END-TO-END QOS IN INTERDOMAIN ROUTING

Many real-time multimedia and critical applicationscan migrate to Internet, provided it can support better QoS in an Inter-domain environment. The main challenges on this front can be split into two parts; the first part is to develop mechanisms for information exchange, signaling and path set-up. The second part is to find an optimal inter-domain path subjected to multiple QoS constraints. We address the second part in this paper. Providing end-to-end Quality of Service (QoS) guarantees for interdomain routing remains a challenge for next generation Internet. As various realtime, mission-critical, and bandwidth-sensitive applications are migrating to the Internet Protocol (IP) Networks the, need for end-to-end QoS is becoming acute. The paper presents a novel approach to achieve end-to-end QoS support by proposing a new Alliance Network model. The most important aspect of the proposed model is its compatibility with existing BGP infrastructure, such that the traditional BGP traffic continues in a normal fashion. The Alliance Network sets-up interdomain paths for premium traffic that require specific QoS guarantees using interdomain MPLS tunnels with resource reservation. The Alliance Network provides enhanced geographical reach and market penetration for the alliance partners through premium service offerings.