Hummingbird: Fast, Flexible, and Fair Inter-Domain Bandwidth Reservations
Abstract: The current Internet lacks quality-of-service guarantees for real-time applications like video calls and gaming, cloud-based systems, financial transactions, telesurgery, and other remote applications that benefit from reliable communication. To address this problem, this paper introduces Hummingbird: a novel, lightweight bandwidth-reservation system that provides fine-grained inter-domain reservations for end hosts and introduces several improvements over previous designs. Hummingbird enables flexible and composable reservations with end-to-end guarantees, and addresses an often overlooked, but crucial, aspect of bandwidth reservation systems: incentivization of network providers. Hummingbird represents bandwidth reservations as tradeable assets which allows markets to emerge that ensure fair and efficient resource allocation and encourage deployment by remunerating providers. This incentivization is facilitated by decoupling reservations from network identities, which enables novel control-plane mechanisms and allows us to design a control plane based on smart contracts. Hummingbird also provides an efficient reservation data plane which streamlines the processing on routers and thus simplifies the implementation, deployment, and traffic policing while maintaining robust security properties.
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