Conditional Handover Failure Timer in Unlicensed Bands

The failure timer is started in advance during the conditional handover execution phase, before the handover is fully completed. This preliminary timing ensures that if the handover fails, the timer has already been running and can immediately trigger failure recovery procedures without waiting for additional confirmation, thereby improving handover reliability while managing complexity through predetermined timing logic

The system implements continuous monitoring of handover conditions with feedback mechanisms that track whether the target cell's channel occupancy meets the required threshold. This feedback loop allows the system to detect handover failures early and trigger appropriate recovery actions, resolving the contradiction by providing the reliability benefits of active monitoring while using efficient feedback protocols to minimize the complexity overhead

The patent extracts the channel occupancy reporting function from the standard handover signaling流程, eliminating separate reporting messages. Instead, the UE uses the already-acquired channel occupancy information internally to determine whether to execute the conditional handover, thereby reducing signaling overhead while maintaining measurement precision through local evaluation rather than remote reporting

The UE performs self-service by autonomously evaluating the channel occupancy conditions using its own measurements without requiring external verification or reporting. The UE compares the measured channel occupancy against the configured threshold and independently decides whether to proceed with handover, thus eliminating redundant signaling while preserving measurement accuracy through the UE's own sensing capabilities