Timing resolution for devices with long sleep cycles

摘要

Timing resolution for user equipments (UEs) that operate using a discontinuous reception (DRX) mode that includes various sleep cycles may be addressed through selection of various alternative wake up procedures. A UE selects a wake-up procedure based on the length of the sleep cycle. The UE may use details of the sleep cycle, including a time offset or timing uncertainty associated with the sleep cycle, when selecting the wake-up procedure. The UE may select to obtain system timing information either directly from a serving cell or non-serving cell in sync with the serving cell or may select to perform either a one-step or two-step pre-wake up procedure in order to obtain the system timing. Once the UE obtains the system timing or determines a wake-up procedure, it performs timing correction before the scheduled wake-up times between the sleep cycles.

主权项

1. A method of wireless communication, comprising:
entering, by a user equipment (UE), a sleep cycle in accordance with a configuration of the UE by a wireless network; selecting, by the UE, a wake-up procedure based on a length of the sleep cycle, wherein the selected wake-up procedure comprises:
waking prior to expiration of the sleep cycle; andacquiring system timing information based on a common reference signal when the length of the sleep cycle is less than a threshold value; and performing a cell detection, by the UE, in accordance with the selected wake-up procedure.