIVISION OF THE TERRITORY IN CELLS
Off-Air Repeaters are proposed as a valid and economical solution to optimize the cell coverage of the
territory and irradiate shadow area as an alternative to solutions requiring dedicated Radio-Bases (Figure 2).
FIGURE 2 – RADIO-ELECTRICAL PROBLEMS IN CELL NETWORK COVERAGE
Shadow Zone
2Mbit radio connection
MicroBTS solution Repeater solution
BTS
μ
BTS
BTS
Source
Re
p
eater
Shadow Zone
The repeater costs are 50% lower
than with the solution
μ
BTS