The present document provides stage 1 use cases and potential 5G requirements on the following aspects regarding enhancements to Energy Efficiency of 5G network and application service enabler aspects:
Defining and supporting energy efficiency criteria as part of communication service to user and application services;
Supporting information exposure of systematic energy consumption or level of energy efficiency to vertical customers;
Gap analysis between the identified potential requirements and existing 5GS requirements or functionalities;
Potential requirements on security, charging and privacy aspects.
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
ETSI ES 202 336-1: "Environmental Engineering (EE); Monitoring and control interface for infrastructure equipment (power, cooling and building environment systems used in telecommunication networks); Part 1: Generic Interface".
ETSI ES 202 336-12: "Environmental Engineering (EE); Monitoring and control interface for infrastructure equipment (power, cooling and building environment systems used in telecommunication networks); Part 12: ICT equipment power, energy and environmental parameters monitoring information model".
ETSI GS OEU 020 (v1.1.1): "Operational energy Efficiency for Users (OEU); Carbon equivalent Intensity measurement; Operational infrastructures; Global KPIs; Global KPIs for ICT Sites".
For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
energy state:
state of a cell, a network element and/or a network function with respect to energy, e.g. (not) energy saving states, which are defined in TS 28.310.
energy charging rate:
a means of determining the energy consumption consequence (use of energy credit) associated with charging events.
energy credit:
a quantity of credit associated with the subscriber that can be used for credit control by the 5G system.
maximum energy consumption:
a policy establishing an upper bound on the quantity of energy consumption by the 5G system in a specific period of time or space, e.g. energy consumption inside a given service area.
maximum energy credit limit:
a policy establishing an upper bound on the aggregate quantity of energy consumption by the 5G system to provide services to a specific subscriber, e.g. in kilowatt hours.
carbon emissions:
kilograms of equivalent carbon dioxide emitted (kg of CO2 equivalent)
carbon intensity:
quantity of CO2 equivalent emission per unit of final energy consumption for an operational period of use [23]
communication service pooling:
refers to an operator serving subscribers from other operators traditionally providing communication service over the same geographical area, but which temporarily stop providing their service over their own network infrastructure for energy saving, e.g. via cell switch-off.
renewable energy:
energy from renewable sources as energy from renewable non-fossil sources, namely wind, solar, aerothermal, geothermal, hydrothermal and ocean energy, hydropower, biomass, landfill gas, sewage treatment plant gas and biogases
For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.
AS
Climate change and global energy shortage are issues that requires international cooperation and coordinated solutions at all levels, many regions and countries have published related policies and requirements to control carbon release and promote energy efficiency. These policies have made energy efficiency a strategic priority for many telecom operators around the world. Energy efficiency has been considered in many standard groups and specifications.
The existing studies concentrate more on how to satisfy user experience and try to achieve energy efficiency at the same time and achieve energy efficiency within the network, so the requirements, use cases and solutions are basically within the network itself. Verticals and customers have no approach for energy efficiency related information from the network.
Introducing energy efficiency as a service will allow users to have the choice to select proper energy efficiency criteria as well as other network performance parameters when they need them, which may include:
Define and support energy efficiency criteria as part of communication service to user and application services.
Provide information exposure on systematic energy consumption or level of energy efficiency to vertical customers.
Such as in satellite and terrestrial convenience scenario, for some regions where both satellite and terrestrial coverage exist, energy saving could be taken as a dimension while providing the communication service, users or operators could have the choice to find out a best way in satisfying both user experience and energy efficiency. From another perspective, the network could also react to different energy consumption modes of applications or adjust network resources.
Both aspects above need more interactions between applications and networks on energy consumption status. It is worth considering how to deliver services with energy efficiency as service criteria, associated with verticals' preferences, and how to support the policy of handling energy as part of a subscription.