BS ISO IEC 24769-2-2013 Information technology Real-time locating systems (RTLS) device conformance test methods Test methods for air interface communication at 2 4 GHz《信息.pdf

1、BSI Standards Publication BS ISO/IEC 24769-2:2013 Information technology Real-time locating systems (RTLS) device conformance test methods Part 2: Test methods for air interface communication at 2,4 GHzBS ISO/IEC 24769-2:2013 BRITISH STANDARD National foreword This British Standard is the UK impleme

2、ntation of ISO/IEC 24769-2:2013. The UK participation in its preparation was entrusted to Technical Committee IST/34, Automatic identification and data capture techniques. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not pur

3、port to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013 ISBN 978 0 580 77539 0 ICS 35.040 Compliance with a British Standard cannot confer immunity from legal obliga

4、tions. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2013. Amendments issued since publication Date Text affectedBS ISO/IEC 24769-2:2013 Information technology Real- time locating systems (RTLS) device conformance test methods Part

5、2: Test methods for air interface communication at 2,4 GHz Technologies de linformation Mthodes dessai de conformit du dispositif des systmes de localisation en temps rel (RTLS) Partie 2: Mthodes dessai pour la communication dinterface dair 2,4 GHz ISO/IEC 2013 INTERNATIONAL STANDARD ISO/IEC 24769-2

6、 First edition 2013-06-15 Reference number ISO/IEC 24769-2:2013(E)BS ISO/IEC 24769-2:2013ISO/IEC 24769-2:2013(E)ii ISO/IEC 2013 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized oth

7、erwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright offic

8、e Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in SwitzerlandBS ISO/IEC 24769-2:2013ISO/IEC 24769-2:2013(E) ISO/IEC 2013 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative refere

9、nces 1 3 T erms, definitions and abbr e viat ed t erms 1 3.1 Terms and definitions . 1 3.2 Abbreviated terms . 2 4 Conformance tests for ISO/IEC 24730-2 2 4.1 General . 2 4.2 Default conditions applicable to the test methods 2 4.3 Tag DSSS RF transmission tests 3 4.4 Receiver DSSS RF tests . 5 4.5 T

10、ests for optional air interfaces 7 Annex A (informative) RF Test measurement site .14 Annex B (normative) Message formats for tests .15 Annex C (normative) Technical requirements of measurement antenna andvector signal analyser .17 Annex D (normative) T echnical r equir ements of the ar bitr ary w a

11、 v eform gener at or and magnetic coil 18 Annex E (informative) C onfigur ation file for the Agilent E4438C .19 Annex F (normative) High SNR demodulation of ISO/IEC 24730-2 DSSS BPSK signals 27 Annex G (normative) High SNR demodulation of ISO/IEC 24730-2 OOK signals 28BS ISO/IEC 24769-2:2013ISO/IEC

12、24769-2:2013(E) Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standard

13、s through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC

14、, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is t

15、o prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibi

16、lity that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 24769-2 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 31, Automatic

17、 identification and data capture techniques. This first edition of ISO/IEC 24769-2, together with other parts of ISO/IEC 24769, cancels and replaces ISO/IEC TR 24769:2008, which has been technically revised. ISO/IEC 24769 consists of the following parts, under the general title Information technolog

18、y Real- time locating systems (RTLS) device conformance test methods: Part 2: Test methods for air interface communication at 2,4 GHz Part 5: Test methods for chirp spread spectrum (CSS) at 2,4 GHz air interface The following parts are under preparation: Part 61: Low rate pulse repetition frequency

19、Ultra Wide Band (UWB) air interface Part 62: High rate pulse repetition frequency Ultra Wide Band (UWB) air interfaceiv ISO/IEC 2013 All rights reservedBS ISO/IEC 24769-2:2013ISO/IEC 24769-2:2013(E) Introduction ISO/IEC 24730 defines the air interfaces and an application programming interface for Re

20、al Time Locating Systems (RTLS) devices used in asset management applications. This International Standard contains all measurements required to be made on a product in order to establish whether it conforms to ISO/IEC 24730-2. Test methods for measuring performance of equipment compliant with ISO/I

21、EC 24730-2 are given in ISO/IEC 24770. ISO/IEC 2013 All rights reserved vBS ISO/IEC 24769-2:2013BS ISO/IEC 24769-2:2013Information technology Real-time locating systems (RTLS) device conformance test methods Part 2: Test methods for air interface communication at 2,4 GHz 1 Scope This International S

22、tandard defines the test methods for determining the conformance of 2,4 GHz real-time locating system (RTLS) tags with the specifications given in the corresponding subclauses of ISO/IEC 24730-2, but does not apply to the testing of conformity with regulatory or similar requirements. The test method

23、s require only that the mandatory functions, and any optional functions which are implemented, be verified. This may in appropriate circumstances be supplemented by further, application-specific functionality criteria that are not available to the general case. The RTLS tag conformance parameters in

24、cluded in this International Standard include the mandatory direct sequence spread spectrum (DSSS) 2,4 GHz radio frequency beacon. It also includes the optional on-off keyed, frequency shift keyed (OOK/FSK) short-range radio frequency link and the optional magnetic air interface. Unless otherwise sp

25、ecified, the tests in this International Standard apply exclusively to RTLS tags defined in ISO/IEC 24730-2. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edit

26、ion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC 19762-1, Information technology Automatic identification and data capture (AIDC) techniques Harmonized vocabulary Part 1: General terms relating to AIDC ISO/IEC 19762-

27、3, Information technology Automatic identification and data capture (AIDC) techniques Harmonized vocabulary Part 3: Radio frequency identification (RFID) ISO/IEC 24730-2, Information technology Real time locating systems (RTLS) Part 2: Direct Sequence Spread Spectrum (DSSS) 2,4 GHz air interface pro

28、tocol 3 T erms, d efinitions and abbr e viat ed t erms For the purposes of this document, the terms and definitions given in ISO/IEC 19762-1, ISO/IEC 19762-3 and the following apply. 3.1 T erms and definiti ons 3.1.1 error vector magnitude EVM difference between the measured signal and a reference N

29、ote 1 to entry: A reference is a perfectly modulated signal. INTERNATIONAL ST ANDARD ISO/IEC 24769-2:2013(E) ISO/IEC 2013 All rights reserved 1BS ISO/IEC 24769-2:2013ISO/IEC 24769-2:2013(E) 3.2 A bbr e viat ed t erms ARB arbitrary waveform generator BPSK binary phase shift keying DSSS direct sequenc

30、e spread spectrum DUT device under test EIRP effective isotropic radiated power EVM error vector magnitude FSK frequency shift keying OOK on-off keying PPM parts per million RBW resolution bandwidth RTLS real-time locating system TIB timed interval blink VBW video bandwidth 4 Conformance tests for I

31、SO/IEC 24730-2 The following subclauses describe the conformance tests. 4.1 General This International Standard specifies a series of tests to determine the conformance of RTLS tags to the ISO/IEC 24730-2 air interfaces. The results of this test shall be compared with the values of the parameters sp

32、ecified in ISO/IEC 24730-2 to determine whether the tag under test conforms. This International Standard also specifies a series of tests to determine the conformance of RTLS RF receivers to the ISO/IEC 24730-2 air interfaces. The results of these tests shall be compared with the values of the param

33、eters specified in ISO/IEC 24730-2 to determine whether the RF receiver under test conforms. This International Standard additionally specifies tests to determine the conformance of the magnetic exciter device that is specified as an optional air interface for ISO/IEC 24730-2. 4.2 Default c ondition

34、s applicable t o the t est methods These conditions apply to all tests. 4.2.1 Test environment Unless otherwise specified, testing shall take place in an environment of temperature 23 C 3 C (73 F 5 F) and of relative humidity 25 % to 75 %. 4.2.2 Default tolerance Unless otherwise specified, a defaul

35、t tolerance of + 5 % shall be applied to the quantity values given to specify the characteristics of the test equipment and the test method procedures.2 ISO/IEC 2013 All rights reservedBS ISO/IEC 24769-2:2013ISO/IEC 24769-2:2013(E) 4.2.3 Noise floor at t est location Noise floor at test location sha

36、ll be measured with the spectrum analyser in the same conditions as the measurement of the DUT, with a span of 10 MHz: RBW, VBW and antenna. The spectrum analyser shall be configured in acquisition mode for at least 1 minute. The maximum of the measured amplitude shall be at least 60 dB below the ex

37、pected value of the amplitude of the measured tag DSSS transmission at 0 dBm power with the tag placed at 1 m from the measurement antenna. Special attention has to be given to spurious emissions, e.g. insufficiently shielded computer monitors. The electromagnetic test conditions of the measurements

38、 shall be checked by performing the measurements with and without a tag in the field. 4.2.4 Total measurement uncertainty The test equipment will introduce a level of measurement uncertainty. For example, the frequency accuracy of the local oscillator used in RF down-converter will add uncertainty t

39、o the calculated frequency accuracy of the measured RF. The specifications of the test equipment used shall be included in the report. 4.3 Tag DSSS RF transmission tests This portion of the document describes the tests of the DSSS transmissions. 4.3.1 General The DUT shall be an RTLS tag. The measur

40、ement equipment shall consist of an anechoic chamber as described in Annex A, and a measuring antenna and a vector signal analyser for example an Agilent E4443A 1)with 80 MHz bandwidth, as described in Annex C. Figure 1 shows the required test equipment setup. DUT 1 meter Vector Signal analyzer Meas

41、urement Antenna Figure 1 Setup of equipment for DSSS RF test 4.3.2 T est Objecti v e The objective of this test is to verify that the RTLS tag provides the appropriate DSSS modulation waveform required for proper system performance. 1) The Agilent E4443A is an example of a suitable product available

42、 commercially. This information is given for the convenience of users of this document and does not constitute and endorsement by ISO or IEC of this product. ISO/IEC 2013 All rights reserved 3BS ISO/IEC 24769-2:2013ISO/IEC 24769-2:2013(E) 4.3.3 Test procedure The tag shall be configured to transmit

43、a 152-bit DSSS blink (as defined in 6.3.2.4 of ISO/IEC 24730-2) at an interval of 10 seconds or less. Each blink shall be configured with at least 2 sub-blinks. The tag shall be configured to transmit at a class 1 power between 0 dBm and +10 dBm EIRP. The measurement equipment shall be configured to

44、 start capturing for not less than 2,5 milliseconds after the RF energy detected is above the threshold. The post processing software shall calculate the raw samples and produce metrics for the following parameters to verify compliance of the tag. 4.3.4 Test measurements and requirements This subcla

45、use describes the test measurements and requirements. 4.3.4.1 Carrier frequency The carrier frequency shall be 2 441,750 MHz 61 kHz (25 PPM). The carrier frequency drift over the duration of the entire message shall be less than 5 kHz (2 PPM). 4.3.4.2 Transmit power The transmitted power shall be ca

46、lculated based on the power received at the measurement antenna. The calculated power shall be within 2,0 dB of the DUT specified transmit power. 4.3.4.3 Chip rate The chip rate of the BPSK shall be 30,521 875 MHz 763 Hz (25 PPM). No phase transitions shall occur at less than the chip rate, and all

47、phase transitions shall occur at an integral multiple of the chip rate. An example methodology for measuring these transitions is provided in Annex F. 4.3.4.4 Message content and structure The post processing software shall verify the 152-bit message format including preamble, status bits, tag ID, d

48、ata, and message CRC are in compliance with the format specified in ISO/IEC 24730-2, 6.3.2.1. The post processing software shall verify differential data encoding within the message. 4.3.4.5 PN code length and polynomial The polynomial used for driving the BPSK DSSS modulation is defined in Figure 3

49、 of 6.1 of ISO/IEC 24730- 2. The entire captured message shall be 511 * 152 = 77 672 chips in length. The post processing software shall verify compliance with the defined PN sequence polynomial and second order nonlinearity equation specified in ISO/IEC 24730-2. 4.3.4.6 Error vector magnitude A BPSK signal shall produce a phase/amplitude constellation of two points. The post processing software shall determine the error vector magnitude of the distribution of the captured signal. The EVM mus