The present document specifies the binding of Mca and Mcc primitives (message flows) onto the MQTT protocol. It specifies: 1) How a CSE or AE connects to MQTT. 2) How an Originator (CSE or AE) formulates a Request as an MQTT message@ and transmits it to its intended Receiver. 3) How a Receiver listens for incoming Requests. 4) How that Receiver can formulate and transmit a Response.