End-to-end QoS provisioning across heterogeneous domains

Heterogeneity with respect to networking technology is increasing, for example, considering QoS support. Different QoS have been developed for the Internet and for ATM networks. In the context of the Internet, integrated services (IntServ) as well as differentiated services (DiffServ) are considered. As a result, networking scenarios with different QoS models being applied in different domains are very probable. Within this paper a Inter Domain QoS router is introduced and its functionality is outlined with respect to RSVP based domains and to ATM domains. Reduced signaling of RSVP, connection establishment and connection re-negotiation is supported within the ATM domain in order to follow the dynamic QoS changes of RSVP. A local testbed has been established and simulation experiments have been conducted in order to evaluate the performance of the Inter Domain QoS router.