Wiretap TDMA Networks With Energy-Harvesting Rechargeable-Battery Buffered Sources
Wiretap TDMA Networks With Energy-Harvesting Rechargeable-Battery Buffered Sources
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DOI：
10.1109/access.2019.2895246
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发表时间：
2019-01
期刊：
影响因子：
3.9
通讯作者：
Ahmed El Shafie;N. Al-Dhahir;Z. Ding;T. Duong;R. Hamila
中科院分区：
文献类型：
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作者：
Ahmed El Shafie;N. Al-Dhahir;Z. Ding;T. Duong;R. Hamila
研究了具有能量收集源节点的上行无线时分多址信道的物理层安全性。我们考虑一组源节点配备有可充电电池和信息缓冲区通信保密与基站，鲍勃，在存在的被动窃听者，夏娃。假设一个能量收集可充电电池的合作干扰机，以协助源节点机密地发送他们的信息消息。我们提出了一个两级优化配方，以提高系统的安全性能。在第一个优化层次，我们提出了一个干扰方案下的能量约束在不同的节点，以减少秘密中断概率，而不依赖于窃听者的瞬时信道状态信息。在第二个优化级别，我们优化的能量包的数量在源节点和合作干扰以及时隙分配概率，以最大限度地提高安全吞吐量下的网络的队列稳定性约束和应用程序特定的安全吞吐量为每个合法的源节点。数值结果表明，我们提出的优化相对于两个重要的基准显着的性能增益。我们通过仿真验证了我们的理论研究结果，并量化了关键系统设计参数对安全性能的影响。
We investigate the physical-layer security of an uplink wireless time-division multiple-access channel with energy-harvesting source nodes. We consider a set of source nodes equipped with rechargeable batteries and information buffers communicating confidentially with a base station, Bob, in the presence of a passive eavesdropper, Eve. An energy-harvesting rechargeable-battery cooperative jammer is assumed to assist the source nodes to confidentially send their information messages. We propose a two-level optimization formulation to improve the system’s security performance. At the first optimization level, we propose a jamming scheme under energy constraints at different nodes to reduce the secrecy outage probabilities without relying on the eavesdropper’s instantaneous channel state information. At the second optimization level, we optimize the number of energy packets used at the source nodes and the cooperative jammer as well as the time-slot allocation probabilities to maximize the secure throughput under the network’s queues stability constraints and an application-specific secure throughput for each legitimate source node. The numerical results show the significant performance gains of our proposed optimization relative to two important benchmarks. We verify our theoretical findings through simulations and quantify the impact of key system design parameters on the security performance.