Page 326 - 2015 Security in Telecommunications and Information Technology

3 Unleashing the potential of the Internet of Things

9.2.3 QoS information provision

According to service requirements 8.4.2(2), 8.4.1(1), 8.2.3(2), the QoS information for EHM
services is required to be configured by the application layer and provided to the other layers, so
that the other layers can ensure the QoS of EHM services according to the QoS information
provided by the application layer.
The following QoS related parameters are recommended to be indicated in the provided QoS
information:
1) Required response time
As different types of EHM services need to be dealt with in different time periods, response
time is an important criterion in reckoning the requirements of an EHM service.
2) Allowed dispose time

Dispose time is the time period from the moment when data arrive at the server to the
moment when doctors or application providers execute an appropriate reaction. Generally
speaking, dispose time includes the time to analyse data, the time to store data in the
storage area, the time to send an alarm to doctors when unusual results are deduced, and so
on. Dispose time as part of the response time is very important in reckoning the EHM
application capabilities.
3) Instantaneity level

Instantaneity level indicates the level of priority of the EHM application when the EHM
application related data are transmitted, processed and queued.

4) Minimum transmission rate
In some EHM scenarios (i.e., in an emergency car or disaster rescue), the voice, video or
dynamic monitoring data need be transmitted to the remote server for diagnosis and
treatment in real time. To ensure real-time data transmission, a minimum transmission rate
is required to be indicated.
5) Maximum transmission time
Maximum transmission time as part of the response time is used to limit the transmission
time. For some non-real time EHM applications (i.e., routine physical examination),
although there is no minimum transmission rate requirement, there is an allowed maximum
transmission time restriction.

9.3 Capabilities of the SSAS layer

9.3.1 Service accounting and charging
Service accounting is responsible for gathering data about the usage of EHM services and for
charging the service usage to the user. Different policies may be considered for service accounting
and charging, e.g., the number of times the service is used, the amount of time the service is used or
the volume of service data used. According to service requirements 8.6.2(2), 8.2.1(4), 8.2.2(4),
the service accounting and charging capability supported in the SSAS layer has the following
requirements:
1) It is required to provide service accounting and charging to EHM service users.
2) It is recommended to provide service accounting and charging according to the quality of
service of EHM services.
3) It is recommended to provide service accounting and charging also in support to roaming
scenarios among networks owned by different network providers.
4) It is recommended to provide service accounting and charging according to the frequency
of access to EHM services.

312 Rec. ITU-T Y.4110/Y.2065 (03/2014)