Bike Intercom Network Switching for Stable Multi-Rider Group Calls
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Solution Overview
Problem
Conventional intercom devices for bikes face challenges in maintaining stable communication among multiple riders due to Bluetooth disconnections, complex pairing procedures, and limitations in group call setups, especially when more than four riders are involved.
Innovation Solution
A wireless intercom device for bikes that utilizes a Bluetooth module for one-to-one and group calls, with automatic pairing to a device with the strongest signal, and integrates a mobile Wi-Fi router and repeater to form a stable Wi-Fi communication network, enabling seamless group calls through Wi-Fi or VoIP communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Bluetooth communication is used for intercom devices, then peer-to-peer communication is enabled, but connection stability deteriorates when distance between riders increases
Solution Approach 1:
The system segments the communication network into hierarchical levels: primary nodes (directly connected to master) and secondary nodes (connected to primary nodes). This segmentation allows the network to maintain connectivity even when individual connections fail, as riders can communicate through intermediate nodes rather than requiring direct peer-to-peer connections.
Solution Approach 2:
Primary nodes act as intermediaries between the master node and secondary nodes. When a secondary node needs to communicate with the master or other secondary nodes, it does so through the primary node, which relays the communication. This intermediary approach maintains connection stability over distance by reducing the direct communication burden on each device.
2Adaptability or versatility
If Bluetooth pairing is implemented for multiple riders, then group communication is enabled, but pairing complexity and time consumption increase significantly
Solution Approach 1:
The system performs preliminary actions by automatically selecting and connecting to available intercom devices without requiring manual pairing. The master node automatically discovers and connects to other riders' intercom devices within range, and primary nodes automatically connect to the master and secondary nodes, eliminating the need for time-consuming manual pairing procedures.
Solution Approach 2:
The intercom system performs self-service by automatically managing device discovery, selection, and connection. The master node automatically identifies and connects to other intercom devices in the group, and secondary nodes automatically connect to primary nodes, allowing the system to configure itself without user intervention and significantly reducing pairing time.
3Adaptability or versatility
If daisy chain connection is used for multiple riders, then group call is enabled, but connection disconnection occurs when any node fails
Solution Approach 1:
The system applies local quality by allowing different types of connections to coexist in the same network. Primary nodes maintain direct connections to the master node, while secondary nodes connect to primary nodes. This creates redundant communication paths where information can flow through multiple routes, ensuring that if one connection fails, alternative paths remain available to maintain group call functionality.
Data Source
AI summary
A wireless intercom device for a bike includes a Bluetooth module configured to perform Bluetooth communication with another wireless intercom device for a bike, and a one-to-one call module configured to perform a one-to-one call through the Bluetooth communication performed by the Bluetooth module. The Bluetooth module is configured to perform Bluetooth pairing with a plurality of wireless intercom devices for a bike in a daisy chain manner. The wireless intercom device for a bike further includes a group call module configured to perform a group call through Bluetooth communication when the Bluetooth pairing with the plurality of wireless intercom devices for a bike is performed in the daisy chain manner by the Bluetooth module.