User Manual

1. Preface

Personal mobile communication is now part of daily life and persons have

come to expect a robust network that meets their increased demand for an

always-on network that provides seamless coverage and unlimited bandwidth

at high speeds. Cellular repeaters are an integral part of achieving this goal.

A cellular tower in a non-metro environment typically supports a large number

of users but is affected by a relatively small coverage footprint. Therefore, the

average number of users who can access it is limited and a large amount of

channel resources go unused. The best way of solving this problem is to use

repeaters to extend the BTS coverage to fully utilize the telecommunication

resources. Hence cellular repeaters are no longer considered as peripheral

devices to cover blind areas in the network but as part of the core network

itself. Extending coverage and maximizing the available network resources

and revenue growth for the operator.

The complete coverage approach is not only a prerequisite for a high quality

mobile cellular network, but also a factor that attracts users. From this point

of view, a network operator should first consider providing a radio network

architecture with complete coverage in mind. This includes seamless

coverage in urban areas, heavy traffic areas, office buildings, supermarkets,

and hotels as the first step. Cellular repeaters successfully aid in

accomplishing this.

With this in mind, JDTECK has focused on successfully developing advanced

repeaters that are applicable to any mobile network and indoor distributed

antenna system (DAS). Repeaters are available to support any technology or

frequency in use today.

Because a large amount of BTS or Node B devices are deployed in densely

populated urban areas, there is usually no large blind area, therefore

repeaters are predominantly used to provide coverage inside buildings, sub-

ground locations or rural outdoor areas. Typically, radio frequency (RF)

repeaters are used when optical fibers are not available in buildings or when

using a fiber solution is not cost effective.

Since the number of repeaters on a cellular network usually increases with

the number of buildings to be covered in a specific sector, multiple repeaters

may end up feeding from one BTS or Node B. In view of this, the design of

the DAS is extremely important to maintain an acceptable noise floor and

thus achieve seamless integration to the macro network especially in densely

populated areas.

Figure 1 shows an indoor application of repeaters. (I-DAS)

Figure 2 shows an outdoor application of repeaters. (O-DAS)