Multicarrier Timing Advance Group Configuration for Unlicensed Spectrum

The patent divides the timing advance management into separate TAG (Timing Advance Group) configurations, where cells are grouped into different TAGs based on their timing characteristics. This segmentation allows independent timing management for different cell groups, reducing the overall system complexity while supporting carrier aggregation and dual connectivity for increased data traffic capacity.

The patent introduces a new dimension of timing management by implementing per-carrier timing advance adjustments in addition to the traditional uplink-downlink timing relationship. This allows for more granular control over timing parameters across multiple carriers, enabling the system to handle increased data traffic without overwhelming the PUCCH load on primary cells.

The patent applies different timing advance values and TAG configurations to different cell groups based on their specific propagation characteristics and timing requirements. This local quality approach ensures that each carrier or cell group maintains optimal timing synchronization independently, preserving synchronization precision while allowing multiple carriers to be aggregated for enhanced system capacity.

The patent dynamically adjusts timing advance parameters and TAG assignments based on channel conditions, carrier frequency, and propagation delays. By changing these parameters adaptively, the system maintains precise timing synchronization across multiple aggregated carriers, preventing synchronization degradation while maximizing system capacity.

The patent implements dynamic carrier selection and activation mechanisms where carriers can be selectively activated or deactivated based on traffic demand, channel conditions, and QoS requirements. The TAG configurations and timing advance parameters are dynamically adjusted to match the active carrier set, optimizing resource allocation efficiency while managing device complexity through automated control algorithms.

The system employs self-service mechanisms where the network automatically manages carrier activation, TAG configuration, and timing advance adjustments based on observed traffic patterns and channel conditions. This reduces the need for complex manual configuration and allows the system to optimize resource allocation dynamically without proportionally increasing device complexity.