Collaborative Networking

We investigate novel network architectures, in particular in the areas of content distribution and content management. Our current primary focus is in information-centric networking, mobile opportunistic content sharing and green networking. Our work is experimentation-oriented and in our research we combine modeling, simulations, and practical experiments. In opportunistic content sharing, we have developed the floating content paradigm where information is published to a particular location and then replicated in an ad hoc manner between mobile devices, attempting to keep the information available in the area where it was published. Our work assumes no support from the infrastructure.

We have developed in-network caching architectures and devised caching mechanisms for information-centric networks. Our solutions cover simple, decentralized caching algorithms and their evaluation. In the area of green networking, we have continued our work on data center cooling optimization solutions, with work on cold aisle containment and its evaluation.

Currently we are extending this work to include heat harvesting and we have built a greenhouse where we are experimenting if the exhaust heat from computers is sufficient to heat up the greenhouse sufficiently
to allow for plants to grow.

Key publications:

• Joerg Ott, Esa Hyytiä, Pasi Lassila, Tobias Vaegs, Jussi Kangasharju, Sougata Santra. Floating Content for Probabilistic Information Sharing. Pervasive and Mobile Computing, 7(6):671–689, December 2011.
• Mikko Pervilä, Jussi Kangasharju. Cold Air Containment. In Proceedings of ACM SIGCOMM Workshop on Green Networking and Smart Systems, Toronto, Canada, August 2011.
• Walter Wong, Marcus V. L. Giraldi, Mauricio F. Magalhäes, Jussi Kangasharju, Content Routers. Fetching Data on Network Path. In Proceedings of IEEE ICC, Kyoto, Japan, June 2011.
• Esa Hyytiä, Jorma Virtamo, Pasi Lassila, Jussi Kangasharju, Joerg Ott. When Does Content Float? Characterizing Availability of Anchored Information in Opportunistic Content Sharing. In Proceedings of IEEE Infocom, Shanghai, China, April 2011.
• Joerg Ott, Esa Hyytiä, Pasi Lassila, Tobias Vaegs, Jussi Kangasharju. Floating Content: Information Sharing in Urban Areas. In Proceedings of IEEE International Conference on Pervasive Computing and Communications, Seattle, WA, March 2011.
• Mikko Pervilä, Jussi Kangasharju. Running Servers around Zero Degrees. Computer Communications Review, 41(1):96–101, January 2011.

People:

• Jussi Kangasharju
• Mikko Pervilä
• Sougata Santra