Mobile Station Uplink Power Control in Carrier Aggregation

The mobile station performs preliminary monitoring of the downlink carrier in deactive state to acquire reference signals before path loss estimation is required. By proactively collecting signal information when the carrier is still accessible, the system prepares accurate path loss data in advance, avoiding the need to monitor the deactive carrier at the moment of estimation.

The patent introduces an intermediary mechanism where the mobile station uses the most recently monitored reference signal from the deactive downlink carrier as a mediator for path loss estimation. Instead of directly monitoring the deactive carrier (which provides inaccurate data), the system uses stored historical reference signal data as an intermediate reference to calculate path loss, thereby maintaining estimation accuracy without active monitoring.

The mobile station performs path loss estimation preliminarily by storing reference signal information from the deactive downlink carrier before it becomes fully inactive. This preliminary action allows the system to use pre-acquired data for subsequent path loss calculations without needing to continuously monitor the deactive carrier, thereby maintaining accuracy while minimizing energy consumption.

The mobile station serves itself by maintaining a local cache of reference signal data from the deactive carrier. Instead of relying on continuous external signaling or frequent monitoring of the deactive carrier, the system uses its own stored historical data to perform self-contained path loss estimation, eliminating the need for energy-consuming continuous monitoring.

The mobile station implements feedback by comparing the scheduled uplink transmission requirements with the accuracy status of available path loss estimation data. When the path loss estimation from the deactive carrier is determined to be inaccurate, the system provides feedback to discard the uplink transmission scheduling, preventing interference-generating transmissions while maintaining overall system reliability through alternative scheduling decisions.

The mobile station performs preliminary verification of path loss estimation accuracy before uplink transmission is scheduled. By proactively checking whether the path loss data is reliable (from active or recently monitored deactive carriers), the system takes preliminary anti-action to prevent inaccurate transmissions that would cause interference, thereby ensuring transmission quality before the actual uplink signal is sent.