Space Link Extension - Service Management - CCSDS

DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT
3.4.1.6.2 Performer Requirements for Two-Phase Operation Procedures
Table 3-29: Performer Requirements for the Two-Phase Operation Procedures
2PP-0101
2PP-0102
2PP-0103
2PP-0104
2PP-0105
The Performer shall receive and validate the operation Invocation in conformance with the Receiver
Requirements for the SLE-SM Document Exchange Protocol as defined in 3.3.3.2.
If the Invocation passes message set validation as specified in 2PP-0101, the Performer shall:
a) initialize a disposition timer based on the value of the messageTimestamp of the operation
invocation plus the value of the appropriate two-phase timeout parameter of the referenced Service
Agreement (see Note below), where:
1) if the urgent parameter of the Invocation is set to ‘true’, the value of the urgent timeout
parameter for that operation shall be used;
2) if the urgent parameter of the Invocation is set to ‘false’, the value of the routine
timeout parameter for that operation shall be used; and
b) perform operation-specific service management validation on the Invocation:
1) if the Invocation passes service management validation, the Performer shall attempt to
perform the operation prior to the expiration of the local disposition timer;
2) if the Invocation fails service management validation, the Performer shall cease interpreting
and acting upon the Invocation, generate a FailedReturn*, and transmit the
FailedReturn* to the Invoker’s message set port in accordance with the Sender
Requirements for the SLE-SM Document Exchange Protocol.
NOTE – See 3.4.1.2, Note 1 for further considerations on the setting of the disposition timer.
a) If the Performer successfully completes the operation prior to the expiration of the disposition
timer, the Performer shall transmit a SuccessfulReturn to the message set port of the
Invoker in accordance with the Sender Requirements for the SLE-SM Document Exchange
Protocol.
b) If the invoked operation cannot be successfully completed or failed for other reasons by the
expiration of the disposition timer, the Performer shall terminate the operation and return a
FailedReturn* with diagnostic value ‘operation timeout’.
The Performer shall validate exception responses received from the Invoker on the exception response
port in accordance with the Sender Requirements for the SLE-SM Document Exchange Protocol as
defined in 3.3.3.1.
For each syntactically valid UnrecognizedMessageSetResponse received on the exception
response port, the Performer shall attempt to correlate the content of the
UnrecognizedMessageSetResponse with a return that was sent. If correlation is successful, the
Performer shall notify the Invoker by other means of the contents of any return that was contained in a
message set for which a valid UnrecognizedMessageSetResponse is received. The Invoker is not
required to further interpret or act upon any UnrecognizedMessageSetResponse that cannot be
correlated.
3.4.2 THREE-PHASE OPERATION PROCEDURE PATTERN
3.4.2.1 Purpose
The three-phase operation procedure pattern is used by SLE-SM operations that may require
an extended period of time before they can be validated and/or performed.
The three-phase operation procedure pattern specifies the messages exchanged between
Invoker and Performer associated with a three-phase operation, the activities of the Invoker
and Performer in response to those messages, the time constraints under which those
CCSDS 910.11-R-2 Page 3-46 March 2008