Wireless Device Positioning via Mobility-Triggered Sensor Reporting
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Solution Overview
Problem
Current positioning techniques in wireless networks face challenges in achieving high accuracy while managing power consumption and network load, especially when using sophisticated sensors like IMUs, which can lead to excessive reporting of unnecessary data and increased uncertainty in location estimation, particularly in rural areas.
Innovation Solution
Implementing a network node and wireless device method where the network node configures the wireless device to provide positioning-related reports only when a mobility criterion is fulfilled, utilizing sensor measurements such as IMU data to reduce unnecessary reporting and optimize power consumption and network load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor measurements are continuously monitored and reported for positioning, then positioning accuracy is improved, but power consumption and network load increase
Solution Approach 1:
The system dynamically adjusts the positioning reporting behavior based on the wireless device's mobility state. When the device is stationary, reporting is reduced or stopped to save power. When mobility is detected above a threshold, reporting is activated or increased to maintain positioning accuracy. This dynamic adaptation resolves the contradiction by making the system responsive to actual positioning needs rather than continuously operating at maximum accuracy.
Solution Approach 2:
The system changes the reporting parameter (reporting frequency or activation state) based on the mobility criterion. The network node configures different reporting behaviors depending on whether the device meets the mobility threshold, effectively changing the operational parameters to balance accuracy and power consumption based on current conditions.
2Measurement precision
If sensor measurements are continuously monitored and reported for positioning, then positioning accuracy is improved, but network load increases
Solution Approach 1:
The system dynamically adjusts the positioning reporting behavior based on the wireless device's mobility state. When the device is stationary, reporting is reduced or stopped to decrease network load. When mobility is detected above a threshold, reporting is activated or increased to maintain positioning accuracy. This dynamic adaptation resolves the contradiction by making the system responsive to actual positioning needs rather than continuously operating at maximum accuracy.
Solution Approach 2:
The system changes the reporting parameter (reporting frequency or activation state) based on the mobility criterion. The network node configures different reporting behaviors depending on whether the device meets the mobility threshold, effectively changing the operational parameters to balance accuracy and network load based on current conditions.
3Measurement precision
If positioning reports are provided frequently, then positioning accuracy is improved, but power consumption increases
Solution Approach 1:
Instead of continuous reporting, the system implements periodic or event-triggered reporting based on mobility detection. The wireless device monitors its own mobility state and only generates positioning reports when mobility criteria are met, creating a periodic rather than continuous reporting pattern that reduces energy loss while maintaining necessary positioning accuracy.
Solution Approach 2:
The wireless device autonomously monitors its own mobility state and decides when to generate positioning reports based on pre-configured mobility criteria. This self-service approach eliminates the need for continuous network-controlled reporting triggers, reducing the energy required for communication overhead while maintaining positioning accuracy when needed.
Data Source
AI summary
Methods, network node (200) and wireless device (202) for supporting positioning of the wireless device in a wireless network. The network node requests (2:4) the wireless device to provide a positioning related report when a mobility criterion is fulfilled, which criterion may be selected (2:3) based on sensor capabilities of the device. The wireless device monitors (2:5) sensor measurements and evaluates the mobility criterion. When the mobility criterion is fulfilled the wireless device provides (2:6) the positioning related report to the network node which then obtains (2:7) the position or mobility status of the wireless device based on the positioning related report which may contain information related to said mobility status and/or sensor measurements made in the device.