Page 329 - 2015 Security in Telecommunications and Information Technology

Unleashing the potential of the Internet of Things 3

NOTE – The EHM devices are different from ordinary customer electronic devices. In EHM services, the
EHM devices collect physical signals directly and/or indirectly from the human body. The EHM devices
have high demands for security, safety and reliability.

9.5.2 Gateway
According to service requirement 8.3(1), the device layer is required to provide gateway capabilities
for EHM devices and EHM applications. A gateway can serve multiple EHM end points and
it provides gateway capabilities by acting on behalf of the EHM end points (e.g., the gateway can
provide data processing when the connected EHM end points cannot process the raw data by
themselves).

9.5.3 Data sensing and processing
According to service requirement 8.6.1(5), the device layer is required to support the data sensing
and processing capability for obtaining EHM data.

The data sensing and processing capability required to be supported in the device layer includes:
1) Data sensing
Data sensing is used to obtain the raw EHM data and is required to respect corresponding
regulations and laws. It is recommended to support the sensing of multiple EHM
parameters in a single EHM device.
2) Data processing

Data processing is used to process raw EHM data, such as filtering, aggregating,
computing, etc., in order to obtain the desired EHM data.
NOTE – EHM devices can utilize this capability to derive the desired EHM data according to different
policies, including at fixed time intervals, upon application request and so on.
9.5.4 Data collection time provision

According to service requirements 8.2.3(4), 8.3(7), the data collection time provision capability is
recommended to be supported in the device layer, so that the collected EHM data can be marked
with the collection time.

The collection time of EHM data is recommended to be known with precision by the EHM
application server. It is required to mark the EHM data with the collection time in EHM devices or
gateways instead of the EHM application server, since the network transmission time and dispose
time affect the precision of the collection time.
The data collection time provision capability recommended to be supported in the device layer
includes:
1) Time calibration
The time calibration capability is used to obtain the time parameters from the SSAS layer
and calibrate the built-in time clock of EHM devices.
2) Time provision
The time provision capability is used to provide the calibrated collection time along with
the collected EHM data for time stamping.
9.5.5 Device based locating

According to service requirements 8.2.1(5), 8.2.2(5), 8.2.3(5), 8.6.2(5), the locating capability is
recommended to be supported in the device layer to get the position of EHM devices.
The EHM devices or gateways can utilize different techniques (e.g., GPS, gyroscope and motion
state sensor) to implement the locating capability.

Rec. ITU-T Y.4110/Y.2065 (03/2014) 315