Page 702 - Cloud computing: From paradigm to operation

3 XaaS

– oss4: This reference point covers interactions between the OSS-NS and OSS-NF. This includes
interactions related to network functions lifecycle management, network functions fault and
performance management, network functions usage management and network functions inventory
management.

– oss5: This reference point covers interactions between the OSS-NS and OSS-CCS. This includes
interactions related to virtual resources life cycle management, virtual resources fault and
performance management, virtual resources usage management and virtual resources inventory
management.
– oss6: This reference point covers interactions between the OSS-NF and OSS-CCS. This includes
interactions related to virtual resources life cycle management, virtual resources fault and
performance management, virtual resources usage management and virtual resources inventory
management.
The external reference points illustrated in Figure A.1 are listed as follows:
– oss-bss1: This reference point covers interactions between BSS functional components for NaaS
products (BSS-NaaS products) and OSS components for NaaS services (OSS-NaaS). This includes for
example NaaS service order interactions between the BSS account management functional
component and the OSS-NaaS following a NaaS CSC order for a NaaS product.

– oss-rl1: This reference point covers interactions between the OSS-NC and a network controller
(e.g., a SDN controller). This includes interactions related to virtualized network connectivity life
cycle management, fault and performance management, usage management and inventory
management. In this case the OSS-NC can be viewed as a set of SDN applications as per [ITU-T
Y.3300], [ITU-T Y.3302] and the interactions being carried over the SDN Application Control Interface
(ACI) reference point.
– oss-rl2: This reference point covers interactions between the OSS-NaaS and a VNF. This includes
interactions related to the network functions' configuration management and network functions'
fault and performance management from a NaaS service perspective.
– oss-rl3: This reference point covers interactions between the OSS-NF and a VNF. This includes
interactions related to the network functions' configuration management and network functions'
fault and performance management.
– oss-rl4: This reference point covers interactions between the OSS-CCS with the NaaS cloud
infrastructure domain. This includes interactions related to the specific assignment of virtual
resources in response to resource allocation requests and the exchange of virtual resources state
information.

– oss-lg1: This reference point covers interactions between the OSS-NaaS with a legacy OSS system
that manages legacy networks including PNFs.
– oss-dev1: This reference point covers interactions between the OSS-NaaS with Development
Functions for NaaS products and Services. This include interactions related the distribution of
developed NaaS services in order to make them available in the service catalogue functional
component within the OSS-NaaS.

– bss-dev1: This reference point covers interactions between the BSS-NaaS products with
development functions for NaaS products and services. This includes interactions related to the
distribution of developed NaaS products in order to make them available in the product catalogue
functional component within the BSS-NaaS products.
NOTE 1 – In some cases, interaction of the OSS-NaaS with a PNF may be realized through the OSS-NC using either oss1
reference point or oss2 plus oss3 reference points. In such case the OSS-NC will typically interact with a Network
Controller (e.g., a SDN controller or the NMS/EMS that controls and manages the PNF).
NOTE 2 – The OSS-Analytics box shown in Figure A.1 is for further study. Main objective of the OSS-Analytics is to support
network analytics functionalities as described in clause 7.3. Interactions of the OSS-analytics with other OSS components
needs further study.

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