基于邻居节点属性的低轨卫星网络路由算法研究

Research on Routing Algorithm of LEO Satellite Network Based on Neighbor Node Attributes

摘要:

在远海目标探测数据传输至地面的过程中，采用低轨卫星网络转发具有发射成本低、传输时延小的优势；低轨卫星星座规模较大，星上资源受限，负载分布不均，设计合理的路由算法对提升数据回传的质量具有重要意义；现有的路由算法对拥塞现象的处理能力不足，针对此问题，提出了一种基于邻居节点属性的低轨卫星网络路由算法，根据各邻居卫星的候选次序属性和综合负载属性，确定待转发集合，合理分配集合内不同卫星的转发概率，为数据转发提供更充分的路径选择；仿真结果表明，该算法的平均时延和丢包率等性能指标相比于传统算法得到优化，能够保证探测数据高效可靠传输。

Abstract:

In the process of transmitting far-sea target detection data to the ground, the low earth orbit(LEO) satellite network has the advantages of low cost and low delay. LEO satellite constellation is large in scale, on-board resources are limited, and load distribution is uneven, so it is important to design a reasonable routing algorithm to improve the quality of data transmission. To solve this problem, a routing algorithm based on neighbor node attributes is proposed. According to the candidate order attributes and comprehensive load attributes of neighbor satellites, the forwarding probability is reasonably allocated to provide a more adequate route selection for avoiding congestion. The simulation results show that compared with the traditional algorithm, the average delay and packet loss rate of the proposed algorithm are optimized, which can ensure the efficient and reliable transmission of detection data.