1、INTERNATIONALSTANDARDIEC62056-42First edition2002-02Electricity metering Data exchange for meter reading,tariff and load control Part 42:Physical layer services and proceduresfor connection-oriented asynchronousdata exchangeReference numberIEC 62056-42:2002(E)LICENSED TO MECON Limited.-RANCHI/BANGAL
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9、ical layer services and proceduresfor connection-oriented asynchronousdata exchangePRICE CODE IEC 2002 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in
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11、 TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 62056-42 IEC:2002(E)CONTENTSFOREWORD.41Scope.52Normative references.53Terms,definitions and abbreviations.64Overview.75Service specification.85.1List of services.85.1.1Connection establishment/
12、release related services.85.1.2Data communication services.85.1.3Layer management services.85.2Use of the physical layer services.95.3Service definitions.95.3.1PH-CONNECT.request.95.3.2PH-CONNECT.indication.105.3.3PH-CONNECT.confirm.105.3.4PH-ABORT.request.115.3.5PH-ABORT.confirm.115.3.6PH-ABORT.ind
13、ication.115.3.7PH-DATA.request.125.3.8PH-DATA.indication.126Protocol specification.136.1Physical layer protocol data unit.136.2Transmission order and characteristics.136.3Physical layer operation description of the procedures.136.3.1General.136.3.2Setting up a physical connection.146.3.3The identifi
14、cation service.156.3.4Data communications.196.3.5Disconnection of an existing physical connection.19Annex A(informative)An example:PH service primitives and Hayes commands.20Annex B(informative)Data model and protocol.25Bibliography.26Figure 1 Typical PSTN configuration.7Figure 2 The location of the
15、 physical layer.8Figure 3 Protocol layer services of the COSEM 3-layer connection oriented profile.9Figure 4 MSC for physical connection establishment.15Figure 5 MSC for IDENTIFY.request/.response message exchange.17Figure 6 Handling the identification service at the COSEM server side.17Figure 7 Par
16、tial state machine for the client side physical layer.18Figure A.1 MSC for physical connection request.20Figure A.2 Physical connection establishment at the CALLING station.21Figure A.3 MSC for physical connection establishment.22Figure A.4 Data exchange between the calling and called stations.23Figure A.5 MSC for a physical disconnection.24Figure B.1 The three-step approach of COSEM.25LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREA