Study on Real-time Query Techniques for Wireless Sensor Networks
支持无线传感器网络的实时查询技术研究

Wireless sensor networks, with their primary functions as sensing, communication and computing, are applied in many kinds of fields. They have actually become a real hot topic in the computer science research. At present, most researchers are emphasizing on how to reduce the power consumption,and up to now many query strategies have been brought out. In this paper, we try to solve this problem from the angles of both query acceleration and response time limit presented by the user. Firstly we analyzed the whole problem and the requirements, and then proposed a wireless sensor network system supporting real-time query. There are also some new key techniques for the system here, such as data model, query language model, routing policy, query processing, optimization strategy, and bidirectional delivery mechanism.