Space Link Extension - Service Management - CCSDS

DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT
4.8.5.3 Data Set Composition and Relationship Requirements
Table 4-78 defines the data set composition and relationship requirements for the SPC-C
message.
Table 4-78: Data Set Composition and Relationship Requirements for SPC-C
SPCD-3
SPCD-4
The ServicePackageCancelledConfirmation message shall contain one
ServicePackageReference data set.
[syntactic validation]
The servicePackageRef parameter shall contain the same value as the
servicePackageRef parameter in the corresponding SPC-N.
[service management validation]
4.9 SERVICE_PACKAGE_MODIFIED (SPM) OPERATION
4.9.1 PURPOSE
The SERVICE_PACKAGE_MODIFIED (SPM) allows CM to notify UM about minor
modifications applied to a Space Link Session Service Package as a result of changing
conditions at CM. The nature of the modifications is such that CM may continue with a
commitment to provide service that would otherwise necessitate a
SERVICE_PACKAGE_CANCELLED. Examples of the minor modifications are:
– change to a different antenna with equivalent capabilities as that originally selected;
– changes in scheduledSpaceLinkSessionStartTime and scheduledSpaceLink-
SessionStopTime for one or more carriers that are still within the respective space-
LinkSessionStartTimeLead and spaceLinkSessionStartTimeLag constraints of
the effective CREATE_SERVICE_PACKAGE or REPLACE_SERVICE_PACKAGE
operation and continue to meet the needs of the minimumContactDuration.
NOTES
1 This implies that CM retains the information content of the CSP-I or RSP-I that
created the Service Package, in order to be able to effectively implement the SPM
Operation.
2 It is possible via the UM parameterization of the CREATE_SERVICE_PACKAGE
and/or REPLACE_SERVICE_PACKAGE operations to disallow CM from performing
the SERVICE_PACKAGE_MODIFIED Operation; if this is the case, CM has no
choice but to perform a SERVICE_PACKAGE_CANCELLED Operation for the
changed conditions. For example, if the CSP-I specified antennaSelection =
requiredAntennaRef, then if there is a need to change the antenna, CM would
have to cancel rather than modify the Service Package.
CCSDS 910.11-R-2 Page 4-87 March 2008