February 06, 2017

Advanced Split-TCP with End-to-End Protocol Semantics over Wireless Networks

  • Calin D.
  • Kim B.
  • Lee I.

The worldwide mobile traffic is growing rapidly and more than 90% of the internet traffic relies on the Transmission Control Protocol (TCP) protocol, which is known to have a poor performance over unreliable wireless networks. One of the promising TCP enhancement mechanisms that are being considered by the wireless network operators is the Split-TCP. It is also quite well known that the Split-TCP suffers from broken end-to-end protocol semantics, and this may be a significant drawback in some scenarios, where large file transmissions may get aborted after consuming a large volume of network resources. There are various enhancements to overcome this pitfall, but at the expense of a loss in performance. In this paper, we propose a novel Advanced Split-TCP (AS-TCP) mechanism, designed with the goal to improve significantly the application throughput while maintaining the end-to-end protocol semantics down to the byte level, as through the conventional TCP. Our findings indicate that the TCP throughput gains achieved through AS-TCP with respect to a conventional TCP may be above 60% over a 4G LTE network. Furthermore, AS-TCP may enable TCP throughput gains in excess of 200% for some network and traffic conditions. The throughput gains are expected to be even greater when advanced radio technologies are deployed. Hence, we anticipate that AS-TCP will enable the Split-TCP mechanism to be widely deployed in both current and next generation networks, such as 5G.

View Original Article

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 ...