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针对海洋通信环境复杂多变、海上无线基础设施少等特点,提出将时延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,比较了生存时间、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,增大数据生存时间和无线网覆盖范围可以提高数据交付率,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 changing marine communication environment and the lack of maritime wireless infrastructure, this paper proposes to apply the time delay tolerant network to the marine environment, and to use the information stored, carried and forwarded by ships to solve the problem of frequently breaking communication links caused by node movement Send the question. In the environment of MATLAB, the random trajectories of fishing vessels in a sea area of the South China Sea are modeled and simulated. Poisons are distributed in the data packets in the heterogeneous network, and the forwarding mechanism with limited survival time is introduced. This paper analyzes the communication performance of late-capacity network at sea and compares the impact of the survival time, the number of fishing vessels and the wireless network coverage on the delivery of data packets. Simulation results show that increasing data lifetime and coverage of wireless networks can improve data delivery rate, reduce network transmission delay and improve the performance of maritime wireless communication networks.