The MC service shall support the capability for 5G ProSe UE-to-network relay to restrict the relayed group communication on a per group basis by using the relay service codes corresponding to the group.
5G ProSe (as specified in
TS 23.304) supports layer 2 UE-to-network relay and layer 3 UE-to-network relay. The procedure defined in
clause 10.5 of TS 23.280 applies with the following differences:
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5G ProSe UE-to-network relay is provisioned that each relay service code is offering layer 2 or layer 3 UE-to-Network Relay service.
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5G ProSe remote UE is provisioned that each relay service code is offering layer 2 or layer 3 UE-to-Network Relay service.
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5G ProSe Layer-3 UE-to-network relay is provisioned with suitable relay service codes to support access to N3IWF for the case of 5G ProSe Layer-3 UE-to-network relay with the support of N3IWF.
The 5G ProSe UE-to-network relay provides a layer 2 or layer 3 routing service (as specified in
TS 23.304) for a 5G ProSe remote UE, when the MC service user on the 5G ProSe remote UE requires to access the MC service via a 5G ProSe UE-to-network relay.
The application layer signalling for the MC service user on a 5G ProSe remote UE using a 5G ProSe UE-to-network relay are identical to the application layer signalling for the MC service user on an on-network UE.