Content for TS 23.379 Word version: 18.4.0
The functional model for the support of MCPTT is defined as a series of planes to allow for the breakdown of the architectural description.
The description of the planes and the relationship between the planes are contained in the common functional architecture to support MC services in
TS 23.280.
Figure 7.3.1-1 shows the functional model for the application plane of the MCPTT service.
In the model shown in
Figure 7.3.1-1, the following apply:
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The MCPTT server is an instantiation of a MC service server in accordance with TS 23.280.
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The MCPTT server is an instantiation of a GCS AS in accordance with TS 23.468.
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MCPTT-9 carries multicast floor control signalling between the floor control server of the MCPTT server and the floor participant of the MCPTT UE.
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MCPTT-4 carries unicast floor control signalling between the floor control server of the MCPTT server and the floor participant of the MCPTT UE.
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MCPTT-7 carries unicast media between the media distribution function of the MCPTT server and the media mixer of the MCPTT UE.
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MCPTT-8 carries multicast media from the media distribution function of the MCPTT server to the media mixer of the MCPTT UE.
Figure 7.3.1-2 shows the relationships between the reference points of the application plane and the signalling plane.
Figure 7.3.2-1 shows the functional model for off-network operation of MCPTT service.