基于多描述编码的WMSN传输性能

Multiple Description Coding Based Transmission Performance in Wireless Multimedia Sensor Networks

针对无线多媒体传感器网络(WMSN)数据传输存在无线链路差、传输质量要求高等问题,提出一种基于多描述编码的传输策略.该策略利用源节点进行多描述编码,通过选择初始分发节点,形成多个转发路径.以图像传输为实例,从数据到达率、图像传输前后的对比、峰值信噪比等参数对该策略进行性能验证.仿真结果表明,该传输策略能解决无线链路不稳定性带来的问题,并保证数据传输的可靠性.

A multiple description coding transmission strategy proposed to solve the problem of low wireless network connectivity but high transmission quality requirements in wireless multimedia sensor networks （WMSN）. This strategy makes multiple descriptions coding on the source node, selects initial broadcasting nodes, and then builds multiple transmission paths. The strategy is applied in image transmission application where the performance is evaluated in terms of data arrival ratio, and comparied between transmitted image, the original one, and peak signal to noise ratio. Experiment shows that the strategy improves wireless network connectivity and assures transmission reliability of WMSN.