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<div class="div">
<h1>Overview of Nokia EDGE</h1>

<p>Enhanced Data rates for Global Evolution (<a href="NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id010415#id010415" onclick="openSmallPopup(event,'NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id010415#id010415');return false" shape="rect" target="_blank">EDGE</a>),
introduced to GSM/GPRS standard Release 99, boosts GSM/GPRS network capacity
and data rates to meet the demands of wireless multimedia applications and
mass market deployment. The Nokia EDGE Solution includes Enhanced GPRS (EGPRS)
for packet switched data.</p>


<p>EDGE uses 200 kHz radio channels, which are the same as
the current GSM channel widths. From a technical perspective, EDGE BSS allows
the GSM and GPRS core network to offer a set of new radio access bearers.
EDGE is designed to improve spectral efficiency through efficient link utilisation
with GMSK and 8-PSK modulation schemes, which can be alternated on the same
radio slot according to radio channel conditions. With new modulation, EDGE
increases the radio interface data throughput in average three-fold compared
to today's GSM and boosts both circuits switched and packet switched services.
The maximum standardised data rate per time slot will triple, and the peak
throughput, with eight time slots in the radio interface, can be up to 473
kbit/s.</p>


<p>Since it is fully based on GSM, introducing EDGE to the
existing network requires relatively small changes to the network hardware
and software. EDGE does not entail any new network elements. The operators
need not make any changes to the network structure or invest in new regulatory
licenses. Oversea roaming of GSM/EDGE is better than that of any other radio
technology.</p>


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<h2>Benefits of Nokia EDGE solution</h2>

<p>EDGE is compatible with GSM/GPRS equipment and services
as well as all new emerging 3G services. The Nokia EDGE solution was created
to give operators a competitive edge, to help them generate more revenues,
and to strengthen their market share by offering a wide selection of modern
3G value-added services. Nokia's design target is to protect operators’ existing
investments and provide a smooth and cost-efficient evolution from GSM/GPRS
to 3G by optimising the use of the radio resources with the existing infrastructure
platform as a basis.</p>


<p>Backed by Nokia’s long, solid expertise in GSM and GPRS
systems and a comprehensive knowledge of 3G systems, the Nokia EDGE solution
provides standardised EDGE features from the very beginning. Nokia EDGE offers
greater capacity and a higher Quality of Service (QoS) functionality with
existing site densities and frequency plans. </p>


<p>The Nokia EDGE solution provides an unlimited EDGE growth
path, not only for macrocellular and microcellular solutions, but also for
local area solutions, such as indoor and picocellular. It improves operators’
competitiveness in those segments with the most demanding subscribers. EDGE
is especially attractive for GSM 800, GSM 900, GSM 1800, and
GSM 1900 operators who wish to offer mobile multimedia applications at an
early stage because EDGE offers means to provide 3G services for end users
in the existing GSM frequencies.</p>


<p>Compared to the data services currently available from
GSM, EDGE provides significantly higher capacity than GPRS. While GPRS offers
improved data services, EDGE provides more speed for GPRS. With EDGE, operators
realise their full revenue potential through incorporating international roaming
in a convenient and cost-effective manner. Operators with <a href="NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id05524#id05524" onclick="openSmallPopup(event,'NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id05524#id05524');return false" shape="rect" target="_blank">UMTS</a>
licenses can offer 3G capabilities to all end users in a cost-effective manner.
Wideband Code Division Multiple Access (<a href="NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id010040#id010040" onclick="openSmallPopup(event,'NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id010040#id010040');return false" shape="rect" target="_blank">WCDMA</a>) combines
well with EDGE for data intensive applications that require data user rates
up to 473 kbp/s.</p>


<p>Benefits of EDGE include, for example, the following:</p>


<ul>
<li><p>migration path to wireless multimedia
services: operators can increase their data revenues by offering new, attractive
services</p>
</li>
<li><p>movement to third generation applications</p>
</li>
<li><p>flexibility in pricing due to lower
costs for data capacity in high-speed data applications, potentially leading
to lower price per bit</p>
</li>
<li><p>fast network implementation by building
full coverage using existing sites: EDGE requires no new network elements
and the EDGE capability can be introduced incrementally to the network</p>
</li>
<li><p>optimised network investment</p>
</li>
<li><p>flexible, demand-based deployment of
data capacity</p>
</li>
<li><p>improved service quality and end user
satisfaction: increased data capacity and higher data throughput decrease
blocking and response times for all data services</p>
</li>
<li><p>lower tariffs, resulting from more
efficient networks</p>
</li>
</ul>
</div>


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<div class="topic">
<h2>Required network changes</h2>

<p>EDGE technology is introduced on the existing GSM network
and does not compromise network performance and quality.</p>


<a name="dec1621048571" shape="rect"></a>
<div>
<img alt="urn:mars:dn02242098:3:en:global:cgm_fixed:data:data" border="0" src="NED?action=retrieve&amp;identifier=dn02242098&amp;edition=3&amp;language=en&amp;coverage=global&amp;encoding=gif&amp;component=data&amp;item=data" /><p class="figure-caption">Figure: Impacts of EDGE on the mobile network (ETSI release 99 implementation)</p>
</div>


<p>EDGE support requires minimum hardware changes for existing
networks. Only GSM/EDGE TRX Radio Frequency (RF) and Baseband units need to
be installed — all other units stay the same. GSM/EDGE and GSM TRXs can co-exist,
or operators can create a configuration using all-EDGE components.</p>


<p>The EDGE capability is available with Nokia MetroSite EDGE
Base Transceiver Station (BTS) and Nokia UltraSite EDGE BTS solutions as an
easy unit upgrade. Nokia UltraSite EDGE BTS also provides site evolution to
WCDMA since it houses both EDGE and WCDMA carriers. The Nokia UltraSite EDGE
solution offers the traditional benefits of high capacity and coverage along
with full data support.</p>


<p>GSM/EDGE-capable TRXs for Nokia MetroSite EDGE BTS and
Nokia UltraSite EDGE BTS are compatible with GSM TRXs and fit into the same
slot in the BTS cabinets. In addition to providing EDGE services, GSM/EDGE <a href="NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id04885#id04885" onclick="openSmallPopup(event,'NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id04885#id04885');return false" shape="rect" target="_blank">TRX</a>s are fully GSM compatible and support GSM voice,
data, <a href="NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id08864#id08864" onclick="openSmallPopup(event,'NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id08864#id08864');return false" shape="rect" target="_blank">HSCSD</a>, and GPRS plus EGPRS. They are also backward
compatible with all legacy GSM terminals.</p>


<p>These solutions provide an unlimited EDGE growth path and
full functionality for micro and macrocellular networks. The rest of the network
requires supporting software releases and capacity expansions for higher data
rates. EDGE terminals will be available in line with the network infrastructure.
EDGE terminals continue to support all GSM and GPRS services.</p>
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