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Research on a Fast Remote Sensing Data Transmission Policy

GE Qiang 1,CHEN Qiancheng 1,2,ZHOU Ke 1,2,ZANG Wenqian 2,YAN Yunguang 1,2,FANG Xin 1,2   

  1. (1.Institute of Data and Knowledge Engineering,Henan University,Kaifeng,Henan 475004,China; 2.Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100101,China)
  • Received:2015-09-06 Online:2016-06-15 Published:2016-06-15

一种遥感数据快速传输策略研究

葛强1,陈前程1,2,周珂1,2,臧文乾2,严运广1,2,方鑫1,2   

  1. (1.河南大学 数据与知识工程研究所,河南 开封 475004; 2.中国科学院 遥感与数字地球研究所,北京 100101)
  • 作者简介:葛强(1977-),男,副教授、博士,主研方向为空间信息处理、自动推理;陈前程,硕士;周珂(通讯作者),讲师、博士;臧文乾,助理研究员、博士;严运广、方鑫,硕士。
  • 基金资助:
    国家科技重大专项基金资助项目(Y4D00100GF,Y4D0100038);河南省科技攻关计划基金资助项目(142102210397);中科院战略性先导专项基金资助项目(Y1Y02230XD)。

Abstract: The remote sensing data in the traditional client/server mode causes heavy server load and has slow transmission.To solve this problem, this paper presents a fast remote sensing data transmission poliy. It dynamically adjusts the number of download tasks according to the download rate change. It selects the appropriate node to provide users with resource download service by retrieving the client resource of access network, thus improving the user’s download speed. Experimental results show that the policy can improve the rate of acquiring remote sensing data and the user’s download experience. Especially in the case of large number of concurrent download, it can better meet the speed requirements for remote sensing data transmission.

Key words: remote sensing data, transmission policy, MD5 value, parallel download, Peer to Peer(P2P) network

摘要: 针对遥感数据在传统C/S模式下服务器负载重、传输速度慢的问题,提出一种快速的遥感数据传输策略。根据数据连接的下载速率变化,动态调整连接任务量,通过检索接入下载网络的客户机资源,选择合适的节点为用户提供资源下载服务,提高用户下载速率。实验结果表明,该策略能提高用户获取遥感影像数据的速率,有效改善用户的下载体验,尤其在下载并发数较多的情况下,能较好地满足用户对遥感数据分发速度的要求。

关键词: 遥感数据, 传输策略, MD5值, 并行下载, 对等网络

CLC Number: