基于网络编码的哈希分布式卫星数据存储方法  

A distributed hash storage method of satellite data based on network coding

作　　者：张战云[1] 赵现纲[1] 林曼筠[1] 范存群[1] 谢利子[1] 金桦 国鹏[1] ZHANG Zhanyun;ZHAO Xiangang;LIN Manyun;FAN Cunqun;XIE Lizi;JIN Hua;GUO Peng(National Satellite Meteorological Centre, Beijing 100081, China;China Academy of Information and Communications Technology, Beijing 100083, China)

机构地区：[1]国家卫星气象中心,北京100081 [2]中国信息通信研究院,北京100191

出　　处：《现代电信科技》2016年第6期13-16,22,共5页Modern Science & Technology of Telecommunications

基　　金：国家863计划项目(No.2011AA12A104)

摘　　要：针对卫星数据应用对地面系统数据访问时效性要求的提高,提出一种基于网络编码的哈希分布式卫星数据存储方法。首先,通过网络编码方法对卫星数据进行分块和编码,然后引入对等哈希分布存储方法对存储设备进行哈希环和值域设置,最后根据对目标位置的哈希计算以确定数据存储和读取位置。仿真结果表明,所提方法可以较好地提高卫星数据的存储和读取效率,满足大批量卫星数据读存的及时性需求。To meet the increasing demand of satellite data applications for timely data access to satellite ground application system,this paper proposes a distributed hash storage method of satellite data based on network coding.Firstly,the network coding method for satellite data into blocks and coding,then the introduction of peer distributed hash storage method for storage devices hash ring and range settings,and finally hash target position calculated to determine the data storage and reading position.Firstly,the satellite data are segmented and coded by the network coding method.Then,the equivalent hash distribution storage method is introduced to set the Hash ring and the range of the storage device.Finally,the location of data storing and reading is determined according to the hash calculation of the target position.Simulation results show that the proposed method can improve the efficiency of storing and reading of satellite data and can meet the needs of high-volume satellite for timeliness of reading data stored.

关 键 词：卫星地面应用系统 数据存储 网络编码 哈希分布 

分 类 号：TN927[电子电信—通信与信息系统]