Summary of 3GPP Change Request S4-260060

Document Overview

This pseudo-CR proposes draft content for Sub-clause 4.2 of TR 26.870 (FS_6G_MED), establishing preliminary requirements for the 6G media study. The contribution identifies media-related requirements derived from SA1 TR 22.870 use cases covering System and Operational Aspects (Clause 5) and AI (Clause 6).

Main Technical Contributions

1. References Update (Clause 2)

Adds normative and informative references essential for 6G media requirements:

• New Normative References:
• TR 22.870: 6G Use Cases and Service Requirements
• TR 23.801-01: Architecture for 6G System Stage 2
• TS 26.501: 5GMS General description and architecture
• TS 26.506: 5G Real-time Media Communication Architecture

• TS 22.ABC: 6G System Requirements

• New Informative References:

• TS 22.101: Service principles
• TS 22.261: 5G system service requirements
• TS 22.173: IMS Multimedia Telephony Service
• TS 22.153: Multimedia priority service

2. Requirements Framework (Clause 4.2)

Establishes structure for media-related requirements with an editor's note indicating revision pending SA1 consolidated 6G requirements completion.

3. System and Operational Aspects Requirements (Clause 4.2.1)

3.1 Non-3GPP Access Support (Clause 4.2.1.1)

Based on TR 22.870 Clause 5.3, identifies requirements for interoperability across access technologies:

• Requirement 1: Support user access to network services via 3GPP and/or non-3GPP access (e.g., WLAN, Wireline)
• Requirement 2: Support 5G system requirements for non-3GPP access
• Requirement 3: Support mobility between 6G 3GPP and non-3GPP access with minimal user experience impact (QoS, QoE), subject to operator policy
• Requirement 4: Provide means for UEs to determine appropriate access technology (3GPP vs non-3GPP) when congestion detected, subject to operator policy (initial access only)

Key Application: Leveraging non-3GPP technologies (ATSC, DVB) for multicast/broadcast delivery, complemented by 3GPP unicast for repair and UE join procedures.

3.2 Interworking with Legacy Systems (Clause 4.2.1.2)

Based on TR 22.870 Clause 5.4.2, identifies media-related capabilities requiring continuity from 5G:

• Multimedia communication services (TS 22.101, TS 22.261, TS 22.173)
• Broadcast and Multicast Services (TS 22.261)
• Multimedia Priority Service (MPS) (TS 22.153)

3.3 Network Aspects (Clause 4.2.1.3)

Based on "Enhanced Network Service Awareness" use case (TR 22.870 Clause 5.9.8), addressing challenges of 6G services with multiple data streams (video, voice, text, sensor data, AI, sensing) having varied traffic patterns and QoS requirements:

• [PR 5.9.8.2-1]: Support authorized 3rd party service providers to provide service characteristics information for each traffic flow component to the 6G network (subject to operator policy)
• [PR 5.9.8.2-2]: Support mechanisms to dynamically adjust and optimize network resources based on service characteristics, including predicted changes (subject to operator policy)
• [PR 5.9.8.2-3]: Provide appropriate charging support for differentiated services per media component (e.g., SLA requirements)

4. AI-Related Media Requirements (Clause 4.2.2)

Derived from multiple AI use cases in TR 22.870 Clause 6:

4.1 Network-Assisted Video-Based AI Inference (Clause 6.28)

• [PR 6.28.6-1]: Support means for authorized 3rd party to provide expected communication performance requirements (e.g., max/average packet error rate per video frame) for enhanced user experience (subject to operator policy and 3rd party agreement)

4.2 UE-Network Collaboration with AI Capabilities (Clause 6.31)

• [PR 6.31.6-1]: Network or application enablement layer shall manage and coordinate AI tasks considering AI workload offloading into Service Hosting Environment

4.3 AI-Assisted Multi-Modal Communication Service (Clause 6.42)

• [PR 6.42.6-1]: Support media transformations in multi-modal communication services, including:
• Image to video
• 2D video to 3D video/avatar media
• Text to video and vice-versa

(Subject to operator policy and user consent; transformations via AI capabilities of 3rd party or 6G network including IMS)

4.4 Real-Time Video Super-Resolution Service (Clause 6.50)

• [PR 6.50.6-1]: Manage and coordinate network operations (AI model training/selection, computing resource selection, communication performance monitoring) upon receiving combined 3GPP service requests (subject to operator policy)
• [PR 6.50.6-2]: Support mechanism to guarantee user experience when providing combined 3GPP services (e.g., 6G AI service + communication service) (subject to operator policy)
• [PR 6.50.6-3]: Monitor performance (e.g., AI model inference accuracy) and report to 3rd party (subject to operator policy)

Key Technical Themes

1. Multi-access convergence: Seamless integration of 3GPP and non-3GPP access for media delivery
2. Dynamic resource management: Fine-grained, per-component QoS handling for complex multi-stream services
3. AI integration: Network support for AI-enhanced media processing, including offloading, transformation, and super-resolution
4. 3rd party collaboration: Framework for authorized service providers to interact with network for optimized media delivery
5. Legacy continuity: Maintaining 5G media capabilities while extending for 6G scenarios