关键词: 救援工作, 延迟容忍网络（DTN）, 时间距, 权重, 路由新策略

Abstract: It is important for reducing the loss of disaster and property to rescue quickly after the earthquake. Because the original electric power and communication facilities can not operate at all after the disaster, the Delay Tolerance Network（DTN） composed by the wireless devices has become the most important part of rescue service network. It is particular important for the searching and rescue information to be sent at first time, this paper analyzes the features of the post earthquake, designs the model of rescue system, considering the distance of time and the weight of data, proposes a new routing strategy for post earthquake, verifies the practicability of the new strategy through simulation experiment, which provides a beneficial reference for China’s earthquake relief.

Key words: rescue, Delay Tolerance Network（DTN）, distance of time, weight of data, routing strategy