Terminal Device Positioning Switching for Accuracy and Power
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Solution Overview
Problem
Current wireless telecommunications systems face challenges in efficiently supporting advanced location-based services with precise positioning while managing power consumption, especially in scenarios requiring hybrid positioning techniques and multi-stage positioning methods to balance accuracy and battery life.
Innovation Solution
The implementation of a wireless telecommunications system that utilizes a location server to provide positioning assistance information, allowing terminal devices to switch between different positioning techniques based on proximity to a target location, such as GNSS, WLAN, and Bluetooth beacons, using a multi-level/multi-stage approach to optimize accuracy and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-precision positioning techniques (e.g., GNSS, WLAN, Bluetooth beacons) are continuously activated, then positioning accuracy is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic switching between different positioning techniques based on real-time conditions. The system transitions from low-power techniques (cell ID-based positioning) to high-precision techniques (GNSS, WLAN, Bluetooth) when specific trigger conditions are met, such as proximity to target locations or when higher accuracy is required. This dynamic adaptation resolves the contradiction by activating precise positioning only when necessary rather than continuously.
Solution Approach 2:
The system changes operational parameters by switching between different positioning modes with varying precision and power consumption characteristics. It uses cell ID-based positioning for general location, and transitions to GNSS/WLAN/Bluetooth techniques when parameters such as required accuracy or proximity to POI change. This parameter-based switching allows the system to optimize the balance between positioning accuracy and power consumption.
2Measurement precision
If multiple positioning techniques are used simultaneously, then positioning accuracy and reliability are improved, but device complexity increases
Solution Approach 1:
The patent segments the positioning process into multiple stages with different techniques. First, cell ID-based positioning provides initial location information. Then, based on trigger conditions, the system selectively activates additional positioning techniques (GNSS, WLAN, Bluetooth) only when needed. This segmentation approach reduces overall system complexity by not requiring all techniques to operate simultaneously, while still achieving high accuracy when required.
Solution Approach 2:
The system implements a universal positioning framework that can handle multiple positioning techniques through a unified architecture. The location server and terminal device are designed to support various positioning methods (cell ID, GNSS, WLAN, Bluetooth) within a single system, allowing flexible combination of techniques based on conditions without requiring separate dedicated systems for each method.
3Measurement precision
If continuous positioning monitoring is performed, then location accuracy is maintained, but battery life is reduced
Solution Approach 1:
The system employs periodic positioning monitoring rather than continuous monitoring. It uses trigger conditions based on events such as approaching target locations, changing geographic zones, or time-based intervals to activate positioning techniques. This periodic approach maintains location accuracy when needed while significantly reducing power consumption during transit or when precise location is less critical, thereby extending battery life.
4Loss of energy
If on-demand positioning assistance information is provided, then network efficiency is improved, but positioning response time may increase
Solution Approach 1:
The system performs preliminary actions by pre-configuring trigger conditions and positioning parameters before they are needed. The location server prepares positioning assistance information and trigger condition criteria in advance based on stored POI data and user profiles. When trigger conditions are met, the system can quickly activate appropriate positioning techniques without delay, thus maintaining fast response time while using on-demand information provision to save network energy.
Data Source
AI summary
A method of operating a terminal device supporting a plurality of positioning techniques which use positioning measurements made by the terminal device and positioning assistance information received from a location server to determine the location of the terminal device. The method includes: establishing a target location; selecting a first positioning technique for navigating towards the target location; receiving first positioning assistance information from the location server for the first positioning technique; determining a first location of the terminal device in accordance with the first positioning technique and the first positioning assistance information; establishing a first trigger for using a second positioning technique which is associated with higher positioning accuracy than the first positioning technique; and, in response to determining the first trigger is satisfied, determining a second location of the terminal device in accordance with the second positioning technique and second positioning assistance information received from the location server.