水声信道容延容断网络系统设计与实现

Design and implementation of underwater acoustic channel delay/disruption tolerant network system

水声通信传感器网络是实现海洋环境监测的重要手段,但由于水声信道存在长时延、易中断特性,为传感器网络的设计和应用带来巨大挑战。设计了一个容延容断网络系统用于实现监测节点间的通信及组网功能。针对监测数据的不定时传输需求,设计的同步方式可准确实现数据帧检测;针对水声信道特点,对网络体系各层级进行设计与实现以适用于水下环境。实验结果表明,系统在1 km处误码率低于10^(-3)并能够实现网络自组织,可应用于实际水下监测环境中。

Underwater Acoustic Sensors Networks(UASNs)are important means to monitor the marine environment.The high propagation delay and intermittent connectivity of the acoustic channel make the UASNs design challengeable.A delay/disruption tolerant network system is designed to implement communication and networking among monitoring nodes. Considering the irregular transmission requirement of monitoring data, a synchronization method which can accurately detect the data frame has been designed. Aiming at the characteristics of acoustic channel, a network system has been designed and implemented to adapt to underwater environment. The experimental results demonstrate that the system realizes self-organizing network and the bit error rate at 1 km distance is lower than 10-3 .