无线传感器网络数据健壮性传输设计

Design of Data Robust Transmission for Wireless Sensor Networks

无线传感器的网络通信机制和节点设计原理基本相同。多种无线传感器网络(WSN)处于同一个区域时,会产生同频率传输干扰。此外,传统的无线传感器网络主要考虑节点成本、体积、网络容量和电池能量等因素,忽略了同频干扰导致的网络数据传输丢包和延时增加的情况。采用乒乓方式,利用无线传感器网络空余时隙以及节点内部剩余存储空间,在不改变无线传感器网络节点硬件的基础上,提升了网络传输性能。当网络出现干扰时,利用内部存储器对无线数据进行缓存。一旦监听到网络空闲,立即将缓存的无线数据进行传输,达到了提高网络带宽利用率、降低丢包和延迟的目的。理论分析和传输试验证明,该方式在不改变硬件条件的情况下,通过状态切换的方式,避开了干扰时段的数据传输,在空闲时隙实现了数据的完整传输。该方式在工业现场监控、智能楼宇、物联网等现场环境方面,具有广阔的市场前景。

The network communication mechanisms and node designs of wireless sensor networks（ WSN） are basically the same. When a variety of wireless sensor networks are applied in the same area,the same frequency transmission interference will occurs. In addition, main considerations for traditional wireless sensor networks are to save node cost, reduce volume, improve network capacity, and save battery energy etc. , but the packet dropout and the transmission delay caused by the same frequency interference are ignored. Under ping-pong mode, the vacant time slots and the remaining internal storage space of wireless sensor network can be utilized to improve the network transmission performance without changing the node hardware. When interferences appear in network, the wireless data are cached by adopting internal storage, once the free time slots are monitored, the cached data are transmitted immediately, thus bandwidth utilization of the network is improved, the packet loss probability and transmission delay are reduced. The theoretical analysis and simulated transmission experiments show that with unchanged hardware conditions, the data transmission in interference period is avoided by the status switching mode, and the complete transmission of data is realized by using the idle time slot. This method possesses broad market prospects in the industrial field monitoring, intelligent buildings, Internet of things and other on-site environments.