In consultative committee for space data systems（CCSDS） file delivery protocol（CFDP） recommendation of reliable transmission,there are no detail transmission procedure and delay calculation of prompted negative ac...In consultative committee for space data systems（CCSDS） file delivery protocol（CFDP） recommendation of reliable transmission,there are no detail transmission procedure and delay calculation of prompted negative acknowledge and asynchronous negative acknowledge models.CFDP is designed to provide data and storage management,story and forward,custody transfer and reliable end-to-end delivery over deep space characterized by huge latency,intermittent link,asymmetric bandwidth and big bit error rate（BER）.Four reliable transmission models are analyzed and an expected file-delivery time is calculated with different trans-mission rates,numbers and sizes of packet data units,BERs and frequencies of external events,etc.By comparison of four CFDP models,the requirement of BER for typical missions in deep space is obtained and rules of choosing CFDP models under different uplink state informations are given,which provides references for protocol models selection,utilization and modification.展开更多
如何构建空间攻防网络是空间作战的一项关键技术。深入分析研究了CCSDS分包遥测、分包遥控、AOS建议及主网模型,提出了基于IP over CCSDS的空间攻防网络设计概念,分析和选择了相关的数据交换协议,构建了空间网络与地面网络端到端通信网...如何构建空间攻防网络是空间作战的一项关键技术。深入分析研究了CCSDS分包遥测、分包遥控、AOS建议及主网模型,提出了基于IP over CCSDS的空间攻防网络设计概念,分析和选择了相关的数据交换协议,构建了空间网络与地面网络端到端通信网络协议栈模型,并对CCS-DS技术在我国航天测控通信网中的应用提出了改造建议和应用思路。展开更多
为解决航天器数据管理系统体系架构中,由于接口方式和协议不一致以及设计的多样化,导致难以沟通和重用的问题,CCSDS(The Consultative Committee for Space Data Systems)的SOIS(Space Onboard Interface Services)工作组提出了体系架构...为解决航天器数据管理系统体系架构中,由于接口方式和协议不一致以及设计的多样化,导致难以沟通和重用的问题,CCSDS(The Consultative Committee for Space Data Systems)的SOIS(Space Onboard Interface Services)工作组提出了体系架构,并制定了相应的业务推荐标准文本.结合SOIS架构,概括介绍了ESA(European Space Agency)提出的SAVOIR(Space Avionics Open Interface aRchitecture)架构,NASA(National Aeronautics and Space Administration)提出的cFE/cFS架构,以及我国对SOIS的跟踪研究情况,并对这几个架构进行了比较和分析.这几个架构的共同点在于对层次化、模块化、接口标准化和模型化的重用特征在认识上是一致的,但是在具体设计上由于各自的背景不同而不尽相同.另一个共同的认识是将电子数据单(Electronic Data Sheet,EDS)作为架构的设计重点之一,为此对数据设计的两个主要概念,管理信息库(Management Information Base,MIB)和EDS之间的关系和设计思路进行了分析说明.最后展望了空间数据系统体系架构的一些发展趋势,认为基于EDS和MIB的数据设计将成为主要研究内容之一,并且SOIS架构的实践应结合自身的特点来开展.展开更多
Satellite networking communications in navigation satellite system and spacebased deep space exploration have the features of a long delay and high bit error rate （BER）. Through analyzing the advantages and disadvan...Satellite networking communications in navigation satellite system and spacebased deep space exploration have the features of a long delay and high bit error rate （BER）. Through analyzing the advantages and disadvantages of the Consulta tive Committee for the Space Data System （CCSDS） file delivery protocol （CFDP）, a new improved repeated sending file delivery protocol （RSFDP） based on the adaptive repeated sending is put forward to build an efficient and reliable file transmission. According to the estimation of the BER of the transmission link, RSFDP repeatedly sends the lost protocol data units （PDUs） at the stage of the retransmission to improve the success rate and reduce time of the retransmission. Theoretical analyses and results of the Opnet simulation indicate that the performance of RSFDP has significant improvement gains over CFDP in the link with a long delay and high BER. The realizing results based on the space borne filed programmable gate array （FPGA） platform show the applicability of the proposed algorithm.展开更多
基金supported by the National Natural Science Fandation of China (6067208960772075)
文摘In consultative committee for space data systems（CCSDS） file delivery protocol（CFDP） recommendation of reliable transmission,there are no detail transmission procedure and delay calculation of prompted negative acknowledge and asynchronous negative acknowledge models.CFDP is designed to provide data and storage management,story and forward,custody transfer and reliable end-to-end delivery over deep space characterized by huge latency,intermittent link,asymmetric bandwidth and big bit error rate（BER）.Four reliable transmission models are analyzed and an expected file-delivery time is calculated with different trans-mission rates,numbers and sizes of packet data units,BERs and frequencies of external events,etc.By comparison of four CFDP models,the requirement of BER for typical missions in deep space is obtained and rules of choosing CFDP models under different uplink state informations are given,which provides references for protocol models selection,utilization and modification.
文摘如何构建空间攻防网络是空间作战的一项关键技术。深入分析研究了CCSDS分包遥测、分包遥控、AOS建议及主网模型,提出了基于IP over CCSDS的空间攻防网络设计概念,分析和选择了相关的数据交换协议,构建了空间网络与地面网络端到端通信网络协议栈模型,并对CCS-DS技术在我国航天测控通信网中的应用提出了改造建议和应用思路。
文摘为解决航天器数据管理系统体系架构中,由于接口方式和协议不一致以及设计的多样化,导致难以沟通和重用的问题,CCSDS(The Consultative Committee for Space Data Systems)的SOIS(Space Onboard Interface Services)工作组提出了体系架构,并制定了相应的业务推荐标准文本.结合SOIS架构,概括介绍了ESA(European Space Agency)提出的SAVOIR(Space Avionics Open Interface aRchitecture)架构,NASA(National Aeronautics and Space Administration)提出的cFE/cFS架构,以及我国对SOIS的跟踪研究情况,并对这几个架构进行了比较和分析.这几个架构的共同点在于对层次化、模块化、接口标准化和模型化的重用特征在认识上是一致的,但是在具体设计上由于各自的背景不同而不尽相同.另一个共同的认识是将电子数据单(Electronic Data Sheet,EDS)作为架构的设计重点之一,为此对数据设计的两个主要概念,管理信息库(Management Information Base,MIB)和EDS之间的关系和设计思路进行了分析说明.最后展望了空间数据系统体系架构的一些发展趋势,认为基于EDS和MIB的数据设计将成为主要研究内容之一,并且SOIS架构的实践应结合自身的特点来开展.
基金supported by the National High Technology Research and Development Program of China (863 Program) (2011AA1569)
文摘Satellite networking communications in navigation satellite system and spacebased deep space exploration have the features of a long delay and high bit error rate （BER）. Through analyzing the advantages and disadvantages of the Consulta tive Committee for the Space Data System （CCSDS） file delivery protocol （CFDP）, a new improved repeated sending file delivery protocol （RSFDP） based on the adaptive repeated sending is put forward to build an efficient and reliable file transmission. According to the estimation of the BER of the transmission link, RSFDP repeatedly sends the lost protocol data units （PDUs） at the stage of the retransmission to improve the success rate and reduce time of the retransmission. Theoretical analyses and results of the Opnet simulation indicate that the performance of RSFDP has significant improvement gains over CFDP in the link with a long delay and high BER. The realizing results based on the space borne filed programmable gate array （FPGA） platform show the applicability of the proposed algorithm.
