基于DTN的高分卫星传感器网络性能优化研究  

Research on Performance Optimization in High-resolution Satellite Sensor Network Based on DTN

作　　者：宋蒲斌 孙贺 王兆俊[3] 程子敬[3] 王梦源[3] 

机构地区：[1]武汉大学电子信息学院,武汉430072 [2]辽源市统计局计算中心,吉林辽源136200 [3]航天恒星科技有限公司,北京100080

出　　处：《计算机工程》2016年第8期46-51,共6页Computer Engineering

基　　金：国家部委基金资助项目

摘　　要：高分卫星传感器网络的节点分布稀疏、链路通断频繁,并且传输数据量大,容易出现网络拥塞、丢包率高等问题。为此,提出一种快照集成路由方法。利用网络周期性、可预测性的特点,以及延迟容忍网络(DTN)存储、等待、转发的路由机制,将快照分割后的网络拓扑进行集成规划,并以最小化最大链路利用率为目标建立数学模型,以实现网络流量的均匀分布。实验结果表明,与联系图路由协议、基于相遇记录和传递性的概率路由协议相比,该方法能减少网络拥塞,实现流量均衡,并降低数据传输的丢包率。The distribution of nodes is sparse ;the connection and disconnection of links are frequent ; and the amount of transmission data is huge in the High-resolution Satellite Sensor Network （HRSSN）. These lead to network congestion and considerable packet loss rate. In order to solve the problems, the method of Snapshot Integration Routing （SIR） is proposed. This method integrates and plans the snapshots of network topology, based on the characteristics of periodic and predictable HRSSN as well as the routing mechanism of storage, waiting and transmission in the Delay Tolerant Network （DTN）. And,it takes minimizing the maximum link utilization rate as the object to build the mathematical model and achieve the network load balancing. Experimental results show that compared with Contact Graph Routing （CGR） and Probabilistic Routing Protocol Using History of Encounters and Transitivity （PROPHET） , the method effectively avoids network congestion, achieves load balancing, and reduces the packet loss rate in HRSSN.

关 键 词：高分卫星传感器网络 延迟容忍网络 快照集成路由 链路利用率 网络拥塞 

分 类 号：TN927[电子电信—通信与信息系统]