Application of high data-rate space laser communication system in aerospace information networks
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摘要: 针对高速空间激光通信系统应用时面临的主要问题：节点高速运动的跟踪瞄准和与组网载荷协同工作，提出将高速空间激光通信系统作为节点主要通信载荷的双通信载荷结构，并设计了高速空间激光通信系统与组网载荷协同工作机制和协议模型，依据协议模型进行了原理样机开发与试验。试验结果表明，提出的协同工作机制与协议模型能很好地适用于高速空间激光系统，支持超高速率数据传输，最高MAC层协议数据速率可达1.772 Gb/s，平均处理时延20 s。Abstract: High data-rate space laser communication system is capable of providing gigabit data throughput between space-based platforms and is used in aerospace information networks as high speed network link between neighbouring nodes. Tracking and pointing problem due to high-speed movement of space nodes and collaboration problem with network payload are two major challenges. Based on the analysis of system components of high data-rate space laser communication system, this paper proposed a two communication payloads architecture which used the high-rate space laser communication system as the primary communication payload of network nodes in aerospace information networks, designed the collaborative work mechanism between the high data-rate space laser communication system and the network payload, as well as the communication protocol model in aerospace information networks. According to this protocol model, we developed the hardware and software prototypes and carried out some tests. The test result shows that the proposed collaborative work mechanism and protocol model are applicable to aerospace information networks.
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