DAPS Failure Recovery and MRO for 5G Handovers

The patent implements preliminary failure detection by starting a handover timer upon receiving handover command information and monitoring for RLF or handover failure before the handover is complete. This early detection mechanism allows the system to identify potential handover failures (Too Early, Too Late, or Wrong Cell) during the handover process itself, enabling timely recovery actions rather than waiting for failure to manifest

The patent establishes a feedback loop where the UE transmits assistant information (including handover failure type, timing, and measurement data) back to the network after detecting handover failures. The network uses this feedback to perform MRO and adjust handover parameters, creating a continuous improvement cycle that enhances handover reliability while managing system complexity through intelligent automation

The patent applies local quality by transmitting different types of assistant information based on the specific failure scenario and network configuration. The assistant information includes selectively reported elements such as handover failure type (Too Early, Too Late, Wrong Cell), timing information, and measurement data, allowing the system to provide precise failure characterization only where and when needed, rather than uniform comprehensive reporting for all failures

The patent implements partial action by transmitting assistant information selectively rather than for every possible handover failure. The network can configure which failure types trigger assistant information transmission, and the UE reports only the necessary subset of failure data required for effective MRO, avoiding excessive signaling while maintaining sufficient precision for network optimization