Semantic Web in Internet of Things (IoT)

Things in the Internet of Things (IoT) are usually equipped with sensors or an actuator. Sensors enable to measure e.g. temperature, air humidity, light, motion, etc. Furthermore things can connect to the other things. However there is no interoperability standard for connecting heterogeneous devices from different vendors in the IoT. Instead there are several consortia and vendors which work on their own solution, (e.g. Smart Home standards).


We develop the so-called Ad-hoc Semantic Protocol (ASIP). This protocol should support the interoperability in the IoT. This protocol combines both: an application protocol and semantically annotated information. ASIP is independent of the physical transportation layer. The information is self-described and independent of the used vocabulary. It can built an ad-hoc and mobile network. ASIP uses an asynchronous and stateless communication model. The protocol especially supports the P2P architecture. The data structure is based on interest and knowledge.

iot ASIP in the OSI reference model
Fig.1: ASIP in the OSI reference model

Figure 1 illustrates that ASIP can be applied to the Class 1 devices as application protocol and to the Class 0 devices even as layer 3 protocol. According to RFC 7228, Class 0 devices are very constrained like sensor-motes and connected via gateway to the Internet. Class 1 devices are less constrained and can connect directly to the internet e.g. via CoAP. Other constrained M2M protocols are e.g. 6LoWPAN and MQTT.


Related Work

We see our work on ASIP related to the IRTF Thing-to-Thing and the Information-Centric Networking Research Groups, and the W3C Web of Things Interest Group


Publications

The Ad hoc Semantic Internet Protocol (ASIP) for Constrained Devices
Kristina Sahlmann, Thomas Schwotzer and Bettina Schnor
Accepted for 15th GI/ITG KuVS Fachgespräch "Drahtlose Sensornetze"
Augsburg, Germany, September 2016


MOCAP: Towards the Semantic Web of Things
Kristina Sahlmann and Thomas Schwotzer
11th International Conference on Semantic Systems
Aachen, Germany, 2015


Semantische Interoperabilität in Sensornetzen
Kristina Sahlmann and Thomas Schwotzer
Nachhaltige Mobilität, Energiewende und Industrie 4.0, ISBN: 978-3-8305-3575-1
BWV Berliner Wissenschafts-Verlag, 2015