Handling of radio frequency front-end group delays for round trip time estimation
摘要
說明書
An exemplary user equipment (UE) is disclosed. The UE may comprise a communication device, a processor and a memory configured to determine a UE group delay (GD) comprising a UE transmission GD and a UE reception GD. The UE transmission GD may indicate a time interval between a measured transmission time of a UE Tx signal transmitted from the UE and an actual transmission time of the UE Tx signal leaving the UE. The UE reception GD may indicate a time interval between an actual arrival time of a UE Rx signal at the UE and a measured arrival time of the UE Rx signal at the UE. The communication device, the processor and the memory are also configured to receive, from a network entity, one or more round trip time (RTT) measurement (RTTM) signals on RTTM resources comprising downlink (DL) physical layer resources. Each RTTM signal may comprise an RTTM waveform. The communication device, the processor and the memory are further configured to determine one or more RTT response (RTTR) payloads for one or more RTTR signals. Each RTTR signal may correspond to one or more of the received RTTM signals and may comprise an RTTR waveform and the RTTR payload. The communication device, the processor and the memory are yet further configured to transmit, to the network entity, the one or more RTT response (RTTR) signals on RTTR resources comprising uplink (UL) physical layer resources. For each RTTR signal, a transmission timing of the RTTR waveform may be determined based on the UE total GD, or the RTTR payload may be determined based on the UE total GD, or both.
