Satellite Signal Reception Control for Positioning
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Solution Overview
Problem
Existing electronic devices that receive satellite signals for positioning face challenges in reducing Time to First Fix (TTFF) and power consumption, particularly when used indoors where satellite signals are weak, leading to repeated failed receptions and unnecessary power usage.
Innovation Solution
Incorporating a detecting section that senses state changes, such as user operations or environmental conditions, to control the satellite signal reception, allowing the device to enter a driving state only when a state change indicates a higher likelihood of successful signal reception, thereby reducing unnecessary power consumption and improving TTFF.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device performs satellite signal reception at predetermined intervals to maintain positioning information, then the positioning information remains updated, but power consumption increases due to unnecessary receptions when the device is left indoors
Solution Approach 1:
The device performs satellite signal reception in advance when state changes indicate the device is likely to be taken outdoors (power-on, screen switching, communication end, charging start). This preliminary action ensures positioning information is updated before actual outdoor use, avoiding the need for continuous periodic receptions and reducing power consumption while maintaining information availability.
Solution Approach 2:
The control section monitors device state changes and uses this feedback to dynamically adjust reception timing. When states suggesting outdoor transition are detected, the system triggers reception; otherwise, it suppresses unnecessary receptions. This feedback mechanism optimizes the balance between maintaining positioning information and conserving battery power.
2Reliability
If the device continuously receives satellite signals to ensure latest positioning information is obtained, then positioning accuracy is maintained, but Time to First Fix increases due to repeated reception attempts
Solution Approach 1:
Positioning information is obtained in advance during state change moments when the device is likely to be taken outdoors. This preliminary action ensures that when the user actually needs positioning (takes the device outdoors), the information is already updated, significantly reducing Time to First Fix while maintaining positioning accuracy.
Solution Approach 2:
The system skips unnecessary reception attempts by detecting device states that indicate the device is likely to remain indoors. By skipping these futile reception attempts, the system reduces Time to First Fix when actual outdoor positioning is needed, while still maintaining positioning accuracy through strategic receptions at state change moments.
Data Source
AI summary
An electronic device includes: a satellite signal receiving section that receives a satellite signal with which positioning information is overlapped from a positioning satellite; a reception control section that controls driving of the satellite signal receiving section; and a detecting section that detects a state change of the electronic device, in which the reception control section allows the satellite signal receiving section to enter a driving state when the detecting section detects the state change to receive the satellite signal. According to this electronic device, it is possible to reduce a TTFF at the positioning start, and to reduce power consumption in the satellite signal reception.