B21 coding layer sending end service specification 1

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Unformatted text preview: B2.1 CODING LAYER: SENDING END SERVICE SPECIFICATION (1) INPUTS From the layer above: (a) “Input Data” from the Data Routing Service, to be included in a single CLTU. (b) Control instructions. From the layer below: (c) (2) Status of the physical telecommand channel (i.e., report from the Physical layer). OUTPUTS To the layer above: (a) Status of the physical telecommand channel. To the layer below: (b) (c) (3) Command Link Transmission Units (CLTUs). Control instructions. INTERNAL FUNCTIONS (a) Conditions Input TC Data by randomizing it if used by a mission. (b) Adds fill as necessary to complete the last codeblock of the CLTU (may be done before or after randomizing). (c) Encodes the Input TC Data or conditioned Input TC Data into TC Codeblocks. (d) Forms the TC Codeblocks into a CLTU by adding the Start and Tail Sequence. CCSDS 201.0-B-3 Page B-5 June 2000 CCSDS RECOMMENDATION FOR TELECOMMAND: CHANNEL SERVICE B2.2 CODING LAYER: RECEIVING END SERVICE SPECIFICATION (1) INPUTS From the layer below: (a) (b) Symbol clock (if required). (c) (2) Synchronize...
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This document was uploaded on 03/06/2014.

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