CCSDS空间网络互联协议发展及启示

空间互联网将是由各种区域网构成的复杂异构网络,为了使其能够逐步实现自动化运行,网络效益得到最大程度的发挥,须做好网络互联的顶层规划与设计,并开发具体的标准技术.根据近年CCSDS (Consultative Committee for Space Data Systems,空间数据系统咨询委员会)发布的建议书,以及相关工作组的项目规划情况,介绍了SSI(Solar System Internetwork,太阳系互联网)体系结构、IPoC(IP over CCSDS space links,在CCSDS空间链路之上承载IP),以及DTN(Delay Tolerant Networking,容延迟网络)等标准项目.从CCSDS空间网络互联技术的发展历程不难得出结论:我国未来空间网络互联应注重区域网之间互联的顶层设计;区域网内部各子网之间的互联技术应选择以航天任务需求牵引为主;DTN将在区域网之间互联以及区域网从简单到复杂发展中都发挥重要作用.

Evolving of CCSDS Space Internetworking Protocols and Some Reflections

Space internet will be a heterogeneous network composed of various regional networks. To realize automated operation of space internet and make space internet yield well, it is important to make top level design for internetworking of space internet and develop corresponding standards. According to recommendations published recently and project schedule of related working groups, the CCSDS (Consultative Committee for Space Data Systems) standardization projects of SSI (Solar System Internetwork) Architecture, IPoC (Internet Protocol over CCSDS space links) and DTN (Delay Tolerated Networking) are introduced. From evolving of CCSDS space internetworking techniques, it could be derived that a top level design for internetworking of regional networks shall be first made for the future Chinese space internet. The internetworking techniques for subnets within a regional network shall be selected mainly based on space mission requirements. DTN will play an important role in internetworking of regional networks and in progress of a regional network going from simple to complex