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.

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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.

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提出了一种基于虚拟骨干网技术的移动IP方案，它结合虚拟骨干网技术和移动IP的优势，具有易实现性和较好的性能。

This paper proposes a virtual backbone -based mobile IP scheme, which combined the merits both of virtual backbone and mobile IP. Its realization is very easy while it can obtain good performance.

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