针对海洋通信环境复杂多变、海上无线基础设施少等特点,提出一种带有锚节点转发时间受限的路由算法.将延迟容忍网络应用于海洋环境中,利用船只存储、携带、转发消息,解决因节点移动造成的通信链路频繁断裂消息无法传送问题.在Matlab环境下对中国南海某海域渔船随机运动轨迹进行建模仿真,海上异构网络中数据包的产生服从泊松分布,在此基础上引入生存时间受限的转发机制.对海上容迟网络通信性能进行分析,比较生存时间、渔船数量以及无线网覆盖范围等对数据包投递的影响.仿真结果表明,该算法可提高数据交付率,降低网络传输时延,提升海上无线通信网络性能.%Aiming at the complex and ever-changeable marine communication environment and the lack of wireless infrastructure,a routing algorithm with anchor node forwarding time limitation is proposed.The application of DelayTolerant Network(DTN) in the marine environment,the use of the vessel to store,carry,forward messages is to solve the problems that the message can not be transmitted due to frequent mobile communications link breaks.In the Matlab environment,the random trajectory of fishing vessels in a sea area of the south China sea is modeled and simulated.The generation of data packets in a heterogeneous network is subject to Poisson distribution.Based on this,a forwarding mechanism with limited survival time is introduced.The communication performance of DTN is analyzed and the impact of the survival time,the number of fishing vessels and the wireless network coverage on the delivery of data packets is analyzed are compared.Simulation results show that,this algorithm reduce the network transmission delay and improve the performance of maritime wireless communication network.
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