Multi-Panel Uplink Timing Advance With Single-Value Derivation
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Solution Overview
Problem
In wireless communications systems, user equipment (UE) communicating with multiple transmission and reception points (TRPs) receives separate timing advance values for each TRP, leading to increased overhead and lower spectral efficiency.
Innovation Solution
The UE receives a single timing advance value from the base station, determining individual panel timing advance values based on this value and downlink signal timings, allowing efficient communication with multiple TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE receives separate timing advance values for each TRP, then communication reliability with multiple TRPs is improved, but signaling overhead increases and spectral efficiency decreases
Solution Approach 1:
The patent merges multiple timing advance values into a single timing advance value that applies to all panels. Instead of receiving separate timing advance values for each TRP, the UE receives one timing advance value and derives the necessary timing adjustments for each panel based on this single value and panel-specific timing information, thereby reducing signaling overhead while maintaining communication reliability
Solution Approach 2:
The single timing advance value serves multiple functions by being applied across all panels with different offset adjustments. This universal timing advance value can be used for all TRPs simultaneously, making the system more efficient while still supporting multi-panel communications with multiple TRPs
2Reliability
If the UE receives separate timing advance values for each TRP, then communication reliability with multiple TRPs is improved, but spectral efficiency decreases
Solution Approach 1:
The patent merges multiple timing advance values into a single timing advance value that applies to all panels. Instead of receiving separate timing advance values for each TRP, the UE receives one timing advance value and derives the necessary timing adjustments for each panel based on this single value and panel-specific timing information, thereby reducing signaling overhead while maintaining communication reliability
Solution Approach 2:
The patent changes the parameter approach by using a single timing advance value instead of multiple values. The system maintains reliability by adjusting this single parameter differently for each panel through offset calculations based on panel timing, thereby improving spectral efficiency while preserving communication quality
3Device complexity
If the UE receives a single timing advance value, then signaling overhead is reduced and spectral efficiency is improved, but timing precision for multiple panels may be compromised
Solution Approach 1:
The patent segments the timing advance adjustment into two parts: a common timing advance value that applies to all panels, and panel-specific offset adjustments that account for individual panel timing characteristics. This segmentation allows the system to maintain timing precision for each panel while using a single common timing advance value, thereby reducing signaling overhead
Solution Approach 2:
The patent applies local quality by making panel-specific timing adjustments based on individual panel characteristics. Each panel receives the same base timing advance value but applies different offsets based on its specific timing information, ensuring that each panel achieves optimal timing precision while the overall system uses a single timing advance value
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may communicate with a multiple transmission and reception points (TRPs) associated with a base station using multiple panels and each panel of the UE may be associated with a different timing advance value. Signaling of multiple timing advance values from the base station to the UE may be associated with large overhead. In some implementations of the present disclosure, the base station and the UE may support methods and algorithms for deriving multiple timing advance values from a single timing advance value. For example, the base station may transmit a timing advance value to the UE and the UE may derive a timing advance value for each panel of the UE based on the received timing advance value and a timing of downlink signals received at each of the panels of the UE.