标题： 感知和阻止干扰的次级用户：高效频谱共享系统的验证 显示英文标题

标题： Sensing and Stopping Interfering Secondary Users: Validation of an Efficient Spectrum Sharing System

摘要： 我们提出了可停止的二次使用（StopSec）协议的设计和验证，这是一个具有识别造成干扰的次级用户（SU）能力的隐私保护协议，并能迅速停止干扰。 所有用户都由一个数据库提供服务，该数据库从主用户（PU）向干扰的次级用户（SU）提供反馈机制。 我们引入了一种新的轻量且鲁棒的方法来对SU的OFDM数据包进行水印标记。 通过大量的空中实时实验，我们从干扰检测、识别和停止延迟以及对SU的影响等方面评估了StopSec。 我们证明了水印方法不会对次级数据链路产生负面影响，并且对现实世界的时间变化信道具有鲁棒性。 干扰的SU可以在150毫秒内被停止，当多个用户同时干扰时，它们都可以被停止。 即使干扰比噪声功率低10 dB，StopSec也能在SU出现在信道中的几秒钟内成功停止干扰的SU。 StopSec可以作为一种有效的频谱共享协议，适用于必须快速自动停止对PU的干扰的情况。 显示英文摘要

摘要： We present the design and validation of Stoppable Secondary Use (StopSec), a privacy-preserving protocol with the capability to identify a secondary user (SU) causing interference to a primary user (PU) and to act quickly to stop the interference. All users are served by a database that provides a feedback mechanism from a PU to an interfering SU. We introduce a new lightweight and robust method to watermark an SU's OFDM packet. Through extensive over-the-air real-time experiments, we evaluate StopSec in terms of interference detection, identification, and stopping latency, as well as impact on SUs. We show that the watermarking method avoids negative impact to the secondary data link and is robust to real-world time-varying channels. Interfering SUs can be stopped in under 150 milliseconds, and when multiple users are simultaneously interfering, they can all be stopped. Even when the interference is 10 dB lower than the noise power, StopSec successfully stops interfering SUs within a few seconds of their appearance in the channel. StopSec can be an effective spectrum sharing protocol for cases when interference to a PU must be quickly and automatically stopped.