Wireless Device Measurement Report Resolution Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LTE positioning systems face limitations in indoor positioning accuracy due to inadequate resolution of Reference Signal Time Difference (RSTD) measurements, which is insufficient for precise location determination in indoor scenarios.
Innovation Solution
The method involves adapting measurement report resolution by allowing wireless devices to select from pre-defined mappings based on suggested resolution parameters, enabling efficient RSTD quantization and reporting, and facilitating improved positioning accuracy by allowing network nodes to communicate desired report resolutions with devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RSTD measurement resolution is increased to improve indoor positioning accuracy, then positioning precision improves, but measurement reporting complexity and processing overhead increase
Solution Approach 1:
The patent implements dynamic measurement report resolution adaptation where the UE can select from multiple pre-defined resolution mappings (first through fourth mappings with resolutions of 1Ts, 0.5Ts, 0.25Ts, and 0.125Ts). The UE determines appropriate resolution based on measurement uncertainty and scenario requirements, allowing the system to adapt resolution dynamically rather than using a fixed value, thus balancing precision needs with system complexity.
Solution Approach 2:
The patent changes the resolution parameter of measurement reports by introducing multiple pre-defined resolution mappings. The UE can select different mappings (with resolutions ranging from 1Ts to 0.125Ts) based on the measurement uncertainty and positioning requirements, effectively changing the quantization parameter to achieve better indoor positioning accuracy when needed while maintaining coarser resolution for outdoor scenarios.
2Measurement precision
If measurement report resolution is increased for better positioning accuracy, then positioning performance improves, but signaling overhead between UE and network increases
Solution Approach 1:
The patent applies partial action by introducing multiple pre-defined resolution mappings (0.125Ts, 0.25Ts, 0.5Ts, 1Ts) rather than implementing a fully continuous resolution system. This allows the UE to select appropriate resolution levels based on actual positioning needs, achieving high accuracy when required while avoiding excessive signaling overhead in scenarios where high precision is not necessary.
Solution Approach 2:
The patent enables parameter changes in measurement report resolution by allowing the UE to select from multiple pre-defined mappings with different resolutions. The UE determines the appropriate mapping based on measurement uncertainty and positioning requirements, changing the resolution parameter dynamically to balance positioning accuracy with signaling overhead.
3Ease of manufacture
If fixed RSTD resolution of 1Ts is used to simplify system design, then implementation ease improves, but indoor positioning accuracy becomes inadequate
Solution Approach 1:
The patent segments the measurement report resolution into multiple discrete levels (first mapping: 1Ts, second mapping: 0.5Ts, third mapping: 0.25Ts, fourth mapping: 0.125Ts). This segmentation allows the system to maintain simple predefined options while providing progressively finer resolution levels, enabling adequate indoor positioning accuracy through selection of appropriate segmentation levels rather than requiring continuous variable resolution.
Solution Approach 2:
The patent creates a universal measurement reporting framework that supports multiple resolution mappings through a single standardized mechanism. The same LPP protocol and measurement reporting structure can handle both outdoor scenarios (using coarser 1Ts or 0.5Ts resolution) and indoor scenarios (using finer 0.25Ts or 0.125Ts resolution), making the system multi-functional across different positioning requirements without requiring separate specialized systems.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method performed by a wireless device for adapting measurement report resolution is disclosed. The method comprises performing a measurement, determining a measurement report resolution to be used, and sending a measurement report to the network node encoded based on the determined measurement report resolution. According to additional embodiments, prior to determining the measurement report resolution to be used, the wireless device informs the network node of the wireless device's capabilities of sending measurement reports encoded based on a plurality of different measurement report resolutions. According to additional embodiments, subsequent to informing the network node of the wireless device's capabilities, and prior to determining the measurement report resolution to be used, the wireless device receives a desired measurement report resolution from the network node.