# Summary of S4-260204: Time Plan for DC Enhancements WI

## Introduction

This document proposes a time plan for the Study Item on Data Channel Enhancements (FS_DCE_MED), which was approved at SA plenary #110. The study aims to address clarifications and enhancements to the Data Channel functionality in TS 26.114.

## Study Item Key Issues

The Study Item addresses six key issues:

### KI#1: Analyze Multiplexing Edge-Cases (per TS 23.228 AC.7.10)
- Study multi-application multiplexing scenarios where an m-line combines several a=3gpp-req-app attributes with mixed endpoint types (…-UE and …-Server)
- Document examples aligning with stage-2 procedures

### KI#2: Interworking Facilitation with MTSI
- Study signaling aspects for associating a DC application stream to MF-anchored RTP legs when interworking is invoked per TS 23.228 AC.7.9
- Document informative examples consistent with TS 23.228 AC.7.9 flows

### KI#3: Clarifications to HTTP Protocol Usage on DC
- Study and recommend solutions for handling external resources
- Document guidelines on DC application behavior for the HTTP subprotocol

### KI#4: Consolidate Rel-19 Stage 3 Implications
- Address stage 3 implications from NG_RTC_Ph2
- Address identified ambiguities if applicable
- Incorporate features from other 3GPP WGs and SDOs (e.g., GSMA LS on Automatic Resumption)
- Handle any future incoming LSs

### KI#5: Identify Inconsistencies and Ambiguities
- Identify inconsistencies between TS 23.228 and TS 26.114, TS 26.264, and TS 26.567
- Document alignment and clarification actions if needed

### KI#6: Document New Media Use Cases
- Document new media use cases
- Identify gaps and potential solutions for IMS DC based on SA1 requirements

## Proposed Timeline

### SA4#134 (17-21 November 2025, Dallas, US)
- Agree study item

### 3GPP SA4 RTC SWG AHG Telcos
- Agree draft TR 26.814
- Document identified key issues
- Prioritize topics to be addressed
- Document proposed changes

### SA4#135 (09-13 February 2026, Goa, IN)
- Agree draft TR 26.814
- Document identified key issues
- Prioritize topics to be addressed
- Submit TR for information

### SA4#135e-bis (13-17 April 2026, online)
- Discuss and agree solutions to key issues
- Prepare and document CR drafting plans

### SA4#136 (11-15 May 2026, Montreal, CA)
- Finalize solutions to key issues
- Prepare and document CR drafting plans
- Send LSs to other 3GPP groups and SDOs outlining next steps based on TR findings
- Submit TR for approval

### SA#112 (09-12 June 2026, Singapore, SG)
- Approve TR 26.814