The International Computer Science Institute
is pleased to present a talk:

"User-Aware Adaptive Multimedia Applications in Heterogeneous Scenarios"

Pedro Ruiz ICSI
pedrom icsi.berkeley.edu

Wednesday, June 16, 2004 ICSI, Conference Room 6A 12:30 pm

With the advent of the new wireless technologies allowing for higher data rates, the provision of high quality multimedia services over the upcoming wireless and mobile networks is gaining momentum. These future mobile networks are witnessed to consist of a variety of heterogeneous wireless access technologies connected to a high-speed IP datagram-based core network. The heterogeneity of these networks in terms of network capacities, and terminal capabilities among others, is expected to require an additional degree of flexibility at the different layers. In many of these access technologies the network-layer QoS mechanisms cannot guarantee a stable service because most of the variability is due to the link layer itself. Thus, we beleive that the use of adaptive applications being able to change their settings to adapt to the available network resources will become a common element in these future networking scenarios. We will present our proposed approach called user-aware adaptive applications, by which applications are able to intelligently maintain a good user-perceived QoS even when the network conditions are highly variable. We will show empirical results which demonstrate that the proposed approach is able to outperform traditional multimedia internetworking applications even in extremely variable scenarios such as ad hoc networks.