AiVibeStore-and-Forward Buffering
Store-and-forward is a technique in which an edge device or gateway stores data locally when its upstream connection is unavailable and forwards the buffered data, in order and with original timestamps, once the connection is restored.
A store-and-forward function writes outgoing records to a local buffer, in memory or on persistent storage, whenever delivery to the destination fails or is not confirmed. When communication returns, it transmits the backlog, usually oldest first, while continuing to handle new data. Each record keeps its original timestamp and quality, so historians and analytics can place it correctly in time. Buffer size, retention policy and behaviour when the buffer fills, such as discarding the oldest data, are configurable.
Store-and-forward protects data completeness in IIoT systems that depend on wireless, cellular or wide-area links, at remote sites served by RTUs and in plants whose cloud connections may fail. It is widely implemented in historian interfaces, SCADA clients, edge gateways and MQTT client libraries, and it is often required where continuous records support quality, compliance or energy reporting.
Designers should size buffers for the longest expected outage at the expected data rate, use storage that tolerates frequent writes and power loss, and test how the destination handles a sudden backlog of late-arriving data. Clock synchronisation at the edge is essential, since buffered data is only as accurate as its timestamps. Store-and-forward complements, but does not replace, protocol-level delivery guarantees such as MQTT QoS.
Key points
- Buffers data locally during upstream outages
- Forwards the backlog in order with original timestamps and quality
- Buffer size and overflow behaviour are configurable
- Common in historians, edge gateways, RTUs and MQTT clients
- Accurate edge clocks are essential for buffered data
Where AiVibe comes in
AiAmbA IoT is AiVibe's edge protocol layer: it discovers devices and normalises industrial signals, with supported protocols including Siemens S7, Mitsubishi MC, Delta Modbus, OPC UA and MQTT, and driver availability confirmed per installation. Writes to machines are deny-by-default.