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一种分散式空间服务网络模型
引用本文:左怀玉,景宁,唐宇,赵亮.一种分散式空间服务网络模型[J].系统工程与电子技术,2009,31(6):1480-1484.
作者姓名:左怀玉  景宁  唐宇  赵亮
作者单位:国防科技大学电子科学与工程学院, 湖南, 长沙, 410073
基金项目:国家高技术研究发展计划(863计划),国家自然科学基金 
摘    要:提出分散式空间服务网络模型来克服空间服务宿主服务器间的"孤岛"状态以及网络的伸缩性障碍。以Super Geo-Peer、Basic Geo-Peer和Inferior Geo-Peer分别建模不同能力的空间服务宿主服务器和空间服务消费者。在分散式空间服务网络模型的服务发现过程中,建立关于Super Geo-Peer和Basic Geo-Peer间比率的系统代价模型,并推导出满足最小系统代价的最佳比率。在此基础上,给出了一种维护分散式空间服务网络系统的可选方案。

关 键 词:P2P网络  空间服务  面向服务架构  分散式网络
收稿时间:2008-04-23

Decentralized network model for geospatial services
ZUO Huai-yu,JING Ning,TANG Yu,ZHAO Liang.Decentralized network model for geospatial services[J].System Engineering and Electronics,2009,31(6):1480-1484.
Authors:ZUO Huai-yu  JING Ning  TANG Yu  ZHAO Liang
Institution:Coll. of Electronic Science and Engineering, National Univ.of Defense Technology, Changsha 410073, China
Abstract:Geospatial service servers over traditional networks such as "Client/Server" can not collaborate with each other just like some isolated islands.As the number of geospatial servers increases,the scalability of "Client/Server" networks also proves to be a major hurdle.A decentralized network based on P2P to conquer those barriers is presented.In the proposed model,super geo-peer,basic geo-peer and inferior geo-peer are used to express super geospatial service server,normal geospatial service server and geospatial service consumer respectively.A system cost model,which is the function of the size ratio between super geo-peers and basic geo-peers,is presented to get an appropriate optimal size ratio and makes the system’s search performance optimal.Based on the above work,an optional management algorithm is also proposed to construct a decentralized network system.
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