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

摘要： 地震灾害发生以后，原有电力系统和通讯设施不能够正常运行，使得搜救人员携带的无线通讯节点设备组成的DTN（Delay Tolerance Network）成为了搜救服务网络的重要组成部分。搜救信息是否能够第一时间传送到数据中心尤为重要，分析了震后救援特性需求，设计了地震救援系统模型，综合考虑搜救网络节点间的时间距和数据信息的权重优先级提出了一种适宜于震后救援的路由新策略，通过实验仿真验证了新策略的实用性，为我国地震震后救援提供参考。

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