近地卫星网络的一致随机超图数据传输模型

Transport Model of Uniform Random Hypergraph for Low Earth Orbit Networks

容忍延迟网络的架构提供了一种通信系统,更大程度地符合逐渐复杂的空间通信。针对近地卫星轨道网络,利用容忍延迟网络的bundle协议,数据块被封装成bundle包,在小卫星与地面基站之间进行传输。经过一段时间的传输和出错bundle包重传过程,利用随机超图构建了一致随机超图模型,建立bundle包传输的图结构,得出bundle包出错的概率和超图结构的关系,刻画了卫星与地面基站的消息传输过程。仿真实验证实了bundle出错概率和传输的图结构之间存在着紧密的关系。

The architecture of delay tolerant networks （DTN） provides a kind of communication system for growing complexity of space communication. Aiming to low earth orbit satellite networks, the data is encapsulated into multiple bundles and transmitted between a small satellite near earth and the ground stations by using the bundle protocol of DTN. During the process of data transport and the retransmission of the wrong bundle, a random uniform hypergraph model is constructed by using of random hypergraph, and the structure diagram of bundle transmission is also constructed. The model can obtain the relations of the error probabilities of bundles and the structure of hypergraph, and characterize the process of data transport between the satellite and the ground stations. Simulation results show that the error probabilities of bundles and the structure of hypergraph are closely related.