In this collaboration scenario, both the 5GMSu AS and 5GMSu AF are present. The 5GMSu AS resides in the external domain. While it employs 5GMS protocol and format for uplink media reception from the 5GMSu Client (M4u), norit performs content egest to the 5GMSu Application Provider over a M2u-like (M2u') protocol and format (and therefore it is called 5GMSu-like AS). The 5GMSu AF is used to interact with the 5GMSu Application Provider at the reference point M1 for uplink media streaming provisioning System, and to interact with the Media Session Handler of the 5GMSu Client for providing Service Access Information, dynamic policy invocation and/or other uplink media streaming related functionality such as metrics reporting and network assistance). The Provisioning API (M1u') and Ingest API (M2u') may follow 5GMS specifications.