Electromagnetic compatibility (EMC) aspects in ICT environment
(Continuation of Question 4/5)
Motivation
The electromagnetic environment is changing rapidly through the development and installation of new types of electric/electronic equipment and evolving the telecommunication infrastructure. Examples include deployment of products with higher clock frequencies, deployment of new radio systems and use of wireless power transmission (WPT) systems with high power radio frequency current which changes the electromagnetic environment. Focus will be also addressed to electromagnetic aspects for the green growth deployment of ICT.On the other hand, the philosophy of EMC standard specified the protection of radio services used in close environments instead in the future it needs to address the deployment of high density of radio devices in the same environment and this will increase the mutual-interference and intermodulation cases.Aspect impacting the electromagnetic environment in telecommunication applications are:
- The use of switching power converters that is becoming more popular by the deployment of photovoltaic systems and wind turbines for utilization of natural energies. The switching power converter is installed in the electric systems such as air conditioners, power supply for ICT equipment, and LED lightings for power saving, charger for Electric Vehicles (EV) or Plug-in Hybrid EV (PHEV), and so on;
- The popular use of a variety of both wireless and wireline technologies for the exchange of voice and data over short-range connection and telecommunications networks, for example:
- The deployment of public Wi-Fi access points in cities, suburbs and communities;
- The use of wireless Access technologies (Wi-MAX, UWB, NFC, LTE, 5G etc.);
- The use of various type of wireless or wireline equipment such as mobile phones, tablets, mobile data and wideband data access terminal equipment, changes the Electromagnetic (EM) environment.
Furthermore, wearable devices and wireless systems will be used in vicinity of ICT equipment in telecommunication and data centres, and the wearable devices are required to operate correctly in the high-level electromagnetic field.
The situation that ICT equipment is used in the vicinity of radio communications systems will be far more common with the growth of distributed ICT devices. Low transmission rate wireless systems that use distributed ICT devices for transmitting data from various kinds of sensors may become candidates of victim devices by disturbance from telecommunication networks.
Hence, it is necessary to study methodologies for predicting and mitigating EMC problems that might impact the operation of these technologies.
The EMC requirements for general ICT equipment are studied and published by IEC CISPR and TC77. However, the requirements cannot be directly applied for all ICT equipment as the convergence of information technology (IT) and communication equipment, because they do not always consider influences on wired/wireless communications and characteristics of sensitive equipment in telecommunication and data centres. Therefore, studies on the EMC requirements for ICT equipment are essential in ITU-T for keeping quality and reliability of ICT systems and services.
This question aims to establish thorough EMC requirements including emission and immunity requirements for ICT equipment, and countermeasures for facilities to reduce electromagnetic compatibility issues and maintain a controlled electromagnetic environment for ICT systems and services.
It is also important to define requirements for electric and electronic apparatuses used in ICT facilities to maintain a suitable electromagnetic environment for ICT systems.The following Recommendations and handbooks, in force at the time of approval of this Question, fall under its responsibility:
- ITU-T K.10, K.18, K.23, K.24, K.34, K.37, K.38, K.42, K.43, K.48, K.49, K.58, K.59, K.60, K.62, K.63, K.74, K.76, K.79, K.80, K.85, K.86, K.88, K.92, K.93, K.94, K.106, K.114, K.116, K.123, K.127, K.132, K.133, K.136, K.137, K.141;
- K.Supplement 10;
- Handbook on interference measuring techniques, and handbook on mitigation measures for telecommunication installations.
Question
The purpose of this Question is to produce new or revised Recommendations or Supplements regarding EMC (emission and immunity) requirements for ICT installations and equipment - including both the wireless and wireline equipment, and electric and electronic equipment installed in telecommunication facilities.
Measures to prevent interferences between broadband signals in telecommunication and power lines, and radio signals will be studied. Guidance on procedure to solve the problem and mitigation measures will be also recommended.
Tasks
Tasks include, but are not limited to:
- Methodology for evaluating the leakage and impact of radio frequency noise from telecommunication systems using metallic conductors;
- Estimation of interferences from wireless power transmission (WPT) systems to telecommunication systems;
- New Recommendation on EMC requirements for WPT systems;
- Estimation of interferences from grid connected power converter (GCPC) used in photovoltaic systems etc.;
- Development of EMC requirements for GCPC systems;
- Estimation of interferences from electric charger for EV, or PHEV to telecommunication systems in surroundings;
- Evaluation of interferences from telecommunication systems to low rate wireless systems for distributed ICT devices;
- Evaluation and prediction methodology of performance degradation due to electromagnetic interference between wireless and wireline services;
- Evaluation and mitigation methodology of electromagnetic disturbance and performance criteria between different modules in converged telecommunication equipment;
- Definition of emission requirements for electric and electronic equipment, other than ICT equipment, used in telecommunication facilities;
- Development of Recommendations on electromagnetic environment related to body worn wireless equipment and radio devices attached to apparatuses;
- Specifications for preventing mutual-intermodulation (including Passive Intermodulation specifications) in the environment with high density antenna installations;
- EMC specifications taking into account 5G technologies;
- Evaluation and prediction methodologies of performance degradation due to electromagnetic disturbances in deploying ICT equipment in vertical applications, such as power sub-stations, charging stations and railways environment;
- New recommendation on emission requirements for IoT devices using different interconnecting technologies (e.g. power line communication);
- Maintenance and enhancement of existing Recommendations and new Supplements on electromagnetic environment and requirements for EMC.
An up-to-date status of work under this Question is contained in the ITU-T SG5 work programme
(https://1f8a81b9b0707b63-19211.webchannel-proxy.scarabresearch.com/ITU-T/workprog/wp_search.aspx?q=4/5).
Relationships Sustainable Development Goals: Recommendations:
- G.117, L.75, L.19 and other K-series
- Q1/5, Q2/5, Q3/5
Study Groups:
- ITU-T SGs
- ITU-R SGs, in particular taking into account the ITU-R studies on the impact of WPT for electric vehicles on radiocommunication services
- ITU-D SGs
Standardization bodies:
- IEC CISPR
- IEC TC 77, IEC TC 69
- ETSI ERM EMC WG
- CENELEC TC210, TC215 WG2
- IEEE EMC society
- 3GPP RAN4
