RTK Assistance Interval Switching for Low-Power Positioning

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Solution Overview

Problem

Existing GNSS-based positioning technologies in consumer electronic devices, such as smartphones, face significant power consumption issues due to the need for continuous data downloading from servers to achieve high-precision positioning, especially when using RTK technology, which is not optimized for power efficiency.

Innovation Solution

A low-power-consumption positioning method that dynamically adjusts the interval for requesting positioning assistance data based on the device's location, precision requirements, and environmental conditions, allowing the device to enter different modes (e.g., extreme, normal, or suspending) to reduce power consumption while maintaining high-precision positioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If RTK technology is used to achieve high-precision positioning, then positioning precision is improved, but power consumption increases significantly

Engineering Contradiction:

Improvepositioning precisionVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent applies dynamics by making the data request interval adjustable rather than fixed. The system dynamically switches between a first time interval (for high-precision positioning) and a second time interval (for power saving) based on whether high-precision positioning is actually needed, allowing the positioning system to adapt its behavior to different operational scenarios

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of data request interval from a constant value to a variable that can take different values (first time interval or second time interval) depending on the positioning precision requirements. This parameter change allows the system to optimize between precision and power consumption based on actual needs

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If data is downloaded in real-time to maintain high-precision positioning, then positioning accuracy is improved, but baseband chip must remain in working state continuously increasing power consumption

Engineering Contradiction:

Improvepositioning accuracyVSAvoidbaseband chip working duration

Core Design Contradiction:

Measurement precisionVSDuration of action of stationary object

Solution Approach 1:

The patent implements periodic action by requesting assistance data at different intervals based on mode. In power-saving mode, the system requests data less frequently (second time interval), allowing the baseband chip to enter low-power states longer, while still maintaining the capability to switch to frequent requests (first time interval) when high precision is needed

Inventive Principle:

Principle #19Periodic action

3Use of energy by moving object

If the request interval for assistance data is prolonged to reduce power consumption, then power consumption is reduced, but positioning precision may deteriorate

Engineering Contradiction:

Improvepower consumptionVSAvoidpositioning precision

Core Design Contradiction:

Use of energy by moving objectVSMeasurement precision

Solution Approach 1:

The system dynamically adjusts the data request interval based on the current positioning mode. When high-precision positioning is required, it uses the first time interval to maintain accuracy. When power saving is the priority, it switches to the second time interval, accepting reduced precision updates. This dynamic adjustment resolves the contradiction by making the interval adaptive rather than fixed

Inventive Principle:

Principle #15Dynamics

4Adaptability or versatility

If the electronic device switches between different positioning modes, then adaptability to different scenarios is improved, but device complexity increases

Engineering Contradiction:

Improvepositioning mode adaptabilityVSAvoidcontrol logic complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the positioning operation into distinct modes (high-precision mode and power-saving mode), each with its own data request interval. This segmentation allows the system to handle different scenarios through mode switching rather than complex continuous adjustment, reducing control logic complexity while maintaining adaptability

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12560726B2Low-power-consumption positioning method and related apparatus

Publication Date: 2026.02.24 HUAWEI TECH CO LTD

AI summary

A low-power-consumption positioning method includes an electronic device sending first setting information to a server, where the first setting information is used to indicate the server to broadcast positioning assistance data to the electronic device at a first time interval (for example, 1 second). The electronic device resolves high-precision positioning information based on the positioning assistance data. When the electronic device meets a first preset condition, the electronic device may send second setting information to the server. The second setting information instructs the server to broadcast the positioning assistance data to the electronic device at a second time interval (for example, 60 seconds). The first time interval is shorter than the second time interval.