Attempting to better control routing strategy, most operators deploy BGP to backbone node routers.
为了更好地控制路由策略，当前大部分的营运商均将BGP部署到骨干路由器。
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.
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。
The node load is insufficient for the server selection because the multi-replica scatter at different place and the backbone is expensive.
对象的多个副本散布在网络的不同位置，网络骨干费用昂贵，不能只采用节点负载作为服务器选择的依据。
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