3GPP TSG-SA5 Meeting #154	S5-241833 Changsha, China, 15 - 19 April 2024	(revision of S5-23xxxx)

Source:	Huawei

Title:	New SID on charging aspects of energy efficiency

Document for:	Approval

Agenda Item:	7.2

3GPP™ Work Item Description

Information on Work Items can be found at http://www.3gpp.org/Work-Items
See also the 3GPP Working Procedures, article 39 and the TSG Working Methods in 3GPP TR 21.900

Title: New SID on Charging Aspects of Energy Efficiency

Acronym: FS_Energy_CH

Unique identifier:

Potential target Release:	Rel-19

1	Impacts

{For Normative work, identify the anticipated impacts. For a Study, identify the scope of the study}

Affects:	UICC apps	ME	AN	CN	Others (specify)
Yes	X	X
No	X	X	X
Don't know

2	Classification of the Work Item and linked work items

2.1	Primary classification

This work item is a …

X	Study
Normative – Stage 1
Normative – Stage 2
Normative – Stage 3
Normative – Other*

* Other = e.g. testing

2.2	Parent Work Item

For a brand-new topic, use “N/A” in the table below. Otherwise indicate the parent Work Item.

Parent Work / Study Items
Acronym	Working Group	Unique ID	Title (as in 3GPP Work Plan)

2.3	Other related Work Items and dependencies

Other related Work /Study Items (if any)
Unique ID	Title	Nature of relationship
940036	Study on new aspects of EE for 5G networks Phase 2	The Rel-18 study in SA5 on 5G energy efficiency and energy saving.
940037	Enhancements of EE for 5G Phase 2	The Rel-18 work item in SA5 on 5G energy efficiency and energy saving.
960019	Study on Energy Efficiency as service criteria	The Rel-19 study in SA1 describes use cases and potential requirements in relation with this study.
1000033	Energy Efficiency as Service Criteria	The Rel-19 work item in SA1 provides Stage 1 requirements in relation with this study.
1010029	study on 5GS Enhancement for Energy Efficiency and Energy Saving as a Service criteria	The Rel-19 study in SA2 studies potential enhancements to the 5G system in relation with this study.
1020021	Study on energy efficiency and energy saving aspects of 5G networks and services	The Rel-19 study in SA5 OAM studies potential enhancements to the 5G OAM system in relation with this study.

3	Justification

Energy efficiency, the ratio between the useful output and input of an energy conversion process, is the hot topic in 3GPP.

According to the service requirements specified by SA1 in Clause 6.15a TS 22.261, there are four types of requirement that have potential relevance to the charging aspects of energy efficiency.

-	Associate energy consumption information with charging information or apply energy credit limit policy.

“Subject to operator’s policy, the 5G system shall support a means to associate energy consumption information with charging information based on subscription policies for services without QoS criteria. It is assumed charging events are assigned a corresponding energy consumption and this is compared against a policy of energy credit limit.” Clause 6.15a.2.2

-	Report energy related information as part of charging information.

“The 5G system shall provide a mechanism to include Energy related information as part of charging information.” Clause 6.15a.2.2

-	Support different charging mechanisms based on the different energy states.

“The 5G system shall support different charging mechanisms based on the different energy states of network elements and network functions.” Clause 6.15a.3

-	Collect charging information associated with serving UEs of other operators for the purpose of saving energy.

“Subject to regulatory requirements and operators’ policies, the 5G system shall enable an operator to temporarily serve UEs of other operators within a geographical area for the purpose of saving energy of the other operators. It is assumed that the 5G system can collect charging information associated with serving UEs of other operators.” Clause 6.15a.6

According to SA5 OAM, a few energy related KPIs can be collected by OAM, as specified in TS 28.554 and TS 28.310, e.g. the Energy Consumption and Energy Efficiency of a network slice.

In the meantime, SA2 and SA5 OAM also have ongoing Rel-19 study items that are related to the SA1 service requirements on energy efficiency, i.e.

-	SA2 Rel-19 study on 5GS Enhancement for Energy Efficiency and Energy Saving as a Service criteria (FS_5G_Energy).

-	SA5 Rel-19 study on Energy Efficiency and Energy Saving as Service Criteria from the OAM aspect (FS_Energy_OAM_Ph3).

It is proposed for SA5 to start the study on charging aspects of energy efficiency based on the existing service requirements specified by SA1 and energy related KPIs collected by OAM.

4	Objective

The objective of the study item is to investigate the following charging aspects of energy efficiency:

WT-1: Identify the charging scenarios based on service requirements.

-	WT-1.1: Identify the business scenario of exposing energy related information.

-	WT-1.2: Identify the business scenario of associating energy consumption information to the chargeable event.

TU estimates and dependencies

Work Task ID	TU Estimate (Study)	TU Estimate (Normative)	RAN Dependency (Yes/No/Maybe)	SA Dependency (Yes/No/Maybe)	Non-3GPP Dependency
WT-1	3	3	No	Maybe	No

Total TU estimates for the study phase: 3

Total TU estimates for the normative phase: 3

Total TU estimates: 6

5	Expected Output and Time scale

New specifications {One line per specification. Create/delete lines as needed}
Type	TS/TR number	Title	For info at TSG#	For approval at TSG#	Rapporteur
Internal TR	TR 28.xxx	Study on charging aspects of energy efficiency	TSG SA #105 (Sep, 2024)	TSG SA #106 (Dec, 2024)

Impacted existing TS/TR {One line per specification. Create/delete lines as needed}
TS/TR No.	Description of change	Target completion plenary#	Remarks

6	Work item Rapporteur(s)

7	Work item leadership

SA5

8	Aspects that involve other WGs

SA2 for the energy related information and 5GC network architecture.

9	Supporting Individual Members

Supporting IM name
HiSilicon
Huawei
Nokia
China Mobile
Verizon
MATRIXX Software