September 01, 2018

Link Adaptation for Grant-Free Uplink URLLC Transmissions

  • Abreu R.
  • Berardinelli G.
  • Jacobsen T.
  • Kovacs I.
  • Mogensen P.
  • Pedersen K.

Ultra-reliable and low-latency communication (URLLC) represents the most challenging set of services for 5G new radio. Uplink Grant-free transmissions is recognized as a promising solution to meet the ambitious URLLC target (1 ms latency at a 99.999% reliability). However, achieving such a high reliability comes at the expense of poor spectral efficiency, which ultimately affects the supported URLLC load. This paper proposes a resource configuration scheme including multiple modulation and coding schemes (MCSs) and power control settings to enable link adaptation for grantfree uplink transmissions. A semi-static link adaptation strategy is presented based on the cell coupling gain. The presented link adaptation scheme is shown to be capable of increasing the system outage capacity by 90%, compared to prior art using a conservative single-MCS configuration

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 ...