基于对等计算的分布式时空索引模型建立与整体框架研究

摘要

This paper creatively proposed P2P-based spatio-temporal index. It studied how to model this problem and how to build whole framework. And the model and framework covered historical index and future index. The model was based on space division, and described space partition, service node and spatio-temporal objects. The whole framework was two-tier structure, and was able to support new request under distributed environment. It consisted of querying, building and maintaining protocals. And then used 3 cases to show valid of the model. Finally, it studied the performance of the whole framework on the system developed by authors. The results show the frame is able to fullfil the access demond in distributed environment.%提出了采用P2P技术建立分布式时空索引,从这一理论的基础出发,研究对等环境下分布式时空对象模型和索引的整体框架.模型和架构涵盖了面向历史的索引和面向将来预测的索引技术.模型以空间划分作为时空数据分片的依据,描述了划分的空间、服务器节点以及时空对象之间的关系；整体架构是一种双层结构,满足分布式环境下索引的新需求,架构包含索引查询、建立和维护的基本协议.以三种应用情景为例研究模型的应用范围,最后在自行开发的系统上验证所提出的整体框架的性能.实验表明,所提出的整体框架能够满足分布式环境下对时空数据的存取要求.