1、BSI Standards PublicationBS EN 16603-50-04:2014Space engineering Spacedata links Telecommandprotocols, synchronization andchannel codingBS EN 16603-50-04:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN16603-50-04:2014.The UK participation in its preparation
2、 was entrusted to TechnicalCommittee ACE/68, Space systems and operations.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctappl
3、ication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 84101 9ICS 33.040.40; 49.090; 49.140Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and
4、 Strategy Committee on 30 September 2014.Amendments issued since publicationDate Text affectedBS EN 16603-50-04:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16603-50-04 September 2014 ICS 33.040.40; 49.090; 49.140 English version Space engineering - Space data links - Telecommand protoco
5、ls, synchronization and channel coding Ingnierie spatiale - Liaisons de donnes spatiales - Protocoles, synchronisation et codage canal des liaisons tlcommande Raumfahrttechnik - Telekommando-Protokolle, -synchronisation und -kanalkodierung This European Standard was approved by CEN on 25 April 2014.
6、 CEN and CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be
7、obtained on application to the CEN-CENELEC Management Centre or to any CEN and CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN and CENELEC member into its own lan
8、guage and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Y
9、ugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17,
10、B-1000 Brussels 2014 CEN/CENELEC All rights of exploitation in any form and by any means reserved worldwide for CEN national Members and for CENELEC Members. Ref. No. EN 16603-50-04:2014 EBS EN 16603-50-04:2014EN 16603-50-04:2014 (E) 2 Table of contents Foreword 10 1 Scope . 11 2 Normative reference
11、s . 12 3 Terms, definitions and abbreviated terms 13 3.1 Terms from other standards 13 3.2 Terms specific to the present standard . 13 3.3 Abbreviated terms. 14 3.4 Conventions 15 3.4.1 Bit 0, bit 1, bit N1 . 15 3.4.2 Most significant bit. 15 3.4.3 Use of capitals for the names of data structures an
12、d fields 15 4 Overview 16 4.1 Presentation . 16 4.2 Protocol profiles 16 4.3 Segmentation sublayer . 17 4.4 Transfer sublayer 18 4.5 Synchronization and channel coding sublayer 18 4.6 Physical layer . 18 4.7 Virtual channels 19 5 Segmentation sublayer 20 5.1 Overview 20 5.2 TC Segment . 21 5.2.1 Gen
13、eral . 21 5.2.2 Segment Header . 22 5.2.3 Segment Data Field 23 5.3 Transfer notification 23 5.3.1 Overview . 23 5.3.2 Requirements 24 5.4 Blocking of packets . 25 BS EN 16603-50-04:2014EN 16603-50-04:2014 (E) 3 5.4.1 Overview . 25 5.4.2 Virtual channels where TC Segments are used . 25 5.4.3 Virtual
14、 channels where TC Segments are not used . 26 5.4.4 Packet properties 26 5.4.5 Blocking function . 27 5.4.6 Deblocking function . 27 5.5 Segmentation . 27 5.5.1 Overview . 27 5.5.2 Segmenting function . 28 5.5.3 Reassembly function . 28 5.5.4 Packet assembly controller . 29 5.6 MAP multiplexing 32 6
15、 Transfer sublayer . 33 6.1 Overview 33 6.1.1 Data structures in the transfer sublayer . 33 6.1.2 Procedures in the transfer sublayer . 33 6.2 TC Transfer Frame definition 35 6.2.1 General . 35 6.2.2 Transfer Frame Primary Header 36 6.2.3 Transfer Frame Data Field 40 6.2.4 Frame Error Control Field
16、41 6.3 CLCW definition 43 6.3.1 General . 43 6.3.2 Control Word Type 45 6.3.3 CLCW Version Number . 45 6.3.4 Status Field . 45 6.3.5 COP in Effect 45 6.3.6 Virtual Channel Identification . 45 6.3.7 Reserved Spare 46 6.3.8 No RF Available Flag 46 6.3.9 No Bit Lock Flag 47 6.3.10 Lockout Flag . 47 6.3
17、.11 Wait Flag . 48 6.3.12 Retransmit Flag . 48 6.3.13 FARM-B Counter 48 6.3.14 Reserved Spare 48 6.3.15 Report Value . 49 BS EN 16603-50-04:2014EN 16603-50-04:2014 (E) 4 6.4 Frame header procedure 49 6.5 Frame error control procedure at the sending end 49 6.6 Frame delimiting and fill removal proced
18、ure 49 6.6.1 Overview . 49 6.6.2 Actions 50 6.7 Frame error control procedure at the receiving end 50 6.8 Frame header validation procedure 50 6.8.1 Overview . 50 6.8.2 Actions 51 6.9 Virtual channel multiplexing 51 6.9.1 Overview . 51 6.9.2 Multiplexing mechanism 52 6.9.3 Demultiplexing 52 7 COP-1.
19、 53 7.1 Overview 53 7.1.1 Scope 53 7.1.2 Interfaces 53 7.1.3 Retransmission protocol 53 7.1.4 Frames 54 7.1.5 Services 54 7.1.6 Protocol machine 56 7.2 Internal variables 56 7.2.1 Overview . 56 7.2.2 FOP-1 Variables . 57 7.2.3 FARM-1 variables . 64 7.3 Features of COP-1 interfaces . 69 7.3.1 Overvie
20、w . 69 7.3.2 Parameters . 70 7.4 Upper interface of COP-1 at the sending end . 70 7.4.1 Overview . 70 7.4.2 Sequence-controlled service management interface . 71 7.4.3 Sequence-controlled service data transfer interface 77 7.4.4 Expedited service data transfer interface 80 7.5 Upper interface of COP
21、-1 at the receiving end 82 7.5.1 Overview . 82 7.5.2 Buffer management mechanism 82 7.5.3 The wait system 82 BS EN 16603-50-04:2014EN 16603-50-04:2014 (E) 5 7.5.4 Single back-end buffer 83 7.5.5 FDU Arrived Indication 84 7.6 Lower interface of COP-1 at the sending end . 84 7.6.1 Overview . 84 7.6.2
22、Transmit Request for Frame signal . 85 7.6.3 Abort request signal 85 7.6.4 Response signal . 86 7.7 Lower interface of COP-1 at the receiving end 86 7.7.1 Overview . 86 7.7.2 Valid Frame Arrived Indication 87 7.8 Format of COP-1 control commands 87 7.8.1 Overview . 87 7.8.2 General . 87 7.8.3 Unlock
23、 . 87 7.8.4 Set V(R) 88 7.9 Actions 88 7.9.1 Format of the state tables 88 7.9.2 FOP-1 . 89 7.9.3 FARM-1 96 8 Synchronization and channel coding sublayer . 111 8.1 Overview 111 8.2 BCH codeblock . 111 8.2.1 General . 111 8.2.2 Information 112 8.2.3 Error Control . 112 8.3 Communications link transmi
24、ssion unit (CLTU) . 113 8.3.1 General . 113 8.3.2 Start Sequence . 113 8.3.3 Encoded Data . 114 8.3.4 Tail Sequence . 114 8.4 Randomization procedure . 115 8.4.1 Overview . 115 8.4.2 General . 115 8.4.3 Random sequence 115 8.4.4 Application of the randomizer 116 8.5 BCH codeblock encoding procedure
25、. 116 8.6 Fill bits 117 BS EN 16603-50-04:2014EN 16603-50-04:2014 (E) 6 8.6.1 Overview . 117 8.6.2 General . 117 8.7 Channel logic at the receiving end 118 8.8 BCH codeblock decoding procedures . 119 8.8.1 Overview . 119 8.8.2 General . 120 9 Physical layer 121 9.1 Overview 121 9.2 Physical layer da
26、ta structures . 121 9.2.1 Acquisition sequence 121 9.2.2 CLTU 122 9.2.3 Idle sequence 122 9.3 Physical layer procedures . 122 9.3.1 Overview . 122 9.3.2 Carrier modulation modes . 122 9.3.3 Telecommand session 124 9.3.4 Physical layer operation procedure (PLOP) 124 Annex A (informative) Frame error
27、control . 127 A.1 Overview 127 A.2 Encoding 127 A.3 Decoding 128 Annex B (informative) Changes from ESA-PSS-04-107 . 129 B.1 Overview 129 B.2 Technical changes 129 Annex C (informative) Differences from CCSDS recommendations . 132 C.1 Overview 132 C.2 Differences . 132 Annex D (informative) Performa
28、nce issues 135 D.1 Introduction . 135 D.2 Performance components . 136 D.3 Factors affecting frame rejection rate 136 D.3.1 Bit synchronization factor 136 D.3.2 CLTU Start Sequence factors . 137 D.3.3 BCH Codeblock Factor . 138 D.3.4 Tail Sequence factor . 140 BS EN 16603-50-04:2014EN 16603-50-04:20
29、14 (E) 7 D.3.5 Frames and CLTUs . 141 D.4 Factors affecting frame undetected error rate . 143 Annex E (informative) Mission configuration parameters . 147 E.1 Introduction . 147 E.2 Parameters of a physical channel . 147 E.2.1 Overview . 147 E.2.2 Fixed parameters 147 E.2.3 Length of the acquisition
30、 sequence . 147 E.2.4 Physical layer operation procedure . 148 E.2.5 Transfer Frame Version Number . 148 E.2.6 Maximum length of a TC Transfer Frame 148 E.2.7 Virtual channels 148 E.2.8 Use of the expedited service . 148 E.2.9 Multiplexing parameters 148 E.3 Parameters of a virtual channel 149 E.3.1
31、 Overview . 149 E.3.2 Spacecraft Identifier and Virtual Channel Identifier 149 E.3.3 Maximum length of a TC Transfer Frame 149 E.3.4 FOP-1 parameters 149 E.3.5 CLCW reporting rate . 149 E.3.6 Status Field of CLCW 149 E.3.7 Fixed parameters 149 E.3.8 FARM-1 sliding window parameters 150 E.3.9 Use of
32、TC Segments . 150 E.3.10 Parameters of a virtual channel with TC Segments . 150 E.3.11 Parameters of a virtual channel without TC Segments 150 E.4 Parameters of a MAP . 151 E.4.1 Overview . 151 E.4.2 MAP Identifier . 151 E.4.3 Use of the blocking function 151 E.4.4 Segmentation function 151 E.5 Para
33、meters for packet types . 152 E.5.1 Overview . 152 E.5.2 Valid packet version numbers . 152 Bibliography . 153 BS EN 16603-50-04:2014EN 16603-50-04:2014 (E) 8 Figures Figure 3-1: numbering convention 15 Figure 4-1: Layers and sublayers specified in this Standard . 17 Figure 5-1: TC Segment . 21 Figu
34、re 5-2: Example of blocking of packets 25 Figure 5-3: Example of segmentation of a user data unit 28 Figure 6-1: TC Transfer Frame format 36 Figure 6-2: Format of a CLCW . 44 Figure 7-1: COP-1 sequence variables . 55 Figure 7-2: FARM sliding window concept 67 Figure 7-3: State table format . 89 Figu
35、re 7-4: Actions for look for directive . 94 Figure 7-5: Actions for look for FDU . 95 Figure 7-6: FOP-1 state transitions for main protocol . 105 Figure 7-7: FOP-1 state transitions for initialisation protocol . 106 Figure 7-8: FOP-1 state transitions . 107 Figure 7-9: FARM-1 state transitions 110 F
36、igure 8-1: BCH codeblock format . 112 Figure 8-2: Format of a CLTU . 113 Figure 8-3: Bit pattern of the Start Sequence 113 Figure 8-4: Bit transition generator logic diagram . 116 Figure 8-5: (63,56) Modified BCH code generator 117 Figure 8-6: State diagram for the channel (receiving end) 119 Figure
37、 9-1: Sequence of CMMs comprising PLOP-2 125 Figure 9-2: Sequence of CMMs comprising PLOP-1 126 Figure A-1 : Encoder 127 Figure A-2 : Decoder 128 Figure D-1 : Frame rejection probability, PFY, in SEC mode using PLOP-2 . 143 Figure D-2 : Probability of undetected error in a frame in SEC mode 146 Tabl
38、es Table 6-1: Sending-end procedures in the transfer sublayer 34 Table 6-2: Receiving-end procedures in the transfer sublayer 35 Table 6-3: Combined Bypass Flag and Control Command Flag . 38 Table 6-4: Fields in a CLCW 43 Table 7-1: COP-1 interfaces . 70 BS EN 16603-50-04:2014EN 16603-50-04:2014 (E)
39、 9 Table 7-2: Signals for management interface . 71 Table 7-3: FOP-1 directive types and qualifiers 73 Table 7-4: Reasons for an Alert notification 75 Table 7-5: Signals for sequence-controlled service data transfer interface . 78 Table 7-6: Signals for expedited service data transfer interface 80 T
40、able 7-7: Signals for the interface of FOP-1 to the lower procedures 84 Table 7-8: FOP-1 state table 98 Table 7-9: FARM-1 state table 108 Table 8-1: Channel states (receiving end) 118 Table 8-2: Channel events (receiving end) . 119 Table 9-1: Carrier modulation modes . 123 Table B-1 : Field name dif
41、ferences from ESA-PSS-04-107 131 Table B-2 : Names with “Communications” or “Command” . 131 Table C-1 : Name differences from CCSDS recommendations 134 Table D-1 : Probability of not recognizing the Start Sequence 138 Table D-2 : Meaning of decoding values 138 Table D-3 : Decoding cases in SEC mode
42、138 Table D-4 : Probability of codeblock rejection for a CLTU during decoding in SEC mode . 140 Table D-5 : Parity and Syndrome when Tail Sequence has errors 141 Table D-6 : Probability of missing the Tail Sequence 141 Table D-7 : Frame rejection probability, PFY(PLOP-2) 142 Table D-8 : Sources of u
43、ndetected errors (SEC mode). 143 Table D-9 : Probability of n errors occurring in a codeblock 144 Table D-10 : Error detection performance when decoding a codeblock in SEC mode 144 Table D-11 : Probability of undetected error in a frame, SEC mode, with CRC . 145 BS EN 16603-50-04:2014EN 16603-50-04:
44、2014 (E) 10 Foreword This document (EN 16603-50-04:2014) has been prepared by Technical Committee CEN/CLC/TC 5 “Space”, the secretariat of which is held by DIN. This standard (EN 16603-50-04:2014) originates from ECSS-E-ST-50-04C. This European Standard shall be given the status of a national standa
45、rd, either by publication of an identical text or by endorsement, at the latest by March 2015, and conflicting national standards shall be withdrawn at the latest by March 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN
46、and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This document has been developed to cover specifically space systems and has th
47、erefore precedence over any EN covering the same scope but with a wider domain of applicability (e.g. : aerospace). According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulg
48、aria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tu
49、rkey and the United Kingdom. BS EN 16603-50-04:2014EN 16603-50-04:2014 (E) 11 1 Scope This Standard specifies the data structures and protocols for a telecommand space data link and the procedure for physical layer operation. Usually, the source of data on a telecommand space data link is located on the ground and the receiver is located in space. However, the Standard may also be used for space-to-space telecommand data links. Further provisions and guidance on the application of this standard can be found, respectively, in the following documents: The higher level standard
