Secure Communication in Two-Hop Buffer-Aided Networks with Limited Packet Lifetime
Secure Communication in Two-Hop Buffer-Aided Networks with Limited Packet Lifetime
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DOI：
10.1109/nana.2019.00027
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
Xuening Liao;Yuanyu Zhang;Bo Liu;Zhenqiang Wu
中科院分区：
文献类型：
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作者：
Xuening Liao;Yuanyu Zhang;Bo Liu;Zhenqiang Wu
研究了在两跳无线网络中实现物理层安全的缓冲区辅助中继选择问题。现有的工作只关注于具有无限数据包生命周期的网络。然而，更实际的具有有限数据包生存期的场景在很大程度上被忽略了。在本文中，我们考虑了一个两跳无线系统，其中通过网络传输的每个分组都有有限的生命周期。我们首次提出了一种新的基于缓存辅助的中继选择方案，该方案根据中继缓存中分组的生存时间来选择最佳的中继。然后分析了网络的保密中断概率(SOP)和期望排队时延。最后，我们提供了大量的数值结果来研究SOP和时滞性能。结果表明，SOP随着最大包寿命的增加而减小，而平均排队时延随着最大包寿命的增加而增大。
This paper investigates the buffer-aided relay selection for achieving physical layer security (PLS) in two-hop wireless networks. Available works only focus on networks with infinite packet lifetime. However, the more practical scenario with limited packet lifetime are largely ignored. We consider in this paper a two-hop wireless system where every packet transmitted over the network has a limited lifetime. We first proposed a novel buffer-aided relay selection scheme to select the best relay based on lifetime of packets in the relay buffer. We then analyze the secrecy outage probability (SOP) and the expected queuing delay of the network. Finally, we provide extensive numerical results to investigate the SOP and delay performances. The results showed that the SOP decreases as the maximum packet lifetime increases, while the average queuing delay increases as the maximum packet lifetime increases.