Reference Manual

Description 5 (37)
LRN/X-99:083 Rev F 2001-07-17 © Ericsson. Commercial in confidence
1.2 RBS 2206 – Double Your Capacity with the same footprint
Ericsson’s GSM radio base station RBS 2206 facilitates capacity expansion without the
need for new sites. The RBS 2206 provides convenience without compromise for GSM
operators.
Today, the mobile penetration has exceeded 70 percent in some mature markets and many
operators are experiencing an almost explosive subscriber growth. In addition, the usage
per subscriber is increasing. As a consequence, the operators must be able to handle more
traffic in their networks.
At the same time, finding new base station sites is becoming increasingly difficult. Each
new site requires building permission and extensive negotiations with landlords. The latter
is nowadays an often time-consuming procedure and when the operator is lucky to close the
deal, it often proves to be rather expensive.
As a result, the site space is a limiting factor for capacity growth and therefore it is of great
interest to the operators to stick to the existing sites as long as possible. The powerful RBS
2206 is a means of addressing this need. The RBS 2206 has some new powerful RF
features. With the RBS 2206, the requirement on channel separation is decreased for
configurations with filter combiners. The RBS 2206 also has better output power than
current RBS 2000 products. Another example of a cost saving feature is Extended Range
121 km. The double transceiver, dTRU, consists of two transceivers in one unit of the same
size as the classic single TRU. To meet the operators’ need for faster data communication
solutions, the RBS 2206 can be equipped with an EDGE capable version of the dTRU. The
RBS 2206 has the capacity to handle EDGE on all twelve transceivers.
The RBS 2206 comes with two new extremely flexible combiners, making it possible to
build one-sector, two-sector, three-sector and dual band (GSM 900/GSM 1800, GSM
800/1900 and GSM 800/1800) configuration in one cabinet. Examples on configurations
supported by the filter combiner (CDU-F) are 3x4, 2x6 and 1x12 in one cabinet (for GSM
900 and GSM 1800). The CDU-G combiner can be configured in two modes: capacity
mode and the coverage mode, which makes it very flexible. By running the CDU-G in
coverage mode, the output power from the combiner is increased by 3.5 dB, making it
perfect for rural sites or when fast rollout is required to a minimum cost. To build a 3x4
configuration, the RBS 2206 is equipped with three CDU-G.