18th International workshop on
Network and Operating Systems Support
for Digital Audio and Video
Braunschweig, Germany    May 28-30, 2008

Cooperative Networking as Boosting Tool for Internet Interactivity

Paulo Mendes, INESC Porto


In the most recent years, we have assisted to an increasing popularity of peer-to-peer applications, social networks and wireless technologies. Such tendency is still bound to increase, as shown by the support that wireless is currently offering to support human interaction in the information era. There are however serious limitations to this growth given that wireless networks are unreliable due to signal fading and bandwidth limitations. Answers to the current limitations are being worked out on different OSI Layers. For instance, solutions may rely on multimedia coding, trying to increase the reliability of communications and quality of multimedia content. At the network level, cooperation models are strongly emerging, in particular due to the sharing possibilities that the wireless media offers. For instance, communication where the user is actively involved in the provider chain, user-spreadable models, are emerging (e.g. FON, Wisher). These new models have as main factor cooperation. They rely on users to share their already existing Internet access, increasing the users' probability of being always and easily connected. While extremely appealing, emerging network cooperation models accentuate the unreliable facet of wireless networks. In this scenario, cooperative methods that are capable of intelligently forming cooperative entities are a promising way to improve the efficiency of wireless communications. Last but not the least, the use of cooperative networking models and methods is a first step towards a paradigm shift in Internet interactivity and multimedia sharing. This talk is dedicated to the topic of cooperative networking, its impact on current Internet connectivity models, as well as its impact in social interaction and multimedia sharing. The talk starts by providing an overview on network cooperation, highlighting different models and methods across different OSI Layers. We will then speak about the impact that cooperative networking has on multimedia coding and Internet models. Examples of failed cooperative systems and requirements for successful approaches are to be debated.


Paulo Mendes ( graduated (93) in Informatics Engineering from the University of Coimbra, M.Sc. (98) in Electrical and Computer Engineering from the Technical University of Lisbon, Ph.D. (03) in Informatics Engineering from the University of Coimbra. During his Ph.D., he spent 3 years as a Visiting Scholar at Columbia University, US. Since 1993, he has participated in several European projects and actions such as COST263, Telematics Applications/Safety-net, COST290 and IST Ambient Networks. From 1996 to 2003, he was a researcher at the Laboratory of Communications and Telematics (LCT) of the Research Center of the University of Coimbra (CISUC). From 2003 to 2007 he was a Senior Researcher at NTT DoCoMo Euro-labs, Germany. Currently, he is leading the Internet Architectures and Networking (IAN) area of UTM, in INESC Porto, Portugal. He is a member of the IEEE Communication Society and a contributor to IETF. His major research interests are Internet architectures for mobile multihomed devices, augmented routing and forwarding schemes, and novel models and methods for cooperative networking.