Application-Aware TCP

  • Francini A.
  • Joseph D. Beshay
  • Ravi Prakash
  • Swair Shah

TCP congestion control is the primary enabler for the coexistence of multiple application flows on a single link. It is designed to achieve long-term fairness between the multiplexed flows in a fully distributed manner. However, long-term fairness between TCP flows does not always translate into Quality-of-Experience (QoE) fairness between the users of the Internet applications that generate those flows. Many applications today exhibit traffic patterns that are far different from those that originally motivated the emphasis on long-term fairness and so end up being under-served by traditional congestion control. We explore the idea of dynamically adjusting the parameters that control the congestion control algorithm of the TCP source to the QoE needs of each type of traffic. This approach preserves the distributed nature of TCP and resides entirely within the transport layer of the application server: the transport client, the application layer, and the link layer are not affected. We implement an instance of our Application-Aware TCP concept in the Linux kernel and show that it improves the response time of web browsing and the video quality of adaptive video streams without negative impact on background traffic.

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 ...