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<div class="div">
<h1>Overview of GSM/EDGE-WCDMA Inter-System NCCR (IS-NCCRS)</h1>

<p>GSM/EDGE-WCDMA Inter-System NCCR enables the BSC to initiate
cell re-selection from a GSM cell to a WCDMA RAN cell. <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=id016172#id016172" 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=id016172#id016172');return false" shape="rect" target="_blank">IS-NCCRS</a>
provides full control to the network over the inter-system cell re-selection
operation. </p>


<p>IS-NCCRS uses two cell re-selection criteria:</p>


<ul>
<li><p>service-based cell re-selection</p>
</li>
<li><p>coverage-based cell re-selection</p>
</li>
</ul>


<p>In service-based cell re-selection, IS-NCCRS uses service
priority tables, which direct services to the most suitable system, for example,
speech services to the GSM system and data services to the WCDMA system. The
service priority tables are stored in the core network together with the subscriber
information. This means that the priorities can be subscriber-specific or
group-specific. </p>


<p>Coverage-based cell re-selection can be used either when
a WCDMA cell is available or when GSM coverage ends. In such cases the BSC
tries to find a target WCDMA cell and order a cell change as soon as possible. </p>


<p>IS-NCCRS is an application SW product and requires a valid
licence in the BSC. For more information on licencing, see <a href="NED?action=retrieve&amp;identifier=dn04170615&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=oct2641456515#oct2641456515" onclick="sync(this);return true" shape="rect">Licensed
application software</a> and <a href="NED?action=retrieve&amp;identifier=dn04149427&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=oct1841615431#oct1841615431" onclick="sync(this);return true" shape="rect">Overview
of BSS licensing</a>.</p>


<p>Network Controlled Cell Re-selection (<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=id016174#id016174" 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=id016174#id016174');return false" shape="rect" target="_blank">NCCR</a>)
must be installed before IS-NCCRS can be taken into use.</p>


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<div class="topic">
<h2>Benefits
of the Nokia solution </h2>
</div>


<p>IS-NCCRS offers the following benefits:</p>


<ul>
<li><p>efficient inter-system cell re-selection</p>
</li>
<li><p>support for service-based NCCR (SGSN
service UTRAN CCO BSSGP procedure)</p>
</li>
<li><p>system-controlled cell re-selection,
where data users can be allocated according to your services or needs</p>
</li>
<li><p>possibility to select the WCDMA network
as soon as it is available or when GSM coverage ends, depending on your choice.</p>
</li>
</ul>


<p>For more information, see <em>Inter-system Network-Controlled Cell
Re-Selection</em> in BSC/TCSM documentation.</p>
</div>


<div class="related-topics">
<h2>Related Topics</h2>

<ul class="related-topics-list">
<li><a href="NED?action=retrieve&amp;identifier=dn04109346&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=jun224151451#jun224151451" onclick="sync(this);return true" shape="rect">System impact of
GSM/EDGE-WCDMA Inter-System NCCR (IS-NCCRS)</a></li>
<li><a href="NED?action=retrieve&amp;identifier=dn04111705&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=sep23416212265#sep23416212265" onclick="sync(this);return true" shape="rect">Overview
of implementing GSM/EDGE-WCDMA Inter-system NCCR (IS-NCCRS)</a></li>
</ul>
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