Page 242 - 5G Basics - Core Network Aspects

1 Core network aspects

Preconditions

A virtualized network entity is composed of six running VMs.
Operational flows

This operational flow shows scaling out/in.

Figure I.3 – Scaling out/in

1) The resource management system detects that the traffic volume is decreasing, and it asks the
virtualized network entity to shut down the components of the entity running on two VMs.
2) Two VMs in network entity is shut down, and if there is no VM running on a physical server, the
physical server can be shut down.
3) The resource management system detects that the traffic volume is reaching the upper threshold,
it asks the virtualized network entity to boot two VMs.
4) Two VMs in network entity boot, and if there is no available resource on running physical servers, a
new physical server should be booted firstly.

I.3 SAME network slice for MVNO scenario
Descriptions

An MVNO utilizes part of the operator's current network, such as RAN and IP network, but wants to deploy
some other functions independently, such as the gateway (GW), user profile function, IP multimedia
subsystem (IMS) and application servers. The MNO provides SAME network slices to the MVNO to deploy the
specific function elements in virtual manner.

Preconditions
A MVNO wants to deploy some network functions by itself except the shared infrastructure with the
operator. The operator provides a SAME network slice that contains SAME functions, and related resources
like computing, storage, networking, to the MVNO. The MVNO deploys its network functions on the hardware
resource pool of the operator. The MNO is responsible for the management of the MVNO's network.

Operational flows
1) The MVNO asks the operator to provide the network resource with required network performance,
such as bandwidth, session number, quality of service (QoS) level.
2) The operator allocates a SAME network slice to the MVNO that contains SAME functions and related
resources. The MVNO can also install individual network functions in a virtualized manner. The
MVNO sets up the network and launches the services.
3) The operator adjusts the SAME network slice dynamically following the requirements and the load
of the network functions of the MVNO.
4) The operator maintains the MVNO's network built on the hardware resource pool.

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