CG-SDT Timing Advance Validation Using Beam Quality Criteria
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Solution Overview
Problem
Current configured grant small data transmission (CG-SDT) systems are limited in their ability to provide timing advance (TA) validation criteria for IoT devices, failing to customize transmissions based on downlink signal quality measurements, beam indexes, positioning information, and device capabilities, leading to inefficient device operation.
Innovation Solution
Implementing enhanced TA validation criteria in CG-SDT configurations that consider user equipment (UE) capability, RRC state, DL beam configuration, positioning information, and power saving considerations, allowing for customized configurations and joint optimization with wake-up signaling and paging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current CG-SDT systems use basic TA validation without customization, then device complexity is reduced, but transmission efficiency and reliability deteriorate due to inability to adapt to device characteristics and signal quality
Solution Approach 1:
The patent applies local quality by customizing TA validation criteria according to specific device characteristics (mobility patterns, capability indicators) and local signal conditions (downlink signal quality measurements). Different UEs receive tailored validation criteria rather than a uniform approach, improving reliability while managing complexity through targeted customization.
Solution Approach 2:
The patent changes parameters by introducing multiple validation dimensions including mobility indicators, capability indicators, and downlink signal quality thresholds. These parameter variations enable adaptive TA validation that responds to changing device states and channel conditions, resolving the contradiction between reliability and complexity.
2Reliability
If enhanced TA validation criteria are implemented with multiple validation dimensions, then transmission reliability is improved, but processing overhead and device complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring validation criteria parameters (mobility indicators, capability indicators, signal quality thresholds) before CG-SDT transmission. The UE prepares validation data in advance based on pre-configured parameters, reducing real-time processing complexity while maintaining high reliability through comprehensive validation.
Solution Approach 2:
The UE performs self-validation using locally available measurements and pre-configured criteria, reducing the need for network-side processing. The device independently evaluates mobility indicators, capability indicators, and signal quality against configured thresholds, improving reliability while minimizing additional processing overhead.
3Measurement precision
If TA validation is performed without considering downlink signal quality, then processing speed is maintained, but transmission accuracy deteriorates
Solution Approach 1:
The patent applies partial action by selectively validating TA based on downlink signal quality thresholds. When signal quality exceeds the threshold, full validation with precise measurements is performed. When below threshold, validation may be skipped or simplified, reducing processing time while maintaining accuracy when conditions permit.
Data Source
AI summary
Technologies and techniques are disclosed for managing timing advance (TA) validation of configured grant small data transmission (CG-SDT). A scheduling entity may receive downlink signal quality measurements for downlink beams from a scheduled entity, as well as a CG-SDT configuration request. The scheduling entity may transmit a CG-SDT configuration to the UE in response to receiving the CG-SDT configuration request, where the CG-SDT configuration includes a timing advance (TA) validation criteria based on downlink signal quality measurements meeting configured thresholds.