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    <pre style="white-space:pre-line"><code>3                                     Unleashing the potential of the Internet of Things

                    2)  The  gateway  is  recommended  to  support  uniform  interaction  through  standardized
                        protocols with different applications.

            8.3     Support capabilities related requirements and recommendations
            â€“       Device and service discovery
                    When devices  are  connected to  a  gateway, the  gateway discovers them.  In addition, the
                    gateway discovers new services which are published by applications.
                    The device and service discovery requirements of the gateway are as follows:

                    1)  The gateway is required to support mechanisms for device discovery when a device
                        connects to the gateway for the first time or in the case of gateway restart.

                    2)  The  gateway  is  required  to  support  mechanisms  for  service  discovery  when  new
                        services are published by applications.

            â€“       Device management
                    There are a great number of devices that are connected to a gateway and most of them have
                    capability  constraints.  The  gateway  manages  devices  based  on  policies  or  instructions
                    received from applications.
                    The device management requirements of the gateway are as follows:

                    1)  The  gateway  is  required  to  support  management  of  device  related  information,  e.g.,
                        device identification, device configuration, etc.

                    2)  The  gateway  is  required  to  support  monitoring  of  device  status  for  usage  by
                        applications or itself.

                    3)  The gateway is required to support firmware and software update of devices.
                    4)  The gateway is required to support device management on behalf of applications upon
                        request.

                    5)  The  gateway  is  recommended  to  support  fault  management  of  devices  based  on
                        policies.

                    6)  The gateway is recommended to support performance management of devices based on
                        policies.

            â€“       Device identifier management
                    Multiple  types  of  device  identifiers  may  be  used  in  IoT  applications,  e.g.,  IP  address,
                    MSISDN, URI, data elements, etc. A device may have single or multiple identifiers which
                    are managed by the gateway.

                    The device identifier requirements of the gateway are as follows:
                    1)  The  gateway  is  required  to  support  identifier  mapping  capability  between  different
                        types of device identifiers.

                    2)  The  gateway  is  recommended  to  support  identifier  combination  capability,  e.g.,  the
                        combination of device identifier with gateway identifier.

                    NOTE â€“ The combined identifiers may be provided to applications as globally unique identifiers,
                    while the gateway resolves the combined identifiers in order to address the different devices.
                    3)  The gateway is recommended to support the assignment of temporary communication
                        identifiers to the devices connected to the gateway itself.












            104      Rec. ITU-T Y.4101/Y.2067 (06/2014)</code></pre>
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