Space Link Extension - Service Management - CCSDS

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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
DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT 4.9.2 PROCEDURE The procedure for the SPM Operation is a Notified Operation procedure, which follows the notified operation procedure pattern specified in 3.4.3. The SPM Operation involves the exchange of the following messages: – ServicePackageModifiedNotification (SPM-N); – ServicePackageModifiedConfirmation (SPM-C). The sequence and activity diagrams for the SERVICE_PACKAGE_MODIFIED are the notified operation procedure pattern sequence and activity diagrams specified in 3.4.3.3 and 3.4.3.4, respectively, with the argument lists: Sequence Diagram notifiedOperationProcedurePatternSequence {CM, UM, SPM-N, SPM-C} Activity Diagram notifiedOperationProcedurePatternActivity {CM, UM, SPM-N, SPM-C} 4.9.3 REQUIREMENTS 4.9.3.1 UM Requirements for the SERVICE_PACKAGE_MODIFIED Operation Table 4-79: UM Requirements for SPM Operation SPMU-1 SPMU-2 SPMU-3 SPMU-4 SPMU-5 UM shall conform to all Recipient Requirements for Notified Operation Procedures as specified in 3.4.3.6.2. UM shall validate that a received SPM-N conforms to all SPM-N syntactic validation requirements specified in table 4-83, Data Set Composition and Relationship Requirements for the SPM-N. If the SPM-N fails any of the syntactic requirements, UM shall process the message set containing the syntactically invalid SPM-N in accordance with the Recipient Requirements for Notified Operation Procedures as defined in table 3-37. UM shall validate that a received SPM-N conforms to all SPM-N service management validation requirements specified in this table and table 4-83. If the notification fails any of the service management validation requirements, UM shall process the service managementinvalid notification in accordance with the Recipient Requirements for Notified Operation Procedures as defined in table 3-37. If the SPM-N passes all syntactic and service management validation, UM shall update its schedule of operations and internal equipment in accordance with the information conveyed in the SPM-N and send a SPM-C message to CM. [confirm operation] UM shall conform to all SPM-C Data Set Composition and Relationship Requirements when creating and transmitting a SPM-C as specified in table 4-84. CCSDS 910.11-R-2 Page 4-88 March 2008
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Space Link Extension - Service Management - CCSDS

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