GNSS Positioning Signal Quality Control for Power Reduction
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Solution Overview
Problem
The high power consumption of GNSS satellite positioning in terminal equipment, such as mobile phones, reduces their endurance due to the need to frequently search for positioning signals across multiple satellite constellations, leading to significant battery drain, with the positioning function being a major power consumer.
Innovation Solution
A positioning method that determines the quality parameters of received satellite signals, such as satellite elevation and carrier noise density, and controls the terminal equipment to stop receiving signals from constellations that meet specific preset conditions, reducing unnecessary power usage by identifying and blacklisting weaker or less reliable signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal equipment receives positioning signals from multiple satellite constellations, then the positioning accuracy is improved, but the power consumption increases
Solution Approach 1:
The patent changes the parameter of signal reception by dynamically adjusting which constellations are received based on quality parameters. The terminal equipment evaluates quality parameters (such as signal strength, elevation angle, carrier-to-noise ratio) of each constellation and selectively stops receiving signals from constellations that meet preset conditions (e.g., quality parameter below threshold), thereby reducing power consumption while maintaining positioning accuracy through reception of high-quality signals only.
2Reliability
If the terminal equipment continuously searches for positioning signals from all constellations, then the positioning reliability is improved, but the battery life is reduced
Solution Approach 1:
The patent applies partial action by selectively receiving positioning signals only from constellations that meet quality criteria rather than continuously searching all constellations. The terminal equipment determines quality parameters for each constellation and stops receiving signals from those meeting preset conditions (e.g., insufficient signal quality), thereby reducing the duration and intensity of signal searching operations while maintaining sufficient positioning reliability through quality-controlled signal reception.
3Adaptability or versatility
If the terminal equipment receives signals from weaker constellations, then the coverage is improved, but the power consumption increases
Solution Approach 1:
The patent applies local quality by evaluating and treating different constellations differently based on their specific signal qualities. Instead of uniformly receiving all constellations, the terminal equipment determines quality parameters for each constellation individually and selectively stops receiving signals from constellations whose quality parameters meet preset conditions (e.g., weak signal strength, low elevation angles). This ensures that coverage is maintained through reception of quality signals while avoiding unnecessary power consumption from weaker constellations.
Data Source
AI summary
A positioning method may include: receiving a positioning signal of at least one constellation; determining a quality parameter of each constellation of the at least one constellation correspondingly based on the positioning signal of the at least one constellation; controlling a terminal equipment to stop receiving the positioning signal of the constellation of the at least one constellation, where the quality parameter of the constellation meets a preset condition.