June 01, 2019

An Analysis of Cloud Radio Access Network Availability using Redundancy

  • Gajic B.
  • Khatibi Sina
  • Shah Kunjan

While moving towards next generation wireless technology, virtualization is a key pillar among major enablers. In addition to improved cost efficiency and less hardware dependency virtualization presents an enabler for improved network reliability including Radio Access Network (RAN) reliability by utilizing redundant virtual instances. This paper presents a framework for improved RAN availability. It describes the modes for utilizing redundancy in RAN and RAN self-healing procedures, i.e. steps taken to heal a faulty RAN VNF instance to bring into fully functional state again. In this respect the paper analyses different redundancy schemes through extensive simulations. Each scheme maps to specific set of requirement in terms of virtual resource requirement and resulting achieved availability of RAN. The novelty of the paper is in analysis on Quality of Service impact for different schemes during an event of failure within virtualized RAN. Using the presented approaches, stakeholders can accordingly tailor the network deployment in order to achieve specific set of service goals.

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 ...