Ovrrbu-bts. Pdf

AirLink 8000
1/30/00
BASE TRANSCEIVER STATION
Release 1.00
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BASE TRANSCEIVER STATION
1.1 OVERVIEW
The Base Transceiver Station (BTS) consists of a single rack or cabinet that houses the necessary
elements for a point to multi-point RF communication network. A single BTS may contain 1 or 2 Radio
Base Units (RBUs). Each RBU contains all necessary Transmit/Receive equipment required for the
operation of a single sector or cell. A modular design provides for multiple co-located BTSs.
The architecture of the system is flexible, and can accommodate small or large numbers of subscribers. It
can also be adapted for use in rural, suburban, and urban environments.
1.1.1 INTRODUCTION
The Eagle Telephonics, Inc. AirLink 8000 system is a WLL Specific system based on digital radio
technology. Specifically, it employs direct sequence, spread spectrum based, Synchronous CDMA (S-
CDMA) techniques over the air link to provide local access to subscribers. It offers very high quality,
highly reliable service at costs that are very competitive with the wireline solutions. The system has very
high spectral efficiency and thus can provide wireline quality service with limited available bandwidth. Its
large dynamic range allows it to be deployable in virtually all environments, meeting specific needs of
dense urban, suburban, and rural communities in an economical way.
Some of the key attributes of the system are:
-- Wireline voice quality delivered at 32 or 64 kbps.
-- High throughput for data and fax applications with 32 or 64 kbps throughput.
-- High service reliability with good tolerance for noise and ingress.
-- Secure airlink that is virtually impossible to break into or eavesdrop.
-- CLASS services are supported.
-- Enhanced services like priority/emergency calling - both inbound and outbound.
-- Full switching services available.
For the network operator, the system provides several benefits:
-- Advanced graphical operator interface.
-- Equipment cost per access line is low and very competitive with average wireline costs.
-- In typical deployments, over 70% of the per line equipment cost is on the subscriber end; thus most of the 
investment needs to be made only when signing up paying customers.
-- Quick and easy installation and provisioning process.
-- Low maintenance costs reduce the life cycle costs and total cost of ownership.
-- Theft deterrent system (stolen or misused equipment will not operate). With properly implemented 
procedures, even installation/maintenance staff cannot beat the system.
-- Ability to provide high quality digital data services at 64 to 256 kbps and beyond increases the appeal to 
business and discriminating customers and provides opportunities for premium revenue producing 
services.
-- Economically viable over a wide range of subscriber densities and hence can be used for stand alone as 
well as overlay networks. It can also easily grow with the subscriber population.
-- The system will grow with customer needs and be able to provide higher bandwidth data/video services.