基于虚拟骨干网的概念，研究传感器网络中虚拟骨干网的节点即关键点的选取问题。
Based on the concept of virtual backbone networks, this paper researches the problem of selecting nodes of virtual backbone networks, which is named Key node in this paper, in Sensor networks.
介绍了目前几种常用的虚拟骨干网设计方案，并从算法的复杂度和所需的邻居信息等方面对其进行比较。
A few of main design schemes of virtual backbone are presented, and are compared and analyzed from arithmetic complexity and neighbor information etc.
技术上说，VPN是指将物理上分布在不同地点的网络，通过公用骨干网连接而形成的逻辑上的虚拟子网。
In technology, VPN means the networks locating in the different places are connected by main public networks, which shape the logic networks.
技术上说，VPN是指将物理上分布在不同地点的网络，通过公用骨干网连接而形成的逻辑上的虚拟子网。
In technology, VPN means the networks locating in the different places are connected by main public networks, which shape the logic networks.
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