Space Link Extension - Service Management - CCSDS

DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT
3.3.2.4.3 Exception Response Processing External to the Document Exchange Protocol
Operation-level processes external to the document exchange protocol use the diagnostic
information contained in the UnrecognizedMessageSetResponse and Invalid-
MessageResponse messages to modify the local state of the affected operations and
possibly take other actions. The nature of these other actions is determined by the operation,
the message, and/or the role of the Sender in the operation, and are defined in further detail
in the procedure patterns in 3.4 and the operation specifications in sections 4 through 7.
3.3.2.5 Sequence Diagrams
The message set is the primary unit of exchange for the document exchange protocol.
Figure 3-3 is the sequence diagram for the SLE-SM Document Exchange Protocol. Note that
at the document exchange protocol level, SLE-SM operation messages are unrelated. For
example, the SLE-SM document exchange protocol does not associate operation returns with
the invocations that trigger them. Such associations among messages exist within the
operation procedures, the patterns for which are defined in 3.4 and the concrete instantiations
of which are defined in sections 4 through 7. The SLE-SM Document Exchange Protocol
sequence diagram is a parameterized, reusable diagram.
Whereas the message set is the unit of interest from the perspective of the document
exchange protocol, it is the individual messages that are contained within a message set that
are important to the SLE-SM operations themselves. Figure 3-4 is the sequence diagram for
the transmission of a single SLE-SM message within a message set. As can be seen, the
Send Message sequence diagram uses the SLE-SM Document Exchange Protocol sequence
diagram of figure 3-3. The SLE-SM Send Message sequence diagram is in turn
parameterized and reusable, and serves as a component of sequence diagrams for the
procedure patterns defined in 3.4.
3.3.2.6 Activity Diagram
Figure 3-5 is the activity group diagram for the SLE-SM Document Exchange Protocol. The
Document Exchange Protocol activity group incorporates two lower-level activity groups,
Receive and Validate SLE-SM Message Set (figure 3-6) and Receive and Validate SLE-SM
Exception Response (figure 3-7). The SLE-SM Document Exchange Protocol activity group
is a component of the activity diagrams for the procedure patterns defined in 3.4.
CCSDS 910.11-R-2 Page 3-9 March 2008