Uplink Timing Control for Joint Channel Estimation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication networks, controlling uplink transmission timing to ensure time-alignment while maintaining joint channel estimation is challenging, as timing adjustments between bundled slots can disrupt joint channel estimation across those slots.
Innovation Solution
A method where a wireless device determines whether to apply a timing advance adjustment based on specific conditions, such as the timing of uplink transmissions and transmission parameters, to maintain phase consistency and facilitate joint channel estimation, allowing for selective application of timing adjustments during bundled slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If timing advance adjustment is applied to control uplink transmission timing, then time-alignment of uplink transmissions is improved, but joint channel estimation across bundled slots is disrupted
Solution Approach 1:
The patent implements dynamic timing advance adjustment where the timing advance value is updated based on measured timing errors from bundled slot transmissions. The system adaptively modifies the timing advance parameter to maintain time-alignment while preserving phase consistency across bundled slots, resolving the contradiction between timing precision and estimation reliability.
Solution Approach 2:
The patent changes the timing advance parameter dynamically based on measured timing errors. By adjusting this parameter in response to actual transmission timing deviations, the system achieves both time-alignment precision and maintains the phase consistency required for reliable joint channel estimation across bundled slots.
2Manufacturing precision
If timing advance command is issued to far wireless devices, then uplink transmission time-alignment is improved, but transmission timing control complexity increases
Solution Approach 1:
The patent implements a self-service mechanism where wireless devices autonomously measure their own timing errors from bundled slot transmissions and apply appropriate timing advance adjustments. This self-measurement and self-correction approach reduces the need for complex base station-controlled timing adjustments while achieving precise time-alignment.
Solution Approach 2:
The patent employs feedback mechanisms where timing error measurements from bundled slot transmissions are used to adjust timing advance values. This closed-loop feedback system automatically corrects timing deviations, simplifying the overall control complexity while maintaining precise time-alignment across all wireless devices.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A wireless device (12, 50) obtains a window of time for bundling of a set of uplink transmissions (20) on a carrier or bandwidth part. The wireless device determines whether or not to apply a timing advance adjustment (16) within the window of time. The timing advance adjustment comprises an adjustment to a transmission timing of an uplink transmission on the carrier or bandwidth part. The wireless device transmits the uplink transmission on the carrier or bandwidth part during the window of time using a transmission timing which is in accordance with the determining. The determining is based on whether the timing advance adjustment is indicated by a received timing advance command (18) or whether the timing advance adjustment is due to a detected error in downlink timing.