基于事件优先级的地理哈希表分发算法

摘要

无线传感器网络综合了传感器技术,分布式信息处理技术和无线通信技术,能够协作地实时监测、感知和采集各种信息并对其进行处理,进而传给目标用户,能量和效率是传感器网络最重要的考虑因素。GHT-DCS是一种能量高效且在查询时延和存取能效上取得较好平衡的一种数据分发方式。然而,该算法主要集中在降低能量消耗,很少综合考虑查询时延,网络负载均衡,能量消耗这三个方面。针对多优先级的事件查询,在改进GHT-DCS的条件下,该文提出了基于事件优先级的地理哈希表的分发算法GP-GHT,通过划分扇形区域存储,节省存储能耗;通过定义优先级,使得高优先级的事件离查询节点更近,能更快地被搜索到。该算法降低了能源消耗,缩短查询时延,可满足不同优先级事件时延的需求。%Wireless sensor networks are integration of sensor techniques,distributed information processing technology and wireless communication technology,can be used for monitoring,sensing and collecting all kinds of information and its treatment,to target users.Energy and efficiency of sensor networks is one of the most important considerations.GHT-DCS is a kind of energy efficiency and energy efficiency in delay and access to better balance with a data distribution method.However,the algorithm was mainly focused on lowering energy consumption,rarely considering delay,network load balancing,energy consumption of these three aspects.Multi priority event query,the improved GHT-DCS conditions,this article proposed based on priority geographic hash table distributed algorithm GP-GHT.The algorithm reduces the energy consumption,reduce the query time delay,which can satisfy different priority event of delay demand.