On the Privacy and Utility Tradeoff in Database-Assisted Dynamic Spectrum Access

Ahmed M. Salama, Ming Li, Loukas Lazos, Yong Xiao, Marwan Krunz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In dynamic spectrum access, commercially-operated database servers are often used to assist the opportunistic users (OUs) to query and access spectrum vacancies of incumbent users (IUs). The query and answer process in such DSA architectures introduce significant privacy concerns for potential leakage of the sensitive operational details of the IUs, especially their locations. Existing privacy-preserving mechanisms such as location cloaking or spatial obfuscation can be used to hide IUs' locations. They however cannot guarantee the interference from all surrounding access-allowed OUs staying under a given limit. In addition, the spectrum utilization (i.e., transmission opportunities) of OUs should also be considered in the design of mechanisms. The complex three-way tradeoff among privacy, interference and utility has not been systematically studied in the literature. In this paper, we first endeavor to tackle this challenge, by introducing a privacy zone within the exclusion zone. In the privacy zone the IU's location is indistinguishable, while the exclusion zone guarantees the interference limit within the privacy zone. Under two variants of the system model (either known OU locations or probabilistic locations with known density), we formulate and solve corresponding optimization problems to find the optimal tradeoff of one versus the other two objectives. Simulation results with real-world maps/parameters show that the IU's privacy increases with decreasing OUs' utility given a fixed allowable interference for the IUs.

Original languageEnglish (US)
Title of host publication2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538651919
DOIs
StatePublished - Jan 11 2019
Event2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018 - Seoul, Korea, Republic of
Duration: Oct 22 2018Oct 25 2018

Publication series

Name2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018

Conference

Conference2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018
CountryKorea, Republic of
CitySeoul
Period10/22/1810/25/18

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture

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    Salama, A. M., Li, M., Lazos, L., Xiao, Y., & Krunz, M. (2019). On the Privacy and Utility Tradeoff in Database-Assisted Dynamic Spectrum Access. In 2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018 [8610485] (2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/DySPAN.2018.8610485