Communication sessions at a coap protocol layer

A node comprising a processor, a memory, and communication circuitry, the node being connected to a communications network via its communication circuitry, the node further comprising computer-executable instructions stored in the memory of the node which, when executed by the processor of the node, cause the node to:

• receive, via the communication network from an other node on the network, a CoAP message indicating a request to establish a communication session between the node and the other node at a constrained application protocol (CoAP) layer of the network;
• generate an identifier to uniquely identify the communication session between the node and the other node;
• create an instance of the communication session in a memory of the node and store information about the communication session therein;
• and
• send to the other node via the communication network, a CoAP response message acknowledging establishment of the communication session and including the communication session identifier.