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物联网(Io Ts:Internet of Things)感知层通常由多个无线传感器网络(MWSNs:Multiple Wireless Sensor Networks)组成。数据查询处理是多无线传感器网络中很重要的一个研究领域。连接查询能在不同的位置监视相似的网络环境。通用连接算法中,各节点上报连接属性值给数据库服务器,由数据库服务器找出符合连接条件的匹配节点结果集。分布式连接算法中,普通节点预测自己的过滤器区间,数据库服务器获得全局过滤器区间,符合条件的普通节点上报信息给数据库服务器,数据库服务器获得最终的匹配节点结果集。在真实数据集上验证了各算法,并体现出了通用连接算法和分布式连接算法的优越性。
Io Ts: Internet of Things The perceptual layer usually consists of multiple wireless sensor networks (MWSNs). Data query processing is an important research field in multi-sensor networks. Connection queries can monitor similar network environments in different locations. In the common connection algorithm, each node reports the connection attribute value to the database server, and the database server finds the matching node result set that meets the connection condition. In the distributed connection algorithm, an ordinary node predicts its own filter interval. The database server obtains the global filter interval. The qualified normal node reports the information to the database server, and the database server obtains the final matching node result set. The algorithms are validated on real datasets and show the superiority of universal connectivity algorithms and distributed connectivity algorithms.