Research Article
Mobile Content Offloading in Database-Assisted White Space Networks
@INPROCEEDINGS{10.1007/978-3-319-40352-6_11, author={Suzan Bayhan and Gopika Premsankar and Mario Di Francesco and Jussi Kangasharju}, title={Mobile Content Offloading in Database-Assisted White Space Networks}, proceedings={Cognitive Radio Oriented Wireless Networks. 11th International Conference, CROWNCOM 2016, Grenoble, France, May 30 - June 1, 2016, Proceedings}, proceedings_a={CROWNCOM}, year={2016}, month={6}, keywords={White spaces Dynamic spectrum access Mobile opportunistic offloading Content delivery White space database WSDB}, doi={10.1007/978-3-319-40352-6_11} }- Suzan Bayhan
Gopika Premsankar
Mario Di Francesco
Jussi Kangasharju
Year: 2016
Mobile Content Offloading in Database-Assisted White Space Networks
CROWNCOM
Springer
DOI: 10.1007/978-3-319-40352-6_11
Abstract
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.