Standard

An object identifier (OID) is an identifier to name an object in a hierarchically assigned namespace. In the Internet of things (IoT), thousands of IoT resources will be intricately provided as fusion types of various services. For the thousands of IoT resources, object identifiers (OIDs) can provide a resolution framework with unlimited scalability. On the other hand, IoT resources need to secure their data, so the distributed ledger technology (DLT) can guarantee its integrity. In consequence, the convergence of DLT and OIDs provides a good solution for identifying secured data of IoT resources. Recommendation ITU-T Y.4476 therefore specifies a resolution framework for the transactions of a distributed ledger assigned to IoT resources. Recommendation ITU-T Y.4476 also describes the concepts, functional requirements, architecture and procedures of an OID-based resolution framework by using DLT.

This Recommendation defines the reference framework and high-level requirements of smart city platforms. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation.

This work item focuses on identifying the necessary support provided by Multi-access Edge Computing for V2X applications. The work will be a study with the intent to collect and analyse the relevant V2X use cases (including the findings from external organisations), evaluate the gaps from the defined MEC features and functions, and identify the new requirements including new features and functions.When necessary, this may include identifying new multi-access edge services or interfaces, as well as changes to existing multi-access edge services or interfaces, data models, application rules and requirements. The work item will recommend the necessary normative work to close these gaps if identified.

This recommended practice outlines best practices and requirements for the development of designs of human-subject experiments in human-robot interaction research.

This document defines terms in the field of information technology.

Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock

IEC 60068-2-1:2007 Deals with cold tests applicable to both non heat-dissipating and heat-dissipating specimens. For non heat-dissipating specimens, Tests Ab and Ad do not deviate essentially from earlier issues. Test Ae has been added primarily for testing equipment that requires being operational throughout the test, including the conditioning periods. The object of the cold test is limited to the determination of the ability of components, equipment or other articles to be used, transported or stored at low temperature. Cold tests cover by this standard do not enable the ability of specimens to withstand or operate during the temperature variations to be assessed. In this case, it would be necessary to use IEC 60068-2-14. The cold tests are subdivided as follows:- Cold tests for non heat-dissipating specimens: * with gradual change of temperature, Ab. - Cold test for heat-dissipating specimens: * with gradual change of temperature, Ad,* with gradual change of temperature, specimen powered throughout, Ae.The procedures given in this standard are normally intended for specimens that achieve temperature stability during the performance of the test procedure. Temperature chamber(s) are constructed and verified in accordance with specifications IEC 60068-3-5 and IEC 60068-3-7. Further guidance for dry heat and cold tests can be found in IEC 60068-3-1 and general guidance in IEC 60068-1. This sixth edition deals with cold tests applicable both to non heat-dissipating and heat-dissipating specimens. For non heat-dissipating specimens, Tests Ab and Ad do not deviate essentially from earlier issues. Test Ae has been added primary for testing equipment that requires being operational throughout the test including the conditioning periods.

IEC 60664-1:2020 deals with insulation coordination for equipment having a rated voltage up to AC 1 000 V or DC 1 500 V connected to low-voltage supply systems. This document applies to frequencies up to 30 kHz. It applies to equipment for use up to 2 000 m above sea level and provides guidance for use at higher altitudes. It provides requirements for technical committees to determine clearances, creepage distances and criteria for solid insulation. It includes methods of electrical testing with respect to insulation coordination. The minimum clearances specified in this document do not apply where ionized gases are present. Special requirements for such situations can be specified at the discretion of the relevant technical committee. This document does not deal with distances:– through liquid insulation. – through gases other than air. – through compressed air.This edition includes the following significant technical changes with respect to the previous edition:update of the Scope, Clauses 2 and 3,addition of 1 500 V DC into tables,new structure for Clauses 4 and 5,addition of Annex G with a flowchart for clearances,addition of Annex H with a flowchart for creepage distances,update of distances altitude correction in a new Table F.10.

This part of lEC 60320 sets the general requirements for appliance couplers for two poles andtwo poles with earth contact and for the connection of electrical devices for household andsimilar onto the mains supply.This document is also valid for appliance inlets/appliance outlets integrated or incorporated inappliances.The rated voltage does not exceed 250 V (AC) and the rated current does not exceed 16 A.Appliance couplers complying with this document are suitable for normal use at ambienttemperatures not normally exceeding +40 °C, but their average over a period of 24 h does notexceed +35 °C, with a lower limit of the ambient air temperature of −5 °C.Annex E provides test requirements for derating the operating current of an accessory whenused in ambient temperatures above +35 °C up to and including +90 °C.Appliance couplers are not suitable for:– use in place of plug and socket-outlet systems according to IEC 60884-1. – use in place of devices for connecting luminaires (DCLs) according to IEC 61995 orluminaire supporting couplers (LSCs). – use in place of installation couplers according to IEC 61535.

IEC TR 63074:2019 gives guidance on the use of IEC 62443 (all parts) related to those aspects of security threats and vulnerabilities that could influence functional safety implemented and realized by safety-related control systems (SCS) and could lead to the loss of the ability to maintain safe operation of a machine.Considered security aspects of the machine with potential relation to SCS are:– vulnerabilities of the SCS either directly or indirectly through the other parts of the machine which can be exploited by security threats that can result in security attacks (security breach). – influence on the safety characteristics and ability of the SCS to properly perform its function(s). – typical use case definition and application of a corresponding threat model.

IEC 62443-3-2:2020 establishes requirements for:• defining a system under consideration (SUC) for an industrial automation and control system (IACS). • partitioning the SUC into zones and conduits. • assessing risk for each zone and conduit. • establishing the target security level (SL-T) for each zone and conduit; and• documenting the security requirements.

IEC 61784-3:2021 explains some common principles that can be used in the transmission of safety-relevant messages among participants within a distributed network which use fieldbus technology in accordance with the requirements of IEC 61508 (all parts) for functional safety. These principles are based on the black channel approach. They can be used in various industrial applications such as process control, manufacturing automation and machinery.