Bluetooth Low Energy Advertising Channel Optimization

Solution Overview

Problem

In Bluetooth Low Energy radio communication systems, the constant use of three channels for advertising by slave devices leads to wasteful power consumption, especially when communication is only needed with a specific master device.

Innovation Solution

A radio communication apparatus that dynamically determines the number of frequency bands to use for advertising based on predetermined conditions, such as the type of application or communication environment, to reduce power consumption by either using one channel or three channels depending on the specific requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the slave device constantly uses three channels for advertising, then the reliability of connection establishment is improved, but the power consumption increases

Engineering Contradiction:

Improveconnection establishment reliabilityVSAvoidslave device power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The slave device dynamically adjusts the number of advertising channels based on connection establishment status. When connected, it switches to using fewer channels (reducing power consumption); when not connected, it uses more channels (maintaining reliability). This dynamic adaptation resolves the contradiction between reliability and power consumption.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes the parameter of advertising channel count from a fixed value (3 channels) to a variable value (1 or 3 channels) based on connection status. This parameter change allows the system to optimize between reliability and power consumption by selecting appropriate channel counts for different operational states.

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If the slave device uses M (M<N) frequency bands for advertising, then the power consumption is reduced, but the adaptability to different communication scenarios deteriorates

Engineering Contradiction:

Improveslave device power consumptionVSAvoidcommunication scenario adaptability

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The slave device dynamically adjusts the number of advertising channels based on connection establishment status. When connected, it switches to using fewer channels (reducing power consumption); when not connected, it uses more channels (maintaining reliability). This dynamic adaptation resolves the contradiction between reliability and power consumption.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes the parameter of advertising channel count from a fixed value (3 channels) to a variable value (1 or 3 channels) based on connection status. This parameter change allows the system to optimize between reliability and power consumption by selecting appropriate channel counts for different operational states.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9681258B2Radio communication apparatus, radio communication method, computer-readable medium, slave device, and master device

Publication Date: 2017.06.13 CASIO COMPUTER CO LTD

AI summary

When executing a predetermined application in which radio communication with a slave device is necessary, a master device scans an advertisement from the slave device by using previously-set one channel among three channels for advertising. When transmitting the advertisement to the master device executing the predetermined application, the slave device transmits the advertisement by using previously-set one channel among three channels for advertising.