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GB/T 42040-2022Space data and information transfer systems—Unified space data link protocol (English PDF)

空间数据与信息传输系统统一空间数据链路协议

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 12, 2022

Implementation date

October 12, 2022

Scope

GB/T 42040-2022 is the English-translated version of 空间数据与信息传输系统统一空间数据链路协议.

GB/T 42040-2022 is the Chinese national standard for the unified space data link protocol (USLP) used in space data and information transfer systems. It covers the services, the data unit formats, the protocol procedures, the management parameters and the support for the space data link security protocol.

Its contents list names the multiple access point package, access and byte stream services, the operational control field, virtual channel frame, master channel frame, insert and communications operation procedure management services, the transfer frame with its primary header, insert zone, data field and frame error control field, and normative appendices on the truncated transfer frame and on CRC-16 coding.

Clause 1 applies it to link-layer data transmission from spacecraft to ground, from ground to spacecraft and between spacecraft. Issued on 12 October 2022, it has applied since the same date.

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Document preview — GB/T 42040-2022

National Standard of the People's Republic of China

ICS: 49.140
Classification: V 75

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Abbreviations
5 Protocol Overview
5.1 Related concepts
5.2 Business Overview
5.3 Function
6 business
6.1 Business data unit
6.2 Multiple Access Point Package Service
6.3 Multiple Access Point Access Service
6.4 Multiple access point byte stream service
6.5 Main channel operation control domain business
6.6 Virtual Channel Frame Service
6.7 Main channel frame service
6.8 Insert business
6.9 Communication operation procedure management business
7 Data unit format
7.1 Bit number convention
7.2 Uniform space data link protocol transmission frame
7.3 Transmission frame leading header
7.4 Transmission frame insertion field
7.5 Transmission frame data field
7.6 Operating the Control Domain
7.7 Frame error control field
8 Protocol Process
8.1 Sender protocol process
8.2 Receiver Protocol Process
9 Management parameters
9.1 General
9.2 Physical channel management parameters
9.3 Main channel management parameters
9.4 Virtual channel management parameters
9.5 MAP Channel Management Parameters
9.6 Packet transmission management parameters
10 Space Data Link Security Protocol
10.1 General requirements
10.2 Space data link security protocol format
10.3 Space data link security protocol process
10.4 Management parameters with spatial data link security
10.5 Management of space data link security services
Appendix A (Normative) Truncated Transport Frame Protocol Data Unit
Appendix B (informative) Frame randomization implementation for idle data transmission only
Appendix C (Normative) CRC-16 Frame Error Control Field Coding Process

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.

1 Scope

This document specifies the business, data unit format, Protocol flow, management parameters, and support for space data link security protocols.

This document is applicable to data communication from spacecraft to ground, from ground to spacecraft, and between spacecraft using the unified space data link protocol. According to the link layer data transmission service.

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 2900.54 Electrotechnical term radiocommunication. transmitter, receiver, network and operation

GB/T 39344-2020 Communication Operation Procedures for Spatial Data and Information Transmission System-1

GB/T 39348-2020 Spatial data and information transmission system telemetry synchronization and channel coding

GB/T 39349-2020 Spatial data and information transmission system remote synchronization and channel coding

GB/T 39353-2020 Space Data and Information Transmission System Proximity Space Link Protocol Synchronization and Coding Sublayer

GB/T 42041 Terminology for Space Data and Information Transmission in Aerospace

3 Terms and Definitions

GB/T 2900.54, GB/T 42041 and the following terms and definitions apply to this document.

3.1 Delimited

Data has properties of known and finite length.

3.2 Mission phase

A period of time in a space mission during which the mission process has specific objectives.

NOTE: The transition between two consecutive mission phases may cause interruption of communication services.

3.3 Space link

A communication link between a spacecraft and the corresponding ground system or between two spacecraft.

NOTE: A space link consists of one or more unidirectional or bidirectional physical channels.

4 Abbreviations

The following abbreviations apply to this document.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 59 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

GB/T 46724-2025Space data and information transfer systems - Space data link protocols over DVB-S2 standard

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