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ITU-T Recommendations

Green ICT Standards and Supplements


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Rec. No.TitleSummaryStatusApproval Date
L.1050 Methodology to identify the key equipment in order to assess the environmental impact and e-waste generation of different network architecturesWhile an assessment framework for environmental impacts of the ICT sector does exist (as developed by ITU), best practices for equipment identification, developed specifically to assess the environmental impacts of network architecture remain lacking. In this Recommendation, key equipment in the networks are identified for smoother LCA calculations. Different types of network architecture employ different goods which entail differences in terms of energy usage, e-waste generation as well as environmental footprints. This Recommendation will examine three types of network architectures and suggest an appropriate set of equipment to be considered for each. This Recommendation will support network designers in determining the environmental and circular performance of different network architectures. This Recommendation utilises information compiled from stakeholders which can provide good insights into the specified potential challenge.Consented / Determinedna
Y.4903 Key performance indicators for smart sustainable cities to assess the achievement of sustainable development goalsRecommendation ITU-T Y.4903/L.1603 gives general guidance to cities and provides key performance indicators (KPIs) for smart sustainable cities (SSCs) to help cities achieve sustainable development goals (SDGs). This document provides the most effective means to benchmarking and disseminating best practices in utilizing ICTs and other technologies to enhance cities' sustainability and connect their smart strategies to the SDGs through an inclusive process. These KPIs are designed to evaluate the role and performance of Information Communication Technologies (ICTs) in the three key dimensions of a city: Economics, Environment, and Society and Culture. The Indicators are uniquely coordinated to allow cities to measure their progress on reaching the ambitious targets set by the SDGs. Consented / Determinedna
L.1317 Guidelines on energy efficient blockchain systemsSeveral models have been introduced to calculate the urban energy system and to demonstrate the variants that calibrate the local energy efficiency. This Recommendation focuses on the impact of blockchain in energy efficiency. More specifically, a literature analysis is performed with regard to the understanding of the blockchain energy demands and how these can be optimized. More specifically, the aim of this Recommendation is to summarize on the energy demand of blockchain, to define the blockchain energy model and to depict the energy efficiency parameters that can be calibrated in order to enhance corresponding energy efficiency.Approved2021-11-22
L.1033 Guidance for institutions of higher learning to contribute in the effective life cycle management of e-equipment and e-wasteManaging of e-waste has been a major problem in many countries. Emerging economies still face a multitude of challenges that hinder the effective management of e-equipment and e-waste. Many have no facility suitable to handle e-equipment and e-waste and have inadequate implementation frameworks and structures due to: the lack of quantifiable data and statistics on e-equipment and e-waste, inadequate policies, regulations, standards and enforcement strategies, low stakeholder engagement/collaboration and limited expertise. Institutions of higher learning have a crucial role in leading society through their influence and development of individuals. As societal issues become more complex and the boundaries between academia, industry, and government become unclear, institutions of higher learning must remain the cornerstone to development. Universities, among other higher learning institutions are better placed to ensure that circularity of EEE is achieved so as to minimize the effects of WEEE. The role of universities as examples of institutions of higher learning, is to offer training, carry out research and share knowledge, ideas, research output and innovations developed and applied for their own benefit and for their surrounding communities. Universities have the capacity to develop curriculum on life cycle- economy processes, including e-waste management, for formal training and material for informal and non-formal training. Universities can also join efforts to research and provide reliable information that can be used in policy formulation, development of standards and strategies on imports and exports to the region. This Recommendation aims therefore to be a guide for institutions of higher learning to collaboratively contribute on key aspects of managing e-resources and e-waste. It explores how institutions of Higher learning can engage in EEE circularity by checking their effective involvement in every EEE and WEEE process.Approved2021-10-22
L.1383 Smart energy solutions for city and home applicationsRecommendation ITU-T L.1383 focuses on smart energy solutions in different application scenarios facilitating energy saving and carbon emission reduction. Besides their application in the field of ICT, such as in base stations, data centres and telecom centres, smart energy solutions have been applied in cities and homes as an advanced update to ICTs. Cities play a different role in different parts of the world. With the development of smart energy technologies, it is becoming possible to answer key issues in cities worldwide, prompted by the urgent necessity of GHG emissions reduction. This Recommendation includes specific smart energy applications in cities and homes, such as energy sources and energy management functions. Approved2021-10-07
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 are still under development. Several initiatives, including, inter alia, the Science Based Target Initiative, the United Nations Framework Convention on Climate Change (UNFCCC) Race to Zero, 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 ITU T L.1470. Approved2021-09-22
L.1060 General principles for the green supply chain management of information and communication technology manufacturing industryRecommendation ITU-T L.1060 focuses on establishing general principles for the green supply chain (GSC) management of information and communication technology (ICT) manufacturing industry. It mainly gives the general principles for the green properties including upstream and downstream suppliers, logistics, recycling and utilization based on the product whole life cycle. General requirements such as the green supply chain management strategy, implementation, green production, recycling, and green information disclosure will be proposed as well. Approved2021-07-14
L Suppl. 41 Requirements on energy efficiency measurement models and the role of artificial intelligence and big dataSeveral assessment models have been introduced to calculate the urban energy system and to demonstrate the variants that calibrate the local energy efficiency. Supplement 41 to ITU-T L-series Recommendations focuses on the impact of artificial intelligence (AI) and big data on energy efficiency. More specifically, this Supplement identifies a model that can calculate the energy efficiency in an urban space from an AI and big data perspective. A literature analysis is performed with regard to the identification of existing energy efficiency assessment models under the lens of AI and big data with a special focus on the urban system, which results to an AI taxonomy for energy efficiency and to corresponding jobs (process steps) where big data are involved. This Supplement aims to unveil the requirements for energy efficiency assessment, and the features that affect the energy demand. It attempts to define a unified assessment model for energy efficient cities.Approved2021-05-20
L Suppl. 42 Guidelines on the environmental efficiency of machine learning processes in supply chain managementSupplement 42 to ITU-T L-series Recommendations provides guidelines on the environmental efficiency of machine learning (ML) processes in supply chain management. This guidance document is intended to support machine learning researchers and operators to measure and improve the environmental efficiency of ML, and other emerging technologies (e.g., blockchain, big data, 5G, etc.) use in supply chain management. Approved2021-05-20
L Suppl. 43 Smart energy saving of 5G base stations: Traffic forecasting and strategy optimization of 5G wireless network energy consumption based on artificial intelligence and other emerging technologiesSupplement 43 to ITU-T L-series Recommendations explores how network energy-saving technologies that have emerged since the fourth generation (4G) era, e.g. carrier shutdown, channel shutdown and symbol shutdown, can be leveraged to mitigate fifth generation (5G) energy consumption. The document also analyses how enhanced technologies, e.g., deep sleep and symbol aggregation shutdown, have been developing in the 5G era. Supplement 43 to ITU-T L-series Recommendations details these fundamentals. However, Supplement 43 to ITU-T L-series Recommendations is far from being sufficient; a revolutionized energy-saving solution should be considered. In response to the requirement for an intelligent and self-adaptive energy-saving solution, artificial intelligence (AI) and big data technology are introduced to form a more precise energy-saving strategy based on specific site traffic and other site-related conditions, thus improving the efficiency and reducing the personnel required. More details of an AI-driven smart energy-saving solution are elaborated. Supplement 43 to ITU-T L-series Recommendations could help to achieve the most energy-efficient network with good performance and lower operating expense for mobile network operators (MNOs). Approved2021-05-20
L Suppl. 44 Guidelines on best practices and environment friendly policies for effective information and communication technology deployment methodsIn accordance with the instructions and directives of WTSA-16 on Resolution 73, "Study Group 5 is to develop an appropriate Recommendation on ICTs, the environment and climate change issues within the mandate and competency of ITU T, including telecommunication networks used for monitoring and adapting to climate change", Supplement 44 to ITU-T L-series Recommendations identifies best practices and opportunities for new applications using information and communication technologies (ICTs) to foster environmental sustainability, identify appropriate actions and promote best practices towards implementing environmental friendly policies and practices. Supplement 44 to ITU-T L-series Recommendation also includes a questionnaire that has been developed to gather relative information from stakeholders for use cases and key success factors, including exemplary collection of green best practices to ultimately formulate guidelines on best practices and environment friendly policies for effective ICT deployment methods. Approved2021-05-20
L.1024 The potential impact of selling services instead of equipment on waste creation and the environment – Effects on global information and communication technologyRecommendation ITU-T L.1024 utilizes information compiled from stakeholders that provides insights into cases in the information and communication technology (ICT) ecosystem, in which ICT goods are sold as services or subscriptions rather than products. Currently, these cases are not clearly understood from an environmental point of view. Current estimates are that billions of new ICT goods – smartphones and others – are sold annually and sales are expected to be higher in 2025 than in 2020. Business models based on servitization which would – most effectively – improve the circularity of these ICT goods are not well understood, e.g., prolonging the lifetime or increasing the e-waste collection rate. Approved2021-01-06
L.1031 Guideline for 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 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%. Approved2020-12-14
L.1304 Procurement criteria for sustainable data centresRecommendation ITU-T L.1304 aims to support public authorities in purchasing data centres related products, services and items with reduced environmental impacts through establishing a set of procurement criteria. Approved2020-12-14
L Suppl. 38 Guidance to information and communication technology manufacturers on setting 1.5°C aligned targets compliant with Recommendation ITU-T L.1470Supplement 38 to ITU-T L-series Recommendations supports information and communication technology (ICT) organizations in setting science-based targets for greenhouse gases (GHGs) according to the decarbonization pathways described in detail in Recommendation ITU-T L.1470, aligned with the Special report: Global warming of 1.5°C by the Intergovernmental Panel on Climate Change (IPCC), and is intended for provision to the Science Based Targets Initiative (SBTi) for use as a sectoral target-setting approach. Supplement 38 to ITU-T L-series Recommendations focuses exclusively on ICT manufacturers. Guidance for additional sub-sectors, including semi-conductor manufacturers and printed circuit board (PCB) manufacturers, is for further study. NOTE 1 – The term "ICT manufacturers" refers to organizations that have the financial and organizational control of the design and production of ICT goods, including software providers. NOTE 2 – Guidance for ICT network and datacentre operators have earlier been published as [SBT-I 2020b] and [ITU-T L-Suppl.37]. Approved2020-10-23
L.1023 Assessment method for circular 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 criterion for circular product design (CCPD) for the ICT goods at hand, 2) Assess the margin of improvement (MI) of each criterion, 3) Calculate the circularity score (score) from 0 to 100% for the ICT good at hand for all three circular design guideline groups (CDGGs). This includes: – Using a predefined value matrix to identify the % score from 0 to 100 for each combination of R×MI. – Average the included criteria for the ICT good at hand separately for all three groups: product durability, ability to recycle, repair, reuse, and upgrade from equipment and manufacturer level.Approved2020-09-22
L.1310 Energy efficiency metrics and measurement methods for telecommunication equipmentRecommendation ITU-T L.1310 contains the definition of energy efficiency metrics test procedures, methodologies and measurement profiles required to assess the energy efficiency of telecommunication equipment. Energy efficiency metrics and measurement methods are defined for telecommunication network equipment and small networking equipment. These metrics allow for the comparison of equipment within the same class, e.g., equipment using the same technologies. The comparison of equipment in different classes is out of the scope of this Recommendation.Approved2020-09-22
L.1331 Assessment of mobile network energy efficiencyRecommendation ITU-T L.1331 aims to provide a better understanding of the energy efficiency of mobile networks. The focus of this Recommendation is on the metrics and methods of assessing energy efficiency in operational networks. The networks considered are those whose size and scale could be defined by topologic, geographic or demographic boundaries. This Recommendation explains how to extrapolate the measurements made on partial networks to the level of the total network. Such a simplified approach is proposed as a way of making approximate energy efficiency evaluations at the level of network elements and cannot therefore be considered sufficient for the entire network operation including, for example, transport.Approved2020-09-22
L.1371 A methodology for assessing and scoring the sustainability performance of office buildingsRecommendation ITU-T L.1371 provides a consistent framework for building owners, managers and operators to critically assess, score and improve the sustainability performance of office buildings in 10 key areas: energy; water; air; comfort; health and wellness; purchasing; custodial; waste; site; and stakeholders. The framework described in Recommendation ITU-T L.1371 provides a set of concrete and measurable steps to reduce environmental impacts, and specifically greenhouse gas emissions, of existing office buildings, thus contributing to the achievement of Sustainable Development Goal 11 "Sustainable cities and communities –s Make cities inclusive, safe, resilient and sustainable". The annex to Recommendation ITU-T L.1371 specifies an assessment scoring methodology to allow owners and managers to undertake a self-assessment to evaluate their building's current status and track progress going forward.Approved2020-06-29
L.1381 Smart energy solutions for data centresRecommendation ITU-T L.1381 considers a smart control strategy for the entire energy system, including power-feeding and cooling solutions, of data centres to achieve higher energy efficiency and to decrease overall energy consumption. Firstly, for a multiple energy input system, including photovoltaic (PV) solar panels, wind, fuel cells, the electrical grid, power generators and batteries, can be connected to a system. Recommendation ITU-T L.1381 considers how to control these different energy inputs in a smart way to increase energy efficiency and to decrease carbon emissions. In addition, for smart cooling systems, Recommendation ITU-T L.1381 considers how to use outside cool air and maximize utilization of information and communication technology (ICT) side cooling, e.g., ICT rack cooling, row cooling methods and liquid cooling. Recommendation ITU-T L.1381 focuses on smart energy solutions for data centres to achieve green and sustainable goals, including those which are environmentally friendly, decrease carbon emissions, increase energy efficiency and extend product life.Approved2020-06-29
L.1382 Smart energy solution for telecommunication roomsRecommendation ITU-T L.1382 specifies requirements for the power supply mode of the three-layer architecture of telecommunication rooms. Recommendation ITU-T L.1382 aims to drive future-oriented network deployment for the information and communication technology (ICT) industry, as well as maximizing energy efficiency, the use of renewable resources and social resources in the digital era, and reduce energy and resource consumption. while ensuring network performance and user experience. Innovative ICTs are used to promote network energy saving, emission reduction and circular economy development, as well as continuously driving all parties in the industry chain to jointly build green networks and low-carbon societies. In addition, Recommendation ITU-T L.1382 provides suggestions and requirements on the deployment of three types of telecommunication rooms, which can be used as a reference for operators to build the target network evolution strategies for telecommunication room power supply. Recommendation ITU-T L.1382 accelerates network deployment, reduces capital expenditure (CAPEX) and operating expenditure (OPEX), optimizes investment efficiency, and guides ICT industry transformation and optimization. The new networking architecture, new power supply technologies and specifications in Recommendation ITU-T L.1382 will also effectively promote the upgrade of industry technologies.Approved2020-06-29
L Suppl. 37 Guidance to operators of mobile networks, fixed networks and data centres on setting 1.5°C aligned targets compliant with Recommendation ITU-T L.1470Supplement 37 to ITU-T L-series Recommendations supports information and communication technology (ICT) organizations in setting science-based targets for greenhouse gases (GHGs) according to the decarbonisation pathways, described in detail in ITU-T L.1470 aligned to the IPCC Special Report on 1.5°C and developed to be used as a sectoral target-setting approach by the Science Based Targets Initiative (SBTi). This Supplement focuses exclusively on ICT organizations operating mobile networks, fixed networks and/or data centres. Guidance for further ICT sub-sectors will be covered separately. Approved2020-05-20
L.1470 Greenhouse gas emissions trajectories for the information and communication technology sector compatible with the UNFCCC Paris AgreementRecommendation ITU-T L.1470 provides detailed trajectories of greenhouse gas (GHG) emissions for the global information and communication technology (ICT) sector and sub-sectors that are quantified for the year 2015 and estimated for 2020, 2025 and 2030. In addition, Recommendation ITU-T L.1470 establishes a long-term ambition for 2050. The trajectories, the long-term ambition and the 2015 baseline have been derived in accordance with Recommendation ITU-T L.1450 and through complementary methods in support of the 1.5°C objective described by the IPCC in its Special report: Global warming of 1.5°C and in support of the Science-based Targets (SBT) initiative.Approved2020-01-12
L.1210 Sustainable power-feeding solutions for 5G networksRecommendation ITU-T L.1210 defines power-feeding solutions for 5G, converged wireless and wireline access equipment and networks, taking into consideration their enhanced requirements on service availability and reliability and new deployment scenarios, along with the environmental impact of the proposed solutions. The minimum requirements of different solutions, including power-feeding structures, components, backup, safety requirements and environmental conditions, are also defined. This Recommendation is applicable to the powering of both mobile and fixed access network elements, in particular equipment that have similar configurations and needs. Approved2019-12-22
L.1305 Data centre infrastructure management system based on big data and artificial intelligence technologyRecommendation ITU-T L.1305 contains technical specifications of a data centre infrastructure management (DCIM) system, with the following aspects being covered: principles, management objects, management system schemes, data collection function requirements, operational function requirements, energy saving management, capacity management for information and communication technology (ICT) and facilities, other operational function requirements and intelligent controlling on systems to maximize green energy use. Other aspects such as maintenance function requirements, early alarm and protection based on big data analysis and intelligent controlling on systems to decrease the cost for maintenance are also considered.Approved2019-11-13