EN 16603-50-04:2014

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Vesoljska tehnika - Vesoljske podatkovne povezave - Protokoli za daljinsko vodenje, sinhronizacijo in kodiranje kanalovRaumfahrttechnik - Telekommando-Protokolle, -synchronisation und -kanalkodierungIngénierie spatiale - Liaisons de données spatiales - Protocoles, synchronisation et codage canal des liaisons télécommandeSpace engineering - Space data links - Telecommand protocols, synchronization and channel coding49.090On-board equipment and instruments33.040.40Podatkovna komunikacijska omrežjaData communication networksICS:Ta slovenski standard je istoveten z:EN 16603-50-04:2014SIST EN 16603-50-04:2015en01-januar-2015SIST EN 16603-50-04:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16603-50-04
September 2014 ICS 33.040.40; 49.090; 49.140
English version
Space engineering - Space data links - Telecommand protocols, synchronization and channel coding
Ingénierie spatiale - Liaisons de données spatiales - Protocoles, synchronisation et codage canal des liaisons télécommande
Raumfahrttechnik - Telekommando-Protokolle, -synchronisation und -kanalkodierung This European Standard was approved by CEN on 25 April 2014.
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 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 language 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 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, Turkey and United Kingdom.
CEN-CENELEC Management Centre: Avenue Marnix 17, 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 E SIST EN 16603-50-04:2015

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
Tables 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 SIST EN 16603-50-04:2015

Table B-1 : Field name differences 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. 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 undetected 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
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 ECSS-E-ST-50 “Communications”, which defines the principle characteristics of communication protocols and related services for all communication layers relevant for space communication (physical- to application-layer), and their basic relationship to each other.
• The handbook ECSS-E-HB-50 “Communications guidelines”, which provides information about specific implementation characteristics of these protocols in order to support the choice of a certain communications profile for the specific requirements of a space mission.
Users of this present standard are invited to consult these documents before taking decisions on the implementation of the present one. This standard may be tailored for the specific characteristics and constraints of a space project in conformance with ECSS-S-ST-00.
EN reference Reference in text Title EN 16601-00-01 ECSS-S-ST-00-01 ECSS system - Glossary of terms
CCSDS 135.0-B-3 Issue 3, October 2006 Space Link Identifiers – Blue Book SIST EN 16603-50-04:2015

The transition between two consecutive mission phases can cause an interruption of the telecommand data link services. 3.2.2 octet group of eight bits NOTE 1 The numbering for octets within a data structure starts with 0. NOTE 2 Refer to 3.4 for the convention for the numbering of bits. 3.2.3 packet variable-length data structure consisting of higher layer user data encapsulated within standard header information 3.2.4 static unchanged within a specific virtual channel NOTE 1 This Standard contains requirements on the invariability, throughout one or all mission phases, of certain characteristics of the data structures specified in it. NOTE 2 For virtual channel refer to 4.7. 3.2.5 physical layer operation procedure procedure in the physical layer to activate and deactivate the physical communications channel by invoking RF carrier and modulation techniques SIST EN 16603-50-04:2015

AC, CB and BD frames are defined in Table 6-3. SIST EN 16603-50-04:2015

Figure 3-1: numbering convention 3.4.2 Most significant bit When an N-bit field is used to express a binary value (such as a counter), the most significant bit is the first bit of the field, i.e. bit 0 (see Figure 3-1). 3.4.3 Use of capitals for the names of data structures and fields In this Standard initial capitals are used for the names of data structures and fields. This enables field names to be easily identified in the surrounding text.
For example, the field Frame Length is easier to see than frame length in text containing words such as frame and length. It also prevents ambiguity over where the name begins and ends.
In general, the procedures, protocols and functions defined in this Standard are not concerned with the format, contents or applications of the higher layer data units. The only exception is the blocking function of the segmentation sublayer: the higher layer data units which use this function are restricted to certain packet types. 4.2 Protocol profiles Figure 4-1 illustrates the following: • The relationship of the layers and sublayers specified in this Standard. • The data structures passed between the peer entities. The data structures are introduced in the overview clauses 4.3 to 4.5. The protocol profile for a project can differ from the profile represented by Figure 4-1.
Figure 4-1: Layers and sublayers specified in this Standard 4.3 Segmentation sublayer The TC segment contains fields to support two of the functions of the segmentation sublayer:
• the segmentation function, and
• a multiplexing function.
The segmentation function breaks long data units into smaller portions so that they are consistent with the limited length of the frames in the transfer sublayer. At the receiving end, the segmentation function reassembles the portions into the original data units. The segmentation sublayer also includes a blocking function for packets so that multiple packets can be carried in a frame. Clause 5 provides the specification of the segmentation sublayer and of the TC segment. SIST EN 16603-50-04:2015

The procedures are defined in Clause 6, which also includes the definition of the TC Transfer Frame. The transfer sublayer includes the communications operation procedure (COP-1), which operates the transmission protocol of the transfer sublayer. The detailed specification of COP-1 is given in Clause 7. COP-1 supports two service types:
• the sequence-controlled service, and
• the expedited service. COP-1 uses protocol status information which is passed from the transfer sublayer at the receiving end to the transfer sublayer at the sending end. The information is contained in a communications link control w
...