Timing-Group Associations for Wireless Device Positioning Accuracy
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Solution Overview
Problem
Timing errors due to internal path delays between different antennas of a User Equipment (UE) introduce significant inaccuracies in positioning measurements, particularly in high-frequency wireless communication systems, impacting the accuracy of UE reception-transmission time difference measurements.
Innovation Solution
Implement mechanisms to account for timing errors by utilizing multiple measurements from different UE antenna panels, reporting antenna panel information, and compensating for internal path delays through signaling or pre-configuration, thereby improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple antenna panels are used for positioning measurements, then positioning accuracy is improved, but device complexity increases due to the need to coordinate and manage multiple antennas
Solution Approach 1:
The patent segments the UE antenna system into multiple antenna panels, each capable of independent positioning measurements. This segmentation allows the system to use multiple antennas for improved accuracy while managing complexity through modular organization of antenna panels with distinct identification and measurement capabilities.
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports antenna panel information and timing error characteristics to the network node. This feedback enables the network to compensate for inter-antenna timing differences and coordinate measurements effectively, resolving the complexity issue through information exchange and adaptive processing.
2Measurement precision
If timing errors from internal path delays are compensated, then positioning accuracy is improved, but measurement processing complexity increases
Solution Approach 1:
The patent applies preliminary action by having the UE perform calibration measurements and characterize timing errors between antenna panels before actual positioning measurements. This pre-characterization of timing error patterns allows for systematic compensation during positioning, reducing real-time processing complexity while maintaining high accuracy.
Solution Approach 2:
The patent changes parameters by introducing timing error correction values and adjustment factors that are applied to compensate for inter-antenna path delays. These parameter adjustments allow the system to maintain measurement accuracy without requiring complex real-time signal processing, as the compensation is achieved through parameter modification rather than complex computation.
3Reliability
If antenna panel information is reported and coordinated, then systematic errors are reduced, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential antenna panel identification information and timing error characteristics from the full antenna system state. By taking out only the necessary parameters (antenna panel IDs, timing error corrections, and measurement associations) rather than all possible antenna state information, the system achieves reliable error compensation with minimal signaling overhead.
Data Source
AI summary
Methods and apparatuses provide a mechanism to account for timing errors of a wireless device (12) in positioning measurements. In one example, a wireless device (12) performs reference-signal transmissions or measurements and sends information to a network node (20) that is involved in positioning of the wireless device (12). The information indicates associations of the reference-signal transmissions or measurements with respective timing groups of the wireless device (12). Each timing group represents a related set of transmission or reception timing errors within the wireless device (12). Based on the information, the network node (20) accounts for the different timing-group associations when performing positioning calculations that are based on the reference-signal transmissions or measurements performed by the wireless device (12).