中文摘要：

延迟容忍网络中，基于历史消息转发路由协议可根据节点的历史统计信息对下一跳节点进行预测估计，以此判断转发和存储信息的最佳时机，避免信息盲目转发．为此，针对典型spray and focus协议选择中间节点的旨目性，将“分离时间”和“副本控制”运用于路由选择、缓存管理和组播方式中，可较好地节约资源，并提高通信效率．仿真结果表明，改进后的协议有效地提高了网络交付率，减小了端到端的时延．

英文摘要：

Delay tolerant network routing protocol is analyzed based on historical information forwarding, according to the history of statistics forecast estimates on the next hop node, forwarding and storaging information to judge the best time. It avoids blindly forwarding information. The typical spray and focus protocol choice blindness among nodes, the ＂ separation time＂ and ＂copy control＂ is applied to routing buffer management and multicast mode. It does good to conservation of resources and improves communication efficiency. Simulations show that the improved protocols effectively improve delivery ratio and shorten the message delivery delay.