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Unleashing the potential of the Internet of Things 5

Table 2 – EHM components and accounting-related information
provision capability of the application layer

EHM Accounting-related information provision
components
EHM end point The application layer of the EHM end point is recommended to report accounting-
related information, including, but not limited to, service class (i.e., EHMH or EHMR
or EHMT), number of times and duration time of EHM service usage.
EHM terminal The application layer of the EHM terminal is recommended for the reporting of
accounting-related information to the service support and application support (SSAS)
layer of the EHM terminal. This information includes, but is not limited to, service class
(i.e., EHMH or EHMR or EHMT), number of times and duration time of EHM service
usage.
EHM gateway The application layer of the EHM gateway is recommended to report accounting-related
information about the connected EHM end points to the SSAS layer of the EHM
gateway. This information includes, but is not limited to, service type (EHMH, EHMR
and EHMT), number of duration times and duration time of application usage.
IoT platform None.

EHM application The application layer of the EHM application server is recommended to report
server accounting-related information to the SSAS layer of the EHM application server. This
information includes, but is not limited to, number of times and duration time of EHM
service usage.

8.2.3 QoS related information provision

According to the capability requirements described in clause 9.2.3 of [ITU-T Y.2065], the application
layer of the EHM end point, EHM terminal, EHM gateway and EHM application server is
recommended to provide Quality of Service (QoS) information to the SSAS layer or network layer
for QoS configuration purposes.
NOTE – Refer to clause 9.2.3 of [ITU-T Y.2065] for the recommended QoS parameters.

8.3 SSAS layer capabilities of EHM components

8.3.1 Message conversion
According to the capability requirements described in clause 9.3.2 of [ITU-T Y.2065], the SSAS layer
of the EHM terminal, EHM gateway, IoT platform and EHM application server is required to provide
message conversion capability at the syntactic or semantic level.
NOTE – "Message" is intended here as the carrier of information transmitted between EHM technical
components.

8.3.2 Data storage

According to the capability requirements described in clause 9.3.3 of [ITU-T Y.2065], the SSAS layer
of the EHM terminal, EHM gateway, IoT platform and EHM application server is required to provide
data storage.
The data stored in the SSAS layer are recommended to be stored in standard format so that the
information can be easily exchanged among different EHM application servers, gateways and EHM
terminals.
The specific requirements for data storage capability of the SSAS layer for each EHM component are
described in Table 3.

Rec. ITU-T Y.4408/Y.2075 (09/2015) 669