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<h2>Lb interface</h2>

<p>The Lb interface is used to connect a standalone SMLC to
a BSC. Furthermore, the Lb interface feature contains a controlling functionality
for the allocation of location requests between Position Based Services in
BSC and the external stand-alone SMLC.</p>


<p>The Lb interface also supports:</p>


<ul>
<li><p>communication with LMU units in the
BSS</p>
</li>
<li><p>assistance data point-to-multipoint
broadcasting for GPS data</p>
</li>
<li><p>handling of deciphering keys for ciphered
broadcasting data from stand-alone SMLC</p>
</li>
</ul>


<p>The Lb interface is an application software in
BSC. Its optionality is controlled with the 2nd class parameter LB_USAGE.</p>


<p>For more details, see <em>User interface
of Location Services in BSC</em>, <em>BSS11114: Lb Interface
to BSC</em> and <em>BSC-SMLC Interface Specification</em>
in the BSC documentation set.</p>
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