Sidelink PRS Parameter Adjustment for Congestion-Aware Positioning

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Solution Overview

Problem

In sidelink positioning scenarios, resource allocation methods lead to increased channel congestion and interference among UEs, affecting positioning accuracy due to collisions in shared resource pools.

Innovation Solution

Adjust transmission parameters of sidelink positioning reference signals based on channel quality parameters and positioning priorities, including CBR, CR, and SL RSSI, to optimize resource usage and reduce interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple UEs share the dedicated resource pool/shared resource pool for sidelink positioning, then resource utilization is improved, but channel congestion increases and resource collisions occur

Engineering Contradiction:

Improveresource utilizationVSAvoidchannel congestion

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent dynamically adjusts transmission parameters (power, time resources, frequency resources) of SL PRS based on channel quality parameters (CBR, CR, RSSI) and positioning priority. When channel congestion is detected, the system changes transmission parameters to avoid collisions and reduce interference, thereby maintaining resource utilization while mitigating channel congestion effects.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If multiple UEs share the dedicated resource pool/shared resource pool for sidelink positioning, then resource utilization is improved, but positioning accuracy deteriorates due to interference

Engineering Contradiction:

Improveresource utilizationVSAvoidpositioning accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent implements priority-based differential treatment where high-priority positioning tasks receive enhanced resource allocation and transmission parameters while low-priority tasks receive reduced resources. This local quality differentiation ensures that critical positioning operations maintain high accuracy even in congested environments, while overall resource utilization remains efficient.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system continuously monitors channel quality parameters (CBR, CR, RSSI) and adjusts SL PRS transmission parameters accordingly. This feedback mechanism enables dynamic optimization of positioning accuracy by adapting to changing channel conditions, reducing interference effects while maintaining efficient resource usage.

Inventive Principle:

Principle #23Feedback

3Device complexity

If uniform resource allocation is used for SL PRS transmission, then implementation complexity is reduced, but positioning accuracy deteriorates due to interference and collisions

Engineering Contradiction:

Improveimplementation complexityVSAvoidpositioning accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent transitions from static uniform resource allocation to dynamic adaptive allocation. Transmission parameters for SL PRS are continuously adjusted based on real-time channel quality parameters and positioning priority. This dynamic approach maintains relatively simple implementation through standardized adjustment rules while significantly improving positioning accuracy by adapting to changing channel conditions.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP4716347A1Method for adjusting transmission parameter, communication device, apparatus, and storage medium

Publication Date: 2026.03.25 DATANG MOBILE COMM EQUIP CO LTD

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AI summary

Embodiments of the present disclosure provide a method for adjusting a transmission parameter, a terminal, an apparatus, and a storage medium. The method comprises: on the basis of a channel quality parameter and/or a positioning priority of a sidelink, adjusting a transmission parameter of a sidelink positioning reference signal.