3GPP TSG SA WG5 (Telecom Management) Meeting #97
20-24 October 2014; Venice, Italy
revision of S5-121abc
Source:
Intel, AT&T, KDDI, CMCC?, Huawei?
Title:
pCR VNF expansion use cases
Document for:
Approval
Agenda Item:
6.6.3 – Study on Network Management of Virtualized Networks
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S5- 145232
Decision/action requested
Discuss and approve on the text proposal.
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References
[1]
ETSI GS NFV-MAN 001, “Network Function Virtualization (NFV) Management and Orchestration”
[2]
3GPP TR 32.842, “Study on network management of virtualized networks”
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Rationale
This contribution proposes the use cases of VNF expansion to support the operations required by the NFV lifecycle
management [1]. It covers trigger points of NM, VNFM, and EM that were described in NFV MANO [1] to initiate the
VNF lifecycle management.
It proposes to include these use cases into TR 32.842 [2].
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Detailed proposal
1st Modified Section
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Management use cases
5.y
Use cases: VNF expansion
5.y.1
Introduction
VNF expansion refers to the addition of capacity that is deployed for a VNF, and may result in a scale-out of a VNF by
adding VNFCs to support more capacity or may result in a scale-up of virtualized resources in existing VNF/VNFCs
(see Annex B.4.4.1, B.4.4.2 in [2]).
The goal is to show how VNF expansion operation can add capacity to a VNF, when it is detected that the VNF
instance is overloaded
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5.y.2
Pre-conditions
NM, EM, or VNFM detects that the VNF is overloaded, and determines to trigger the VNF expansion.
5.y.3
Description
1. VNF, EM, or NM sends a request to VNFM to initiate VNF expansion.
2. VNFM requests VIM to instantiate and start the VMs and the relevant networking resources required for VNF
expansion.
3. VIM acknowledges successful operation to VNFM when the resource expansion is done.
4. VNFM configures VNF with data specific for VNF expansion, and notifies the EM that an existing VNF has
been updated with additional capacity.
5.y.4
Post-conditions
VNFM may notify EM or NM that an existing VNF has been updated with additional capacity, if it is triggered by EM
or NM.
End of Modified Section
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