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

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

中图分类号: 

• TP393