一种高效的水下传感器网络MAC协议

A high efficient MAC protocol for underwater sensor networks

水声信道具有窄带宽、高传播延时等特点,为有效减少水声信道冲突,信道预约型MAC协议成为水下传感器网络的首要选择。通过分析信道预约型MAC协议节点在高负载网络条件下的RTS-CTS控制包的交换过程,给出了多个节点对同时取得信道使用权成立条件,设计了一种在一次RTS-CTS握手后,拥有信道使用权的多个节点对依次进行无碰撞数据传输的MAC协议。最后通过仿真实验验证协议的性能,结果表明:该协议具有更高的网络吞吐量和更低的网络时延。

Underwater acoustic channel is characterized with narrow band width and long propagation delay, to reduce channel conflict effectively, MAC protocol with channel reservation mechanism becomes the optimum choice for underwater sensor networks. Through analyzing process of exchange of RTS-CTS control packets based on node of MAC protocol with channel reservation mechanism in high loading network conditions under which multiple node pairs can get right to use channel at the same time;design a MAC protocol under which many node pairs can realize data transmissions in sequence without collision after a RTS-CTS handshaking. Finally, performance of protocol is verified through simulation, result shows that this protocol has higher throughput and lower network delay.