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1 Motivation
The electromagnetic environment is changing rapidly because of the increase in the deployment of new types of electric/electronic devices/equipment, the increase of radio devices, and the evolving of the telecommunications/ICTs infrastructure. Examples impacting electromagnetic environment are the deployment of products/devices with higher clock frequencies, the deployment of new radio systems, the increase in the use of wireless power transmission (WPT) systems with high-power radio frequency current, the deployment of new broadband telecommunication services, and the increase of inter-connected devices. Furthermore, the control of the electromagnetic environment is necessary for the development and deployment of innovative products and protection of telecommunications/ICTs networks to address sustainability goals.
On the other hand, the philosophy of EMC standards is to specify the protection of radio services used in close environments but currently it also needs to address the deployment of a high density of radio devices in the same environment, and this will increase the mutual interference and intermodulation cases.
Aspects impacting the electromagnetic environment in telecommunications/ICTs applications are:
- The large deployment of photovoltaic systems and wind turbines for the utilization of natural energies requires the control of the electromagnetic disturbances that may be generated by high-power inverters or switching power units. Similar disturbances can also be generated by switching power converters in electric systems such as air conditioners, ICT equipment, LED lightings, 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/ICT networks, for example:
o The deployment of public Wi-Fi access points in cities, suburbs, and communities;
o The use of wireless Access technologies (UWB, NFC, LTE, IMT-2020, IMT 2030 etc.);
o 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.
- Increase of interconnection of devices for smart cities and intelligent transports;
- Deployment of control and billing devices in smart grids.
Furthermore, wearable devices and wireless systems can be used in the vicinity of telecommunications/ICTs 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/ICT 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 telecommunications/ICTs equipment are studied and published by IEC CISPR and TC77. However, the requirements cannot be directly applied to all telecommunications/ICTs 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 telecommunications/ICTs equipment are essential in ITU-T for keeping quality and reliability of telecommunications/ICTs systems and services.
This Question aims to establish thorough EMC requirements including emission and immunity requirements for telecommunications/ICTs equipment, and countermeasures for facilities to reduce electromagnetic compatibility issues and maintain a controlled electromagnetic environment for telecommunications/ICTs systems and services.
It is also important to define requirements for electric and electronic apparatuses used in telecommunications/ICTs facilities to maintain a suitable electromagnetic environment for telecommunications/ICTs 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.49, K.58, K.59, K.60, K.62, K.63, K.74, K.76, K.79, K.80, K.86, K.92, K.93, K.94, K.106, K.114, K.116, K.127, K.132, K.133, K.136, K.137, K.149, K.152; K.157
- K-series Supplements 10 and 26;
- Handbook on interference measuring techniques, and handbook on mitigation measures for telecommunication installations.
2 Questions
The purpose of this Question is to produce new or revised Recommendations or supplements regarding EMC (emission and immunity) requirements for telecommunications/ICTs installations and equipment - including the wireless and wireline equipment, and electric and electronic equipment installed in telecommunications/ICTs 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.
3 Tasks
Tasks include, but are not limited to:
- Methodology for evaluating the disturbance with radio services from telecommunications/ICTs systems using metallic conductors;
- Estimation of interferences from wireless power transmission (WPT) systems to telecommunications/ICTs systems;
- Definition of EMC requirements for WPT systems;
- Estimation of interferences from grid connected power converter (GCPC) used in, for example, photovoltaic systems;
- Development of EMC requirements for GCPC systems;
- Estimation of interferences from electric charger for EV, or PHEV to telecommunications/ICTs systems in surroundings;
- Evaluation of interferences from telecommunications/ICTs 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 telecommunications/ICTs equipment;
- Definition of emission requirements for electric and electronic equipment, other than ICT equipment, used in telecommunications/ICTs facilities;
- Specifications for preventing mutual-intermodulation (including Passive Intermodulation specifications) in the environment with high density antenna installations;
- EMC specifications taking into account IMT 2020 and IMT 2030 systems;
- Evaluation and prediction methodologies of performance degradation due to electromagnetic disturbances in deploying telecommunications/ICTs equipment in vertical applications, such as power sub-stations, charging stations and railways environment;
- Definition of emission requirements for IoT devices using different interconnecting technologies (e.g., power line communication);
- Maintenance and enhancement of existing Recommendations and supplements on electromagnetic environment and requirements for EMC. This activity is needed to keep up-to-date the EMC Recommendations in line with the latest: basic test methods, CISPR limits, new technologies, etc.
An up-to-date status of work under this Question is contained in the ITU-T SG5 work programme (https://www.itu.int/ITU-T/workprog/wp_search.aspx?sp=18&q=4/5).
4 Relationships
Recommendations:
- G.117, L.75, L.19 and other K-series Recommendations
Questions:
- 1/5, 2/5, 3/5
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
Other bodies:
- IEC CISPR
- IEC TC 77, IEC TC 69
- ETSI ERM EMC WG
- CENELEC TC 210, TC 215 WG2
- IEEE EMC society
- 3GPP RAN4
WSIS Action Lines:
- C2, C5
Sustainable Development Goals
- 7, 9
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