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<h2>Benefits for applications</h2>

<p><em>Dynamic Frequency and Channel Allocation (DFCA)</em></p>


<p>BSS Synchronisation provides a platform for applications with very high
performance benefits. This can be measured as an increase in the spectral
efficiency of the system. The performance increase can be traded for a capacity
increase by tightening the effective frequency reuse. This trade-off is automatically
controlled by DFCA. </p>


<p>The TSL level of synchronisation for the BTSs allows the BSC to get
the precise knowledge of the interference sources when a new channel assignment
is to be performed. Combining this information with the timeslot and frequency
usage data makes it possible to choose the optimum radio channel for the connection.
DFCA receives information available in the BSC and retrieved from other BSCs
when the system is synchronised. With this information, DFCA dynamically calculates
the C/I of all the TSL and frequency combinations potentially applicable to
a connection. Based on this, the BSC is able to perform more efficient channel
and frequency allocations. By controlling the interference, considering the
interference mitigation capabilities of the connection type, the spectral
efficiency is maximised.</p>


<p>For more information, see <a href="NED?action=retrieve&amp;identifier=dn04111086&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=sep2441454301#sep2441454301" onclick="sync(this);return true" shape="rect">Dynamic
Frequency and Channel Allocation (DFCA)</a>.</p>


<p><em>MAIO cluster planning</em></p>


<p>Synthesised frequency hopping (RF hopping) allows local interference
avoidance by using MAIO management. Typically, MAIO management is used to
avoid interference between the sectors of the same BTS site since the base
stations located in the same site normally share the same clock source. BSS
Synchronisation makes a synchronised frame clock signal available across the
network, thus allowing the expansion of the MAIO management across different
sites. When all the base stations sharing the same MA list and hopping sequence
number are synchronised with each other and use the same frame number, then
co-channel interference between any two TRXs can be avoided by allocating
different <span class="parameter-sem">MAIO Offset</span> values to them. Therefore
MAIO management can also be applied between BTS sites, making it possible
to produce the most optimised MAIO plans that shift the interference away
from the areas susceptible to interference.</p>
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