Towards a Scalable User-Space QUIC Network Stack

  • Duan Yufeng
  • Gallo M.
  • Giaccone P.
  • Laufer R.
  • Traverso S.

The introduction of kernel-bypass techniques that enable high-speed packet processing has fostered the development of scalable servers and middleboxes through the introduction of customized user-space network stacks. Despite their diffusion, such solutions are tailored to a single application or network protocol preventing their wide deployment. Motivated by the introduction of a modular TCP stack and high-speed packet processing in Click, we explore the case of a modular network stack in which multiple protocols and applications coexist. To this end, we present a modular design of the QUIC transport protocol, cQUIC, that can easily coexist with others thanks to Click flexibility. As a prototype, we develop a set of Click elements to provide server-side functionalities that are shown to be orders of magnitude more scalable than the QUIC server prototype provided by Google. However, our preliminary evaluation demonstrates that QUIC scalability is limited by the significant cost of cryptographic operations, and by analysing traffic traces collected in two different networks, we show this issue might have deep implications on the overall server engineering and costs.

Recent Publications

August 09, 2017

A Cloud Native Approach to 5G Network Slicing

  • Francini A.
  • Miller R.
  • Sharma S.

5G networks will have to support a set of very diverse and often extreme requirements. Network slicing offers an effective way to unlock the full potential of 5G networks and meet those requirements on a shared network infrastructure. This paper presents a cloud native approach to network slicing. The cloud ...

August 01, 2017

Modeling and simulation of RSOA with a dual-electrode configuration

  • De Valicourt G.
  • Liu Z.
  • Violas M.
  • Wang H.
  • Wu Q.

Based on the physical model of a bulk reflective semiconductor optical amplifier (RSOA) used as a modulator in radio over fiber (RoF) links, the distributions of carrier density, signal photon density, and amplified spontaneous emission photon density are demonstrated. One of limits in the use of RSOA is the lower ...

July 12, 2017

PrivApprox: Privacy-Preserving Stream Analytics

  • Chen R.
  • Christof Fetzer
  • Le D.
  • Martin Beck
  • Pramod Bhatotia
  • Thorsten Strufe

How to preserve users' privacy while supporting high-utility analytics for low-latency stream processing? To answer this question: we describe the design, implementation and evaluation of PRIVAPPROX, a data analytics system for privacy-preserving stream processing. PRIVAPPROX provides three properties: (i) Privacy: zero-knowledge privacy (ezk) guarantees for users, a privacy bound tighter ...