Technology of Mobile Querying Based on Message Prefetch for Wireless Sensor Networks
无线传感器网络中基于消息预取的移动查询技术

A data query processing scheme called "Mobile-Query" was developed as well as its system architecture and query model. The scheme was made of proxy nodes and network nodes. Just in time mechanism was adopted to transmit prefetching message to sensor nodes for initializing query tree and re-scheduling nodes-sleep periods before user reaching, therefore, query result could be sent back to user before the end of query period. The theoretical analysis and simulation based on NS-2 show that this scheme has good data integrity and high data service quality, and it costs 24% energy more than that of PSM scheme in IEEE802.11.