UPLINK REFERENCE SIGNAL TRANSMISSIONS DURING POWER SAVING OPERATIONS
Methods, systems, and devices for wireless communications are described in which a user equipment (UE) may be configured for discontinuous reception (DRX) operations using wakeup signals. The UE may monitor periodic wakeup signal occasions for wakeup signals and, in the event that the UE detects a wakeup indication that the UE is to initiate an active duration, the UE may power on transmit/receive circuitry for communications with a base station. In an absence of receiving the wakeup indication, the UE may be configured to transmit an uplink reference signal (e.g., a sounding reference signal) to the base station in an inactive duration of a DRX cycle in some cases. The uplink reference signal may be measured at the base station and used to determine one or more parameters for subsequent communications with the UE.
1 . A method for wireless communication at a user equipment (UE), comprising:
monitoring a wakeup signal monitoring occasion in an inactive duration of a discontinuous reception cycle for a wakeup indication associated with a wakeup signal, wherein an active duration of the discontinuous reception cycle is initiated at the UE based at least in part on detection of the wakeup indication for the UE during the wakeup signal monitoring occasion; and
transmitting, based at least in part on an absence of the wakeup indication for the UE in the wakeup signal monitoring occasion, an uplink reference signal during a first time duration that is outside of the active duration of a first discontinuous reception cycle.