Today's Internet is composed of many interconnected autonomous networks, or domains, that operate independently according to their own set of policies. However, providing end-to-end quality of service (QoS) requires a joint effort by all the networks. One approach used in practice is built upon service level agreements (SLA) between domains. When using this approach, one network offers others forwarding services with certain guarantees on QoS. The concatenation of these SLAs then ensures end-to-end QoS for end users.
Our work focuses on the application of voice over IP (VoIP) and illustrates how measurement-based admission control and SLAs can be designed to provide end-to-end QoS in a dynamic, fully decentralized way. A game-theoretic model for the proposed scheme is developed to demonstrate its feasibility and some of its interesting properties.