Communication Apparatus Flexible Timing Control

The patent applies local quality by configuring different timing advance values for different terminal devices based on their individual propagation delays. Each terminal device receives a customized timing advance parameter from the base station, allowing precise timing control tailored to each device's specific location and channel conditions, thereby resolving the contradiction between simplified fixed control and precise individualized control.

The patent implements preliminary action by having the base station pre-calculate and determine appropriate timing advance values for each terminal device based on their propagation delays before actual data transmission begins. This preliminary configuration of timing parameters simplifies the subsequent transmission process, as terminal devices can directly apply the pre-determined timing advance values without requiring complex real-time calculations, thus reducing operational complexity while maintaining precision.

The patent applies parameter changes by dynamically adjusting the timing advance parameter for each terminal device based on its propagation delay characteristics. The base station measures or estimates the propagation delay for each device and configures an appropriate timing advance value, thereby compensating for differential delays and preventing inter-symbol interference. This parameter adjustment approach maintains low control overhead while effectively mitigating propagation delay interference.