Summary of S4-260059: Considerations on Work Topic 4 - Ubiquitous Access

Document Overview

This contribution from Qualcomm introduces initial considerations for Work Topic #4 (WT#4) "Media for Ubiquitous Access" in the FS_6G_MED study (TR 26.870). The document serves as a starting point for discussions on media services support in ubiquitous networks, particularly Non-Terrestrial Networks (NTN) and low bit-rate/low power scenarios beyond speech.

Main Technical Contributions

Work Topic Scope and Objectives

The document clarifies the primary focus of WT#4:
- Study aspects and opportunities for media services on ubiquitous networks including NTN
- Address low bit-rate/low power scenarios beyond speech
- Identify supported bitrates, functionalities, delays, power consumption and other design vectors
- Take into account information collected in the FS_ULBC study

Study Methodology

The contribution proposes a structured approach with the following elements:

1. Documentation of work topics in detail, particularly their relation to media delivery
2. Identification of dependencies with other working groups and collection of relevant developments within 3GPP and externally
3. Mapping to basic functions based on existing media delivery architectures (5GMS, 5G RTC) and SA2 architectures
4. Gap analysis to identify potential solutions requiring further study or normative work
5. Coordination with other 3GPP groups (SA1, SA2, SA3, SA5, SA6, RAN) and external organizations (SVTA, CTA WAVE, ISO/IEC JTC1 SC29, 5G-MAG, MSF, Khronos, IETF)

References Section Updates

The CR adds relevant normative and informative references:
- TR 22.870 (SA1 6G use cases and service requirements)
- TR 23.801-01 (SA2 6G architecture study)
- TS 26.501 (5GMS architecture)
- TS 26.506 (5G RTC architecture)
- Multiple existing SA4 specifications (TS 26.114, 26.117, 26.502, 26.510, 26.511, 26.512, 26.517)
- ULBC study reference

Technical Content Structure

High-level Description

Focuses on studying aspects and opportunities for media services on ubiquitous networks, with emphasis on:
- Non-Terrestrial Networks
- Low bit-rate/low power scenarios beyond speech
- Identification of supported bitrates, functionalities, delays, power consumption
- Leveraging FS_ULBC study findings

Potentially Relevant Use Cases and Requirements

Placeholder for SA1 use cases (to be completed)

Potentially Relevant 6G Architecture Key Issues

Identifies three key issues from TR 23.801-01:
- Key Issue #4: User Plane Architecture
- Key Issue #23: Support of 6G NTN
- Key Issue #24: Analyse 5GS IoT features and solutions

Initial Key Issues for Study

The document proposes two initial key issues as starting points:

1. Channel Characteristics: What are bitrate ranges, latencies and loss characteristics of relevant 3GPP Non-Terrestrial Networks?

2. Service Performance: How would existing services and applications perform under such channel conditions?

Editorial Notes

The document includes several editor's notes indicating:
- More content to be added to the key issues section
- Need to complete use cases and requirements by checking SA1 work
- The subsection ordering may be adapted as appropriate for specific content

Dependencies and Coordination

The study explicitly requires coordination with:
- 3GPP groups: SA1 (TR 22.870), SA2 (TR 23.801-01), RAN (TR 38.960), SA3, SA5, SA6
- External organizations: SVTA, CTA WAVE, ISO/IEC JTC1 SC 29, 5G-MAG, Metaverse Standards Forum, Khronos, IETF