Page 211 - ITU-T Focus Group IMT-2020 Deliverables

ITU-T Focus Group IMT-2020 Deliverables 3

Server Sink
Internet
Node

User
Sensor Nodes

Figure 6 – A traditional sensor network service for revealing networking features

This service shows the following networking features.
• There are a large number of network elements and their types can be varied.
• The network hopping can be very lengthy.
• Network elements (sensor nodes) can be discarded once its battery consumed out.

• The capability of sensor node is weak, so it relies on the sink node to communicate with outside.
Figure 7 shows a simplified version of convenience type IoT service, where the IoT devices can help the human
life by monitoring everyday life environments and actuating proper management and control actions.

Figure 7 – A simplified version of convenience type IoT service
for revealing networking features

This service shows the following networking features.

• The number of network elements is smaller than the sensor network system, but still larger than
the legacy IT systems and their types are varied.
• Some types of devices can connect to the Internet gateway directly, but most sensors pass through
the sensor controller to reach to the users and servers.
• Sensor controller is to be equipped with enough computing and communicating capability.

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