Wireless Uplink Power Adjustment for Overlapping Timing Groups
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Solution Overview
Problem
Existing LTE technologies face challenges in managing multiple timing advance groups, leading to excessive timing differences between carriers that can cause interference and deteriorate network performance due to overlapping uplink transmissions and power limitations.
Innovation Solution
Implementing mechanisms for multiple timing advance groups (TAGs) with dynamic power management and synchronization techniques to adjust uplink transmission timing, allowing parallel transmission of SRS, PUCCH, and PUSCH signals, even in power-limited scenarios, by configuring cells into primary and secondary TAGs and using specific synchronization signals for each group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple timing advance groups are implemented with dynamic power management, then parallel transmission of uplink signals is enabled, but device complexity increases
Solution Approach 1:
The patent divides the timing advance management into multiple independent groups (first TAG and second TAG), each with its own timing advance value and set of carriers. This segmentation allows parallel transmission on different carrier groups with different timing advances, enabling improved productivity while managing complexity through modular organization of timing advance parameters and carrier assignments.
2Object-affected harmful factors
If timing differences between carriers are reduced, then interference is minimized, but transmission flexibility decreases
Solution Approach 1:
The patent segments carriers into different timing advance groups, allowing each group to have optimized timing differences suitable for its specific interference conditions. Carriers within the same group maintain controlled timing differences to minimize interference, while different groups can have different timing characteristics to maintain transmission flexibility and adaptability to various channel conditions.
Solution Approach 2:
The patent applies different timing advance values and timing management strategies to different carrier groups based on their specific requirements. Each timing advance group can be independently configured with appropriate timing parameters, allowing local optimization of interference management for each group while maintaining overall system flexibility through selective application of timing advance corrections.
Data Source
AI summary
Wireless communications are described. A wireless device may be configured to transmit a first signal via a first cell group that may overlap in time with a second signal via a second cell group. The wireless device may adjust a signal transmission power of at least one of the first signal or the second signal. Additionally or alternatively, the wireless device may drop at least one of the first signal or the second signal. Adjusting and/or dropping at least one of the first signal or the second signal may be based on the overlap in time of these signals satisfying a duration threshold and a total power to transmit the first signal and the second signal exceeding a power threshold.