Dynamic Doppler-Tracking SRS Configuration for High-Mobility Uplink

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless communication systems face challenges in accurately estimating uplink Doppler parameters, particularly in high mobility environments, leading to inadequate selection of uplink DMRS configurations and inefficient Doppler pre-compensation, which affects communication reliability and efficiency.

Innovation Solution

Implementing flexible and dynamic configurations for Doppler tracking SRS resource sets, allowing base stations to adjust time gaps and resource settings based on changing channel conditions, UE speed, and deployment parameters, thereby enhancing Doppler parameter estimation accuracy and reducing overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If fixed SRS resource configurations are used, then device complexity is reduced, but Doppler parameter estimation accuracy deteriorates in high mobility environments

Engineering Contradiction:

ImproveDoppler parameter estimation accuracyVSAvoidSRS resource configuration complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent implements dynamic SRS resource configurations where the network entity can adjust time gaps, frequency offsets, and resource allocations based on detected channel conditions and UE mobility patterns. This transforms static configurations into adaptive ones that respond to changing Doppler conditions, directly resolving the contradiction between fixed simplicity and dynamic accuracy.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes key parameters including SRS time gaps, frequency offsets, and resource allocations dynamically based on detected Doppler conditions. By modifying these parameters in response to channel state information and mobility detection, the system achieves accurate Doppler estimation without requiring overly complex fixed configurations.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If frequent SRS transmissions are used for Doppler tracking, then measurement precision improves, but signal overhead increases

Engineering Contradiction:

ImproveDoppler parameter estimation accuracyVSAvoidSRS overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent implements periodic SRS transmissions with dynamically adjustable periods and time gaps. Instead of continuous transmissions, the system uses periodic bursts optimized for Doppler tracking, reducing overall overhead while maintaining sufficient measurement precision through strategically timed transmissions that capture mobility patterns.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system applies partial action by transmitting SRS resources selectively based on detected mobility conditions. When high Doppler is detected, more frequent transmissions are used; when conditions are stable, transmissions are reduced. This partial application of full transmission resources optimizes the balance between measurement precision and overhead.

Inventive Principle:

Principle #16Partial or excessive action

3Adaptability or versatility

If adaptive SRS configurations are implemented, then adaptability to different mobility scenarios improves, but device complexity increases

Engineering Contradiction:

ImproveConfiguration flexibility for different mobility scenariosVSAvoidConfiguration management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements feedback mechanisms where the network entity detects channel conditions and mobility patterns, then uses this information to dynamically adjust SRS configurations. The feedback loop continuously monitors performance and adapts resource allocations, providing versatility across mobility scenarios while managing complexity through automated closed-loop control rather than manual configuration management.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20260012308A1Configurations and dynamic signaling for doppler tracking sounding reference signal resource sets

Publication Date: 2026.01.08 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information for a sounding reference signal (SRS) resource set, the configuration information indicating a usage type for the SRS resource set associated with Doppler tracking and a configuration for one or more associated SRS resource identifiers. Some configuration parameters of the SRS resource set and the associated SRS resource identifiers can be dynamically reconfigured in order to allow adaptive SRS time domain pattern for enhanced Doppler parameter estimation and/or synchronization loop tracking, among other examples. The UE may transmit one or more SRSs in accordance with the configuration or dynamic reconfiguration information for the SRS resource set and the associated SRS resources based at least in part on receiving the configuration and/or reconfiguration information. Numerous other aspects are described.