User equipment, base station, and method for time synchronization
AssigneePurplevine Innovation Company Limited
InventorChun-Che Chien
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Abstract
A user equipment (UE) executes a time synchronization method. The UE transmits a synchronization-specific uplink signal and receives a synchronization-specific downlink signal in response to the synchronization-specific uplink signal. The synchronization-specific uplink signal may comprise a dedicated preamble for propagation-delay-related signaling associated with at least one of timing advance (TA), propagation delay (PD), and propagation delay compensation (PDC) between the UE and a serving base station of the UE.
Claims51
A time synchronization method executable in a user equipment (UE), comprising:
- transmitting a synchronization-specific uplink signal, wherein the synchronization-specific uplink signal comprises a preamble for propagation-delay-related signaling, the propagation-delay-related signaling is associated with timing advance (TA) between the UE and a serving base station of the UE;
- receiving a synchronization-specific downlink signal in response to the synchronization-specific uplink signal;
- receiving a UE-side propagation delay compensation indication;
- and
- determining, based on the received UE-side propagation delay compensation indication, whether to perform UE-side TA-based propagation delay compensation for reference time information (RTI);
- wherein the UE-side propagation delay compensation indication indicates whether the UE-side TA-based propagation delay compensation is activated.
A time synchronization method executable in a base station, comprising:
- receiving a synchronization-specific uplink signal, wherein the synchronization-specific uplink signal comprises a preamble for propagation-delay-related signaling, the propagation-delay-related signaling is associated with timing advance (TA) between a user equipment (UE) and the base station serving the UE;
- transmitting a synchronization-specific downlink signal in response to the synchronization-specific uplink signal;
- and
- transmitting a UE-side propagation delay compensation indication, wherein the UE-side propagation delay compensation indication indicates whether the UE-side TA-based propagation delay compensation for reference time information (RTI) is activated.
Dependencies are inferred from the claim text.