Gateway Supplementary Broadcast for IoT Reconnection
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Solution Overview
Problem
Mobile terminals in IoT systems frequently disconnect from networks due to gateway switching, leading to increased power consumption as they enter a listening mode, necessitating a method to quickly rejoin networks and reduce disconnection time.
Innovation Solution
A method involving a gateway device that determines network disconnection by monitoring heartbeat frames, feeds back disconnection information to a server, and sends supplementary broadcast frames according to server instructions, allowing the mobile terminal to reconnect without waiting for a full heartbeat cycle, thereby reducing power consumption and improving response times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile terminal enters listening mode after network disconnection, then it can detect gateway broadcast frames to rejoin the network, but the power consumption increases to milliampere level
Solution Approach 1:
The gateway device sends supplementary broadcast frames proactively before the mobile terminal needs to perform full network rejoining. This preliminary action allows the terminal to receive updated broadcast information while in low-power mode, eliminating the need to enter high-power listening mode for detection.
Solution Approach 2:
The supplementary broadcast frame acts as an intermediary mechanism that bridges the gateway and mobile terminal during network disconnection periods. It carries essential broadcast information to the terminal without requiring the terminal to activate its high-power reception circuitry.
2Stability of the object's composition
If the mobile terminal waits for a full heartbeat cycle to rejoin the network, then the protocol timing is maintained, but the network disconnection time and power consumption increase
Solution Approach 1:
The gateway sends supplementary broadcast frames containing protocol timing information before the terminal completes its disconnection sequence. This allows the terminal to resync with protocol timing earlier, reducing the effective disconnection time while maintaining protocol stability.
Solution Approach 2:
The system implements feedback through supplementary broadcast frames that provide timing and synchronization information to mobile terminals. This feedback mechanism allows terminals to adjust their rejoining timing based on gateway state, reducing unnecessary waiting time while maintaining protocol integrity.
3Productivity
If the gateway sends supplementary broadcast frames frequently, then mobile terminals can rejoin the network quickly, but the gateway's communication overhead and energy consumption increase
Solution Approach 1:
The gateway dynamically adjusts the sending frequency and timing of supplementary broadcast frames based on terminal disconnection events and network conditions. This dynamic approach ensures timely delivery of broadcast information to reconnecting terminals while minimizing unnecessary transmissions that would waste gateway energy.
Solution Approach 2:
The system changes the parameter of broadcast frame timing from fixed periodic intervals to event-driven timing based on terminal disconnection detection. This parameter change allows the gateway to send supplementary frames only when necessary, improving reconnection speed while reducing overall communication overhead and energy consumption.
Data Source
AI summary
A method for rejoining a network after network disconnection of a mobile terminal and related devices are provided. The method includes: a gateway determining whether to disconnect from a target mobile terminal; if yes, feeding back network disconnection information of the target mobile terminal to a server; receiving a supplementary broadcast frame instruction sent by the server; and the gateway sending a supplementary broadcast frame according to the supplementary broadcast frame instruction.