GB/T 42038-2022 English PDF

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GB/T 42038-2022: Space data and information transfer systems - File delivery protocol
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Basic data

Standard ID: GB/T 42038-2022 (GB/T42038-2022)
Description (Translated English): Space data and information transfer systems - File delivery protocol
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: V75
Classification of International Standard: 49.140
Word Count Estimation: 78,743
Date of Issue: 2022-10-12
Date of Implementation: 2022-10-12
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42038-2022: Space data and information transfer systems - File delivery protocol

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Space data and information transfer systems - File delivery protocol ICS 49.140 CCSV75 National Standards of People's Republic of China Space Data and Information Transmission System file transfer protocol File delivery protocol Released on 2022-10-12 2022-10-12 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Abbreviations 2 5 General 2 5.1 Overview 2 5.2 Structural Composition 3 5.3 Protocol Features 4 5.4 Interaction conventions 6 6 business 8 6.1 User Interface Services 8 6.2 Primitives 8 6.3 Parameter description 9 6.4 Business Primitives 12 6.5 Required UT layer services 19 7 protocol procedures 19 7.1 CRC procedure 19 7.2 Checksum procedure 20 7.3 Submission procedures 20 7.4 Transaction start notification procedure 20 7.5 PDU forwarding procedures 20 7.6 Document copying procedures 21 7.7 ACK procedure 26 7.8 Error Handling Procedure 27 7.9 Document storage procedures 27 7.10 Inactivity Monitoring Procedure 27 7.11 Internal procedures 28 7.12 Link state change procedure 30 8 Protocol data unit format 31 8.1 Bit number convention 31 8.2 General requirements 31 8.3 File command PDU 33 8.4 File Data PDU 38 8.5 TLV parameters 38 9 User Operations 41 9.1 Reserved message format 41 9.2 Proxy operation 42 9.3 Directory operations 46 9.4 Remote Status Report Operation 47 9.5 Remote suspend operation 49 9.6 Remote Recovery Operation 51 10 business categories 52 10.1 Business category definition 52 10.2 Unreliable transport 52 10.3 Reliable Transport 54 11 Management Information Base 57 Appendix A (informative) store-and-forward override operations 59 Appendix B (informative) checksum calculation example 66 Reference 68 Fig.1 Elements of file transfer protocolFig.3 Figure 2 Schematic diagram of file transfer protocol procedure 4 Figure 3 Copy operation process 6 Figure 4 Submit request process and sequence of events 7 Figure 5 File storage and forwarding process and event sequence 7 Figure 6 Proxy submission request process and sequence of events 8 Figure 7 bit sequence number convention 31 Figure 8 PDU Composition 31 Figure 9 File command PDU composition 34 Figure 10 File data PDU composition 38 Figure 11 Unreliable transmission event Figure 54 Figure 12 Reliable transport function event diagram 56 Figure A.1 SFO operation 59 Table 1 PDU header field 32 Table 2 LV object format 33 Table 3 TLV object format 33 Table 4 File instruction code and corresponding instruction 34 Table 5 Status codes and corresponding status 34 Table 6 EOFPDU command parameter field content 35 Table 7 Completing the PDU command parameter field content 35 Table 8 ACKPDU instruction parameter field content 36 Table 9 Metadata PDU command parameter field content 36 Table 10 NAKPDU command parameter field content 37 Table 11 Segment Request Composition 37 Table 12 Prompt PDU command parameter field content 37 Table 13 Keep-alive PDU command parameter field content 38 Table 14 Contents of the file data PDU data field 38 Table 15 File storage request TLV value 39 Table 16 Opcode 39 of File Storage Request TLV Table 17 File storage response TLV value 39 Table 18 File storage response status code 40 Table 19 Coding of the TLV of the fault handling option 41 Table 20 Reserved message header 41 Table 21 Source transaction ID message 42 Table 22 Agent operation message type values and their meanings 42 Table 23 Proxy submission request message format 43 Table 24 Proxy MTU message format 43 Table 25 Agent file storage request message format 43 Table 26 Agent Failure Handling Options Message Format 43 Table 27 Proxy transfer mode message format 44 Table 28 Agent flow label message format 44 Table 29 Proxy segment control message format 44 Table 30 Proxy Transport Reply Message Format 45 Table 31 Proxy file storage response message format 45 Table 32 Directory operation message type 46 Table 33 Directory listing request message format 46 Table 34 Directory listing reply message format 47 Table 35 Remote status report operation message type value description 47 Table 36 Remote status report request message format 48 Table 37 Remote status report response message format 48 Table 38 Value Description of Remote Suspend Operation Message Type 49 Table 39 Remote Suspend Request Message Format 49 Table 40 Remote Hang Reply Message Format 50 Table 41 Value Description of Remote Recovery Operation Message Type 51 Table 42 Remote recovery request message format 51 Table 43 Remote Recovery Response Message Format 52 Table 44 Unreliable transmission source procedures 53 Table 45 Unreliable transmission destination procedures 53 Table 46 Reliable Transmission Source Procedures 54 Table 47 Reliable transmission destination procedure 55 Table 48 Local protocol entity configuration information parameter 57 Table 49 Remote protocol entity configuration information parameter 57 Table A.1 SFO message type 60 Table A.2 SFO request message 61 Table A.3 SFOMTU message 61 Table A.4 SFO file storage request message 62 Table A.5 SFO fault handling option message 62 Table A.6 SFO flow label FlowLabel message 62 Table A.7 SFO report message 64 Table A.8 SFO file storage response message 65 Table B.1 File data PDU content 66 Table B.2 File reception sequence 67

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document was drafted with reference to ISO 17355.2007 "CCSDS File Transfer Protocol for Spatial Data and Information Transmission System". degrees are not equivalent. Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed and managed by the National Aerospace Technology and Its Application Standardization Technical Committee (SAC/TC425). This document was drafted by. Beijing Space Vehicle Overall Design Department, Tsinghua University, China Academy of Space Technology Remote Sensing Satellite General Department, Beijing Institute of Tracking and Communication Technology, Nanjing University, China Aerospace Standardization Institute, Beijing Remote Sensing Equipment Research Institute, Ningbo Weicheng Technology Co., Ltd. Co., Ltd., Guangzhou Jingwei Standard Technology Service Co., Ltd., Zhongshan Pauway Testing Technology Co., Ltd., Guangdong Ruizhou Technology Co., Ltd. The main drafters of this document. He Xiongwen, Yu Sheng, Xu Mingwei, Guo Jian, Mao Yilan, Chen Yunjun, Liu Chonghua, Qiao Liang, Liu Xin, Zhao Kangyan, Yang Lijun, Tong Ling, Zhan Panpan, Zhou Yuxia, Qi Zheng, Yan Dong, Zhang Cuitao, Gu Ming, Liu Weiwei, Cheng Bowen, Niu Jiaxiang, Wang Duo, Yuan Xin, Yu Bo, Zhao Weiping, Zeng Daqing, Guo Huazhong. Space Data and Information Transmission System file transfer protocol

1 Scope

This document specifies the business definition, protocol procedures, protocol data unit format, User operations, business categories, and management information base, etc. This document is applicable to the file transfer from the spacecraft to the ground, from the ground to the spacecraft, and between spacecraft, and supports the file storage of the spacecraft. Perform operations such as upload, download and control.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 39350 Spatial Data and Information System Remote Spatial Data Link Protocol GB/T 42041 Terminology for Space Data and Information Transmission in Aerospace

3 Terms and Definitions

The following terms and definitions defined in GB/T 42041 apply to this document. 3.1 protocol entity protocolentity A concrete implementation instance of a file transfer protocol, similar to an Internet Protocol host. 3.2 metadata metadata Data that defines and describes other data. 3.3 Protocol data unit protocoldataunit Independent, bounded, self-identifying data transmitted between protocol entities. Note. There are two types of file data and file instructions. 3.4 transaction A uniquely identifiable file transfer unit (FDU) end-to-end transfer between two protocol entities. NOTE. Typically involves the transmission and reception of multiple Protocol Data Units (PDUs). 3.5 file storage filestore The medium used to store files. 3.6 offset The number of data bytes preceding a particular byte in the file data. ......

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