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Content for  TS 23.379  Word version:  19.1.0

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7 Functional model  7.1 General  7.2 Description of the planes  7.3 Functional model description  7.3.1 On-network functional model  7.3.2 Off-network functional model 
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7  Functional model  p. 19

7.1  General  p. 19

The functional model for the support of MCPTT is defined as a series of planes to allow for the breakdown of the architectural description.

7.2  Description of the planes  p. 20

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.

7.3  Functional model description  p. 20

7.3.1  On-network functional model  p. 20

Figure 7.3.1-1 shows the functional model for the application plane of the MCPTT service.
Reproduction of 3GPP TS 23.379, Fig. 7.3.1-1: Functional model for application plane of the MCPTT service
Figure 7.3.1-1: Functional model for application plane of the MCPTT service
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In the model shown in Figure 7.3.1-1, the following apply:
  • The MCPTT server is an instantiation of a MC service server in accordance with TS 23.280.
  • The MCPTT server is an instantiation of a GCS AS in accordance with TS 23.468.
  • MCPTT-9 carries multicast floor control signalling between the floor control server of the MCPTT server and the floor participant of the MCPTT UE.
  • MCPTT-4 carries unicast floor control signalling between the floor control server of the MCPTT server and the floor participant of the MCPTT UE.
  • MCPTT-7 carries unicast media between the media distribution function of the MCPTT server and the media mixer of the MCPTT UE.
  • 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.
Reproduction of 3GPP TS 23.379, Fig. 7.3.1-2: Relationships between reference points of MCPTT application and signalling control planes
Figure 7.3.1-2: Relationships between reference points of MCPTT application and signalling control planes
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7.3.2  Off-network functional model  p. 21

Figure 7.3.2-1 shows the functional model for off-network operation of MCPTT service.
Reproduction of 3GPP TS 23.379, Fig. 7.3.2-1: Functional model for off-network operation of MCPTT service
Figure 7.3.2-1: Functional model for off-network operation of MCPTT service
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