Uplink Transmission Timing Across Multiple Timing Advance Groups
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing multiple timing advance groups, particularly in multicarrier communication systems, leading to inefficiencies in uplink transmission timing alignment across different carriers.
Innovation Solution
The implementation of multiple timing advance groups (TAGs) allows for synchronized uplink transmission timing across serving cells, with primary and secondary TAGs, enabling dynamic configuration and management through RRC signaling and timing advance commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple timing advance groups are implemented for synchronized uplink transmission, then uplink timing alignment is improved, but device complexity increases
Solution Approach 1:
The patent divides the timing advance management into multiple independent Timing Advance Groups (TAGs), where each TAG can be independently configured and managed. This segmentation allows precise control over different carrier groups while maintaining overall system coordination, resolving the contradiction by organizing complexity into manageable segments that improve timing alignment without overwhelming device resources
Solution Approach 2:
The patent implements dynamic configuration of TAGs through RRC signaling, allowing the system to adaptively create, modify, or release TAGs based on current network conditions and carrier aggregation requirements. This dynamic approach enables the system to maintain optimal timing alignment while adjusting complexity levels to match actual operational needs rather than maintaining fixed high complexity
2Adaptability or versatility
If dynamic configuration of timing advance groups is implemented, then adaptability is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by implementing dynamic TAG configuration only when and where needed through RRC signaling, rather than continuously or universally. The system can selectively configure TAGs for specific carrier groups based on actual requirements, reducing unnecessary signaling overhead while maintaining adaptability for scenarios that demand it
Solution Approach 2:
The system uses feedback mechanisms where the network monitors timing alignment status and carrier aggregation configurations, then sends targeted RRC signaling to configure or modify TAGs only when changes are needed. This feedback-driven approach maintains high adaptability while minimizing signaling overhead by avoiding unnecessary configuration messages
3Object-generated harmful factors
If multiple timing advance groups are used to manage different carrier groups, then transmission overlap is reduced, but management complexity increases
Solution Approach 1:
By segmenting carriers into distinct TAGs with independent timing advance values, the patent prevents transmission overlap between different carrier groups. Each TAG manages its own timing independently, eliminating interference while the segmented structure keeps management complexity organized and tractable
Solution Approach 2:
The system performs preliminary configuration of TAGs and their associated timing advance values before carriers are activated or before potential overlaps can occur. This advance preparation ensures that timing alignment is already established when transmissions begin, preventing overlap without requiring complex real-time management interventions
Data Source
AI summary
Systems, methods, and apparatuses are described for wireless communications. A wireless device may transmit an uplink signal via a cell of a cell group. Transmission timing of the uplink signal may be based on a cell of the cell group and a timing adjustment associated with a different cell group.