ISO/IEC INTERNATIONAL STANDARD 21228 First edition 2019-05 Information technology Telecommunications and information exchangebetweensystems Coexistencemechanismfor broadband powerline communication technologies TechnologiesdeI'informationTelecommunications etéchange d'informationentresystemes-Mecanismedecoexistencedes technologiesdecommunicationlargebandesurligneelectrique Referencenumber IS0/IEC21228:2019(E) IEC @IS0/IEC2019 IS0/IEC21228:2019(E) COPYRIGHTPROTECTEDDOCUMENT IS0/IEC2019 All rights reserved.Unless otherwise specified,or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in anyform orby any means, electronic or mechanical, including photocopying, or posting ontheinternetoranintranet,withoutpriorwrittenpermission.Permissioncanberequestedfromeitherisoattheaddress beloworIso'smemberbodyinthecountryoftherequester. ISOcopyrightoffice CP401.Ch.deBlandonnet8 CH-1214Vernier,Geneva Phone:+41227490111 Fax:+41227490947 Email:copyright@iso.org Website:www.iso.org Published in Switzerland ii @IS0/IEC2019-All rights reserved IS0/IEC21228:2019(E) Contents Page Foreword ..iv Introduction .V 1 Scope 1 2 Normativereferences 1 3 Terms and definitions 1 4 Abbreviation 1 5 Coexistenceprotocol 1 5.1 General 5.2 Extended TDM resource allocationutilizingresourcefor an absent in-home system 2 5.3 ExtendedTDMresourceallocationutilizingresourceforaccesssystem 3 Bibliography 6 IS0/IEc2019-All rightsreserved iii