Page 264 - 5G Basics - Core Network Aspects

1 Core network aspects

Reference point Cr

It exists between MC-FE and MR-FE. It allows MC-FE to interact with the MR-FE for checking on MUE available
connections information. MC-FE would report abnormal status of access network to MR-FE to update
available access network information and MR-FE would updates connection information of MUE to MC-FE
through this point.

Reference point Cm
It exists between MC-FE and MMF. It allows MC-FE to push the policy decisions to the MMF for enforcement.
MC-FE sends specific load and/or QoS policy to MMF through this point, MMF is recommended to update
real-time connection information to MC-FE to reauthorize multi-connection policy.

Reference point Ma
It exists between MMF and AC-FE. It allows MMF to assist AC-FE to enforce specific policy decisions and to
assign traffic among access networks.

Reference point Rt
It exists between MR-FE and MUE. MUE would report MUE available access information or location
information to MR-FE by Rt. MR-FE might also record user's preference or ISP's network selection
recommendations and push them to MUEs through this point.

7 Multi-connection architecture in relation to the NGN architecture

The relation between multi-connection architecture and the NGN architecture is shown in Figure 7-1.
Multi-connection FEs are added to NGN architecture.

External applications Applications
ANI ANI
SNI
Multi-connection
Application support functions service function Multi-connection
and service support functions Multi-connection control function
Functions application
from support function Multi-connection
policy control FE
other
IdM Service control and content delivery functions service
functions Content providers Service control Multi-connection
Service user Service control delivery function user profile FE
profiles functions functions Multi-connection
coordination FE
Management functions Network attachment Resource Multi-connection Multi-connection
Service stratum
registration FE
transport control
function
Multi-connection
Mobility
and control functions
and
management
and control admission Functions media function
Transport user functions control
profiles functions from
other
End-User networks Access control Access control
functions Transport control functions functional functional
entity 1 entity 2 MUE
Multi-connection
Transport functions terminal control
Access Access
UNI Transport stratum NNI network 1 network 2 function
Rt
Control Media Management IdM Multi-connection control Others
Y.2027(12)_F7-1

Figure 7-1 – Relationship between multi-connection architecture and NGN architecture

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