6 Interaction with other services and functions

22.4683GPPGroup Communication System Enablers (GCSE)Release 17TS

6.1 Emergency calling

The ability for a UE to make an emergency call (3GPP TS 22.101 [5]) shall be unaffected by being in a Group Communication.

6.2 Interaction with ProSe

If the 3GPP system supports ProSe, the 3GPP system shall be able to make use of ProSe Group Communication and the public safety ProSe UE-to-Network Relay for Group Communication, subject to operator policies and UE capabilities or settings.

A public safety ProSe-enabled UE not served by a public safety enabled 3GPP system shall be able to support Group Communication based on ProSe Communication paths. A public safety ProSe-enabled UE shall be able to dynamically express its interest in receiving, via a public safety ProSe UE-to-Network Relay, the Group Communications of one or more GCSE Groups for which it is authorized.

A public safety ProSe UE-to-Network Relay shall be able to relay Group Communication to/from ProSe Communication paths, if the following conditions apply:

• the GCSE Group is allowed to be relayed; and
• the public safety ProSe UE-to-Network Relay is allowed to relay Group Communication.

A public safety ProSe UE-to-Network Relay shall be able to restrict the relayed Group Communication on a per group basis.

The system shall support groups whose membership shall be the same irrespective of whether a Group Communication is made using ProSe Group Communication or GCSE Group Communication.

GCSE Group Members shall be able to access Group Communication services using ProSe Communication paths [9] and/or by network path (3GPP TS 22.278 [9]).

Annex A (informative):
Use cases