Mobile Multimedia Systems

Paul J.M. Havinga

Ph.D. thesis, University of Twente, February 2000, ISBN 90-365-1406-1









Recent advances in wireless networking technology and the exponential development of semiconductor technology have engendered a new paradigm of computing, called personal mobile computing. In this paradigm, the basic personal computing and communication device will be an integrated, battery-operated device, small enough to carry with you all the time. The technological challenges to establishing this paradigm are non-trivial. In particular, these devices have limited battery resources, will handle diverse data types, and will operate in environments that are insecure, time varying, and unplanned.

The research presented in this thesis addresses the design of an architecture for a mobile multimedia handheld computer that can cope with the requirements and difficulties mentioned above.

Energy efficiency and Quality of Service is important for these systems. We show that the key to energy efficiency will be achieved in the design of the higher layers of the system, its system architecture, its operating system, and the entire network. Of special importance in this are the communication channels. Quality of Service is used not only to give users an adequate level of service, but also as a tool to achieve an energy efficient system.

Specific contributions of the research described in this thesis are the design of an energy-efficient architecture for mobile multimedia systems and a reconfigurable connection switch, as well as the design of crucial wireless network functions (i.e. MAC protocol, adaptable network interface, and a model for adaptable error-correction) that are energy efficient and can support multimedia traffic.

Public defense

The public defense of the Ph.D. thesis was on February 11, 2000, at the University of Twente, Enschede, the Netherlands. You can take a look at the pictures taken during the ceremony .



The thesis has been awarded with the DOW Energy Dissertation Award 2000 (pictures).


For suggestions or comments, send mail to Paul Havinga