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3                                     Unleashing the potential of the Internet of Things



































                                    Figure 1 – Reference service architecture model


            7       Service requirements of tag-based identification applications and services

            The  following  are  high-level  service  requirements  for  tag-based  identification  applications  and
            services.  These  requirements  identify  the  required  extensions  to  the  set  of  NGN  release  1
            capabilities. Requirements in Appendix I do not impact NGN capabilities and they are provided for
            informative purposes in order to develop tag-based identification applications and services over the
            NGN environment.

            7.1     Multi-identifier interpretation requirements

            An identifier constituted by sub-identifier elements is required to be interpreted into sub-identifiers
            by its structure information. An ID terminal is required to contain the structure information of the
            supported identifiers.

            Tag-based  identification  applications  and  services  have  the  following  requirement  to  support
            multi-identifier interpretation:

            •       identifier structure information may be provided to an ID terminal.

            7.2     Identifier resolution
            Tag-based  identification  applications  and  services  have  the  following  identifier  resolution
            requirements:
            1)      it is recommended to provide forward identifier resolution from an identifier to associated
                    information;
            2)      support of a reverse identifier resolution from  associated information to a corresponding
                    identifier may be provided (see Note 1);
                    NOTE  1  –  The  reverse  identifier  resolution  provides  a  means  to  find  a  specific  identifier  of  an
                    object and its location in the physical world, from the associated information of the object. This is
                    like searching for a book and its location in a library by using the library catalogue.
            3)      it is recommended to support one-to-one association between an identifier and associated
                    information;


            234      Rec. ITU-T Y.4108/Y.2213 (09/2008)
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