A Real-Time Search Engine for the Web of Things 

The increasing penetration of the real world with embedded and globally 
networked sensors leads to the formation of the Internet of Things, offering 
global online access to the current state of the real world. We argue that on 
top of this real-time data, a Web of Things is needed, a software 
infrastructure that allows the construction of applications involving 
sensorequipped real-world entities living in the Internet of Things. A key 
service for such an infrastructure is a search engine that supports lookup of 
real-world entities that exhibit a certain current state as perceived by 
sensors. In contrast to existing Web search engines, such a real-world search 
engine has to support searching for rapidly changing state information 
generated by sensors. In this paper, we show how the existing Web 
infrastructure can be leveraged to support publishing of sensor and entity 
data. Based on this we present a real-time search engine for the Web of Things.