Frequency telecommand transfer frame virtual channel

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Unformatted text preview: COP-1 IDENTIFIER MULTIPLEXER ACCESS POINT MOST SIGNIFICANT BIT THE OBSERVED VALUE OF V(R) CONTAINED IN ONE CLCW TRANSMITTED FRAME SEQUENCE NUMBER QUALITY OF SERVICE RADIO FREQUENCY TELECOMMAND TRANSFER FRAME VIRTUAL CHANNEL RECEIVER_FRAME_SEQUENCE_NUMBER CCSDS 202.0-B-2 Page A-2 CCSDS HISTORICAL DOCUMENT November 1992 CCSDS HISTORICAL DOCUMENT CCSDS RECOMMENDATION FOR TELECOMMAND: DATA ROUTING SERVICE TERMINOLOGY CODING LAYER: The top layer of the Channel Service, specified in Reference [4]. This is the layer immediately below the Transfer layer. COMMAND LINK CONTROL WORD (CLCW): The CLCW is the protocol data unit for TC reporting via telemetry from the FARM back to the FOP. The CLCW resides wholly within the Transfer layer, though it does include a few parameters describing the readiness state of lower layers, which aid the efficient operation of the COP. The CLCW does not perform any reporting service for the Segmentation layer. COMMAND OPERATION PROCEDURE (COP): A sequence of procedural activities designed to assure the reliable, error-controlled delivery of a TC Transfer Frame across the Transfer layer. The COP consists of a Frame Operation Procedure (FOP) operating within the sending end of the layer and a Frame Acceptance and Reporting Mechanism (FARM) operating within the receiving end of the layer. COP-1 = Sequential acceptance and retransmission with frame sequence numbering. CONTROL COMMAND: A special Type-B TC Frame which carries control instructions in its Data Field to set up the internal operating parameters of the FARM. CONTROL INSTRUCTION: Information that is required to set up a TC System layer to support the handling of telecommands. DATA START: A signal from the Coding layer which becomes “true” to notify the Transfer layer that valid decoded data octets are being transferred. DATA STOP: A signal from the Coding layer corresponding to Data Start becoming “false”, which notifies the Transfer layer that no more valid data octets are being transferre...
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