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<h2>GSM-WCDMA cell re-selection and inter-system handover</h2>

<p>For a dual mode GSM/WCDMA mobile, GSM-WCDMA Inter-System
Handover enables the measurements and cell re-selection of neighbour WCDMA
RAN cells while the MS has been camped on a GSM cell in the idle state.</p>


<p>GSM-WCDMA Inter-System Handover deals with handovers that
occur between the GSM and the WCDMA RAN. The handovers can take place from
the GSM BSS to WCDMA RAN and vice versa when the dual mode GSM/WCDMA MS is
in a dedicated state.</p>


<p>The dual mode GSM/WCDMA mobiles are divided into two categories:
GPRS and non-GPRS capable mobiles. There are both common and category-specific
operator parameters for the adjustment of mobile functionality in the idle
state, packet idle mode, dedicated state and packet transfer mode.</p>


<p>The figure below illustrates handovers that are based on
the load and coverage situation in the serving cell. There are also handovers
that are based on traffic and services.</p>


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