The following signal shall be issued by the lower

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Unformatted text preview: ly) also cancel ongoing processes for Type-AD and BC Transfer Frames in the Channel Coding and Synchronization entity. The following signal shall be issued by the Lower Procedures to FOP-1 (the items in parentheses are parameters of the signal): Response (GVCID, Response Type). The ‘Response’ signal shall be used for the purpose of flow control between FOP-1 and the Lower Procedures, and shall be issued by the Lower Procedures for every Transfer Frame given by FOP-1 when the Transfer Frames have been accepted or rejected. The values of the parameter ‘Response Type’ are: a) AD_Accept (when a Type-AD Transfer Frame is accepted); b) AD_Reject (when a Type-AD Transfer Frame is rejected); c) BC_Accept (when a Type-BC Transfer Frame is accepted); d) BC_Reject (when a Type-BC Transfer Frame is rejected); e) BD_Accept (when a Type-BD Transfer Frame is accepted); f) BD_Reject (when a Type-BD Transfer Frame is rejected). 3.3 3.3.1 INTER-PROCEDURE INTERFACES AT THE RECEIVING END INTERNAL ORGANIZATION OF PROTOCOL ENTITY NOTE – Figure 3-2 shows the internal organization of the TC Space Data Link Protocol entity at the receiving end, together with the interfaces with the other protocols used with the TC Space Data Link Protocol. In figure 3-2, the set of procedures performed below FARM-1 is collectively called the Lower Procedures, and the set of procedures performed above FARM-1 is collectively called the Higher Procedures. CCSDS 232.1-B-2 Page 3-6 September 2010 RECOMMENDED STANDARD FOR COMMUNICATIONS OPERATION PROCEDURE-1 User (Higher Layer Protocol) Service Data Units TC Data Link Protocol Higher Procedures Frame Acceptance and Reporting Mechanism-1 (FARM-1) Lower Procedures CLCWs Protocol Used in the Opposite Direction Transfer Frames Channel Coding and Synchronization Figure 3-2: Internal Organization of Protocol Entity (Receiving End) The Lower Procedures shall perform the Frame Validation Check against Transfer Frames received from the underlying entity of Channel Coding and Synchronization, demultiplex Transfer...
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