Investigating and modelling of task offloading latency in edge-cloud environment

Abstract

Recently, the number of Internet of Things (IoT) devices connected to the Internet has increased dramatically as well as the data produced by these devices. This would require offloading IoT tasks to release heavy computation and storage to the resource-rich nodes such as Edge Computing and Cloud Computing. However, different service architecture and offloading strategies have a different impact on the service time performance of IoT applications. Therefore, this paper presents an Edge-Cloud system architecture that supports scheduling offloading tasks of IoT applications in order to minimize the enormous amount of transmitting data in the network. Also, it introduces the offloading latency models to investigate the delay of different offloading scenarios/ schemes and explores the effect of computational and communication demand on each one. A series of experiments conducted on an EdgeCloudSim show that different offloading decisions within the Edge-Cloud system can lead to various service times due to the computational resources and communications types. Finally, this paper presents a comprehensive review of the current state-of-the-art research on task offloading issues in the Edge-Cloud environment.