Page 378 - 5G Basics - Core Network Aspects

1 Core network aspects

13) The streaming connection(s) has been established between the MUE and MSCD-FE, and then the
streaming can be transported from MSCD-FE to MUE.

9.2 Streaming decomposition

This flow shows streaming decomposition after streaming connections have been established, according to
the subscriber's request, service requirements, network status, etc. The purpose of streaming decomposition
is to transfer streaming flows with multiple connections to achieve the best service quality, e.g., smooth
replay and no interruption. The information flow is shown in Figure 9-2.

Figure 9-2 – Streaming decomposition
1) MSCC-FE sends a streaming delivery request message to MSCD-FE, to request to transfer the
prepared streaming content.
2) MSCD-FE forwards this streaming delivery request message to MAS-F.
3) MAS-F obtains related information (such as available connections of the MUE, the requirements of
the streaming transmission or the user's requirements, etc.) from MUP-FE and MSUP-FE to decide
which one or several connections can be used to deliver the decomposed streaming flows.
4) MAS-F makes a decomposition decision according to the information already obtained.
5) After the streaming flow is split into two components, i.e., streaming component 1 (SC-1) and
streaming component 2 (SC-2), MAS-F sends a delivery request message with streaming
requirements to initiate a connection for SC-1.
6) SCF forwards the request message to MPC-FE, to request to establish a related transmission policy
for SC-1.
7) MPC-FE makes policy rules based on QoS requirements, then sends a request to MMF to install the
QoS rules for SC-1.

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