天基数据空间链路统一融合传输协议研究

Research on Unified Fusion Transmission Protocol for Space-Based Data Space Links

中文关键词:  统一空间数据链路协议  IP over CCSDS  IP数据包  空间数据包

英文关键词:USLP  IPoC  IP data packet  space data packet

中文摘要:

      针对星地、星间复杂空间链路之间的高效数据传输需求，融合国际空间数据系统咨询委员会（Consultative Committee for Space Date System,CCSDS）与传输控制协议（Transmission Control Protocol,TCP）/互联网协议（Internet Protocol,IP），基于物理层、数据链路层、网络层、传输层、应用层协议模型，提出了空间链路统一传输协议总体设计方案。针对不同空间链路协议差异导致的数据交互复杂问题，数据链路层采用统一空间数据链路协议，实现异构空间链路多业务混合传输；网络层采用封装数据包和IPoC（IP over CCSDS）协议承载IP数据，便于统一寻址；应用层采用空间数据包协议。通过数据链路层传输帧信道复用、网络层IP数据包复用与聚合、应用层空间数据包聚合，在不同通信协议层面实现了不同应用数据的融合传输。在地面测试系统中模拟星地、星间通信场景，验证了所提出的空间链路网络协议格式和数据传输服务的有效性。

英文摘要:

      Aimed at the requirement for efficient data transmission among space-ground and inter-satellite complex space links,an overall design scheme of unified transmission protocol for space links is proposed by integrating consultative committee for space data system(CCSDS)and transmission control protocol/internet protocol(TCP/IP),which based on protocol model,including physical layer,data link layer,network layer,transport layer,and application layer.In response to the complexity of data exchange caused by differences in different space links protocols,data link layer adopts unified space data link protocol(USLP) to achieve mixed transmission of multiple services in heterogeneous space links,network layer adopts encapsulation data packet protocol and IP over CCSDS（IPoC）protocol to carry IP data for unified addressing,application layer adopts the space data packet protocol.The data from different applications can transmit convergently at different communication protocal layers through channel multiplexing on data link layer,IP data packet multiplexing and aggregation on network layer and space packet aggregation on application layer.A simulation about space-ground and inter-satellite communication is carried out in the ground test system to verify the effectiveness of space links network protocol stack and data transmission service.