提出一种基于无线传感器网络架构的地下停车场诱导信息系统—UPIS. 系统利用超声检测技术检测车位状态,并采用无线传感器网络叠加移动3G网络的无线通信架构进行数据传输. 针对地下停车场快速变化的无线信道环境,提出基于TDMA调度的无线通信协议CMesh,用以提高地下停车场内无线传感器网络系统的生存周期,并且提供可靠的无线数据传输. 描述系统的整体架构,并对CMesh的能量感知路由与TDMA调度机制进行介绍与分析. 通过原型系统实验与实际环境部署,评估了系统的丢包率与能量开销. 实验结果表明,系统的性能能够满足应用的需求.
Underground parking information system(UPIS), which integrates wireless sensor network(WSN) technology, is proposed. Ultrasound sensors are used to monitor states of parking spaces. Data transmission system is an integration of WSN and mobile 3G network. In addition, CMesh, a wireless communication protocol based on TDMA, is proposed to accommodate the volatile wireless channels, increase the reliability of wireless communication, and prolong the lifetime of WSN in UPIS. The overall system framework, energy-aware routing, and TDMA scheduling of UPIS are presented and analyzed. Through the prototype experiment and actual implementation, we evaluate packet loss rate and energy consumption of the WSN system, which show that the system satisfies the requirements of application.
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