基于接收端信号的水声网络MAC协议

Receiver signal based protocol for underwater acoustic networks

水声网络的信道具有数据速率低以及传播时延长的特点,如果采用握手机制减少数据冲突,将降低信道利用率和网络的吞吐量。提出了一种基于接收节点发送短信号告知邻居节点其接收状态的水声网络MAC协议,即当接收节点接收数据时,向邻居节点发送短信号通知其当前时刻不要发送数据,解决了隐藏终端和暴露终端的问题,并提高了网络吞吐量;除此之外,使用短信号还能够降低能量损耗。仿真结果表明该协议能够实现上述目的。

The channel of underwater acoustic networks is characterized as low data rate and long propagation delay. Using the handshaking mechanism could reduce the data conflict,it will lower the channel utilization and network throughput. Thus in this paper,we propose a receiver sending short signal based protocol abbreviated to RSSP for underwater acoustic networks. In this protocol,the receiver notifies its neighbors to stop sending by sending a short signal when the receiver receiving data,which can alleviate the hidden terminal and exposed terminal problems to improve throughput. In addition,the RSSP uses a short signal can also reduce energy consumption. The simulation results show that the proposed protocol can acquire above targets.