Wireless Node SRS Timing Error Control for Positioning Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly 5G-RAN, face challenges in achieving accurate positioning due to limitations in Radio Access Technology (RAT) positioning methods using NR signals, especially in indoor environments where GNSS is ineffective, and there is a need for enhanced reporting mechanisms to improve timing error group (TEG) indication for better positioning performance.
Innovation Solution
The proposed method involves transmitting specific information blocks and reference signals in SRS resources, where the first information block indicates a terminal capability value set and the second information block indicates multiple time values, ensuring that the transmission timing error does not exceed a specified value, and utilizing CSI reporting to accurately indicate TEGs, thereby improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional UE capability reporting is used without TEG concept, then the reporting structure is simple, but positioning accuracy deteriorates due to insufficient timing error indication
Solution Approach 1:
The UE capability reporting is segmented into multiple information blocks: first information block for terminal capability value sets, second information block for TEG indications, and third information block for SRS resource set associations. This segmentation allows detailed timing error indication while maintaining organized structure.
Solution Approach 2:
The patent introduces a new dimension (TEG - Timing Error Group) to the existing UE capability reporting framework. By adding TEG indications as a separate dimension alongside terminal capability values, the system achieves more precise positioning without fundamentally restructuring the entire reporting mechanism.
2Measurement precision
If multiple TEGs are indicated for different panels, then positioning accuracy improves, but information block complexity increases
Solution Approach 1:
The patent uses indexing and reference mechanisms where the second information block indicates TEGs through compact representations rather than full detailed specifications. Each panel's TEG information is efficiently copied/referenced rather than fully duplicated, reducing redundancy.
Solution Approach 2:
The information blocks are designed with multi-functionality: the first information block serves both capability indication and TEG association purposes; the second information block provides TEG indications that apply across multiple panels and scenarios. This universality reduces overall complexity despite handling multiple TEGs.
3Reliability
If timing error control is enforced within specified values, then positioning performance improves, but transmission timing constraints increase
Solution Approach 1:
The patent establishes timing error constraints and TEG indications in advance through capability reporting before actual positioning measurements occur. By preliminarily defining acceptable timing error ranges and associating them with specific SRS resource sets, the system ensures reliable positioning without real-time timing control complexity.
Data Source
AI summary
The node firstly transmits a first information block and a second information block, the first information block indicating a first terminal capability value set, with candidates for the first terminal capability value set including K1 terminal capability values, and the second information block indicating multiple first-type time values, and the first information block and the second information block both indicating a first time value; and transmits a reference signal in each SRS resource of a first time-frequency resource set, the first time-frequency resource set comprising at least one SRS resource; the first time-frequency resource set is known at a location-based service center, and a transmission timing error of a reference signal transmitted in any SRS resource of the first time-frequency resource set does not exceed the first time value. This application improves the accuracy of positioning measurement under multi-panel terminals and optimizes system performance.