Network self-healing method in a multi-drone system environment and the corresponding multi-drone system

Self-healing multi-drone network system using hello messages and TTL management

This technology is an algorithm for multi-drone ad-hoc networks that manages neighbor tables using the Time-to-Live (TTL) values of hello messages received from nearby drones. In the event of a communication loss, it autonomously restores network connectivity by moving sequentially to the previous location, the last known location of an expired neighbor, and finally the ground control center.

In Flying Ad Hoc Network (FANET) environments, when communication between drones and the controller is lost, simple "Return to Home" methods cause unnecessary movement, leading to high battery consumption and reduced mission efficiency.

This technology monitors the connection status of neighbor drones in real-time using TTL values. When a network disconnection threshold is reached, it restores the network by moving to specific locations—previous location, expired neighbor location, and ground control center—to re-establish hello message reception.

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Key Features:

• Multiple drones that extract IP addresses and location information from hello messages received from other drones
• A step of updating location information and TTL values if neighbor information corresponding to the extracted IP address exists, or creating and recording new neighbor information if it does not
• A step of deleting expired neighbor information from the neighbor table while checking the number of remaining active neighbor drones
• A step of executing the network self-healing mode if the number of active neighbor drones falls below a predefined threshold

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