Scalable Oriented-Service Architecture for Heterogeneous and Ubiquitous IoT Domains

摘要

Internet of Things (IoT) grows quickly, and 50 billion of IoT devices will beinterconnected by 2020. For the huge number of IoT devices, a high scalablediscovery architecture is required to provide autonomous registration andlook-up of IoT resources and services. The architecture should enable dynamicupdates when new IoT devices are incorporated into Internet, and changes aremade to the existing ones. Nowadays in Internet, the most used discoveryarchitecture is the Domain Name System (DNS). DNS offers a scalable solutionthrough two distributed mechanisms: multicast DNS (mDNS) and DNS ServiceDirectory (DNS-SD). Both mechanisms have been applied to discover resources andservices in local IoT domains. However, a full architecture has not still beendesigned to support global discovery, local directories and a search engine forubiquitous IoT domains. Moreover, the architecture should provide othertransversal functionalities such as a common semantic for describing servicesand resources, and a service layer for interconnecting with M2M platforms andmobile clients. This paper presents an oriented-service architecture based onDNS to support a global discovery, local directories and a distributed searchengine to enable a scalable looking-up of IoT resources and services. Thearchitecture provides two lightweight discovery mechanisms based on mDNS andDNS-SD that have been optimized for the constraints of IoT devices to allowautonomous registration. Moreover, we analyse and provide other relevantelements such semantic description and communications interfaces to support theheterogeneity of IoT devices and clients. All these elements contribute tobuild a scalable architecture for the discovery and access of heterogeneous andubiquitous IoT domains.