Based on the identified use cases in clause 5, this clause documents how AR/MR service scenarios are supported in 5G system architecture. There already exist developed 5G system architectures relevant to deliver immersive media depending on the underlying functionalities, such as real-time communications, adaptive delivery, QoS guarantee, and a support of network node processing. An architecture of 5G Media Streaming (5GMS) for both downlink and uplink is specified in TS 26.501 and it is under development to support the edge media processing. In addition, MTSI architecture extended to 5G system [15] may be applied to AR/MR conversational scenarios to guarantee the specific service QoS. In the following clauses, these relevant architectures will be analysed to identify potential standardisation areas for each scenario. Note that only STAR UE and EDGAR UE in Table 4.2.2.1-1 are taken into account, as WLAR UE as well as WTAR UE have similar functionalities with STAR UE from a 5G system perspective. Specifically, STAR UE (and WLAR/WTAR UEs) possibly has an on-device decoding and rendering capability for immersive media and may rely on support from 5G cloud/edge for a certain condition. On the other hand, EDGAR UE always requires 5G cloud/edge for immersive media decoding and rendering, and the conventional 2D media is exchanged in Uu interface. Table 6.1-1 provides a list of AR/MR service scenarios and the associated use cases for each. Note that some use cases may be duplicated as they address multiple features.