QoS Support for Mobile Users Using NSIS

Resource reservations in the Internet become more and more important with the advent of real-time multimedia services like Voiceover-IP and IPTV. At the same time we see an increasing interest in accessing Internet services by using mobile devices. In this paper we describe how Quality-of-Service guarantees can be achieved in mobile environments across different domains using the Next Steps in Signaling (NSIS) framework. We provide an analysis of mobility scenarios in combination with QoS signaling and propose to use an additional node local Flow Information Service element that supplies the necessary mobility support within NSIS capable mobility-aware nodes. We show that reservations can be setup quickly along the new path after a handover happened. Even the tear down of the reservation of the old path after a successful handover is performed quickly.