3GPP Work Item description

This page contains informal descriptive text only.  See master WID page for further details.

Feature: Handover of dedicated and shared resources while in dual transfer mode

DTM enhancements for reduction of the PS service interruption in DTM were completed in Release 6 and focused on improving both the release of the RR connection while in dual transfer mode and the initiation of the RR connection while in packet transfer mode.
However, the PS service interruption caused by a (CS) handover in DTM prevents  real-time PS services with strict delay requirements from being used in DTM (e.g. voice call while gaming, voice call while sharing real-time video). While such scenarios are possible in UTRAN, service continuity must also be ensured between UTRAN and GERAN.

It is thus necessary to minimize the PS service interruption at handover in DTM to enable the deployment of any real-time PS service also in DTM and ensure service continuity with UTRAN.

The objective of this work item is to study possible solutions for handover of dedicated and shared resources while in DTM in order to meet QoS requirements for conversational PS services and potentially standardize a solution.