Uplink Power Stability via Pathloss Filtering

The patent applies preliminary action by performing higher-layer filtering on the receive power of the pathloss estimation reference signal before using it to determine transmit power. The terminal device filters the reference signal received power (RSRP) multiple times to obtain a stable pathloss estimation value, ensuring that the filtering is completed before the transmit power determination. This preliminary filtering action resolves the contradiction by preparing accurate and stable pathloss estimation in advance, which then enables reliable and stable transmit power determination without instability issues.

The patent performs the filtering operation in advance as a preliminary action before the transmit power determination is needed. By filtering the reference signal received power multiple times beforehand to obtain a stable pathloss estimation value, the system prepares the necessary accurate data in advance. This eliminates the need to perform time-consuming multiple filtering operations at the moment when transmit power determination is required, thus resolving the contradiction between achieving high measurement precision through multiple filtering operations and minimizing time loss.

The patent resolves this contradiction by performing the filtering operation as a preliminary action in advance, before the effective time when transmit power determination is needed. The terminal device filters the reference signal received power multiple times beforehand to obtain a stable pathloss estimation value, ensuring that the filtering is completed prior to the moment when the pathloss estimation value becomes effective for transmit power determination. This timing arrangement allows sufficient filtering to be performed without delaying the actual transmit power determination, thus resolving the contradiction between achieving accurate pathloss estimation and maintaining fast power adjustment speed.