Page 275 - 5G Basics - Core Network Aspects

Core network aspects 1

IV.6 Service decomposition with QoS policy control

This procedure shows the service decomposition with QoS policy control when a call is established.

SCF MAS-F MUP-FE MPC-FE MMF

1. Service
request trigger

2. Service decomposition request
3. Connections check

4. Decomposition
decision
5. Sub-service resource request
6. Sub-service resource request
7. Policy install

8. Sub-service resource response
9. Sub-service resource response
10. Sub-service resource request
11. Sub-service resource request
12. Policy install
13. Sub-service resource response

14. Sub-service resource response
15. Service decomposition response

Y.2027(12)_FIV.7

Figure IV.7 – Service decomposition

1) SCF receives a service request from remote MUE, which triggers SCF to initiate a service request.
2) SCF further sends a service decomposition request to MAS-F, to request MAS-F to decide if the MUE
is under multi-connections, and if the MUE needs service decomposition.

3) MAS-F sends connection check request to MUP-FE to obtain the available connections of the MUE.
4) MAS-F makes decomposition decision based on the service decomposition request and the available
connections of the MUE.

5) MAS-F sends sub-service resource request to SCF with service resource requirements which would
be divided to the connection one.

6) SCF further sends the sub-service resource request to MPC-FE.
7) MPC-FE makes policy rules based on QoS resource requirements, etc., and then sends a request to
install the rules in MMF under connection one.

8) MPC-FE sends sub-service resource response to SCF.
9) SCF sends sub-service resource response to MAS-F.
10) MAS-F sends sub-service resource request to SCF with service resource requirements which would
be divided to the connection two.
11) SCF further sends the sub-service resource request to MPC-FE.
12) MPC-FE makes policy rules based on QoS resource requirements, etc., and then sends a request to
install the rules in MMF.

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