BLE Mesh Node Connection Establishment via Periodic Advertisement
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Solution Overview
Problem
Current Bluetooth Low Energy (BLE) mesh networks face issues with signal retransmission, acknowledgement (ACK) delay, collision occurrence probability, power consumption, and data rate limitations, which affect communication reliability and efficiency in IoT applications.
Innovation Solution
Implementing a connection-based scheme in BLE mesh networks that includes signal retransmission mechanisms, optimized advertisement and scan processes, and data channel utilization to establish connections between nodes, thereby reducing ACK delay, collision probability, and power consumption while increasing data rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional flooding scheme is used in BLE mesh network, then network coverage and connectivity are improved, but collision occurrence probability increases and communication reliability deteriorates
Solution Approach 1:
The patent introduces an intermediary connection establishment mechanism between nodes. Before data transmission, nodes perform advertisement and scan processes to establish dedicated connections, acting as intermediaries that mediate between the flooding scheme's broad coverage and the need for reliable communication. This connection-based approach reduces collisions by providing dedicated transmission paths while maintaining network coverage.
2Reliability
If connection-based scheme is implemented, then communication reliability and data rates are improved, but device complexity and connection establishment overhead increase
Solution Approach 1:
The patent implements periodic advertisement and scan processes with defined intervals (e.g., advertisement interval, scan interval). This periodic action structure simplifies connection management by creating predictable, time-synchronized opportunities for connection establishment, reducing the complexity of continuous connection maintenance while ensuring reliable communication channels are periodically available.
3Speed
If advertisement and scan processes are performed continuously, then connection establishment speed is improved, but power consumption increases
Solution Approach 1:
The patent employs periodic advertisement and scan processes with configurable intervals rather than continuous operation. Nodes perform advertisement at defined intervals and scan during specific time windows, creating periodic opportunities for connection establishment. This approach maintains relatively fast connection setup while significantly reducing power consumption compared to continuous processes, as nodes can enter low-power states between periodic operations.
Data Source
AI summary
The present invention relates to a technology for sensor networks, machine to machine (M2M) communication, machine type communication (MTC) and the Internet of Things (IoT). The present disclosure can be utilized for smart services (smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail business, security and safety-related services, etc.) based on the aforementioned technology. The present invention relates to a method for transmitting and receiving, by a node, signals in a mesh network, comprising: a step of receiving, from another node, a connection request (Connect_REQ) message requesting the establishment of a connection while performing an advertisement process on the basis of an advertisement process cycle; a step of establishing a connection to the another node; and a step of transmitting, to the another node, a message comprising node information including at least one of the following: connection information between the nodes, the advertisement process cycle, or a scan process cycle which performs a scan process.