CAREER: Secure Database-Driven Dynamic Spectrum Sharing

数据库驱动的动态频谱共享（DSS）是美国联邦通信委员会（FCC）批准的增加无线频谱接入的关键使能技术范式。在这样的系统中，地理位置数据库管理员（DBA）接受主用户的注册并确定频谱的可用性，而辅助用户在使用任何感兴趣的频谱之前都需要向DBA查询频谱的可用性。提高数据库驱动DSS系统频谱估计精度的有效方法是在战略位置部署少量专用频谱传感器，并将大部分频谱感知任务外包给无处不在的移动用户。考虑到越来越强大的移动设备广泛渗透到日常生活中，以及未来移动通信系统中可预见的DSS的流行，这种方法不仅高度可行，而且预计比部署专用分布式频谱传感器的大规模网络更具成本效益。该项目旨在研究与数据库驱动的DSS系统相关的几个基本安全和隐私挑战，这些系统配备了频谱传感外包。具体来说，该项目有四个主要重点：(1)在存在虚假频谱测量的情况下构建安全的无线电环境地图；(2)激励兼容和差异化私有的众包频谱感知机制；(3)频谱误用检测的物理层二次用户认证技术；(4)通过测量活动、仿真研究、原型设计和实验相结合的方法进行性能评估。该项目将积极将研究成果引入到本科和研究生课程的开发中，让本科生和代表性不足的学生参与研究，并包括向K-12、代表性不足的学生和海外学生以及当地军事社区的推广活动。

Database-driven dynamic spectrum sharing (DSS) is a key enabling technical paradigm approved by FCC for increasing wireless spectrum access. In such a system, a geo-location database administrator (DBA) accepts registrations from primary users and determines spectrum availability, and secondary users are all required to inquire the DBA about the availability of any interested spectrum before using it. An effective approach to improve the spectrum-estimation accuracy in database-driven DSS systems is to deploy a small number of dedicated spectrum sensors at strategic locations and outsource most spectrum-sensing tasks to ubiquitous mobile users. This approach is not only highly feasible given the wide penetration of increasingly powerful mobile devices into everyday life and the foreseeable prevalence of DSS in future mobile communication systems, but also expected to be much more cost-effective than deploying a large-scale network of dedicated distributed spectrum sensors. This project is to investigate several fundamental security and privacy challenges associated with database-driven DSS systems armed with spectrum-sensing outsourcing. Specifically, there are four main thrusts in this project: (1) secure radio environment map construction in the presence of false spectrum measurements; (2) incentive-compatible and differentially-private mechanisms for crowdsourced spectrum sensing; (3) physical-layer secondary user authentication techniques for spectrum misuse detection; and (4) performance evaluation through a combination of measurement campaign, simulation study, prototyping, and experimentation. The project will actively channel the research results into development of undergraduate and graduate curricula, engage undergraduate and under-represented students into research, and include outreach activities to K-12, underrepresented, and oversea students as well as the local military community.