Mobility in a future Internet

Mobility of users in a future Internet has become a reality due to highly mobile end-systems. However, the new dimension of protocol functionality, Mobile IP, resource control, quality of service (QoS) support and AAA (authentication, authorization and accounting) features extended by charging schemes are still to be integrated effectively. Therefore, this position paper addresses these three areas of research concern, discusses basic concepts and outlines major problem fields still to be worked on.