3GPP TR 26.942 CR 0024 Rev 5 - Solution 5 Update for Energy Information Exposure

General Information

Title: [FS_Energy_Ph2_MED] Solution 5 update
Work Item: FS_Energy_Ph2_MED
Release: Rel-20
Category: F (Correction)
CR Revision: 5

Purpose of Change

This CR provides corrections and updates to Candidate Solution 5 in TR 26.942, focusing on:
- Correcting procedures in clauses 7.6.3.1 and 7.6.3.2 to align with TS 23.501 and TS 29.566
- Reformatting according to new principles for documenting Candidate Solutions
- Adding missing normative references

Main Technical Contributions

1. References Update (Clause 2)

Added three new normative references:
- TS 26.510: Media delivery; interactions and APIs for provisioning and media session handling
- TS 26.512: 5G Media Streaming (5GMS); Protocols
- TS 26.113: Real-Time Media Communication; Protocols and APIs

2. Functional Description Enhancements (Clause 7.6.1A)

Clarified scope and objectives:
- Solution addresses exposure of energy-related information from Media AS to UE or Media AF
- Demonstrates integration into 5GMS architecture
- Enables UE or 5GMS AF to optimize environmental impact
- Explicitly states this is a generic architecture for reuse, not specific optimization strategies
- Energy information exposure controlled by Application Service Provider using Energy Information Exposure Specification

3. New Collaboration Scenarios Section (Clause 7.6.1B)

Added explicit statement that solution applies to all collaboration scenarios requiring access to energy-related information from:
- UE
- Application Server
- EIF (Energy Information Function)

4. Generic High-Level Procedures Update (Clause 7.6.3.1)

Major restructuring of procedure flow:

Provisioning Phase (Steps 1-4)

1. Application Service Provider provisions Energy Information AF with Energy Information Exposure Specification
2. Energy Information AF subscribes to NF Energy Information from EIF (E12 reference point)
3. EIF responds with NF Energy Information report
4. Energy Information AF configures and subscribes to AS Energy Information from AS (E3 reference point)
5. AS responds with most recent AS Energy Information report

UE-Initiated Phase (Steps 5-11)

1. UE Application creates energy information collection context with Energy Information Collector (E6 reference point)
2. Energy Information Collector requests UE Energy Information collection configuration from Energy Information AF (E5 reference point), including Application Identifier
3. Energy Information Collector subscribes to Network Energy Information from Energy Information AF with Service Data Flow descriptions and Session Identifier
4. Energy Information AF processes NF and AS Energy Information reports
5. Energy Information AF exposes processed Network Energy Information to Energy Information Collector
6. Energy Information Collector collects additional UE Energy Information from UE functions
7. Energy Information Collector processes UE-related Energy Information

Repetitive Reporting Phase (Steps 12-18)

1. EIF exposes NF Energy Information report to Energy Information AF
2. AS exposes AS Energy Information report to Energy Information AF
3. Energy Information AF processes received reports
4. Energy Information AF exposes processed Network Energy Information to Energy Information Collector
5. Energy Information Collector receives additional UE Energy Information
6. Energy Information Collector processes UE-related Energy Information
7. Energy Information Collector exposes energy-related information to UE Application

Context Modification Phase (Steps 20-23)

1. UE Application informs Energy Information Collector of context modification with new Service Data Flow filters
2. Energy Information Collector updates subscription with Energy Information AF
3. Energy Information AF updates subscription with EIF
4. Energy Information AF updates subscription with AS

5. 5GMS-Specific Procedures Update (Clause 7.6.3.2)

Comprehensive restructuring aligned with 5GMS architecture:

Provisioning Phase (Steps 1-4)

1. 5GMS Application Provider provisions 5GMS AF via M1, including Energy Information exposure configuration
2. Energy Information AF subscribes to NF Energy Information from EIF with Application Identifier, requesting immediate report
3. EIF responds with NF Energy Information report
4. Energy Information AF subscribes to AS Energy Information from 5GMS AS with Application Identifier
5. 5GMS AS responds with most recent AS Energy Information report

Media Session Initiation Phase (Steps 5-15)

1. 5GMS-Aware Application initiates media delivery session with flag enabling energy information collection
2. Media Session Handler obtains Service Access Information including Energy Information AF details
3. Media Session Handler creates energy information collection context in Energy Information Collector
4. Energy Information Collector requests UE Energy Information collection configuration from Energy Information AF
5. Response includes UE Energy Information collection configuration and subscription endpoint
6. Energy Information AF processes NF and AS Energy Information reports
7. Energy Information AF exposes processed Network Energy Information report to Energy Information Collector

NOTE 1 added: Explains that initial reports are not UE-specific but describe total energy consumed by all consumers (Application Identifier-based or AS service location-based)

1. Energy Information Collector subscribes to UE Network Energy Information from Media Stream Handler (M11)
2. Media Stream Handler responds with UE Network Energy Information report
3. Energy Information Collector processes Network and UE Energy Information
4. Energy Information Collector exposes aggregated Energy Information to Media Session Handler and Media Stream Handler
5. Media Session Handler provides available Media Entry Points to 5GMS-Aware Application, including Energy Information

Media Entry Point Selection (Steps 16-17)

1. 5GMS-Aware Application selects Media Entry Point
2. 5GMS-Aware Application invokes Media Stream Handler with selected Media Entry Point

Parallel Energy Information Reporting (Steps 18-26)

1. EIF exposes NF Energy Information report to Energy Information AF
2. 5GMS AS exposes AS Energy Information report to Energy Information AF
3. Energy Information AF processes network energy information reports
4. Energy Information AF exposes processed Network Energy Information to Energy Information Collector
5. Media Stream Handler exposes UE Energy Information report to Energy Information Collector
6. Energy Information Collector processes received Energy Information reports
7. Energy Information Collector shares processed report with Media Session Handler
8. Media Session Handler may expose energy-related information
9. 5GMS-Aware Application may expose received information to Application Service Provider via M8

Media Streaming with Context Modification (Steps 27-37)

1. Media Stream Handler establishes transport session at M4
2. Media Stream Handler requests Media Entry Point from 5GMS AS
3. Media Stream Handler selects Service Operation Point based on configuration and Energy Information
4. Media Stream Handler establishes new transport session with 5GMS AS service location
5. If Service Operation Point changed, Media Stream Handler notifies Media Session Handler with Service Data Flow identification information
6. Media Session Handler modifies energy information collection context in Energy Information Collector

NOTE 2 added: Explains that Service Data Flow description is now explicit based on known IP 5-tuples

1. Similar to step 9, subscribing with explicit Service Data Flow filters based on M4 transport sessions
2. Similar to step 2, subscribing to NF Energy Reports with explicit Service Data Flow filters
3. Similar to step 4, subscribing to AS Energy Reports with explicit Service Data Flow filters
4. Similar to step 24
5. Media streaming occurs between Media Stream Handler and 5GMS AS

6. Gap Analysis (Clause 7.6.4)

Identified architectural gaps:

• Defines two new entities:
• Energy Information AF: Subscribes to NF Energy Information from EIF, receives AS Energy Information from AS, collates and exposes Network Energy Information to Energy Information Collector
• Energy Information Collector (UE function): Acquires configuration from Energy Information AF, subscribes to Network Energy Information, collects UE Energy Information, exposes collected information to UE Application

Specification gap identified:
- TS 23.502 and TS 29.566 lack explicit provision for immediate reporting of energy consumption information as side effect of Neif_EventExposure_Subscribe operation
- Mitigation: Positioning of step 2 in provisioning phase means Energy Information AF likely receives initial NF Energy Report before application session initiation

7. Proposed Normative Changes (New Clause 7.6.5)

Comprehensive normative work proposal:

1. New Stage 2 TS: Generic architecture and procedures for Energy Information AF and Energy Information Collector, defining operations for:
2. Provisioning Energy Information AF (E1)
3. AS Energy Report subscription/exposure (E3)
4. Aggregated network energy information subscription/exposure (E5)

5. Energy information exposure to UE Application (E6)

6. New Stage 3 TS: Network APIs for Energy Information AF and Energy Information Collector at E1, E3, E5, and client API at E6

7. TS 26.501 updates:

8. Instantiation of generic architecture in 5GMS System

9. Collaboration scenarios for 5GMS Use Cases

10. TS 26.506 updates:

11. Instantiation of generic architecture in RTC System

12. Collaboration scenarios for RTC Use Cases

13. TS 26.510 updates:

14. Extensions to M5 procedures and interfaces for energy-related information in Service Access Information

15. TS 26.512 updates:

16. Extensions to E1, E3, E5 procedures for 5GMS System

17. Extensions to client API at M6 for 5GMS-Aware Application

18. TS 26.113 updates:

19. Extensions to E1, E3, E5 procedures for RTC System
20. Extensions to client API at RTC-6 for RTC-Aware Application

8. Summary Update (Clause 7.6.6)

Revised summary emphasizing:
- Generic approach for exposing energy-related information from device, network, and Application Server
- Integration into 5GMS and generalized Media Delivery architecture
- Introduction of two new components: Energy Information Collector (UE) and Energy Information Application Function (Media AF)
- Goal is generic architecture for reuse, not specific optimization strategies

Key Technical Improvements

1. Alignment with existing 3GPP specifications (TS 23.501, TS 29.566)
2. Clear separation of procedure phases (provisioning, initiation, reporting, modification)
3. Explicit Service Data Flow handling (implicit during provisioning, explicit after transport session establishment)
4. Session correlation using Session Identifier throughout procedures
5. Comprehensive reference point definitions (E1, E3, E5, E6, E12, M1, M4, M6, M8, M11)
6. Detailed normative work roadmap across multiple specifications