Space Link Extension - Service Management - CCSDS

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DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT scope of the controlling Service Agreement, that all service management information that is prerequisite to the successful performance of the operation is in place, and that all resources required to successfully perform the operation are available (or expected to be available). 1.7.1.5.13 Space Link Session Transfer Service A transfer service that is active concurrent with a space link session, such that all data sent via a forward transfer service is transmitted across the forward space link with minimal delay, and data that is received via a return space link is transferred with minimal delay. The standard Space Link Session (SLS) Transfer Services include the forward SLE transfer services and the return SLE transfer services operating in timely online delivery mode. The MDOS and the Complex may also bilaterally define and implement non-CCSDS-standard SLS transfer services. NOTE – The standard SLS Transfer Services will also include forward Cross Support Transfer Services (CSTSes) and return CSTSes operating in the timely delivery mode. 1.7.1.5.14 Retrieval Transfer Service A return transfer service that retrieves space link data from a data store. The data may be retrieved anytime from the beginning of the associated space link session is still active until the end of the scheduled service period of the retrieval transfer service instance, which may be any specified time period up to the end of the lifetime of the Service Agreement. The standard Retrieval Transfer Services include the forward SLE transfer services and the return SLE transfer services operating in complete online and offline delivery modes. The MDOS and the Complex may also bilaterally define and implement non-CCSDS-standard retrieval transfer services. NOTE – The standard Retrieval Transfer Services will also include return Cross Support Transfer Services (CSTSes) operating in the complete delivery mode. 1.7.2 NOMENCLATURE The following conventions apply throughout this Recommended Standard: a) the words ‘shall’ and ‘must’ indicate a binding and verifiable specification; b) the word ‘should’ indicates an optional, but desirable, specification; c) the word ‘may’ indicates an optional specification; d) the words ‘is,’ ‘are,’ and ‘will’ indicate statements of fact. CCSDS 910.11-R-2 Page 1-10 March 2008
DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT 1.8 CONVENTIONS 1.8.1 THE UNIFIED MODELING LANGUAGE The Unified Modeling Language (UML) diagrams used in this Recommended Standard (including class diagrams, sequence diagrams, activity diagrams, and state machine diagrams) follow the notation, semantics and conventions imposed by the Version 2.0 UML specification of the Object Management Group (OMG). Annex D provides an overview of the UML 2.0 diagramming conventions that are used in this Recommended Standard. 1.8.2 SPECIFICATION OF SERVICE OPERATIONS 1.8.2.1 General The typographical convention for a service operation is specified in 1.8.4.2, ‘Operation Names’. The specification of each operation is divided into subsections as follows: 1.8.2.2 Purpose Subsection This subsection provides a brief text description of the purpose of the operation. 1.8.2.3 Procedure Subsection The Procedure subsection specifies the sequencing and behavior of an operation. It defines the associated messages and describes the relationship of these messages to the operation. UML activity and sequence diagrams are used to describe procedural logic between the UM and CM. The typographical convention for a message is specified in 1.8.4.3, ‘Message Names’. 1.8.2.4 Requirements Subsection 1.8.2.4.1 General The Requirements subsection specifies the requirements for UM and/or CM in executing the operation. This section will reference messages, parameters, data sets, and composition requirements. The typographical conventions for these references are listed in 1.8.3. 1.8.2.4.2 Identification of Service Management Validation and Operation Performance Requirements All UM and CM operations conform to operation procedure patterns, as defined in section 3. These operation procedure patterns contain abstractly defined activities for performing service management validation and performing the operation itself. The concrete definition CCSDS 910.11-R-2 Page 1-11 March 2008
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Space Link Extension - Service Management - CCSDS

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