GNSS Receiver Dynamic State Switching for Power Optimization

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Solution Overview

Problem

Conventional GNSS receivers waste power by performing satellite information collections/updates at a fixed frequency, which is inefficient given varying user behaviors and environment conditions, leading to unnecessary power consumption.

Innovation Solution

A GNSS receiver with a controlling unit that determines whether to switch between different operation states based on user behaviors and environment conditions, using a state switching criterion and positioning information to adjust the frequency of satellite information collections, thereby optimizing power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If satellite information collections/updates are performed constantly, then positioning accuracy is improved, but power consumption increases significantly

Engineering Contradiction:

Improvepositioning accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic switching between different operation states (first operation state with higher frequency satellite information collection for better accuracy, and second operation state with lower frequency for power saving). The controlling unit determines which state to enter based on current positioning requirements and power conditions, making the system adaptable rather than static.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the frequency parameter of satellite information collection based on operation state. In the first operation state, satellite information is collected at a first frequency, while in the second operation state, it is collected at a second frequency (lower than the first). This parameter adjustment resolves the contradiction between accuracy and power consumption.

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If satellite information collections/updates are performed periodically with a fixed frequency, then power consumption is reduced, but positioning accuracy deteriorates under varying user behaviors and environment conditions

Engineering Contradiction:

Improvepower consumptionVSAvoidpositioning accuracy

Core Design Contradiction:

Use of energy by moving objectVSMeasurement precision

Solution Approach 1:

The system transitions from a fixed-frequency periodic collection approach to a dynamic frequency adjustment mechanism. The controlling unit monitors positioning information and determines when to switch between operation states, allowing the collection frequency to adapt to changing conditions such as user behavior and environment, thus maintaining accuracy while managing power consumption.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent employs feedback through the controlling unit that continuously monitors positioning information and determines whether to switch operation states based on the first positioning information and switching criterion. This feedback loop enables the system to adjust satellite information collection frequency dynamically, resolving the contradiction by adapting to actual positioning needs rather than using a fixed schedule.

Inventive Principle:

Principle #23Feedback

3Device complexity

If satellite information collections/updates are performed with a fixed frequency interval, then system simplicity is maintained, but power saving efficiency decreases due to inability to adapt to different user behaviors

Engineering Contradiction:

Improvesystem simplicityVSAvoidunnecessary power consumption

Core Design Contradiction:

Device complexityVSLoss of energy

Solution Approach 1:

The patent introduces dynamic state switching capability that allows the GNSS receiver to adapt its operation mode based on positioning requirements. By implementing two operation states with different collection frequencies and a controlling unit to manage transitions, the system achieves a balance between maintaining relative simplicity and reducing unnecessary power consumption through adaptive behavior.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the frequency parameter of satellite information collection based on determined switching criteria. When positioning accuracy requirements are high, the system operates at first frequency; when power saving is prioritized and accuracy requirements are lower, it switches to second frequency. This parameter change approach reduces unnecessary energy loss while maintaining system manageability.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9019158B2GNSS receiver and method for determining whether to switch from one operation state to another operation state according to state switching criterion and positioning information

Publication Date: 2015.04.28 MEDIATEK INC

AI summary

A method for controlling a global navigation satellite system (GNSS) receiver operated in a first operation state includes: providing a state switching criterion; obtaining a positioning information; determining whether to switch from the first operation state to a second operation state according to the obtained positioning information and the state switching criterion, wherein the power consumption of the GNSS receiver operating under the first operation state and the second operation state is different.