Mobile Device Network Synchronization Status Determination
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Solution Overview
Problem
Mobile device positioning accuracy is compromised when base stations are not synchronized, as unsynchronized signals from base stations are not reliable for precise positioning, and existing methods struggle to determine network synchronization status effectively.
Innovation Solution
A method and system for determining the synchronization status of a network by a mobile device or server, which involves obtaining synchronization status information from base stations, using system information, observed time difference of arrival (OTDOA) assistance data, and clock bias variability to determine if the network is synchronous, allowing for the use of previously collected crowdsourced time correction data for accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the mobile device uses previously collected crowdsourced time correction data for positioning, then positioning accuracy is improved, but the device must first determine network synchronization status which increases system complexity
Solution Approach 1:
The system performs preliminary determination of network synchronization status before positioning operations. By checking whether base stations are synchronized in advance, the system can decide whether to use pre-collected crowdsourced time correction data, avoiding unnecessary real-time data collection and processing complexity during actual positioning.
Solution Approach 2:
The mobile device autonomously determines the synchronization status of the network by analyzing signals from base stations and comparing timing information. This self-determination capability eliminates the need for external server intervention in the synchronization check, reducing overall system complexity while maintaining positioning accuracy.
2Reliability
If the system determines synchronization status using multiple methods (system information, OTDOA assistance data, clock bias variability), then reliability is improved, but the complexity of detection and measurement increases
Solution Approach 1:
The synchronization status determination is divided into multiple independent detection methods: analyzing system information from base stations, measuring OTDOA assistance data, and evaluating clock bias variability. Each method operates independently and can be applied selectively based on available data, making the overall detection process more manageable and reliable.
Solution Approach 2:
The system continuously monitors multiple parameters (system information, OTDOA data, clock bias) and uses feedback from these measurements to determine synchronization status. By comparing actual measurements against expected values and trends, the system can reliably detect synchronization states while adapting to changing network conditions.
Data Source
AI summary
Methods, systems, computer-readable media, and apparatuses for determining a position of a mobile device connected to a network are presented. In various embodiments, the mobile device obtains a synchronization status of the network associated with one or more base stations. If the synchronization status indicates that the network is synchronous, the mobile device determines the position of the mobile device using previously collected crowdsourced time correction data for the synchronous network.