BLE Mesh Communication Device Using Dual Mode Control

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Solution Overview

Problem

In wireless mesh networks using BLE technology, data propagation speed decreases significantly as the network scale increases due to the reliance on sequential one-to-one communication, leading to longer data propagation times and increased communication overhead.

Innovation Solution

Implementing a wireless communication device with both advertising and connection communication control units, allowing for broadcast communication with unspecified devices and one-to-one communication with specific devices, respectively, and optimizing channel utilization to reduce communication overhead and enhance propagation speed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If sequential one-to-one communication is used for data propagation in mesh networks, then connection reliability is improved, but data propagation speed deteriorates as network scale increases

Engineering Contradiction:

Improveconnection reliabilityVSAvoiddata propagation speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The patent combines two communication modes (advertising communication for broadcast and connection communication for one-to-one) into a unified system. Devices can switch between these modes depending on whether the target device is within connection range, thereby achieving both high speed through advertising and high reliability through connection establishment when needed.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements dynamic communication mode selection where devices adaptively switch between advertising communication and connection communication based on real-time network conditions and device proximity. This dynamic adjustment allows the system to optimize between speed and reliability depending on the operational context.

Inventive Principle:

Principle #15Dynamics

2Device complexity

If sequential one-to-one communication is used for data propagation, then communication overhead is reduced per connection, but total communication time increases with network scale

Engineering Contradiction:

Improvecommunication overhead per connectionVSAvoidtotal data propagation time

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

The patent segments the communication process into two distinct phases: initial data discovery using advertising communication (broadcast mode) and subsequent detailed communication using connection communication (one-to-one mode). This segmentation allows efficient parallel discovery of multiple devices while maintaining reliable individual communication channels when needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary device discovery and advertising communication before establishing formal connection communication. This preliminary action allows devices to identify potential communication targets and propagate data quickly through advertising, reserving connection establishment for when actual detailed communication is required.

Inventive Principle:

Principle #10Preliminary action

3Speed

If advertising communication is used for broadcast, then data propagation speed is improved, but channel utilization efficiency deteriorates

Engineering Contradiction:

Improvedata propagation speedVSAvoidchannel utilization efficiency

Core Design Contradiction:

SpeedVSProductivity

Solution Approach 1:

The patent implements periodic advertising communication at optimized intervals rather than continuous transmission. Devices perform advertising at specific periods when needed for data propagation, allowing other devices to utilize the same channels for connection communication during non-advertising periods, thereby improving overall channel utilization efficiency.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent dynamically adjusts the use of advertising communication based on actual data propagation needs rather than continuous operation. Advertising is activated only when data needs to be propagated to devices outside connection range, allowing channels to be efficiently utilized for connection communication during normal operations.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11272348B2Radio communication apparatus and communication system

Publication Date: 2022.03.08 RENESAS ELECTRONICS CORP

AI summary

In the conventional wireless communication device, the message propagation path becomes complicated and the message arrival takes a long time. According to one embodiment, the wireless communication device includes an advertising communication control unit that performs broadcast communication with a plurality of unspecified other device, and a connection communication control unit that performs one-to-one communication with a preset specific other device, and performs transmission and reception of a message using a connection communication control unit with another device in a connection cluster that can communicate with the connection communication control unit, and performs transmission and reception of a message using an advertising communication control unit by a wireless communication device permitted in the connection cluster with another device outside the connection cluster.