YouSense：分布式协作频谱感知中熵自私的缓解
YouSense: Mitigating Entropy Selfishness in Distributed Collaborative Spectrum Sensing
摘要：
协作频谱感知是一种利用次用户空间分集来提高感知性能的有效方法。在这项研究中，一个新的自私的问题被确定，自私的用户感知没有频谱的协作感知。为了更简单的表达，它被表示为熵自私。这种自私的行为很难区分，使得现有的基于检测的激励方案无法工作。为了阻止分布式协作感知中的熵自私，我们提出了YouSense，一个一次性的Pad（OTP）为基础的激励设计，可以自然地隔离熵自私的用户从诚实的用户没有自私的节点检测。YouSense的基本思想是通过结合原始报告和随机密钥为每个感知报告构建陷门一次性密码本。这种基于一次性密码本的加密可以防止熵自私用户访问原始感测报告，同时使得诚实用户能够恢复报告。与传统的基于密码学的OTP需要密钥传递不同，YouSense允许诚实的用户通过利用协作感知的独特特性来恢复密码本（或密钥），即不同的次级用户在相同的无线电频谱上共享一些共同的观察结果。我们进一步扩展YouSense，通过减少可能焊盘集合的基数来提高恢复成功率。通过大量基于USRP的实验，我们表明YouSense可以成功地以较低的系统开销阻止熵自私。
英文摘要：
Collaborative spectrum sensing has been recognized as a promising approach to improve the sensing performance via exploiting the spatial diversity of the secondary users. In this study, a new selfishness issue is identified, that selfish users sense no spectrum in collaborative sensing. For easier presentation, it's denoted as entropy selfishness. This selfish behavior is difficult to distinguish, making existing detection based incentive schemes fail to work. To thwart entropy selfishness in distributed collaborative sensing, we propose YouSense, a One-Time Pad (OTP) based incentive design that could naturally isolate entropy selfish users from the honest users without selfish node detection. The basic idea of YouSense is to construct a trapdoor one-time pad for each sensing report by combining the original report and a random key. Such a one-time pad based encryption could prevent entropy selfish users from accessing the original sensing report while enabling the honest users to recover the report. Different from traditional cryptography based OTP which requires the key delivery, YouSense allows an honest user to recover the pad (or key) by exploiting a unique characteristic of collaborative sensing that different secondary users share some common observations on the same radio spectrum. We further extend YouSense to improve the recovery successful rate by reducing the cardinality of set of the possible pads. By extensive USRP based experiments, we show that YouSense can successfully thwart entropy selfishness with low system overhead.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
