中文摘要：

针对DTN网络中传统的路由协议未考虑到节点以及节点之间相遇时的一些属性特点问题,提出一种基于节点质量度的Spray and Focus路由改进算法,该算法包括两个阶段：基于节点质量度的Spray阶段和Wait阶段.在前一阶段,算法根据这些属性值确定节点之间的质量度,并根据节点的质量度进行中继节点的选择以及将消息发送给质量度高的中继节点.仿真结果表明,该算法能够提高消息投递成功率并降低网络的资源消耗.

英文摘要：

According to the DTN （Delay Tolerant Network, DTN）, traditional routing protocols do not consider the properties of encounter between the node, and a modified algorithm of Spray and Focus is proposed based on these and the quality degree of node. The algorithm includes two stages, based on quality degree of node Spray stage and wait stage. In the first stage, algorithm according to the attribute value to determine the quality degree of the node, select the relay node based on it and send a message to the relay node which has the higher quality degree. The simulation results show that, the algorithm can improve the message delivery rate and reduce the network resource consumption.