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We revisit the long-standing problem of providing network QoS to applications, and propose the concept of judicious QoS -- combining the cheaper, best effort IP service with the cloud, which offers a highly reliable infrastructure and the ability to add in-network services, albeit at higher cost. Our proposed J-QoS framework offers a range of reliability services with different cost vs. delay trade-offs, including: i) a forwarding service that forwards packets over the cloud overlay, ii) a caching service, which stores packets inside the cloud and allows them to be pulled in case of packet loss or disruption on the Internet, and iii) a novel coding service that provides the least expensive packet recovery option by combining packets of multiple application streams and sending a small number of coded packets across the more expensive cloud paths. We demonstrate the feasibility of these services using measurements from RIPE Atlas and a live deployment on PlanetLab. We also consider case studies on how J-QoS works with services up and down the network stack, including Skype video conferencing, TCP-based web transfers and cellular access networks. 

We introduce Liquid Data Networking (LDN), an ICN architecture that is designed to enable the benefits of erasure-code enabled object delivery. A primary contribution of this work is the introduction of SOPIs, a simple and efficient naming mechanism enabling clients to concurrently download encoded data over multiple interfaces for the same object, to optimize caching efficiency, and to enable seamless mobility. LDN offers a clean separation of security into object security and data packet security. An evaluation of the architecture and its use with various types of erasure codes is provided.