Reference Manual

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Product Description 4 (33)

1.2 RBS 2106 – Double Your Capacity with the same footprint

Ericsson’s GSM radio base station RBS 2106 facilitates capacity expansion without the

need for new sites. The RBS 2106 provides convenience without compromise for GSM

operators.

Today, the mobile penetration has exceeded 40 percent in 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 if 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 2106 is a means of addressing this need.

With the RBS 2106, the requirement on channel separation is decreased for configurations

with filter combiners (900 and 1800MHz). 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 current single TRU. To meet the operators’ need for faster

data communication solutions, the RBS 2106 can be equipped with an EDGE capable

version of the dTRU. The RBS 2106 has the capacity to handle EDGE on all twelve

transceivers.

The RBS 2106 comes with two extremely flexible combiners CDU_G (800, 900,1800 and

1900MHz) and CDU_F (900 and 1800MHz). These combiners make 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.

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 2106 is

equipped with three CDU-G.