节点预约方式的水声通信网MAC协议设计

针对广泛应用于水声通信网的MACAW( medium access with collision auoidance for wircless)协议在多跳通信延时严重的问题,在传统握手协议的基础上,提出了节点预约的方法.该方法通过多跳转发的握手信号CTS预约处于通信链路上的下级节点,并通过复用上级节点的握手信号CTS( clear to send)及数据信号DATA,形成一种流水线式的传输协议.仿真结果表明:在多跳网络通信中,该协议与传统的MACAW相比,在能耗变化较小的情况下,时延性能有较大幅度的提高,适用于移动节点通信、灾难预警、战时侦测等需要快速反应的水声通信应用场景.

A node reservation MAC protocol for an underwater acoustic network

In order to solve the serious latency problem of traditional MACAW(medium access with collision auoidance for wireless) protocol which has been widely used in multi-hop underwater acoustic networks,a node reservation protocol which was developed from the idea of handshaking protocols was introduced.In this protocol,latter nodes on the communication link were reserved by CTS(clear to send) which is retransmitted by intermediate nodes.At the same time,CTS and DATA of previous nodes were reused to form the pipelining transmission.Simulation results show that network latency in this protocol is increased significantly compared to traditional MACAW,while energy consumption does not noticeably rise.Therefore,the protocol will be applicable in quick reaction application in underwater circumstances,such as mobile communication,disaster warning,and battlefield surveillance.