Uplink Resource Mapping for Consistent CSI Repetition Decoding

The patent applies parameter changes by dynamically adjusting PT-RS port selection based on the repetition index and configured parameters. The UE determines which PT-RS ports to use for each repetition based on formulas involving the repetition index, ensuring that the coded CSI bits remain consistent across repetitions while allowing flexible uplink transmission. This resolves the contradiction by changing the port selection parameter systematically rather than using fixed or completely variable ports.

The patent applies preliminary action by having the UE determine timing advance adjustments and synchronization error compensation in advance before transmission. The UE calculates the timing advance based on downlink reference signals and pre-determines which uplink transmissions should be dropped or multiplexed based on predefined timing windows. This preliminary preparation ensures that soft combining can be performed correctly at the base station without requiring complex real-time synchronization correction.

The patent converts the harmful effect of synchronization errors into a beneficial filtering mechanism. By defining timing windows based on synchronization error thresholds, the system automatically identifies and drops or multiplexs transmissions that would be corrupted by synchronization errors, while allowing through transmissions that can be reliably combined. This transforms the synchronization error problem into a useful criterion for selecting quality transmissions for soft combining.