<?xml version="1.0" encoding="utf-8" standalone="yes"?><html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>SW Support for AFC</title>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
<meta content="text/css" http-equiv="Content-Style-Type" />
<script src="NED?action=retrieve&amp;identifier=dn00188761&amp;edition=1&amp;language=none&amp;coverage=global&amp;encoding=javascript&amp;component=data&amp;item=data" type="text/javascript" xml:space="preserve">
</script>
<?conversion name="Pub2XHTML" version="2.0" source="urn:mars:dn0430517:1:en:global:publishing_online_1_0:data:data:*:*:*" date="2005-02-21T15:01:20Z"?>
<link href="NED?action=retrieve&amp;identifier=dn01158124&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=css&amp;component=data&amp;item=data" rel="stylesheet" title="Nokia Networks default online style" type="text/css" />
<meta content="draft" name="status" />
<?conversion name="SplitHTML" version="1.9" source="urn:mars:dn0430517:1:en:global:publishing_online_1_0:data:data:35:*:*" date="2005-02-21T15:01:20Z"?>
</head>
<body lang="en" xml:lang="en">
<p><a name="ned_top" shape="rect"></a>
<a name="ned_1" shape="rect"></a></p>

<a name="jan1751322618" shape="rect"></a>
<a name="p2xhtm-repid-1" shape="rect"></a>
<table width="100%">
<tr>
<td align="center" colspan="1" rowspan="1" width="20%"><?NED5 annotation?>
<br clear="none" /><?NED5 printview?>
</td>
<td align="center" colspan="1" rowspan="1" width="20%"></td>
<td align="center" colspan="1" rowspan="1" width="20%"></td>
<td align="center" colspan="1" rowspan="1" width="20%"></td>
<td align="center" colspan="1" rowspan="1" width="20%"><a href="NED?action=retrieve&amp;identifier=dn0430517_about&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_top#ned_top" onclick="openSmallPopup(event,'NED?action=retrieve&amp;identifier=dn0430517_about&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_top#ned_top');return false" shape="rect" target="_blank"><img alt="Document information" border="0" class="Metainfo" src="NED?action=retrieve&amp;identifier=dn01158003&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=gif&amp;component=data&amp;item=data" /></a></td>
</tr>
</table>


<div class="div">
<h1>SW Support for AFC</h1>

<p>AFC is a GSM900 Antenna Filter Unit with a 4-way hybrid
combiner and 8 Rx multicoupler outputs. The initial use of this will be to
support 8 TRX configurations, with 2 AFCs, using 2 Antennas with DF4.0 or
DF5.0 BTS SW, declaring the AFCs as AFEs. This has a minor problem with the
O&amp;M in which any Rx LNA faults or Tx VSWR alarm will each be reported
twice at the OMC.</p>


<p>Current BSC SW has full support for the following configurations:</p>


<ul>
<li><p>Up to 8 TRX cells with 2 AFCs </p>
</li>
<li><p>Up to 12 TRX cells with 3 AFCs</p>
</li>
<li><p>Cells with 2 AFCs and 2 AFEs to give
8 TRXs (low power) + 4 TRXs (high power) on 4 antennas.</p>
</li>
</ul>


<p>This feature allows operators to use RF hopping with 8
or 12 TRXs and only 2 or 3 antennas. Many operators are limited in the number
of antennas that they can use. RF hopping allows easier network planning and
more capacity in a given bandwidth.</p>


<p>The following pictures show principal connections for the
above mentioned configurations.</p>


<a name="feb2641362119" shape="rect"></a>
<div class="topic">
<h2>8
TRX AFC</h2>

<a name="apr154155511" shape="rect"></a>
<div>
<img alt="urn:mars:dn0468239:1:en:global:cgm_fixed:data:data" border="0" src="NED?action=retrieve&amp;identifier=dn0468239&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=gif&amp;component=data&amp;item=data" /><p class="figure-caption">Figure: 8 TRX AFC</p>
</div>
</div>


<a name="feb2641365020" shape="rect"></a>
<div class="topic">
<h2>12
TRX AFC</h2>

<a name="apr1541555562" shape="rect"></a>
<div>
<img alt="urn:mars:dn0468293:1:en:global:tiff:data:data" border="0" src="NED?action=retrieve&amp;identifier=dn0468293&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=gif&amp;component=data&amp;item=data" /><p class="figure-caption">Figure: 12 TRX AFC</p>
</div>
</div>


<a name="feb2641372621" shape="rect"></a>
<div class="topic">
<h2>4
TRX AFE + 8 TRX AFC ICE+</h2>

<a name="apr1541557293" shape="rect"></a>
<div>
<img alt="urn:mars:dn0468312:1:en:global:tiff:data:data" border="0" src="NED?action=retrieve&amp;identifier=dn0468312&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=gif&amp;component=data&amp;item=data" /><p class="figure-caption">Figure: 4 TRX AFE + 8 TRX AFC ICE+</p>
</div>
</div>
</div>
</body>
</html>