# Summary of 3GPP Change Request S4-26xxxx

## Document Information
- **Source:** LG Electronics Inc.
- **Title:** Consideration on Media Delivery Architecture
- **Specification:** 3GPP TR 26.807 (FS_6G_MED)
- **Purpose:** Proposal for Agreement

## Main Technical Contribution

### Multi-network Cooperative Media Delivery Architecture (New Clause 6.1.x)

#### Core Concept

The contribution proposes a fundamental shift in 6G media delivery architecture from parallel network usage to **functional decomposition and cooperative delivery** across heterogeneous networks. Key aspects include:

- **Integration of heterogeneous networks:** Broadcast, mobile communication, fixed IP, and satellite networks operate as a unified media delivery system
- **Role-based network assignment:** Each network assumes distinct roles based on content characteristics
- **Non-3GPP networks as equal partners:** Broadcast and other non-3GPP networks treated as equal delivery resources rather than auxiliary means

#### Functional Decomposition Approach

Media content is decomposed into constituent elements, with each delivered through the most appropriate network:

- **Common content** (e.g., main video stream of live sports): Delivered via broadcast/multicast networks for efficiency during massive simultaneous viewing
- **Personalized elements** (e.g., advertisements, UI, viewpoint selection, commentary): Delivered via unicast/IP networks on per-user basis
- **Interactive data and control components:** Handled through appropriate low-latency paths

#### Media-Aware Network Operation

The architecture enables **semantic-aware delivery** where:

- Networks recognize media content meaning and characteristics
- Dynamic adjustment between broadcast/unicast and fixed/mobile based on:
  - Scale of concurrent consumption
  - Latency sensitivity
  - Energy efficiency requirements
  - User mobility
- **AI-based control functions** perform real-time optimization
- Cooperation with user devices and service providers

#### Application Scenarios

The architecture applies to:

- **Streaming-based media services:** Traditional video delivery with personalization
- **XR and spatial media services:** 
  - Base video streams/spatial information via broadcast paths
  - User-specific viewpoint changes and interaction data via low-latency 6G unicast
  - Achieves both scalability and immersion

#### 6G Network Role Evolution

6G evolves from direct traffic accommodation to:

- **Central orchestrator** of heterogeneous media delivery ecosystem
- **Higher-level platform** providing integrated control over diverse network resources
- **Intelligent network composer** automatically selecting optimal network combinations based on media characteristics

#### Standardization Considerations

- Need for **common interfaces** enabling improved accessibility to non-3GPP standards (including broadcast systems like DVB and ATSC)
- Addresses limitations of 5G approach which focused primarily on parallel network usage
- Moves beyond independent treatment of broadcast and mobile systems

### Conclusions (Clause 6.1.x.2)

The 6G media architecture:
- Supports coexistence of heterogeneous networks for media services
- Separates transmission methods per media element with intelligent integration
- Simultaneously supports massive simultaneous viewing and hyper-personalized interactive media
- Applicable across multicast/broadcast, streaming, XR, and next-generation immersive media

### Related Requirements (Clause 6.1.x.3)

The proposal maps to existing TS 22.870 requirements:

#### Clause 5.4.2 - Legacy Services Support
- Broadcast and Multicast Services (ref TS 22.261)

#### Clause 5.9.8 - Enhanced Network Service Awareness
- **[PR 5.9.8.2-1]:** 3rd party service provider information sharing on service characteristics per traffic flow component
- **[PR 5.9.8.2-2]:** Dynamic network resource adjustment based on service characteristics and predicted changes
- **[PR 5.9.8.2-3]:** Charging support for differentiated services per media component

#### Clause 11.2 - UAM Aircraft Communications
References performance requirements for various media services on UAM aircraft including:
- 8K video live broadcast (100 Mbps uplink, 200ms latency, 95% reliability)
- Video streaming (4-100 Mbps depending on resolution, 100ms latency, 95% reliability)
- Remote controller through HD video (≥25 Mbps uplink, 100ms latency, 99% reliability)
- Video conferencing (25 Mbps bidirectional, 100ms latency, 99% reliability)
- Immersive multimedia services/cloud gaming (100-500 Mbps downlink, 50ms latency, 99% reliability)

All services specified for up to 1000m altitude AGL in urban/rural/scenic areas.