A taxonomy of service discovery approaches in IoT

Nowadays, Internet of things (IoT) is becoming the trademark technology for connecting real-world physical entities to provide specific services and enable the creation of a smart world. Due to the growing number of connected objects and the lack of standardization that meet IoT requirements, discovering and selecting the desirable service is becoming a challenging issue. In the literature, many works have been put forward to address service discovery in IoT. In this paper, we propose a complete classification of these works to provide a more elaborated taxonomy that includes several aspects and criteria. Then, we compare some of the most recent approaches according to several performance criteria, followed with a discussion to set up the future research directions.