Request-Response Interaction Model in Constrained Networks
Izaz Ahmad Khan, Muhammad Muneeb Safdar, Farman Ullah, Syed Roohullah Jan, Fazlullah Khan, Sabir Shah · International journal of advance research and innovative ideas in education · 2016
Internet of things (IoT) is an important part of a new generation of technology that every object no matter things or human could be connected to Internet. There are many wireless protocols such as IEEE 802.11 Series, 802.15 Series and Zigbee for communication between devices. However, considering a lot of small devices are unable to communicate efficiently with constrained resources, Internet Engineering Task Force (IETF) has developed a lightweight protocol: Constrained Application Protocol (CoAP). In CoAP, the notion of “notifications ” is introduced. A client can request a server that it wants to get notified when the value changes. The server then makes a note of the client request (if it supports observation). From there on, when a value changes at server side, it notifies all registered clients. Keyword: -Constrained Environment, IoT, Resource Observation, Request -Response Model .