Positioning Reference Signal Timing for Double Differential Accuracy

The patent applies preliminary action by pre-configuring a double differential effective window (DDEW) that specifies a time interval within which target terminals and positioning reference units must send uplink sounding reference signals. This preliminary time constraint ensures that all measurement activities occur within a synchronized timeframe, eliminating cumulative oscillator frequency offset errors while preserving device operation flexibility through configurable window parameters.

The patent introduces an intermediary mechanism by using a location management function (LMF) that generates and distributes DDEW configuration information to all participating base stations and terminals. This intermediary coordinates the timing across the network without requiring direct peer-to-peer synchronization between devices, thereby improving measurement precision while managing complexity through centralized configuration management.

The patent applies dynamics by making the DDEW configuration parameters adjustable and scenario-specific. The location management function can dynamically configure different DDEW parameters (such as window duration and timing offsets) based on specific positioning requirements, network conditions, and service types. This allows the system to maintain measurement precision through synchronized timing while adapting to different positioning scenarios through flexible parameter configuration.