Signal Power Adjustment for Overlapping Wireless Cell Groups
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing multiple timing advance groups, leading to potential interference and performance degradation due to differing uplink transmission timings across carriers.
Innovation Solution
The implementation of multiple timing advance groups (TAGs) with synchronized uplink timing references, allowing for dynamic configuration and management of serving cells, including primary and secondary TAGs, and utilizing RRC signaling for configuration and reconfiguration to maintain optimal timing alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple timing advance groups are used to manage uplink transmissions across multiple carriers, then uplink transmission timing alignment is improved, but device complexity and signal processing overhead increase
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 of uplink timing for different carrier groups while isolating the complexity into manageable units, resolving the contradiction between timing alignment precision and overall system complexity.
Solution Approach 2:
The patent establishes a default timing advance group configuration that is pre-configured and automatically applied when no specific TAG configuration is provided. This preliminary action eliminates the need for complex dynamic configuration decisions during operation, reducing real-time processing complexity while maintaining timing alignment precision.
2Productivity
If multiple timing advance groups with different uplink transmission timings are implemented, then carrier aggregation performance is improved, but inter-carrier interference increases
Solution Approach 1:
By segmenting carriers into different timing advance groups with distinct timing references, the patent enables independent timing optimization for each group. This segmentation allows carriers within the same TAG to be synchronized, minimizing inter-carrier interference while still supporting carrier aggregation across multiple TAGs with different timings.
Solution Approach 2:
The patent applies different timing advance configurations locally to different timing advance groups rather than uniformly across all carriers. This local quality approach allows each TAG to have optimized timing characteristics suited to its specific carrier set, improving overall carrier aggregation performance while controlling interference through localized timing management.
3Adaptability or versatility
If dynamic reconfiguration of timing advance groups is performed, then network adaptability is improved, but signaling overhead and processing time increase
Solution Approach 1:
The patent pre-configures default timing advance group parameters and structures that can be quickly activated without extensive signaling. This preliminary preparation allows the network to adapt to changing conditions by simply switching between pre-configured TAG configurations, reducing both signaling overhead and processing time while maintaining high adaptability.
Solution Approach 2:
The patent implements dynamic timing advance group reconfiguration that allows flexible addition, modification, and removal of TAGs based on network conditions. The system can dynamically adjust the number and configuration of TAGs to match actual carrier aggregation needs, achieving high network adaptability with optimized signaling efficiency through on-demand reconfiguration.
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.