支持无线传感器网络的实时查询技术研究

无线传感器网络集感知、通信、计算功能于一体，在诸多领域有重要应用，因而已经成为计算机领域研究的热点。目前的研究大都主要以节约能源消耗为目标，提出不同的查询处理策略。本文从提高查询速度，满足用户对查询响应时间的约束的角度，设计了一个支持实时查询的无线传感器网络系统；给出了系统中的关键技术，包括数据模型、查询语言模型、路由策略、查询处理及优化策略，以及双向递交机制。

Study on Real-time Query Techniques for Wireless Sensor Networks

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.