一种基于P2P网络结构的遥感空间数据共享方案  

A remote sensing spatial data sharing scheme based on P2P network

作　　者：宋奇[1,2] 王栋[2] 赵亚萌[2] 臧文乾[2] 杜佳恒 

机构地区：[1]河南大学计算机与信息工程学院,河南开封475004 [2]中国科学院遥感与数字地球研究所

出　　处：《计算机时代》2016年第7期20-23,共4页Computer Era

基　　金：高分重大专项项目"基础信息产品生产算法集成研究"(Y4D0100038);高分重大专项项目"地球表层系统科学研究应用示范系统"(Y4D00100GF);中科院战略先导专项项目"气溶胶关联的云参数卫星遥感"(Y1Y02230XD)

摘　　要：随着中国卫星遥感技术的发展,遥感空间数据的数量与体积急剧增长,同时由于数据分发中心带宽有限,造成了遥感空间数据共享效率低的问题。为此设计了一种基于P2P网络结构的遥感空间数据共享方案。该方案结合集中式目录服务与文件分块传输思想,提出数据共享模型与任务队列分配模型,实现同时从多个资源节点获取数据的功能。实验结果表明,该方案提高了数据共享效率,有效缓解了服务器网络负载,在遥感数据共享领域具有借鉴意义。With the development of the satellite remote sensing technology in China, the amount and the size of remote sensing spatial data increase sharply. At the same time, due to the limited bandwidth of the data distribution center, the efficiency of remote sensing spatial data sharing is not high enough. In order to solve this problem, this paper designs a remote sensing spatial data sharing scheme based on P2P network. The scheme combines centralized directory service and the idea of block file transmission, and puts forward a data sharing model and a task queue assignment model which implements the ability of getting data from multiple source peer nodes. The experimental results show that this scheme not only improves the data sharing efficiency, but also alleviates network load of the servers, and has reference significance in the field of remote sensing data sharing.

关 键 词：遥感空间数据 集中式目录服务 分块传输 P2P 任务队列分配 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]