UE Timing Configuration Selection for NR Bandwidth and SCS Changes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems, particularly in LTE and NR, face challenges in efficiently adjusting transmission timing due to variations in bandwidth and subcarrier spacing, leading to timing errors and inefficiencies in autonomous time adjustments.
Innovation Solution
The system allows user equipment (UE) to autonomously adjust transmission timing by selecting a Timing Error Limit (T_e_NR) and Maximum Autonomous Time Adjustment Step (T_q_NR) based on bandwidth (BW) and subcarrier spacing (SCS), using various design methodologies to account for different SCS levels, ensuring precise timing adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed timing parameters are used across all bandwidth and subcarrier spacing configurations, then device complexity is reduced, but timing accuracy deteriorates due to variations in bandwidth and subcarrier spacing
Solution Approach 1:
The patent applies dynamics by making timing parameters adaptive rather than fixed. The UE dynamically selects timing error limit and maximum autonomous time adjustment step based on the active bandwidth and subcarrier spacing configuration. This allows the system to optimize timing accuracy for each specific configuration while managing complexity through standardized selection rules defined in the patent.
Solution Approach 2:
The patent changes timing parameters (timing error limit and maximum autonomous time adjustment step) based on bandwidth and subcarrier spacing conditions. Different parameter values are selected according to the active configuration, allowing timing accuracy to be optimized for each scenario without requiring a completely separate system for each configuration.
2Productivity
If autonomous time adjustment is enabled, then transmission efficiency is improved, but timing errors increase due to variations in bandwidth and subcarrier spacing
Solution Approach 1:
The patent implements feedback mechanisms where the UE monitors timing conditions and adjusts autonomous time adjustment behavior based on observed timing errors. The system uses feedback from timing error measurements to refine the selection of maximum autonomous time adjustment step, balancing transmission efficiency with timing accuracy maintenance.
Solution Approach 2:
The patent applies preliminary action by pre-defining timing error limit and maximum autonomous time adjustment step values for different bandwidth and subcarrier spacing configurations. The UE selects appropriate parameters before autonomous time adjustment begins, preventing timing errors from escalating while maintaining transmission efficiency.
3Measurement precision
If timing parameters are optimized for specific bandwidth and subcarrier spacing configurations, then timing accuracy is improved, but adaptability across different configurations deteriorates
Solution Approach 1:
The patent achieves universality by creating a unified timing parameter selection framework that works across all bandwidth and subcarrier spacing configurations. The same patent mechanisms and selection rules apply universally, allowing the system to maintain timing accuracy optimization for each configuration while preserving adaptability through a single standardized approach.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
User equipment performs autonomous time adjustment that includes selecting a Timing Error Limit (i.e. Te_NR) and Maximum Autonomous Time Adjustment Step (i.e. Tq_NR) based on bandwidth (BW) and subcarrier spacing (SCS). In one embodiment, given a certain downlink BW, if the SCS = x(kHz) and the Te_NR of this SCS is N, then the Te_NR of SCS = x/2(kHz) is 2*N. Given a certain downlink BW, if the SCS = x(kHz) and the Te_NR of this SCS is N, then the Te_NR of SCS = 2*x(kHz) is N/2. For example, given BW = 10MHz, if the Te_NR of SCS=30kHz is n*Ts_NR (TS_NR is the basic timing unit for NR system), then the Te_NR of SCS=60kHz is N/2*Ts_NR, and the Te_NR of SCS=15kHz is 2*N*Ts_NR.