UE Inter-Frequency Measurement SSB Index Derivation

The patent applies preliminary action by pre-configuring the UE with the assumption that the measurement target cell is synchronized with the serving cell before inter-frequency measurement begins. This allows the UE to derive SSB index based on serving cell timing without performing actual PBCH decoding in the measurement target cell, thereby maintaining measurement precision while avoiding the throughput penalty of continuous PBCH decoding.

The patent uses serving cell timing information as an intermediary to bridge the measurement target cell and the serving cell. Instead of directly decoding PBCH in the measurement target cell, the UE uses the synchronized timing relationship (established through intermediary serving cell timing) to derive the SSB index, which eliminates the need for direct PBCH decoding while maintaining measurement accuracy.

The patent applies preliminary action by establishing the synchronization assumption before measurement begins. The UE is pre-configured to assume the measurement target cell is synchronized with the serving cell, allowing it to derive SSB index immediately based on serving cell timing without waiting for or performing PBCH decoding in the measurement target cell, thus eliminating measurement delay while maintaining accuracy.

The patent uses copying by deriving the SSB index in the measurement target cell based on a copy of the serving cell's timing information. Instead of performing original PBCH decoding in the measurement target cell, the UE copies the timing relationship from the serving cell to determine the SSB index, which eliminates the time-consuming decoding process while maintaining measurement accuracy.