IOT OAM CONNECTIVITY MODEL - END-TO-END APPLICATION LAYER RELAY PING FOR CONNECTIVITY CHECK

Methods are provided that allow for detecting the connectivity between an Internetof-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. DETAILED DESCRIPTION In an Internet-of-Things (IoT) environment, a MQTT local broker (bridge mode) runs on IoT gateway (IoT-GW) that receives data from multiple devices/sensors using MQTT or similar protocols. (MQTT is a lightweight messaging protocol for small sensors and mobile devices, optimized for high-latency or unreliable networks.) An IoT application (App) running in the cloud will consolidate the telemetry data from different such IoT GWs. The MQTT Pub/Sub topic based messages are used for the data communication between IoT-App and IoT-GW, as shown in Figure 1 below.