一种基于有限状态机的新型水声网络多址接入协议的实现  

The implementation based the finite state machine of a novel multiple access protocol for underwater acoustic networks

作　　者：高明生[1] 陆佶人[1] 

机构地区：[1]东南大学无线电工程系,江苏南京210096

出　　处：《电路与系统学报》2006年第5期51-56,共6页Journal of Circuits and Systems

基　　金："十五"国防预研资助项目(10106050303)

摘　　要：本文首先提出了一种新型的水声通信网络的多址接入(UAMA)协议。该协议针对水声信道传播时延长的特点,利用扩频码进行多信道预约;通过适当的控制方法,采用与传统的握手协议不同的机制,当发送方发送request_to_send(RTS)后,在选择的业务信道上立刻传输数据,而不必等收到clear_to_send(CTS)后再传输数据,在时间和空间上大大地提高了信道的利用率,因此极大地提高了网络的吞吐量。通过使用OPNET Modeler/Radio仿真器对UAMA协议进行了基于有限状态机(FSM)的建模和设计。仿真结果表明该协议能在水声环境下取得优良的吞吐性能和较低的分组传输时延。In this paper, we first propose a novel multiple access protocol for underwater acoustic networks （UAMA）. Based on the characteristic of the large propagation delays of underwater acoustic channels, the reservation for multiple channels is made by means of spreading codes in this protocol. By virtue of proper control mechanism different from the traditional handshaking mechanisms, having not received the clear_to_send （CTS）, the sender switches to the choosen traffic channel to transmit data packets soon after the request_to_send （RTS） is sent over the control channel instead, which significantly increase the utilization of the channels in time and space, and thus the throughput is greatly improved. Based on the finite state machine （FSM）, we model and design the UAMA protocol by using the OPNET Modeler/Radio. Simulation results show that the proposed protocol can obtain higher throughput performance and lower packet transmission delays under the circumstances of underwater acoustic.

关 键 词：水声网络 水声信道 多址接入协议 有限状态机 吞吐量 时延 

分 类 号：TN914.41[电子电信—通信与信息系统]