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GB/T 39351-2020Space Data and Information Transmission System Telemetry Space Data Link Protocol (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

November 19, 2020

Implementation date

June 1, 2021

Scope

GB/T 39351-2020 (Space Data and Information Transmission System Telemetry Space Data Link Protocol) is available as an English-translated PDF.

GB/T 39351-2020 — This standard specifies the telemetry space data link protocol business, data unit format, protocol process, management parameters and support space data According to the protocol procedures of the link security protocol. This standard applies to the transmission of telemetry data from spacecraft to earth station and between spacecraft and spacecraft.

Document preview — GB/T 39351-2020

National Standard of the People's Republic of China

Classification: V 75

Issued by: State Administration for Market Regulation, China National Standardization Administration

1 Scope1
2 Normative references1
3 Terms and definitions1
4 Abbreviations2
5 Overview3
5.1 Protocol concept3
5.2 Business Overview4
5.3 Function overview8
6 Business10
6.1 Overview10
6.2 Business Data Unit10
6.3 Virtual Channel Package (VCP) Service11
6.4 Virtual Channel Access (VCA) Service12
6.5 Virtual channel frame sub-header (VC_FSH) service13
6.6 Virtual channel operation control domain (VC_OCF) business14
6.7 Virtual Channel Frame (VCF) Service15
6.8 Main channel frame sub-header (MC_FSH) service16
6.9 Main channel operation control domain (MC_OCF) service17
6.10 Main Channel Frame (MCF) Service17
7 Data unit format18
7.1 Convention of bit number18
7.2 Telemetry transmission frame19
7.3 Transmission frame leading header19
7.4 Transmission frame sub-header22
7.5 Transmission frame data field23
7.6 Operation Control Domain23
7.7 Frame Error Control Field24
8 Agreement process26
8.1 Sender protocol flow26
8.2 Receiver protocol flow30
9 Management parameters34
9.1 Overview34
9.2 Physical channel management parameters34
9.3 Main channel management parameters35
9.4 Virtual channel management parameters35
9.5 Packet transmission management parameters35
10 Support SDLS agreement36
10.1 Overview36
10.2 SDLS protocol format specification36
10.3 SDLS protocol flow38
10.4 SDLS management parameters40
Appendix A (informative appendix) Structural changes of this standard compared with ISO 22645.201641
Appendix B (informative appendix) Technical differences between this standard and ISO 22645.2016 and the reasons43
Figure 1 Hierarchical relationship between telemetry spatial data link protocol and OSI3
Figure 2 Relationship between channels4
Figure 3 Asynchronous business model5
Figure 4 Synchronous business model6
Figure 5 The internal composition of the sender protocol entity8
Figure 6 The internal composition of the receiving end protocol entity9
Figure 7.Telemetry spatial data link protocol channel tree9
Figure 8 The convention of the serial number19
Figure 9.Telemetry transmission frame composition structure19
Figure 10 Transmission frame leading header20
Figure 11 State of the data field of the transmission frame21
Figure 12 Transmission frame sub-leader22
Figure 13 Frame error control coding logic Figure25
Figure 14 Frame error control decoding logic diagram25
Figure 15 Packet processing function abstract model26
Figure 16 Abstract model of virtual channel generation function27
Figure 17.Abstract model of virtual channel multiplexing function28
Figure 18 Main channel generation function abstract model28
Figure 19.Main channel multiplexing function abstract model29
Figure 20 An abstract model of all frame generation functions30
Figure 21 Abstract model of the package extraction function31
Figure 22 Abstract model of virtual channel receiving function31
Figure 23 Abstract model of virtual channel demultiplexing function32
Figure 24 Abstract model of the main channel receiving function33
Figure 25 Abstract model of main channel demultiplexing function33
Figure 26 Abstract model of all frame receiving functions34
Figure 27 Comparison of frame without SDLS and frame with SDLS37
Table 1 Services provided by the telemetry space data link protocol7
Table 2 Physical channel management parameters34
Table 3 Main channel management parameters35
Table 4 Virtual channel management parameters35
Table 5 Packet transmission management parameters35
Table 6 Telemetry services protected by SDLS protocol36
Table A.1 The comparison between this standard and ISO 22645.2016 chapter number41
Table B.1 Technical differences between this standard and ISO 22645.2016 and the reasons43

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard uses the redrafting method to modify and adopt ISO 22645.2016 "Space Data and Information Transmission System Telemetry Space Data Link Protocol".

Compared with ISO 22645.2016, this standard has many structural adjustments. Appendix A lists this standard and ISO 22645.2016

The chapter number comparison list.

Compared with ISO 22645.2016, there are technical differences between this standard, and the clauses involved in these differences have been passed on the outer margins.

The vertical single line (︱) is marked, and a list of the corresponding technical differences and their reasons is given in Appendix B.

This standard also made the following editorial changes.

---Deleted part of the references to the principle definition document structure in Chapter 1 of ISO 22645.2016;

--- Change Appendix A "Abbreviations" in ISO 22645.2016 to Chapter 4 of the main text;

---The informative appendix B "References" of ISO 22645.2016 was deleted.

This standard was proposed and managed by the National Aerospace Technology and Application Standardization Technical Committee (SAC/TC425).

Drafting organizations of this standard. China Aerospace Standardization Institute, Beijing Space Vehicle General Design Department, Anhui Wantong Technology Co., Ltd.

Division, Shenzhen Institute of Aerospace Science and Technology Innovation, Beijing Institute of Telemetry Technology, Beijing Institute of Tracking and Communication Technology.

1 Scope

This standard specifies the telemetry space data link protocol business, data unit format, protocol process, management parameters and support space data

According to the protocol procedures of the link security protocol.

This standard applies to the transmission of telemetry data from spacecraft to earth station and between spacecraft and spacecraft.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article

Pieces. For undated references, the latest version (including all amendments) applies to this document.

GB/T 2900.54 Electrotechnical terminology radio communication. transmitter, receiver, network and operation (GB/T 2900.54-2002,

IEC 60050-713..1998, IDT)

3 Terms and definitions

The following terms and definitions defined in GB/T 2900.54 apply to this document.

3.1

package

A basic data unit composed of application data plus packet header.

Note. Packet service transmission via virtual channel.

3.2

Telemetry transmission frame

A protocol data unit oriented to the transmission process suitable for transmission of telemetry data.

Note. The telemetry transmission frame provides a data structure for the transmission package or custom data.

3.3

Virtual channel

A transmission control mechanism that enables multiple sources and multiple users to share the same physical channel. Through the unified distribution of the identification code of the transmission frame header, and

Implement dynamic management according to user needs and actual channel conditions, so that different user application data time-sharing alternately occupy physical channels, which is equivalent to a single

The channel is divided into multiple virtual branches.

3.4

Free data

Data that does not contain any information.

Note. The transmission of idle data is only to meet the needs of timing and synchronization. It is recommended to use a bit sequence between "1" and "0".

3.5

Free package

Load free data packets in the packet data field.

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

Referenced standards

Normative references

GB/T 2900.54 · GB/T 2900.54-2002 · IEC 60050

Cited by

GB/T 39350-2020Space data and information transfer systems. TC (telecommand) space data link protocol

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