June 06, 2018

The Density of Millimeter Wave Access Points in Dense Urban Areas and its Effect On Link Availability in the Presence of Blocking

  • Ewe L.
  • Halbauer H.

Radio access networks of the next generation (5G) are designed to be capable to handle the increasing demand for bandwidth and low latency as required for services like enhanced Mobile Broadband (eMBB), augmented reality or applications of the "tactile internet", that cannot be provided satisfactorily by today's radio access technologies. An extension of the used frequency bands towards millimeter wave bands with frequencies in the range of tens of Gigahertz that puts bandwidths of several hundreds of Megahertz to the operator's disposal is the most promising approach for the upcoming demands. Millimeter wave radio communications however implicate propagation conditions which are dominated by line-of-sight links with only few signal components contributed by reflections. Under such conditions blocking by physical obstacles within the signal path plays a major role for the availability and life time of a millimeter wave link. In this paper, we present our investigations which show the influence of the density of deployment of mm-wave access points in a dense urban area on the availability and reliability of mm-wave links.

View Original Article

Recent Publications

January 01, 2019

Friendly, appealing or both? Characterising user experience in sponsored search landing pages

  • Bron M.
  • Chute M.
  • Evans H.
  • Lalmas M.
  • Redi M.
  • Silvestri F.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Many of today's websites have recognised the importance of mobile friendly pages to keep users engaged and to provide a satisfying user experience. However, next to the experience provided by the sites themselves, ...

January 01, 2019

Analyzing uber's ride-sharing economy

  • Aiello L.
  • Djuric N.
  • Grbovic M.
  • Kooti F.
  • Lerman K.
  • Radosavljevic V.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Uber is a popular ride-sharing application that matches people who need a ride (or riders) with drivers who are willing to provide it using their personal vehicles. Despite its growing popularity, there exist ...

January 01, 2019

The paradigm-shift of social spambots: Evidence, theories, and tools for the arms race

  • Cresci S.
  • Petrocchi M.
  • Pietro R.
  • Spognardi A.
  • Tesconi M.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Recent studies in social media spam and automation provide anecdotal argumentation of the rise of a new generation of spambots, so-called social spambots. Here, for the first time, we extensively study this novel ...