A Proposal for a Publish/Subscribe, Disruption Tolerant Content Island for Fog Computing

The performance of applications for the Internet of Things (IoT) depends on the availability of effective transport services offered by the underlying network. In this sense, Fog Computing aims to provide alternative networking models that offer higher fluidity in distributing in-network functions, in addition to allowing fast and scalable processing and exchange of information. In this paper we present the architecture and a working prototype of a fog computing "content island" which interconnects groups of "things" packed-up together to interchange data and processing among themselves and with other content islands. These islands are based on the integration of a publish/subscribe system with DTN (Disruption Tolerant Networks) techniques to provide a higher flexibility with respect to data and computation sharing. Some preliminary results regarding the prototype performance are also given.