A CoAP based Group Communications Protocol with QoS Consideration in Internet of Things

Abstract

In this paper, We propose a group communication method using a CoAP protocol in the Internet of Things(IoT) environment. We propose CoAP message format, CoAP message transmission system and a CoAP group communication method using the Resource Directory for this protocols. We propose a group communication method which leisure changed with QoS consideration. That method reduces the possibility of message loss by applying a different priority to each node. Each Nodes send response message for different time. This skill utilizes IoT environments like Home automation, smart greenhouses, smart building and contributes to provide a seamless network environment.