Timing Advance Group Segmentation in Carrier Aggregation
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Solution Overview
Problem
Current mobile communication systems face challenges in supporting high-speed data services, large data traffic, increased user connections, low latency, and energy efficiency, particularly in determining timing advance (TA) requirements for new radio (NR) carrier aggregation (CA) scenarios.
Innovation Solution
A method for determining various requirements, TA granularity, and TA maximum value is proposed to efficiently support timing advance in NR carrier aggregation, allowing for efficient uplink signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If carrier aggregation is implemented in NR systems, then data traffic capacity and user connection capability are improved, but timing advance determination complexity and system configuration difficulty increase
Solution Approach 1:
The patent segments the carrier aggregation system into multiple timing advance groups (TAGs), where each TAG independently manages timing advance for specific component carriers. This segmentation allows the system to handle multiple carriers without requiring a single complex timing advance mechanism for all carriers, thereby reducing overall determination complexity while maintaining high data traffic capacity.
Solution Approach 2:
The patent implements dynamic timing advance adjustment mechanisms where timing advance values can be independently adjusted for different timing advance groups based on their specific propagation delay requirements. This dynamic approach enables the system to adapt to changing channel conditions and carrier configurations, reducing configuration difficulty while supporting high data traffic capacity.
2Measurement precision
If multiple timing advances are supported in NR carrier aggregation, then uplink transmission accuracy is improved, but signaling overhead and control complexity increase
Solution Approach 1:
The patent merges timing advance management for multiple component carriers into grouped structures (TAGs), where common timing advance parameters are shared within each group. This merging reduces signaling overhead by avoiding redundant transmission of identical timing advance information across multiple carriers, while still maintaining precise uplink transmission accuracy through group-specific timing adjustments.
Solution Approach 2:
The patent creates universal timing advance group structures that can accommodate multiple component carriers with different propagation characteristics. Each TAG serves multiple functions: managing timing for multiple carriers, reducing signaling overhead through parameter sharing, and maintaining transmission accuracy through group-specific adjustments. This multi-functionality reduces overall control complexity while preserving precision.
Data Source
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AI summary
Disclosed is a method for transmitting, by a user equipment, an uplink signal using carrier aggregation in a wireless communication system. More specifically, the method includes transmitting a first uplink signal to a base station on a first component carrier included in a first timing advance group (TAG); and transmitting a second uplink signal to the base station on a second component carrier included in a second TAG.