An Intermittent Cooperative Jamming Strategy for Securing Energy-Constrained Networks
An Intermittent Cooperative Jamming Strategy for Securing Energy-Constrained Networks
复制标题
用于保护能源受限网络的间歇性协作干扰策略
DOI：
10.1109/tcomm.2019.2937303
复制
发表时间：
2019
影响因子：
8.3
通讯作者：
邢晓双
中科院分区：
文献类型：
--
作者：
高青鹤;霍炎;荆涛;Liran Ma;温营坤;邢晓双
友好干扰是一种非常规的保密无线通信方法。具体地说，友好的干扰器向窃听者发送干扰信号，而合法的发射机正在发送数据。干扰信号只干扰窃听者，从而防止数据被泄露给非预期的一方。主流干扰方案采用连续干扰策略(CJS)，要求干扰器在合法传输的整个持续时间内不断地发送干扰信号。然而，在某些场景下，CJS可能会导致过度干扰，造成能量浪费和干扰效率下降。为了解决CJS的缺点，我们提出了间歇干扰策略(IJS)的概念，在合法的传输过程中，干扰器在干扰和非干扰模式之间交替。在本文中，我们研究了IJS在物理层安全方面的可行性。我们首先引入一种新的指标来共同衡量安全要求和能源成本。接下来，我们建立并求解了干扰持续时间比例和干扰功率的优化问题。最后，通过在不同调制方式下的大量仿真实验，验证了IJS的可行性。
Friendly jamming is an unconventional approach to secure wireless communications. Specifically, a friendly jammer transmits jamming signals to an eavesdropper while a legitimate transmitter is sending data. The jamming signals only interfere with the eavesdropper, and thus, prevent data from being disclosed to unintended parties. Mainstream jamming schemes adopt a continuous jamming strategy (CJS), where the jammer is required to constantly transmit jamming signals in the entire duration of the legitimate transmission. In certain scenarios, however, the CJS may lead to excessive jamming, and cause a waste of energy and the degradation of jamming efficiency. To address the drawbacks of the CJS, we propose the concept of an intermittent jamming strategy (IJS), where a jammer alternates between jamming and non-jamming modes during the legitimate transmission. In this paper, we study the feasibility of the IJS for physical layer security. We first introduce a new metric to jointly measure security requirements and energy costs. Next, we formulate and solve an optimization problem with respect to the jamming duration proportion and the jamming power. Finally, we verify the feasibility of the IJS through extensive simulation experiments under different modulation methods.