Clause 5 and clause 6 of the present document describe the high-level procedures for downlink and uplink media streaming respectively. As part of these procedures, the 5GMS Application Provider performs service provisioning at the 5GMS AF. The 5GMS-Aware Application subsequently receives Service Access Information from the 5GMS Application Provider over reference point M8 or else the Media Session Handler acquires it directly from the 5GMS AF over reference point M5. This annex describes an example method for network slice selection based on traffic description information inside URSP rules for bootstrapping 5GMS application invocation on a Network Slice.

From clause 5.15.5.2.2 of TS 23.501, the UE uses either the URSP rules (which includes the NSSP) or the UE local configuration to determine which PDU Sessions to use to route ongoing application traffic. Clause 6.6.2.1 of TS 23.503 describes the structure of URSP rules. One of the components of a URSP rule is the Traffic description information that helps a UE to identify matching application traffic. Table 6.6.2.1-2 of TS 23.503 specifies a number of Traffic descriptor options, one of which is the Application descriptor that identifies traffic of applications running on the UE. An Application descriptor consists of OS Id and OS App Id properties that are known to both the UE application and the 5GMS Application Service Provider. Assumptions:

• The 5GMS-Aware Application developer is aware of different OS App Ids supported by the UE operating system.

Figure F.2-1 below illustrates the procedure for bootstrapping application invocation on a Network Slice.

The steps are as follows: