传感器网络有线接入信息传输性能分析

Performance analysis of sensors transmitting data with wired access scheme

针对预警系统中广域部署在偏远地区的传感器,需利用现有话音通信线路传输感知信息的情况,分析预警系统中传感器网信息传输性能.阐述传感器完成一个电路交换呼叫过程的ISUP信令消息流程和时延,给出传感器网络信息接收设备通信端口数量的设计模型;采用计算机模拟传感器网络进行实验测试,得到数据信息的相继到达间隔时间分布.基于Erlang B公式计算信息接收设备需配置的端口数量与相应的数据丢失率,为开发信息接收设备以及评估传感器网络信息传输的可靠性提供依据.

The data transmission performance by speech channel was analyzed for sensors distributed in remote and wild regions. The ISUP signalling message flow and overall signaling delay were illustrated for a sensor completing a circuit-switched connection procedure. The queuing model used to estimate the number of communication ports in the receiving equipment was presented. The distribution of data inter-arrival time was derived from computer simulation of sensor networks. The number of communication ports and the corresponding data loss rates are calculated based on Erlang B formula, which can provide a theoretical foundation for developing the receiving equipment and evaluating the reliability of the sensor networks.