Committed to connecting the world

SDG Digital

ITU-T Recommendations

Green ICT Standards and Supplements

Goto Page:
Rec. No.TitleSummaryStatusApproval Date
L.1031 Guideline for the development of an e-waste management system and achieving the e-waste targets of the Connect 2030 AgendaRecommendation ITU-T L.1031 describes a three-step approach to achieve the e-waste targets set in the Connect 2030 Agenda. These steps consist of guidance on developing an e-waste inventory, approaches to design e-waste prevention and reduction programmes and the supportive measures required for successfully implementing the Connect 2030 e-waste targets. This Recommendation is intended to be utilized by relevant stakeholders, for example: national authorities in charge of ICTs and communications, e-waste and waste management authorities, ministries of the environment, local authorities and entities involved in e-waste management, to take their first step in addressing Target 3.2 of the Connect 2030 Agenda that is to increase the global e-waste recycling rate to 30% and Target 3.3 that is to raise the percentage of countries with e-waste legislation to 50%.Consented / Determinedna
L.1307 Energy Efficiency in Micro Data Centre for Edge ComputingWith the advent of the Artificial Intelligence era, the demands for edge computing to provide ultra-low latency for various services that require high computation power continue to grow. The demand for micro data centres, an essential equipment for delivering edge computing services near users, is also growing. This Recommendation presents considerations on micro data centres for edge computing services in energy efficiency aspects. In addition, it presents the management information needed to manage micro data centres' energy efficiently and provides a metric for evaluating the energy performance of micro data centres. Finally, it presents the energy efficiency issues in the operation of edge computing services and methods to solve them.Consented / Determinedna
L.1362 Power management capabilities of the future energy telecommunication network nodes. Enhanced interface for power management in Network Function Virtualization (NFV) environmentsRecommendation ITU-T L.1362 specifies a data model for energy discrete states within virtualized networks, and operations to interact on this model. In virtualized networks, establishing a mapping between the energy discrete states of logical entities (e.g., virtualized network functions) and the energy consumption of the hardware hosting the virtual machines that execute these logical entities is a challenging task. Recommendation ITU-T L.1362 adapts the green abstraction layer specification (GALv1) to virtualized networks.Consented / Determinedna
L.1391 Specification of 5G network sharing and co-construction adapting to climate change mitigationThe Mobile Network Operators (MNOs) around the world are facing unprecedented difficulties in 5G deployment. Restricted by the expensive spectrum resources, high investment, and high energy consumption of 5G, the profit gap between operators and equipment manufacturers is growing, and a large number of “business increment with no revenue increasing” problems are arising. How to reduce the cost of network construction and operation and how to adapt to climate change mitigation and enable the rapid benefits of 5G especially in the underdeveloped communications regions, imposes a major challenge to the global industry and operators. This Recommendation identifies the specification of 5G network sharing and co-construction and the contribution of 5G network sharing and co-construction to climate change mitigation, provides the key technologies of 5G network sharing and co-construction and explain how to make assessment of these technologies to adapt to the climate change. It also addresses the cost-benefit analysis and best practice of 5G network sharing and co-construction.Consented / Determinedna
L.1508 Framework for climate change adaptation in coastal cities using ICT and digital technologiesCoastal cities and areas are particularly vulnerable to the impacts of climate change, including flooding, rising sea level, storm surge, precipitation, and more. The frequency and intensity of these impacts continue to deepen, as a result of climate change. It is, therefore, imperative that coastal cities and areas are proactively taking climate adaptation actions to minimize these impacts. Information and Communication Technologies, as well as digital transformation, are providing innovative solutions for accelerating climate adaptation. The objective of this Recommendation is to support coastal cities and areas to adopt these technologies and enhance climate resilience.Consented / Determinedna
L.1640 Methodology for dynamic monitoring and analysis of greenhouse gas emissions in cityIn 2015, the UN approved the 2030 Agenda for Sustainable Development, which contains global sustainable development goals (SDGs), including sustainable cities and communities (SDG11) and climate action (SDG13). In the era of economic globalization, cities consume a large amount of raw materials and energy, resulting in negative environmental effects such as greenhouse effect and ozone depletion. Therefore, low-carbon development and analysis of greenhouse gas (GHG) emissions have gradually become an important factor for strategy and policy making. This document proposes a methodology for dynamic monitoring and analysis for low-carbon development of cities through multivariate data, data collection, data processing, data fusion and application methods. This Recommendation presents the necessary conditions for implementing near-real-time greenhouse gas monitoring in cities, to support the sustainable development strategy and planning of the city. Compared to existing research or standards, near-real-time greenhouse gas data in cities can present high temporal resolution characteristics of urban emissions (hourly or daily), enabling better identification of spatial and temporal hotspots. This can help city managers formulate more effective emission reduction policies. Recommendation ITU-T L.1640 presents the general principles on data collection, data processing, data fusion, and monitoring and analyzing GHG emissions of cities and outlines the different methodologies that are being developed: – Sources for near-real-time city data collection, and its processing and fusing. – Key steps for city near-real-time GHG calculation and attribution analysis. – Optimization strategy for city sustainable planning.Consented / Determinedna
L.1070 Global digital sustainable product passport opportunities to achieve a circular economyThis Recommendation provides an overview of global and common opportunities to represent sustainability, mainly environmental-related, details about digital technology products, either collective ICT product models, batches or individual ICT product items. These product details are intended to be represented in digital format instead of paper-based. The details can represent design-related information, products at the time of manufacturing, including relevant information for product transparency and a potential for a circular lifecycle, such as details related to the origin of materials composition, design, manufacturing, energy consumption, maintenance, repair, preparation for reuse, final recycling, and may include links to related documentation. Product details can include or relate to details that change over the lifespan of a product as a result of reconfiguration events, including repair, upgrade, usage, sale, and final recycling. The details should exclude any personal or business-sensitive information. The Recommendation provides an overview of sustainability opportunities, environmental related, about product-related digital information common to all ICT products, with global scope for harmonisation, i.e. relevant to any region, that can support the development of the circular economy of ICT products. The product-related digital information can be represented under digital technology, such as product identifiers, data formats, linked data, and system architectures. It relates to and can complement regional and global standards.Approved2023-11-06
L.1241 Methodologies for evaluating the functionality and performance of power supply units configured for serversRecommendation ITU-T L.1241 provides comprehensive evaluation methods of power supply units configured for servers to evaluate electrical performances, functionalities and safety aspects. Approved2023-09-22
L.1631 Reference model for firefighting infrastructure management systems for buildings in sustainable citiesRecommendation ITU-T L.1631 provides an overview of a firefighting infrastructure management system (FIMS), defines the reference model of the FIMS, and provides use cases for the FIMS for buildings in sustainable cities. Approved2023-09-22
L.1023 Assessment method for circularity performance scoringRecommendation ITU-T L.1023 outlines an assessment method for circularity scoring of information and communication technology (ICT) goods. The assessment method consists of three steps: 1) Setting the relevance and applicability (R) of each circularity indicator for the ICT goods at hand. 2) Assessing the margin of improvement (MI) of each circularity indicator. 3) Calculating the circularity score (score) from 0 to 100% for the ICT good at hand for all three circularity aspects. This includes: –Using a predefined value matrix to identify the % score from 0 to 100 for each combination of R×MI. –Calculating the average of the included circularity indicators for the ICT good at hand separately for all three circularity aspects: product durability, ability to recycle, repair, reuse, and ability to upgrade from equipment and manufacturer level.Approved2023-08-13
L.1027 Assessment of material efficiency of ICT network infrastructure goods (circular economy) – Server and data storage product disassembly and disassembly instructionRecommendation ITU-T L.1027 contains methods to assess the ability to disassemble certain key components of servers and data storage products, and the provision of information on these disassembly operations. It places a special emphasis on aspects relevant to the circular economy, such as fostering durability and reparability, in particular by third parties. Approved2023-08-13
L.1326 Requirements and use cases of liquid cooling solutions and high energy efficiency solutions for 5G BBU in centralized-RAN modeLiquid cooling systems are mainly used for processing high thermal power density which exceeds the physical limits of air-cooling methods, to support application scenarios where manufacturers are creating competitive advantages. Liquid cooling can provide heat transfer capabilities several orders of magnitude higher than those of air cooling, and applications dealing with high heat density in the core and in edge computing as well as in access networks will increasingly require the support of liquid cooling technology. Recommendation ITU-T L.1326 identifies the requirements for liquid cooling and high energy efficiency solutions for 5G BBU in centralized-RAN mode, including requirements of immersion and spray liquid cooling technology, key indicators of immersion and spray liquid, safety requirements of immersion and spray liquid cooling system, management procedure and an energy efficiency measurement method, and use cases of liquid cooling solutions. In this Recommendation, a complete infrastructure solution in 5G BBU is proposed that can provide safe and efficient liquid cooling technical support, which can assist in the design of full liquid cooling facilities as well as the successful introduction of liquid cooling solutions to existing air-cooling telecommunication rooms and data centres. Approved2023-08-13
L.1471 Guidance and criteria for information and communication technology organizations on setting Net Zero targets and strategiesCurrently, the definitions of Net Zero and related concepts such as carbon neutrality and climate neutrality for organizations remain under development. Several initiatives, including, inter alia, the Science Based Target Initiative, the United Nations Framework Convention on Climate Change (UNFCCC) Race to Zero, the UN High-level Expert Group on Credibility and Accountability of NetZero Emissions Commitments of Non-State Entities (HLEG), ISO IWA42, ISO TC 207, and the Net Zero Initiative are working on defining or aligning the different views of these concepts to avoid confusion and reduce risks for green washing. Recommendation ITU-T L.1471 seeks to guide information and communication technology (ICT) organizations in clarifying the meaning of Net Zero in the context of the ICT sector and setting Net Zero targets and strategies. It also identifies actions that would lead the sector towards Net Zero according to the trajectories described in Recommendation ITUT L.1470. Approved2023-08-13
L Suppl. 57 ITU-T L.1420 - Scope 3 guidance for telecommunication operatorsScope 3 emissions from telecommunication operators are the indirect emissions of their value chain, including their supply chain and products used by customers. Estimating Scope 3 emissions is difficult since this refers to emission sources outside a company’s direct control. Scope 3 emissions cover a wide range of economic activities that are divided into 15 Categories. This Supplement establishes guidance to harmonize methods for telecommunication operators to assess and report their Scope 3 Greenhouse Gas (GHG) emissions, and to increase coverage and transparency. This guidance prioritises Categories 1 to 2 and 11 of the GHG Protocol (which addresses the life cycle impact of company portfolios) in particular and Category 3 (which is closely linked to Scope 1 and 2), although all Categories are addressed.Approved2023-06-23
L.1061 Circular public procurement of information and communication technologiesGreen procurement policies, which focus on purchasing durable information and communication technology (ICT) equipment and recycling e-waste, can help reduce emissions and resource extractions and influence the market by increasing demand and stimulating research and product development. Recommendation ITU-T L.1061 provides technical guidance to public sector organizations on improving their procurement practices to purchase more circular ICT goods and services. The Recommendation covers the purchase of ICT equipment such as personal computers, terminals, network equipment and servers, and imaging equipment, and recommends specific requirements in procurement to (1) minimize the generation of e-waste and its adverse effects; (2) maximize the use of energy-efficient equipment; (3) maximize the useful life of equipment; and (4) maximize recyclability. It also covers design for e waste prevention and procurement recommendations which are relevant for the management choices of the e-waste hierarchy, as well as specific requirements and guidance on procurement to enhance the energy efficiency, reduce greenhouse gas (GHG) emissions to mitigate climate change and reduce the emissions of hazardous substances in e-waste. Approved2023-03-28
L.1400 Overview and general principles of methodologies for assessing the environmental impact of information and communication technologiesRecommendation ITU-T L.1400 presents the general principles on assessing the environmental impact of information and communication technologies (ICTs) and outlines the different methodologies that have been developed in the L.1400-series: • Assessment of the environmental impact of ICT goods, networks and services • Assessment of the environmental impact of ICT projects • Assessment of the environmental impact of ICT in organizations • Assessment of the environmental impact of ICT in cities • Assessment of the environmental impact of the ICT sector • Assessment on how the use of ICT solutions impacts greenhouse gas (GHG) emissions of other sectors • Decarbonization trajectories for the ICT sector • Net zero guidance for ICT organizations • Guidance on how to address the ITU's Connect 20xx targets The Recommendation describes the intended usage of each Recommendation and the connections between them. Finally, it lists ongoing work items.Approved2023-03-22
L.1306 Specification of an edge data centre infrastructureRecommendation ITU-T L.1306 defines systematic requirements for infrastructure equipment utilized in the edge data centre including information and communications technology (ICT) equipment, power feeding system, cooling system, monitoring system, etc. to get green, safe, reliable, smart energy saving.Approved2023-02-22
L.1630 Framework of a building infrastructure management system for sustainable citiesOne of the sustainable development goals of a sustainable city is to build resilient and safe city assets. Building is one of the key city assets and is closely related to the circular and sustainable city. Typically, energy and firefighting equipment are key items of equipment within the building infrastructure and may affect the safety of people. Currently, many items of energy and firefighting equipment are separately deployed and managed, so there exist gaps between energy equipment management and firefighting equipment management. Recommendation ITU-T L.1630 defines the framework of a building infrastructure management system which improves the sustainability of a city, particularly of buildings as a city asset. The framework provides a holistic management of building infrastructure. It also presents service use cases composed of functional elements.Approved2023-01-13
L.1481 Guidance on how to address the Connect 2030 targets on net greenhouse gas abatementRecommendation ITU-T L.1481 provides guidelines on how to address the Connect 2030 target on net telecommunication/ICT-enabled greenhouse gas (GHG) abatement. It is intended to be utilized by relevant stakeholders of the Connect 2030 ambitions, while considering the sustainable development goal (SDG) 13 and the objectives of the Paris Agreement and the Glasgow Climate Pact. It also presents examples of information and communication technology (ICT) solutions associated with a potential reduction of GHG emissions in other sectors. Approved2022-12-07
L.1480 Enabling the Net Zero transition: Assessing how the use of information and communication technology solutions impact greenhouse gas emissions of other sectorsRecommendation ITU-T L.1480 provides a methodology for assessing how the use of information and communication technology (ICT) solutions impacts greenhouse gas (GHG) emissions of other sectors. More specifically, the methodology provides guidance on the assessment of the use of ICT solutions covering the net second order effect (i.e., the resulting second order effect after accounting for emissions due to the first order effects of the ICT solution), and the higher order effects such as rebound. By providing a structured methodological approach, it aims to improve the consistency, transparency and comprehensiveness of assessments of how the use of ICT solutions impacts GHG emissions over time. Guidance is provided to assess the net second order effect and higher order effects of the following cases: – ICT solution(s) implemented in a specific context by the user of the ICT solution(s). – ICT solution(s) implemented at different scales, including at an organizational level (whether private or public organizations), at a city level, at a country level or at worldwide level. – ICT solution(s) seen from the perspective of an ICT organization contributing to the ICT solution(s). This includes: • Assessment of the aggregated effect of all ICT solutions provided by an ICT organization across all its customers; • Assessment of the aggregated effect of one or several ICT solutions provided by an ICT organization across some of its customers; • Assessment of the effect of one or more specific ICT solutions implemented in an actual context for a specific customer. Approved2022-12-05
L Suppl. 52 Computer processing, data management and energy perspectiveSupplement 52 to ITU-T L-series Recommendations proposes a set of good practices to improve the energy efficiency of cyber-physical applications – making use of Internet of things (IoT), artificial intelligence (AI), and digital twins. First, the Supplement introduces the cyber-physical paradigm, engineering reference framework, and a couple of system deployments models. Secondly, it defines three end-to-end use case typologies to be addressed (i.e., monitoring applications using smart IoT systems and AI software; smart applications using Edge computing and cloud data centre; and simulation applications using digital twin pattern). Energy efficiency practices are discussed adopting a circular value-chain model that consists of three main steps: data storage; data transfer/move; and data processing/analytics. Finally, this Supplement offers a set of recommended practices relating to each component of the three end-to-end use case typologies.Approved2022-10-27
L Suppl. 53 Guidelines on the implementation of environmental efficiency criteria for artificial intelligence and other emerging technologiesSupplement 53 to ITU-T L-series Recommendations provides guidelines to policy-makers, technologists, innovators, environmentalists and other stakeholders from the technology industry, environmental sciences and policy arena on the topic of environmental efficiency criteria to assess the environmental impacts of artificial intelligence and other emerging technologies. These guidelines aim to serve as common factors for the above-mentioned stakeholders to consider while developing, deploying and promoting any piece of technology into the market and society, rather providing than a comprehensive list of criteria. While "emerging technologies" is a broad term, this Supplement identifies a few sample technologies through their accordant applications and areas of work in 16 applicable industry domains, which stakeholders can use as references to improve the environmental efficiency of their own technological products and/or services. When discussing environmental efficiency, this Supplement approaches environmental efficiency criteria from an adjusted model of life-cycle assessment of a product, within which three stages of environmental impacts – materials, use and end of life – are examined. The Supplement provides both long-term and short-term strategies, which include not only specific examples for certain technologies addressing the three stages of environmental efficiency, but also an instrument to be used to localize such guidelines as well as to allow global benchmarking. Approved2022-10-27
L Suppl. 54 Guidance for assessing the greenhouse gas emissions consequences of the financial effects generated by information and communication technologySupplement 54 to ITU-T L-series Recommendations provides a guidance for assessing the greenhouse gas (GHG) emissions consequences of the financial effects (gains or losses) generated by information and communication technologies (ICT), separately considering the user and the vendor financial benefits or losses from the solution. It thus assesses the GHG impact of this common case of rebound effect due to changes in behaviour.Approved2022-10-27
L Suppl. 55 Environmental efficiency and impacts on United Nations Sustainable Development Goals of data centres and cloud computingSupplement 55 to ITU-T L-series Recommendations explores the environmental sustainability of data centres during their entire life cycle, factoring in a broad spectrum of energy and environmental aspects that needs to be addressed to achieve the relevant United Nations Sustainable Development Goals, to support the development of sustainable data centres and cloud-computing services. An integrated approach addressing both technical and implementation challenges is applied to yield actionable insights to policy makers and industry experts. As the role of data centres and cloud computing increases, so are the concerns over their energy use and its cost, as well as the associated impacts on climate change and environment. In recent years, the data centre and cloud industry has made great progress in enhancing energy efficiency and adopting renewable energy sources. However, a sole focus on energy efficiency may cause burden shifting and overlook other relevant environmental impacts stemming from other parts of the data centre life cycle and cloud-computing value chain. Approved2022-10-27
L Suppl. 56 Guidelines for connecting cities and communities with the Sustainable Development GoalsCities around the world are looking to make meaningful progress and, following the COVID-19 global pandemic, resume their course to achieve the Sustainable Development Goals. At the same time, digital technologies and information and communication technologies (ICTs) continue to transform the urban ecosystem, providing new sustainability opportunities across all sectors. The case studies contained in this Supplement capture some of the most successful measures and initiatives adopted by cities around world in their journey to become more sustainable using ICTs. This Supplement propels these case studies into the global spotlight for adoption.Approved2022-10-27