Wake-Up Signal Resource Set Design for 5G UE Power Efficiency

The patent implements discontinuous reception (DRX) cycles where the UE alternates between active monitoring periods and sleep periods. During DRX cycles, the UE monitors for wake-up signals periodically rather than continuously, reducing power consumption while maintaining data transmission responsiveness. The UE wakes up at predetermined intervals to check for incoming data, allowing it to balance between being responsive to data arrivals and conserving battery power during idle periods.

The patent employs wake-up signals that are transmitted before the UE needs to switch from power saving mode to network access mode. The base station sends a wake-up signal during the UE's sleep period if data is available, prompting the UE to wake up and switch to active mode in advance. This preliminary notification allows the UE to minimize its sleep duration and switch to active mode only when necessary, reducing data transmission latency while still benefiting from power saving during idle periods.

The patent divides the wake-up signal monitoring into multiple repetition levels, where each level corresponds to a different number of monitoring attempts or signal repetitions. Instead of monitoring all possible repetition levels simultaneously, the UE segments the monitoring process by attempting detection at progressively higher repetition levels only if previous attempts fail. This segmentation approach improves signal detection reliability for weak signals while avoiding the complexity of continuously monitoring all repetition levels, as the UE adapts its monitoring depth based on initial detection results.