Goal

According to the network deployment policy, 3GPP system use the policy to deploy the corresponding network.

Actors and Roles

Policy MnS consumer is responsible for creating the IMS deployment policy and evaluating the policy execution.

Policy MnS producer is responsible for executing the IMS deployment policy and can store the policy.

Telecom resources

3GPP management system, NFV MANO (NFVO, VNFM)

Assumptions

1. The operator has two types’ DCs, core DCs are centralized in some individual region and edge DCs are distributed in most cities.

2. The operator determines core DC supports the control plane network function which handles signalling, determines CSCF should be deployed in core DC.

3. The operator determines edge DC supports the media plane or forwarding plane network function which handles session service and data service, determines SBC should be in edge DC.

Pre conditions

1. The operator designs the IMS network deployment requirement and need deploy the network based on the requirement.

2. Management systems (i.e. 3GPP management system and NFV-MANO system) are running normally.

Begins when

The Policy MnS consumer requests the Policy MnS producer to create the deploy policy (IMS network and determine CSCF should be deployed in core DC and SBC should be in edge DC).

Step 1 (M)

The Policy MnS consumer activates the policy and notifies related Policy MnS producer.

Step 2 (M)

The Policy MnS producer follows the policy to design the IMS network then the IMS network is instantiated by the management system.

Step 3 (M)

The Policy MnS producer informs the Policy MnS consumer the policy has been executed.

Ends when

The Policy MnS consumer evaluates the effectiveness of the policy execution if needed. The Policy MnS consumer evaluates the effectiveness of the policy according to the result of the policy execution. In this case the effectiveness is CSCF(s) and SBC(s) in the IMS network are deployed in appropriate DCs and on appropriate hardware resource.

Exceptions

One of the steps identified above fails.

Post Conditions

The IMS network is correctly configured and normally running.

Traceability

REQ-POM_ND-CON-1

Goal

According to the network deployment policy, 3GPP system use the policy to deploy the corresponding network.

Actors and Roles

Policy MnS consumer is responsible for creating the IMS deployment policy and evaluating the policy execution.

Policy MnS producer is responsible for executing the IMS deployment policy and can store the policy.

Telecom resources

3GPP management system, NFV MANO (NFVO, VNFM),

Assumptions

The operator determines to deploy one IMS network with 3 load sharing CSCFs.

The operator determines it is not allowed to deploy more than 2 CSCFs in the same core DC.

Pre conditions

1. The operator designs the IMS network deployment requirement and need deploy the network based on the requirement.

2. Management systems (i.e. 3GPP management system and NFV-MANO system) are running normally.

Begins when

The Policy MnS consumer requests the Policy MnS producer to create the policy(deploy one IMS network with 3 load sharing CSCFs, it is not allowed to deploy more than 2 CSCFs in the same core DC).

Step 1 (M)

The Policy MnS consumer activates the policy and notifies related Policy MnS producer.

Step 2 (M)

The Policy MnS producer follows the deployment policy to design the IMS network then the IMS network is instantiated by the management system.

Note: Whether and how NSD or VNFD supports the policy is out of scope of the present document.

Step 3 (M)

The Policy MnS producer informs the Policy MnS consumer the policy has been executed.

The Policy MnS consumer evaluates the effectiveness of the policy execution if needed.

Ends when

The Policy MnS consumer evaluates the effectiveness of the policy execution if needed. The Policy MnS consumer evaluates the effectiveness of the policy according to the result of the policy execution. In this case the effectiveness is all CSCFs in the IMS network are deployed in appropriate DCs.

Exceptions

One of the steps identified above fails.

Post Conditions

The IMS network is correctly configured and normally running.

Traceability

REQ-POM_ND-CON-1

Goal

According to the network deployment policy, 3GPP system use the policy to deploy the corresponding network.

Actors and Roles

Policy MnS consumer is responsible for creating the IMS deployment policy and evaluating the policy execution.

Policy MnS producer is responsible for executing the IMS deployment policy and can store the policy.

Telecom resources

3GPP management system, NFV MANO (NFVO, VNFM),

Assumptions

1. The operator has two types’ DCs, core DCs are centralized in some individual region and edge DCs are distributed in most cities.

2. The operator need deploy IMS network in one region and the EPC network has already been running.

Pre conditions

1. The operator designs the IMS network deployment requirement and need deploy the network based on the requirement.

2. Management systems (i.e. 3GPP management system and NFV-MANO system) are running normally.

3. The Policy MnS producer has the adjacent location information of the data centre(s) and central office(s).

Editor’s note: How the Policy MnS producer gets the adjacent location information is out of scope of the present document.

Begins when

The Policy MnS consumer requests the Policy MnS producer to create the policy(deploy IMS network in one region).

Step 1 (M)

The Policy MnS consumer delivers the policy to Policy MnS producer and activates the policy if needed.

Step 2 (M)

The Policy MnS producer follows the policy to design the IMS network and determine the virtualized SBC location after getting the SAE GW location.

Step 3 (M)

The management systems follow the location constraint to design template (e.g. NSD or VNFD) and instantiate the IMS network.

Ends when

The Policy MnS producer informs the Policy MnS consumer the policy has been executed.

Exceptions

The Policy MnS consumer evaluates the effectiveness of the policy execution if needed. The Policy MnS consumer evaluates the effectiveness of the policy according to the result of the policy execution. In this case the effectiveness is the virtualized SBC is deployed adjacently to the running SAE GW.

Post Conditions

The IMS network is correctly configured and normally running.

Traceability

REQ-POM_ND-CON-1