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How does the gateway distinguish a Client Restart from a Reconnection?

April 26, 2017client distinguish Gateway Reconnection

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How does the gateway distinguish a Client Restart from a Reconnection?

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• Disconnection handshake : When a client shuts down, it performs a handshake before disconnecting from the gateway • Bearer-level signalling : For connection-oriented bearers like TCP, the disconnection can be spotted at the socket level • Gateway-side session storage : The Gateway stores existing sessions on the local storage. When a new sessionId is encountered, the Gateway first checks in this storage, to check if the same client (sessionId) had connected before.