Page 276 - 5G Basics - Core Network Aspects

1 Core network aspects

13) MPC-FE sends sub-service resource response to SCF.

14) SCF sends sub-service resource response to MAS-F.
15) MAS-F sends sub-service resource response to SCF.

IV.7 Subscriber attaches to the access network
This clause provides high level information flow that defines the network attachment and connection
registration process.

MUE AC-FE MUP-FE MR-FE

1. Access authentication
2. IP address assignment
3. Connection update request
4. Connection update

Y.2027(12)_FIV.8

Figure IV.8 – Subscriber attaches to the access network

1) The MUE attaches to an access network through the access authentication process.
2) After successful access authentication, the MUE will get an IP address for the new interface.
3) The MUE sends a Connection Update Request message with the new IP address to the MR-FE to
register a new connection.
4) The MR-FE updates the available connections of the MUE. If needed, the MR-FE further sends a
Connection Update message which contains the available connections of the MUE to the MUP-FE.

IV.8 Policy control procedure
The multi-connection policy control procedure is illustrated in Figure IV.9. When the MUE initiates a multi-
connection service, a multi-connection control request is triggered in the SCF.

MUE SCF MPC-FE MUP-FE MC-FE MR-FE MMF
1. Service request
2. Resource request
3. Subscriber information check

4. Policy
decisions
5. Resource request
6. Connection check

7. Policy
decisions
8. Policy installation
9. Resource response
10. Resource response
11. Service response

Y.2027(12)_FIV.9

Figure IV.9 – Policy control procedure

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