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<h3>GSM-WCDMA Inter-System Handover interaction with other
features and functionalities</h3>

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<h4>BSC
Initiated Traffic Reason Handover (TRHO)</h4>

<p>When deciding on an initiation of a BSC Initiated TRHO,
both the completed BSC Initiated TRHOs and the load decrease of the serving
cell due to an inter-system handover (ISHO) are taken into consideration.
Correspondingly, when deciding on an initiation of an ISHO, both the completed
ISHOs and the load decrease of the serving cell due to a BSC Initiated TRHO
are taken into consideration.</p>


<p>Both of the conditions above are valid, when a new BSC-initiated
TRHO, or ISHO are evaluated after either a previous TRHO or ISHO, but before
a new load information report has been received.</p>


<p>For more information, see <em>RF Power Control
and Handover Algorithm</em> in BSC/TCSM documentation.</p>
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<h4>GPRS</h4>

<p>GPRS affects the visibility of the ISHO parameters which
are defined only for GPRS-capable mobiles.</p>


<p>The GPRS-related parameters that are visible only if GPRS
is activated are <span class="parameter-sem">GPRS FDD Cell Reselect Offset</span>
and <span class="parameter-sem">GPRS Minimum FDD Threshold</span>. The <span class="parameter-sem">GPRS
Threshold To Search WCDMA RAN Cells</span> parameter is not influenced by the
GPRS and is therefore visible if only ISHO is enabled.</p>


<p>For more information, see <em>(E)GPRS in
BSC</em> in BSC/TCSM documentation.</p>
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<h4>Support
of PCCCH/PBCCH</h4>

<p>Support of PCCCH/PBCCH is needed if the PSI messages are
to be sent in the PBCCH.</p>
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<h4>Common
BCCH Control</h4>

<p>Common BCCH Control decreases the maximum number of neighbour
GSM cells and BA frequencies.</p>


<p>For more information, see <a href="NED?action=retrieve&amp;identifier=dn02222031&amp;edition=5&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=nov2921823201#nov2921823201" onclick="sync(this);return true" shape="rect">Common BCCH</a>.</p>
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<h4>Inter-System Network-Controlled Cell Re-selection</h4>

<p>GSM-WCDMA Inter-System Handover has to be activated before Inter-System
Network-Controlled Cell Re-selection can be taken into use.</p>


<p>For more information, see <a href="NED?action=retrieve&amp;identifier=dn04111132&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=sep2341624741#sep2341624741" onclick="sync(this);return true" shape="rect">GSM/EDGE-WCDMA
Inter-System Network-Controlled Cell Re-selection</a>.</p>
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<h4>IMSI-Based Handover</h4>

<p>GSM-WCDMA Inter-System Handover has to be activated before IMSI-Based
Handover can be taken into use.</p>


<p>For more information, see <a href="NED?action=retrieve&amp;identifier=dn04111074&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=aug24164111#aug24164111" onclick="sync(this);return true" shape="rect">IMSI-Based
Handover</a>.</p>
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