Methods are provided that allow for detecting the connectivity between an Internet-of-Things application (IoT-App) and a device at the application layer. In one method, an IoT gateway (IoT-GW) acts as a proxy that triggers a Request message to the device upon receiving a proxy request from the IoT-App with relevant details such as correlation identifier (ID) that can be used to correlate the response to the request. In another method, local statistics cached by the IoT-GW are leveraged for each device.
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Nainar, Nagendra Kumar; Pignataro, Carlos M.; and Sheriff, Akram, "IOT OAM CONNECTIVITY MODEL - END-TO-END APPLICATION LAYER RELAY PING FOR CONNECTIVITY CHECK", Technical Disclosure Commons, (July 29, 2020)