Design a Model for CoAP by Considering Delay Priority and Congestion for IoT Applications

Abstract

With the advancement of technology, people across the globe want to become more connected over the internet. As technology is growing, the Internet of Things IoT has become one of the most eminent technologies. In this technology, billions of devices such as sensors, actuators, gateways, and controllers are connected to one another in an efficient manner and provide countless applications in every domain. IoT is a paradigm where the real world is connected to the virtual world through the internet. Various communication technologies that are available starting from constrained to unconstrained features have been classified for IoT. Short range low power communication protocols are like a constrained wireless sensor network WSN that communicates over the network with various protocols and interfaces. IoT devices are resource constrained. Many heterogeneous devices need to be connected through communication protocols and interfaces to the internet. Due to its resource constrained nature, there are many communication challenges like the requirement of low power computation, less memory intensive routing protocol, deployment enhanced WiFi, addressing and identification, and high speed. If IoT devices connect through the internet directly, it would require an IP stack. IP stack is highly power and memory intensive. So, IoT devices should be connected using low power technologies. Various protocol has been defined at the various layer of communication. In the application layer, the constrained application protocol CoAP is present for resource constrained devices. CoAP is one of the promising messaging protocols designed using REST architecture for optimizing the performance of constrained devices and networks to enable effective communication between clients and servers. A request/response interaction model between endpoints is provided by CoAP which also supports an in built mechanism for service resource discovery. newline