基于移动agent的机坪机会传输控制方法

Opportunistic transmission control method based on mobile agent of apron network

针对民航机坪设备监控网络中存在过量数据分组而造成的数据拥塞和网络时延等问题,提出基于机会转发的路由算法.结合机坪与特种车辆的工况运行特点,建立了基于机会网络的机坪设备监控系统和节点移动模型;详述了基于移动agent的机坪机会网络路由算法机制,即依据消息权重计算消息副本的产生数量,将节点移动方向和自由度考虑进消息副本的产生与二叉发送中,再根据消息分组的优先级和缓存时长确定数据的缓存与释放顺序;在ONE环境下进行了试验验证.仿真结果表明:优化后的算法能有效减缓消息副本数量过多造成的数据冗余,降低路由开销和通信时延,将消息投递率提升27.78%;在路由资源有限的情况下,保障机坪设备工况数据在传输时具有稳定性和时效性.

To solve the data congestion and network delay caused by excessive data packets in monitoring network of civil aviation aircraft,a routing algorithm was proposed based on opportunistic network.With the consideration of special vehicle′s working condition,the model of node motion and monitoring system was established.The routing algorithm mechanism of opportunity network was described in detail.The number of message copies was calculated according to the weight of the message.Movement direction and freedom degree of a node were considered in message generation and transmission.Data cache and release policy were determined according to message packet′s priority and cache length.The experimental verification was carried out in the ONE environment.The simulation results show that the algorithm can reduce data redundancy effectively and increase the message delivery rate by 27.78%.For the limited routing resources,the proposed algorithm can guarantee the stability and timeliness of data transmission.