Page 219 - Big data - Concept and application for telecommunications

Big data - Concept and application for telecommunications 5

7.4.1 Data transfer

In addition to the general network requirements of the IoT, three main challenges, as described in clause 6.3,
for a network handling data with ''IoT big data characteristics'' are identified:
– Access of a large number of devices to the network;
– Transfer of data in the network with different SLA and QoS requirements;
– Transfer in the network of high volumes of IoT data.
The access of a large number of devices to the network may cause network congestion. Network
requirements related to congestion issues caused by massive device access (e.g., in application scenarios
using a large number of smart meters and sensors) are identified in [ITU-T Y.4113].
Concerning SLA and QoS, according to the specific service requirements, the network is required to adopt
appropriated network technologies in order to support diverse services (e.g., time-critical services and non-
time-critical services).
NOTE – Examples of network technologies include IoT dedicated cellular technologies and IoT dedicated non-
cellular technologies.

In the IoT, in particular for data migration and data backup purposes, the volume of IoT data transferred
among different IoT platforms and among IoT platforms and IoT application servers may be huge. The
network is recommended to provide appropriate bandwidth according to requirements of IoT platforms and
IoT application servers in order to support the huge volume of these data flows. Figure 4 describes typically
relevant IoT data flows among different IoT components. The thickness of the lines in Figure 4 symbolizes the
relative volume of exchanged data.

Figure 4 – Typically relevant data flows among different IoT components

7.5 Requirements of the IoT platform for big data
7.5.1 Data collection

The IoT platform is required to have the ability to efficiently collect the IoT data received from a gateway or
devices. For example, data collection schedulers can be used in the IoT platform to arrange the collection
period and collection sequence according to application or network requirements in order to relieve the
network and the IoT platform load when dealing with a large amount of IoT data.
7.5.2 Data pre-processing

The IoT platform is required to have the ability to pre-process the collected IoT data in order to verify and
improve the accuracy of the IoT data, e.g., de-noising operation.

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