智能空间位置感知的伺候式服务模型

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。

Proactive location-awareness service model for smart space

In smart space,location-aware applications not only need rapid location-related query service,but also require proactive spatial event service.However,traditional spatial database systems can not efficiently satisfy both requirements. A light-weighted proactive spatial service model,ProSerModi,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(log_k n).An overall performance analysis shows that the system provides more efficient location-awareness service than traditional models.