The DMAP ( Distributed Monitoring Application Platform ) is introduced, and in order to realize the DMAP, CDM ( Common Device Model(CDM) ) is proposed as a universal model for the devices and field-buses for implementing the device integration of the DMAP. 提出通用设备模型(CommonDeviceModel)作为设备和现场总线的统一模型,以实现分布式监控应用平台的设备集成。
The most common method is to use signal propagation model to estimate the distance, as the transceiver is the only available ranging device for most of the common sensor nodes, and the model usually is isotropic. 目前最常见的测距方法是利用节点配备的无线电收发器,通过接收到的信号强度并利用信号的传播模型来估计距离,这个模型假定无线电信号的传输是各向同性的。