User's Manual

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1-52

Lucent Technologies – Proprietary

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401-703-454

FOA Draft Issue 1

January, 2006

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Overview of the Flexent‚ Modular Cell 4.0B cabinet

installation

Base station location

The location of each cell site is carefully planned by RF engineers so

that a continuous radio coverage of a geographical area is maintained.

This planning will ensure that service to each mobile user is

uninterrupted as the user moves throughout the coverage area. At the

center of each cell site is a base station, which is available for a number

of different RF deployment configurations based on the size of the cell,

the expected voice/data call load, its indoor/outdoor location, and the

base station release (when the base station was installed).

AUTOPLEX® and Flexent®

platforms

In some markets, Lucent CDMA wireless networks are deployed on

two platforms: the earlier AUTOPLEX system, using Series II base

stations, and the newer Flexent system, using smaller, more compact

modular base stations. The two platforms can co-exist within the same

network, as shown. Because the Series II base stations are no longer

manufactured, the Flexent base station will be used for all future

installations.

The primary difference between Series II and Flexent base stations is

that the former contains dedicated radio control data processing

circuitry. For voice and 3G1X data calls in the Flexent system, radio

control data processing is centralized for all Flexent base stations by

the Mobility Management Application Processor (AP) in the mobile

switching center (MSC, Refer to the figure on Page 1-51). Additionally,

a Flexent base station can be configured to service 2G voice and 3G

voice/data calls, in addition to 3G 1xEV-DO high speed data

transmissions. Although 1xEV-DO can be collocated in the same base

station with 2G/3G voice service, its deployment is outside the MSC

domain and it requires a Radio Access Network (RAN) ground

network. Despite the versatility of the Flexent base station, handling

three technologies: 2G voice, 3G voice/data, and 3G 1xEV-DO high

speed data, base station installation is transparent of the technology.