My main research interests are in IP networks, and in energy-efficiency, but also in how to get rid of IP, i.e., various "Future Internet" topics. I like constuctive research, where we actually build stuff, and experiment with it. You won't find papers with purely theoretical discussion from my team, rather lots of C-code instead.

My research group has over 20 people working on various topics. My current research projects are:

The Future Internet Research Programme of Finland (ICT SHOK FI): this is my main focus area, research within the national public-private partnership on Future Internet. Here my team works with new concepts for SLA-guaranteed Internet connectivity for SMEs, energy-efficient communication for mobile networks, in particular the handset, and new concepts for reliable transport, to replace TCP from the Internet. I'm also the Academic Coordinator of the programme, looking after the Finnish universities and research institutes in the programme.

Celtic 100 Gbit/s Carrier-Grade Ethernet Transport Technologies (100GET) 2008-2010: here my group looks at architectural issues and how to make Ethernet-based networks scale to thousands or even millions of hosts. Particular topics include the scalability of legacy Ethernet, and RBridges.

New concepts for messaging platforms: this is a subcontracted work where we investigate ways to build a messaging platform that can merge together very different communication mediums and familiar Email type of messaging applications.

Intelligent Structural Health Monitoring (ISMO) 2008-2012: this is a research project funded through the TKK internal . My team works with sensor network routing and transport issues, but also service discovery.

Trilogy 2009-2011: this is an EU FP7 research project where my researchers work as part of the Nokia team on issues related to multipath transport and routing.

Datacenters to Finland (DC2F): we study energy-efficiency and heat reuse in datacenters. Specific targets are high-voltage DC (HVDC), energy-efficient networking and switching, and building construction and heat reuse.

Energy and Cost Efficiency for Wireless Access (ECEWA): this project is about mobile access and how make the network simpler and lower the energy consumption of the network as a whole.

GOODNET - control and care in risk-aware networking: this project is about understanding OAM and developing operators' core networks towards simpler and more robust operation. My team works in HIIT and is mostly involved in PTPv2 and Y.1731.

I do a lot of standardization work in the IETF, and I was the co-chair of the NSIS working group.

Some past projects

  • Algorithms for Broadband Access (ABI,2006-2009): my team studied e.g. NSIS protocols, DCCP as a transport protocol for VoIP, and Forward Error Correction codes on mobile phones.
  • Web Services in Ad-hoc and Mobile Infrastructure (WeSAHMI,2006-2007): here we implemented a push-service over SIP with two example use cases, a Push RSS services and a service platform for an airline.
  • Interconnected Broadband Home Networks (Inhonets, 2006-2007): here we looked at a number of topics related to service for home networks, e.g., how to provide services between homes, and how to easily configure a firewall on a home gateway.
  • Seamless Service Interworking in Heterogeneous Mobile and Ad-Hoc Networks (SESSI, 2004-2005): in SESSI our main task was to design a distributed SIP protocol, which would allow setting up SIP-based sessions within an ad-hoc network and between ad-hoc and Internet-based users.
  • Mobile IP-based Network Demonstrator (IST-MIND, 2001-2002) was a follow-up to BRAIN and continued with the same topics, building eventually a demonstrator. I did my PhD thesis based on the work done in BRAIN and MIND.
  • Broadband Access for IP Networks (IST-BRAIN, 2000-2001) was an FP integrated project looking at wireless access and IP-based mobility management and QoS.
  • Mobile Office Workstations Using GSM Links (Mowgli II 1998-1999) investigated Internet data transfers over very slow links, in the order of kilobits. We also build a wireless network simular Seawind from which I did my MSc. thesis.