摘要
针对DTN网络的核心机制-路由算法,分析了目前DTN路由算法的主要技术及其特点,包括队列管理、复制机制和转发机制。并且根据DTN网络的特点,采用了几种路由算法进行仿真。通过仿真表明,这几种路由算法都具有较高的消息投递成功率,但开销较大,消息的无限复制会大大地占用节点的缓存空间。因此平衡DTN网络中的开销与投递率还是一个设计的难点,需要根据实际网络参数做出适当的折中。仿真结果表明,DTN路由不能直接应用于机动通信网,但是一些设计思想可以借鉴。
The circumstance of the mobile communication network is usually very severe, and interplanetary internet, sensor network, temporary network for disasters and sudden emergencies are considered as mobile communication network.These networks have such characteristics as large delay,intermittent link loss,low data rate,etc.The traditional IP protocol stack does not work well in these networks.To address these issues, Delay Tolerant Network（DTN） has been proposed.The Bundle layer in the DTN can mitigate these issues.Furthermore, appropriate routing protocols can improve the communication quality in the network. In this paper, some popular routing protocols are classified in terms of queue management, message replication and forwarding mechanism.These routing protocols have been simulated,with the key performance metrics and characteristics of the DTN.Finally, the simulation results show that DTN routing mechanism can＇t be applied directly in mobile tactical network, but some ideas could be referred.
出处
《无线电通信技术》
2015年第5期15-18,共4页
Radio Communications Technology
