Abstract
Abstract. The Internet of Things (IoT) is an infrastructure that interconnects uniquely-identifiable devices using the Internet. By interconnecting everyday appliances, various monitoring and physical mashup applications can be constructed to improve people’s daily life. However, IoT devices created by different manufacturers follow different proprietary protocols and cannot communicate with each other. This heterogeneity issue causes different products to be locked in multiple closed ecosystems that we call IoT silos. In order to address this issue, a common industrial solution is the hub approach, which implements connectors to communicate with IoT devices following different protocols. However, with the growing number of proprietary protocols proposed by device manufacturers, IoT hubs need to support and maintain a lot of customized connectors. Hence, we believe the ultimate solution to address the heterogeneity issue is to follow open and interoperable standard. Among the existing IoT standards, the Open Geospatial Consortium (OGC) SensorThings API standard supports comprehensive conceptual model and query functionalities. The first version of SensorThings API mainly focuses on connecting to IoT devices and sharing sensor observations online, which is the sensing capability. Besides the sensing capability, IoT devices could also be controlled via the Internet, which is the tasking capability. While the tasking capability was not included in the first version of the SensorThings API standard, this research aims on defining the tasking capability profile and integrates with the SensorThings API standard, which we call the extended-SensorThings API in this paper. In general, this research proposes a lightweight JSON-based web service description, the “Tasking Capability Description”, allowing device owners and manufacturers to describe different IoT device protocols. Through the extended- SensorThings API, users and applications can follow a coherent protocol to control IoT devices that use different communication protocols, which could consequently achieve the interoperable Internet of Things infrastructure.
Highlights
1.1 BackgroundThe Internet of Things (IoT) has been attracting attentions from various fields in recent years
IoT devices created by different manufacturers follow different proprietary protocols and cannot communicate with each other
While most of existing web service descriptions are based on XML format (Chinnici et al, 2007; Kopecky et al, 2008), they may not be suitable for resource-constraint IoT devices
Summary
The Internet of Things (IoT) has been attracting attentions from various fields in recent years. While the Internet provides the global and pervasive connectivity infrastructure, the IoT concept was proposed to connect everyday devices to the Internet. The Internet of Things (IoT) is an infrastructure that interconnects uniquely-identifiable devices using the Internet. The IoT concept mainly focused on the identification and tracking of physical things. Technologies like the bar code and Radio Frequency Identification (RFID). Many RFID-based applications were proposed, such as warehouse management and logistic applications
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