Multicarrier Uplink Power Control Using Multiple Timing Advance Groups
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Solution Overview
Problem
Existing multicarrier communication systems face challenges in efficiently managing multiple timing advance groups, leading to inefficiencies and potential overlap issues in uplink transmissions.
Innovation Solution
The implementation of multiple timing advance groups (TAGs) allows for synchronized uplink transmissions by grouping serving cells with the same time alignment, using a primary and secondary TAG configuration, and employing RRC signaling for dynamic TAG reconfiguration and power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple timing advance groups are implemented to synchronize uplink transmissions, then timing alignment across multiple carriers is improved, but device complexity increases
Solution Approach 1:
The system divides timing advance management into multiple independent groups (TAG0, TAG1, etc.), where each group manages a subset of component carriers with specific timing relationships. This segmentation allows precise timing control for each group while keeping the overall system manageable through modular organization.
Solution Approach 2:
The patent introduces a new dimension of organization by grouping component carriers into timing advance groups rather than managing each carrier individually. This dimensional change from carrier-level to group-level management reduces complexity while maintaining timing precision through hierarchical control structures.
2Adaptability or versatility
If dynamic TAG reconfiguration is implemented through RRC signaling, then adaptability of timing alignment is improved, but signaling overhead increases
Solution Approach 1:
The system enables dynamic reconfiguration of timing advance groups through RRC signaling, allowing the network to adapt timing alignment parameters based on changing channel conditions, carrier activation states, and traffic requirements. This dynamic capability ensures optimal timing performance in varying operational scenarios.
Solution Approach 2:
The patent implements adaptability by allowing modification of TAG configuration parameters including adding, removing, and reconfiguring component carriers within groups. These parameter changes enable the system to adapt to different deployment scenarios while managing signaling overhead through efficient RRC message structures.
3Productivity
If multiple TAGs are used to manage uplink transmissions, then transmission efficiency is improved, but power management complexity increases
Solution Approach 1:
Power management is segmented and associated with specific timing advance groups rather than applied uniformly across all carriers. This allows the device to manage power consumption on a per-TAG basis, optimizing transmission efficiency for active groups while reducing power management complexity through localized control.
Solution Approach 2:
The patent applies local quality by enabling differentiated power management strategies for different timing advance groups based on their specific requirements. Each TAG can have customized power control parameters, allowing efficient resource utilization in high-activity groups while conserving power in low-activity groups.
Data Source
AI summary
Methods, apparatuses, and systems are described for wireless communications. Cells may be grouped into a plurality of cell groups. A wireless device may transmit or drop one or more of a plurality of signals.