Secondary Cell Timing Reference Selection in LTE sTAG

The patent segments the timing reference definition by introducing separate timing reference cells for different secondary cells within a secondary timing advance group. Each secondary cell has its own timing reference cell, allowing independent timing management for each cell while maintaining overall system coordination. This segmentation resolves the complexity by distributing the timing reference responsibility across multiple cells rather than using a single reference for all cells.

The patent uses timing reference cells as intermediary elements that mediate between the eNodeB and secondary cells. These reference cells serve as intermediate timing sources that the secondary cells use to determine their uplink transmission timing. The intermediary timing reference cells simplify the timing management by providing standardized reference points that all secondary cells can reliably use for synchronization.

The patent segments the timing management by creating separate timing advance groups (TAGs) for different secondary cells. Each TAG can have its own timing advance value and reference cell, allowing independent timing control for each secondary cell. This segmentation enables different timing advances for different cells while managing complexity through structured organization of cells into distinct groups with dedicated timing parameters.

The patent applies local quality by allowing each secondary cell to have its own specific timing reference and timing advance parameters tailored to its local conditions. Instead of using a uniform timing management approach for all secondary cells, the system customizes timing parameters for each cell based on its specific network node and propagation characteristics, improving synchronization reliability while managing complexity through localized optimization.