Mobile content offloading in database-assisted white space networks

Suzan Bayhan*, Gopika Premsankar, Mario Di Francesco, Jussi Kangasharju

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

3 Citations (Scopus)
26 Downloads (Pure)


Mobile data offloading leverages more affordable or even free network capacity to reduce the traffic experienced by cellular operators through their limited over-the-air resources. One way to harvest free capacity is to employ the white space, namely, frequencies that are assigned to licensed users but are not actively utilized, as long as no harmful interference is generated. In this article, we characterize the benefits of harnessing node contacts for mobile content offloading through dynamic spectrum access assisted by a white space database (WSDB). We take a content-centric approach and model the selection of distributors among the subscribers of each content served through a base station. We formulate an optimization problem to maximize the offloading gain based on realistic settings. We show that such a problem is NP-hard and devise efficient heuristics for practical mobile data offloading. Our results show that the offloading gain allowed by white space is significant even when WSDB data are inaccurate.

Original languageEnglish
Title of host publicationCognitive Radio Oriented Wireless Networks - 11th International Conference, CROWNCOM 2016, Proceedings
PublisherSpringer Verlag
Number of pages13
ISBN (Print)9783319403519
Publication statusPublished - 2016
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Cognitive Radio Oriented Wireless Networks - Grenoble, France
Duration: 30 May 20161 Jun 2016
Conference number: 11

Publication series

NameLecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST
ISSN (Print)18678211


ConferenceInternational Conference on Cognitive Radio Oriented Wireless Networks
Abbreviated titleCROWNCOM


  • Content delivery
  • Dynamic spectrum access
  • Mobile opportunistic offloading
  • White space database
  • White spaces
  • WSDB

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