基于星间网络拓扑技术的星间链路优化设计

Inter-satellite link optimization design based on inter-satellite network topology technology

摘要:

摘要：在星间网络环境中，全链路生命周期达不到预期标准数值，进而导致拓扑信道传输特性不能得到满足，基于此现状，设计星间网络拓扑技术支持下的星间链路优化方法。在网络拓扑框架中，规划星间传感器节点的具体位置，推导拓扑演化所需的机制条件，提升全链路组织中数据信息的理想生命周期数值，完成星间网络的拓扑结构设计。在此基础上，研究星间链路的基本结构形式，判断处理优化流程的合理性，根据具体的优化设计建立条件，完成静态与动态链路的优化设计，实现星间链路优化设计的条件与流程完善。联合LDPC码，构造标准的星间校验矩阵，并处理信道中编码数据的译码形态，满足拓扑信道的传输特性，完成星间信道的LDPC编码，实现基于星间网络拓扑技术的星间链路优化设计。建立星间网络环境进行比对性实验，数据结果显示优化后星间链路生命周期最大值提升至135ms，WIT指标数值始终保持在70%左右，拓扑信道传输特性得到满足。

Abstract:

Abstract: In the inter-satellite network environment, the life cycle of the full link is not up to the expected standard value, and thus the transmission characteristics of the topology channel cannot be satisfied. Based on this situation, the inter-satellite link optimization method supported by the inter-satellite network topology technology is designed. In the network topology framework, the specific location of inter-satellite sensor nodes is planned, the mechanism conditions necessary for topology evolution are deduced, the ideal life cycle value of data information in the all-link organization is promoted, and the topology structure design of inter-satellite network is completed. On this basis, the basic structural form of inter-satellite link is studied, and the rationality of the processing optimization process is judged. Based on the specific optimization design, the conditions are established to complete the optimal design of static and dynamic links, and the conditions and processes of the optimal design of inter-satellite links are improved. Combine LDPC codes, construct standard inter-satellite check matrix, and process the decoding form of encoded data in the channel, so as to meet the transmission characteristics of topology channel, complete the LDPC coding of inter-satellite channel, and realize the optimal design of inter-satellite link based on inter-satellite network topology technology. The inter-satellite network environment was established for comparison experiments, and the data results showed that the maximum life cycle of inter-satellite link was increased to 135ms after optimization, WIT index value was always kept at about 70%, and the transmission characteristics of topological channel were satisfied.