Beam-Specific Timing Advance for Uplink Signal Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face issues with intra-cell interference due to the use of a single timing advance value for uplink transmissions, which leads to misalignment of uplink signals exceeding the cyclic prefix, causing reception interference.
Innovation Solution
Implementing a method to determine and utilize distinct timing advance command values for different uplink beams within the same serving cell, based on beam-specific indications, to ensure precise alignment and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single timing advance value is used for all uplink carriers in the same TAG, then the system complexity is reduced and ease of operation is improved, but uplink signal alignment precision deteriorates causing signals to exceed the cyclic prefix and increase intra-cell interference
Solution Approach 1:
The patent segments the uplink carriers within a TAG into different beam groups, where each beam group is assigned a separate timing advance value. This segmentation allows precise alignment control for each beam while maintaining manageable system complexity through organized grouping.
Solution Approach 2:
The patent applies local quality by assigning different timing advance values to different beam groups based on their specific transmission characteristics. Each beam group receives customized timing adjustment tailored to its local propagation conditions, improving overall alignment precision.
2Manufacturing precision
If multiple timing advance values are assigned to different beam groups within the same TAG, then uplink signal alignment precision is improved and intra-cell interference is reduced, but the system complexity and device complexity increase
Solution Approach 1:
The patent implements a unified timing advance management mechanism that handles both single-value and multi-value scenarios through the same procedural framework. The base station and terminal use universal procedures for determining, indicating, and applying timing advance values across different beam groups.
Solution Approach 2:
The patent introduces a beam group dimension to the timing advance structure, organizing multiple timing advance values in a hierarchical manner. This dimensional organization allows the system to manage complexity by structuring timing advance information in layers rather than treating all values equally.
3Reliability
If beam-specific timing advance commands are implemented, then uplink reception quality is improved by aligning signals within the cyclic prefix, but the difficulty of detecting and measuring timing advance information increases
Solution Approach 1:
The patent uses beam group indicators as intermediaries between the timing advance values and the uplink transmissions. These indicators simplify the detection process by providing a direct mapping between beam groups and their associated timing advance values, reducing the complexity of timing advance management.
Solution Approach 2:
The patent employs reference signals and beam indications that copy or represent the timing advance information in a simplified form. The terminal can determine timing advance values through these representative indicators rather than directly measuring complex timing parameters.
Data Source
AI summary
Methods, apparatus and systems for configuring timing advance information in a wireless communication are disclosed. In one embodiment, a method performed by a wireless communication device is disclosed. The method comprises: determining a first set of beam indications and a second set of timing advance command (TAC) values, wherein each beam indication in the first set is associated with a respective TAC value in the second set; and obtaining, for indication an uplink transmission to a wireless communication node, an indication comprising a TAC value from the second set.