Page 536 - 5G Basics - Core Network Aspects

1 Core network aspects

Figure 8-3 – Procedure for application with multiple devices-to-one

The interaction shown in Figure 8-3 are as follows:
1) UE#1 of user 1 request service initiation as a sender to CSF and CSF updates activation status.
2) On receiving service initiation request, CSF sends update message to C-MMCF to inform that UE#1
of user 1 has just been activated by user.
3) UE#1 of user 2 requests service to CSF and CSF updates activation status.
4) On receiving service request, CSF sends updated message to C-MMCF to inform that UE#1 of user 2
has just been activated by user.
5) CSF requests service to UE#1 of user 1.
6) On receiving service request, UE#1 of user 1 sends content with the source set to user address
U1_addr and the destination set to user address U2_addr.
7) On receiving packet from UE#1 of user 1, transport function relays content with the change of
destination information. The destination is changed from user's address (U2_addr) to activated
device address (U2_UE#1_addr).
8) User 1 changes device from UE#1 to UE#2 and UE #2 requests service initiation to CSF and CSF
updates activation status. Now active device of user 1 is UE#2.

9) On receiving service initiation request, CSF sends updated message to C-MMCF to inform that UE
#2 of user 2 has just been activated by user.
10) C-MMCF updates UE #2's location information and send information to transport function.

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