智能空间位置感知的伺候式服务模型  

Proactive location-awareness service model for smart space

作　　者：谷红亮[1] 史元春[1] 徐光[1] 

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《清华大学学报（自然科学版）》2006年第4期584-587,共4页Journal of Tsinghua University(Science and Technology)

基　　金：新世纪优秀人才支持计划(NCET-04-0079)

摘　　要：智能空间中,位置感知应用不仅需要位置相关的快速查询服务,而且需要伺候式的空间事件服务。然而传统的空间数据库系统难以有效地满足以上两种需要。为此提出了一种轻量级的伺候式空间服务模型P roSerM od i。该模型采用了在复合空间索引基础上的双服务处理机制技术,不仅使空间事件服务的通知质量从传统模型的I/2降低到零延时,而且使与位置相关的查询处理的复杂度从传统模型的O(n)降低到O(logkn)。综合性能分析表明该模型在提供位置感知服务上比传统模型更有效。In smart space, location-aware applications not only need rapid location-related query service, but also require proaetive spatial event service. However, traditional spatial database systems can not efficiently satisfy both req ProSerModl, uirements. A light-weighted proactive spatial service model,was developed with a dual-service processing mechanism based on a composite spatial index. With this design, the NQoS of the spatial event service is reduced from I/2 in traditional models to near-zero delay, while the process complexity on location-related query is reduced from O（n） in traditional models to O（logkn）. An overall performance analysis shows that the system provides more efficient location-awareness service than traditiofial models.

关 键 词：个人计算机 普适计算 位置感知 智能空间 空间服务模型 

分 类 号：TP368.3[自动化与计算机技术—计算机系统结构]