Improving Topic-Based Data Exchanges among IoT Devices

Fu Chen,Meijiao Duan,Jianming Zhu,Peng Liu,Kai Hwang,Youwei Wang,Sheng Gao,Yanmei Zhang,Honghao Gao

doi:10.1155/2020/8884924

Abstract

Data exchange is one of the huge challenges in Internet of Things (IoT) with billions of heterogeneous devices already connected and many more to come in the future. Improving data transfer efficiency, scalability, and survivability in the fragile network environment and constrained resources in IoT systems is always a fundamental issues. In this paper, we present a novel message routing algorithm that optimizes IoT data transfers in a resource constrained and fragile network environment in publish-subscribe model. The proposed algorithm can adapt the dynamical network topology of continuously changing IoT devices with the rerouting method. We also present a rerouting algorithm in Message Queuing Telemetry Transport (MQTT) to take over the topic-based session flows with a controller when a broker crashed down. Data can still be communicated by another broker with rerouting mechanism. Higher availability in IoT can be achieved with our proposed model. Through demonstrated efficiency of our algorithms about message routing and dynamically adapting the continually changing device and network topology, IoT systems can gain scalability and survivability. We have evaluated our algorithms with open source Eclipse Mosquitto. With the extensive experiments and simulations performed in Mosquitto, the results show that our algorithms perform optimally. The proposed algorithms can be widely used in IoT systems with publish-subscribe model. Furthermore, the algorithms can also be adopted in other protocols such as Constrained Application Protocol (CoAP).

Highlights

Introduction eInternet of ings (IoT) has emerged as the evolution of the technology which covers a wide variety of devices and system platforms, such as embedded systems, networked sensors, actuators, and smart home devices
Our proposed algorithms can adapt the dynamical network topology and are capable of adopting continuously changing devices with rerouting method in IoT system. rough experimental results, we have demonstrated efficiency of our algorithms for message routing, and dynamically adapting the continually changing device and network topology
We have evaluated our algorithms with a prototype with a Mosquitto based on Message Queuing Telemetry Transport (MQTT) protocol

Summary

Introduction

Introduction eInternet of ings (IoT) has emerged as the evolution of the technology which covers a wide variety of devices and system platforms, such as embedded systems, networked sensors, actuators, and smart home devices. Erefore, the cross-platform and crossapplication data flows among IoT devices are often extremely important. Need of the Data Exchange Efficiency Problem in IoT. Erefore, improving the usage efficiency of the network and reducing power usage in IoT scenarios are extremely important. As a promising data communication protocol in IoT, MQTT is a machine-to-machine (M2M), lightweight publish-subscribe messaging transport protocol. We focus on data exchange efficiency in an environment where there is a limited Internet access or there are serious network jitter problems for several hundred miles around. E emphasis is transferring data based on subject-based route to a data center It is about a new gateway and topic-based routing. MQTT in IoT is used in data exchange which is different from corresponding sensor network about data integration

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