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<td align="center" colspan="1" rowspan="1" width="20%"><?NED5 annotation?>
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<h2>Interworking with other features</h2>

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<h3>Activated PCU/PCU2</h3>

<p>Before activating NCCR, there must be a PCU or PCU2 installed and active
in the BSC enabling the GPRS packet control functions.</p>
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<h3>Double BCCH Allocation List</h3>

<p>If there is no PBCCH in the cell and a BCCH Allocation List (BA list)
is used, then the MS does not send Packet Enhanced Measurement Report messages
but only Packet Measurement Report messages to the BSC. This is because GPRS
BSIC Description is not broadcast if a BA list is used.</p>


<p>For more information, see <em>Double BCCH Allocation List</em> in
BSC/TCSM documentation.</p>
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<h3>Enhanced Quality of Service (EQoS)</h3>

<p>EQoS Quality Control (QC) may trigger NCCR as one of the corrective
actions after detecting degradation in the quality of the serving cell.</p>


<p>The NCCR streaming TBF offset functionality of power budget NCCR is
available only if EQoS is in use.</p>


<p>EQoS target cell admission control is needed in intra-PCU cell changes
to avoid commanding MSs changing to highly loaded cells.</p>


<p>For more information on EQoS, see <em>Enhanced Quality of Service
(EQoS)</em> in BSC/TCSM documentation.</p>
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<h3>IMSI Based Handover (IBHO)</h3>

<p>IMSI is not taken into account with NCCR.</p>
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<h3>Network Assisted Cell Change (NACC)</h3>

<p>After the PCU has determined a new cell for the MS, the PCU sends data
concerning the target cell to the MS to make the cell change faster. Currently
NACC is supported for intra-BSC cell changes.</p>


<p>For more information, see <a href="NED?action=retrieve&amp;identifier=dn04111144&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=sep2341657531#sep2341657531" onclick="sync(this);return true" shape="rect">Overview
of Network Assisted Cell Change (NACC)</a>.</p>
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<h3>PCU memory, overload protection, and capacity
enhancement</h3>

<p>NCCR enhances the PCU overload protection in two ways. In a lower level
PCU overload situation, NCCR reduces the PCU load by ignoring every second
measurement report sent by the NCCR-controlled MSs. In a higher level PCU
overload situation, NCCR moves the MSs from network-controlled to autonomous
cell Re-selection. This is done one-by-one as measurement reports are received
from the MSs.</p>
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