Space Link Extension - Service Management - CCSDS

DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT
If the Invoker does not receive a validated result (successful or failed) before the disposition
timer for that operation expires, the Invoker shall determine the disposition of the operation
by bilaterally defined means (e.g., contact the Performer by voice) and complete the
operation procedure.
If the Invoker receives an AcknowledgedReturn after it receives a Successful-
Return or FailedReturn for the same operation, or after the expiration of the
disposition timer for that operation, the Invoker ignores the AcknowledgedReturn.
NOTE – The failure by the Invoker to validate an operation return or correlate an
UnrecognizedMessageSetResponse or InvalidMessageResponse
from the Performer will eventually result in the expiration of the associated
disposition timer, which results in the Invoker determining the status of the
operation by other means.
Upon receipt of an UnrecognizedMessageSetResponse, the Performer performs
exception response validation in accordance with the Receive and Validate SLE-SM Exception
Response activity subgroup of the Document Exchange Protocol activity group specified in
3.3. The Performer attempts to correlate the contents of the syntactically correct
UnrecognizedMessageSetResponse with a return that has been sent by the Performer.
If the UnrecognizedMessageSetResponse can be correlated to a return, the Performer
informs the Invoker (by other means) of the content of the return. The Performer may also
perform local functions to determine why the return was not validated by the Invoker.
3.4.2.3 Sequence Diagram
Figure 3-21 is the sequence diagram for the three-phase operation procedure pattern. It is
composed of multiple instances of the Send Message sequence specified in figure 3-4.
CCSDS 910.11-R-2 Page 3-50 March 2008