For fdu s1 not applicable s1 not applicable e3 s1

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Unformatted text preview: able distinguishes among many events, all of which should never occur. If one of these situations is detected, an ‘Alert’ notification is passed to the Higher Procedures and FOP-1 enters the ‘Initial’ State (S6). Except for Alert[term] after a ‘Terminate AD Service’ Directive, all these traps are grouped under ‘Exceptions’ in figure 5-2. The ‘Exceptions’ also include Suspend. A detailed summary of the way FOP-1 moves between all States is given in figure 5-3. CCSDS 232.1-B-2 Page 5-15 September 2010 State Name RETRANSMIT WITHOUT WAIT Last CLCW showed: Lockout Flag = 0, Retransmit Flag = 1, Wait Flag = 0 RETRANSMIT WITH WAIT Last CLCW showed: Lockout Flag = 0, Retransmit Flag = 1, Wait Flag = 1 INITIALIZING WITHOUT BC FRAME Initiate AD Service (with CLCW check) Directive received and ‘clean’ status not seen since INITIALIZING WITH BC FRAME Type BC frame transmitted and ‘clean’ status not seen since S1 S2 S3 S4 S5 Ignore Alert [synch] Alert [synch] Confirm, Cancel Timer Ignore Confirm, Release copy of type BC frame, Cancel Timer (S1) Remove acknowledged frames from Sent_Queue, Cancel Timer, Look for FDU (S6) Remove acknowledged frames from Sent_Queue, Cancel Timer, Look for FDU (S6) Remove acknowledged frames from Sent_Queue, Cancel Timer, Look for FDU (S1) Not Applicable (S1) Not Applicable E3 (S1) Alert [CLCW] (S1) Alert [CLCW] (S1) Alert [CLCW] Alert [CLCW] Alert [CLCW] E4 (S6) Alert [synch] (S6) Alert [synch] (S6) Alert [synch] (S6) Alert [synch] (S6) Ignore (S6) Ignore (S6) (S6) (S6) (S6) (S5) (S6) Main Feature State State Number Page 5-16 Event Conditions CLCW Lockout arrives Flag = 0 formed from a valid COP-1 pattern N(R) = Retransmit V(S) Flag = 0 i.e.: Valid N(R) and all outstanding type AD frames acknowledged Wait Flag = 0 N(R) NN(R) i.e.: no new frames acknowledged N(R) < > E2 NN(R) i.e.: some new frames acknowledged Wait Flag = 1 September 2010 Retransmit Flag = 1 Event Number = E1 ACTIVE Last CLCW of showed: Lockout Flag = 0, Retransmit Flag = 0, Wait Flag = 0 INITIAL Not configured for AD Service S6 (S6) Ignore (S6) Ignore RECOMMENDED STANDARD FOR COMMUNICATIONS OPERATION PROCEDURE-1 CCSDS 232.1-B-2 Table 5-1: FOP-1 State Table (Part 1) State Name...
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This document was uploaded on 03/06/2014.

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