论文标题
通过无线临时网络通过移动性辅助秘密通信
Mobility-Assisted Covert Communication over Wireless Ad Hoc Networks
论文作者
论文摘要
我们研究了节点迁移率对无线ADHOC网络秘密通信吞吐量缩放的影响。假定$ n $移动节点希望在单位磁盘中相互通信，同时将通信秘密的存在与$θ（n^s）$ noncolluding Wardens（$ s> 0 $）保持在一起。我们的结果表明，与固定节点位置相比，节点迁移率大大改善了吞吐量缩放。特别是，如果$ 0 <s <1 $，当每个监狱长用来判断通信的存在的频道数量与$ n $相比，总吞吐量缩放量表在$ n $中是线性的。为了获得可实现的性，我们通过在每个看守周围引入一个不允许传输和仔细分析掩护性限制对传输速度的效果的无线保护区域，通过引入每个看守周围的保存区域来修改Grossglauser和Tse（2002）的基于两跳的计划，该方案是针对无线临时网络提出的。在假设WARDENS周围的每个节点外部区域都使用相同的发射功率的假设下，该方案显示为$ 0 <s <1 $是最佳的。
We study the effect of node mobility on the throughput scaling of the covert communication over a wireless adhoc network. It is assumed that $n$ mobile nodes want to communicate each other in a unit disk while keeping the presence of the communication secret from each of $Θ(n^s)$ non-colluding wardens ($s>0$). Our results show that the node mobility greatly improves the throughput scaling, compared to the case of fixed node location. In particular, for $0<s<1$, the aggregate throughput scaling is shown to be linear in $n$ when the number of channel uses that each warden uses to judge the presence of communication is not too large compared to $n$. For the achievability, we modify the two-hop based scheme by Grossglauser and Tse (2002), which was proposed for a wireless ad hoc network without a covertness constraint, by introducing a preservation region around each warden in which the senders are not allowed to transmit and by carefully analyzing the effect of covertness constraint on the transmit power and the resultant transmission rates. This scheme is shown to be optimal for $0<s<1$ under an assumption that each node outside preservation regions around wardens uses the same transmit power.
