Mobile Anchor Scheduling for Low-GDOP Target Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in accurately determining the position of mobile devices, particularly in environments with high geometric dilution of precision (GDOP), and in efficiently performing wireless sensing operations for target objects, due to limitations in scheduling and coordination of positioning operations.
Innovation Solution
A location server configures mobile devices to perform positioning operations at scheduled times and within specific time windows, considering GDOP considerations and threshold distances, to enhance positioning accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning operations are performed continuously to improve positioning accuracy, then measurement precision is improved, but use of energy and system resources increases
Solution Approach 1:
The patent implements periodic positioning operations where mobile devices transmit positioning signals only at scheduled time intervals rather than continuously. The location server determines specific time windows for positioning operations and configures mobile devices to perform measurements only during these windows, reducing energy consumption while maintaining positioning accuracy through strategic timing.
Solution Approach 2:
The location server performs preliminary determination of optimal positioning time windows based on predicted device locations and GDOP conditions before actual positioning operations. By pre-scheduling positioning operations during favorable geometric conditions, the system ensures measurement precision is maintained while avoiding unnecessary continuous transmissions that would increase energy consumption.
2Measurement precision
If positioning operations are scheduled based on GDOP considerations to improve measurement precision, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The location server acts as an intermediary that centralizes the complex GDOP calculation and scheduling logic. Instead of requiring each mobile device to independently calculate GDOP and determine optimal positioning times, the location server performs these calculations and provides scheduling instructions to devices, simplifying individual device complexity while maintaining overall system precision.
Solution Approach 2:
The system implements feedback mechanisms where mobile devices report their locations and signal measurements to the location server. The server uses this feedback to continuously update GDOP calculations and adjust positioning schedules, ensuring measurement precision is maintained while the feedback loop manages scheduling complexity through iterative optimization rather than complex upfront planning.
3Measurement precision
If multiple mobile devices are coordinated to perform positioning operations simultaneously to improve measurement precision, then positioning accuracy is improved, but loss of time increases
Solution Approach 1:
The patent segments positioning operations into distinct time windows assigned to different mobile devices rather than having all devices operate simultaneously. The location server divides the positioning task among multiple devices, each operating during specific scheduled intervals. This segmentation allows multiple devices to contribute to positioning accuracy while avoiding the time loss associated with coordinating simultaneous operations.
Solution Approach 2:
The positioning schedule is made dynamic, allowing the location server to adjust time window assignments for different mobile devices based on their current locations, GDOP conditions, and operational priorities. This dynamic scheduling optimizes the use of multiple devices to improve measurement precision while minimizing total coordination time by adaptively assigning devices to the most beneficial time slots.
Data Source
AI summary
In an aspect, a location server may receive a request to determine a position of a first mobile device at a first scheduled time. The location server may determine a first position of a second mobile device during a first time window before the first scheduled time. The location server may configure the second mobile device to perform positioning operations during a second time window corresponding to the first scheduled time to assist in the determination of the position of the first mobile device at the first scheduled time.