Page 413 - 5G Basics - Core Network Aspects

Core network aspects 1

10) MAS-F decomposes service components related information from the response, and constructs two
responses for SC1 and SC2.
11)-14) The two responses are routed to MUE1 along the original paths.

After the steps above, there will be two service components for MUE1, which use different interfaces and
different networks, and only one service component for MUE2.

9.4 Enhanced messaging

Call-related enhanced messaging requires that a message can be exchanged in a session. In the
multi-connection environment, the phone call is transmitted through the CS network and the messages are
transmitted through the PS network. The information flow is shown as Figure 9-7.

Figure 9-7 – Call-related enhanced messaging
0) The CS voice call is set up in the CS network and the capabilities of both ends are known.
1)-4) MUE1 initiates the SIP invite process.

5)-8) MUE2 successfully responds with the SIP OK message.
9)-12) When the SIP OK message is received, the MUE1 transmits the ACK confirmation to the MUE2.
13) MUE1 transfers the chat message via MSRP to MUE2; the transmission is bidirectional.
14)-17) When the transmission is completed, MUE1 sends the SIP bye message to MUE2.
18)-21) MUE2 responds with a SIP OK message to MUE1.

10 Charging consideration

In the multi-connection environment, resources of different networks can be allocated and used by a single
user at the same time. Multiple connections should also be charged at the same time. It is required to charge
only once for the usage of the service, even when multiple usage records are generated in different networks.
The eMMTel includes a variety of service types, such as social presence service, instant message service, file
transfer, content sharing, network address book and so on. Different service types have different
characteristics. And their charging elements are also different from each other. Charging for eMMTel needs
to be able to generate usage records, and provide a flexible and customized billing strategy, so as to satisfy

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