Wireless Device Cell Timing Management for Multicarrier Synchronization
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Solution Overview
Problem
Current multicarrier communication systems face challenges in managing multiple timing advance groups, leading to timing differences between component carriers that can result in network performance deterioration and unwanted interference due to excessive timing delays.
Innovation Solution
The implementation of multiple timing advance groups (TAGs) with dynamic timing alignment and power management mechanisms, allowing for parallel transmission of SRS, PUCCH, and PUSCH signals within specific thresholds to minimize timing differences and maintain network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple timing advance groups are managed in multicarrier communication systems, then the ability to support multiple component carriers is improved, but timing differences between carriers cause network performance deterioration and unwanted interference
Solution Approach 1:
The system segments component carriers into multiple timing advance groups (TAGs), where each TAG shares a common timing advance value. This segmentation allows independent timing management for different carrier groups, resolving the timing synchronization issue while maintaining support for multiple carriers.
Solution Approach 2:
The system dynamically adjusts timing advance values for different TAGs based on uplink timing differences. By continuously monitoring and adjusting timing advances, the system adapts to changing timing conditions between component carriers, preventing performance deterioration and interference.
2Manufacturing precision
If timing advance values are adjusted for each component carrier, then uplink timing alignment is improved, but system complexity increases due to multiple timing management requirements
Solution Approach 1:
The system merges component carriers with similar timing characteristics into the same timing advance group, allowing them to share a common timing advance value. This reduces the number of independent timing management requirements while maintaining precise uplink timing alignment for each carrier.
Solution Approach 2:
Each timing advance group serves multiple component carriers simultaneously, making the timing advance mechanism universal across different carriers. This multi-functionality reduces system complexity by eliminating the need for separate timing management for each individual carrier.
3Productivity
If parallel transmission of SRS, PUCCH, and PUSCH signals is allowed, then network efficiency is improved, but power constraints are exceeded due to simultaneous signal transmission
Solution Approach 1:
The system applies different power management strategies to different signal types (SRS, PUCCH, PUSCH) based on their specific requirements and characteristics. By optimizing power allocation locally for each signal type while allowing parallel transmission, the system maintains network efficiency without exceeding overall power constraints.
Data Source
AI summary
Methods and apparatuses are described for wireless communications. Cells may be grouped into a plurality of cell groups. A time adjustment may be determined and applied to uplink transmission timing of a cell group. A transmission timing difference between a first cell group and a second cell group may be determined. If the transmission timing difference exceeding a threshold, one or more devices may stop transmitting uplink signals via one or more secondary cells and/or may stop applying the timing adjustment for a cell group.