Bluetooth Mesh Coded PHY Range Extension
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Solution Overview
Problem
Bluetooth mesh networks face challenges in maintaining communication quality over long physical distances, requiring relay nodes that increase network establishment costs and packet error rates exceed acceptable thresholds when using non-coded PHY connections.
Innovation Solution
A Bluetooth mesh network system and method that employs a provisional node to establish coded PHY connections between nodes, using techniques like 2-bit or 8-bit coding schemes and cyclic redundancy checks to maintain packet error rates below thresholds, even when physical distances exceed maximum non-coded PHY communication distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If relay nodes are disposed to extend communication range, then communication distance is improved, but network establishment cost increases
Solution Approach 1:
The patent changes the PHY connection parameter from non-coded to coded connection, enabling communication at distances exceeding the maximum non-coded PHY communication distance while maintaining packet error rates below the threshold, thus extending communication range without adding relay nodes
Solution Approach 2:
The patent segments the network establishment process by introducing a provisional node that separately performs coded PHY connection establishment between endpoint nodes, avoiding the need to deploy additional relay nodes while achieving extended communication range
2Device complexity
If non-coded PHY connection is used, then device complexity is reduced, but packet error rate exceeds threshold when physical distance is large
Solution Approach 1:
The patent changes the PHY connection parameter from non-coded to coded connection, which introduces error correction capabilities that keep packet error rates below the threshold even when physical distances exceed the maximum non-coded PHY communication distance
Data Source
AI summary
The present invention discloses a Bluetooth mesh network system having a communication range extending mechanism that includes a plurality of nodes and a provisional node. The provisional node is configured to transmit a connection setting packet to the nodes to control the nodes to establish a coded PHY connection between each two of the nodes such that a packet error rate is smaller than a threshold value when the nodes perform communication when a physical distance between each two of the nodes is larger than a maximum non-coded-PHY communication distance, in which when the nodes establish a non-coded-PHY connection and the physical distance is larger than the maximum non-coded-PHY communication distance, the packet error rate is larger than the threshold value.