Meaning
Routing protocol mechanisms automatically re-establish path connectivity when active links fail in a mesh network. A wireless system executes dynamic topology repair to discover alternative routes without manual intervention. The sequence activates when a node fails to receive scheduled heartbeat packets from its parent.
Reliable operation in factories requires this capability to handle moving obstacles.
Restoration Process
Link failure detection initiates a localized route discovery where the disconnected node broadcasts a solicitation packet to its neighbors. The node listens for a specified response window to collect incoming route advertisement frames from viable parent nodes. It then ranks these candidates according to their link quality indicator and path cost.
Finally, it transmits a join request to the highest-rated neighbor to finalize the connection. This quick sequence establishes a new path.
Network Constraint
Energy budgets limit how frequently a transceiver can execute discovery cycles. Nodes running on coin cells must restrict these attempts to prevent early battery depletion. An exponential back-off timer manages the retry intervals during prolonged outages.
Validation Metric
Recovery latency acts as the baseline for assessing network resilience during environmental shifts. Engineers measure the duration of the packet loss window during an induced link failure. A stable implementation completes this recovery within a few hundred milliseconds to preserve sensor telemetry.
