BS ISO/IEC 18000-61:2012

Information technology. Radio frequency identification for item management. Parameters for air interface communications at 860 MHz to 960 MHz Type A | Status: Confirmed, Current

1 Scope ThispartofISO/IEC 18000definestheairinterfaceforradiofrequencyidentification (RFID) devicesoperatinginthe860 MHzto960 MHzIndustrial, Scientific, andMedical (ISM) bandusedinitemmanagementapplications. ItprovidesacommontechnicalspecificationforRFIDdevicesthatcanbeusedbyISOcommitteesdevelopingRFIDapplicationstandards. ThispartofISO/IEC 18000isintendedtoallowforcompatibilityandtoencourageinter-operabilityofproductsforthegrowingRFIDmarketintheinternationalmarketplace. Itdefinestheforwardandreturnlinkparametersfortechnicalattributesincluding, butnotlimitedto, operatingfrequency, operatingchannelaccuracy, occupiedchannelbandwidth, maximumeffectiveisotropicradiatedpower (EIRP), spuriousemissions, modulation, dutycycle, datacoding, bitrate, bitrateaccuracy, bittransmissionorder, and, whereappropriate, operatingchannels, frequencyhoprate, hopsequence, spreadingsequence, andchiprate. Itfurtherdefinesthecommunicationsprotocolusedintheairinterface. ThispartofISO/IEC 18000specifiesthephysicalandlogicalrequirementsforapassive-backscatter, Interrogator-Talks-First (ITF) systems. ThesystemcomprisesInterrogators, alsoknownasreaders, andtags, alsoknownaslabels. AnInterrogatorreceivesinformationfromatagbytransmittingacontinuous-wave (CW) RFsignaltothetag; thetagrespondsbymodulatingthereflectioncoefficientofitsantenna, therebybackscatteringaninformationsignaltotheInterrogator. ThesystemisITF, meaningthatatagmodulatesitsantennareflectioncoefficientwithaninformationsignalonlyafterbeingdirectedtodosobyanInterrogator. Indetail, thispartofISO/IEC 18000containsType A. Type AisITF. Type AusesPulse-IntervalEncoding (PIE) intheforwardlinkandanadaptiveALOHAcollision-arbitrationalgorithm. ThispartofISO/IEC 18000specifies

• — physicalinteractions (thesignallinglayerofthecommunicationlink) betweenInterrogatorsandtags,
• — Interrogatorandtagoperatingproceduresandcommands,
• — thecollision arbitrationschemeusedtoidentifyaspecifictaginamultiple-tagenvironment.