Page 210 - ITU-T Focus Group IMT-2020 Deliverables

3 ITU-T Focus Group IMT-2020 Deliverables

Capturing live event on the field and sending it to the watchers may require network slice technology in IMT-
2020 environment. Typically, under 10ms latency and over 1Gbps bandwidth requirements are underline
features of the IMT-2020 network to support this kind of eMBB services.
Due to the multicasting characteristics of the broadcasting service, the domain-wise slicing might be more
reasonable than the end-to-end slicing passing through the whole domains. Creating slices for each one-to-
one connections between each producer-consumer combinations may not be feasible in broadcasting
service.

At least two slices will be stitched together to serve a channel, which include the first slice between the
producer and the streaming server, and the second between the streaming server and the consumer.

Based on these insights (but not limited to), following requirements can be suggested for the IMT-2020
network management:

• In this service, the network management functions should monitor and manage the network
equipment, especially the ones installed before and after the stitching point, in this case the stream
server.
– The stitching point can be the spot where the virtual and physical equipment met, and the
network management functions should be able to be dealing with the subtlety of this point.
• Since the slices can be created and deleted flexibly, the network management functions should be
characterized with proper agility accordingly.
• Since various encoding protocols can be used depending on UE’s contents players, the streaming bit
rates will be diverse. In this case, the bit rates for the streams should be managed and controlled
under the total bandwidth allocated on that slice. This situation addresses the need of priority
management for the slices and for the streams in a single slice.
• One other issue is that a single UE can connect to multiple channels. When a networking problem
occurs on a specific channel, the operating staff should be able to describe and resolve the problem
with the help of network management system. That means the network management functions
should be able to handle each slices separately, so that it can recover each slice without rebooting
the physical resources beneath them.
7.3.3 IoT service management requirement for IMT-2020

IMT-2020 network management requirements are discussed based on the traditional sensor networking and
Home-IoT service which are relatively feasible in mMTC service category. After spending a long struggling
period, the IoT services started to be deployed in the real market recently. The IMT-2020 the network
management architecture should consider the IoT network features, such as, the big number of devices, the
configuration flexibility due to the battery-operated devices, delegated management scheme via the sensor
controller, and so forth.

IoT services can be grouped into 2 categories – 1) A public IoT service type, started from the beginning of IoT
technology, in which numerous IoT devices are spread over the specific area human cannot access easily, to
monitor the area and collect the information. 2) A convenience service type, where IoT devices are installed
at home, office, or factory to provide convenience to human.
Networking features appeared in those two service categories are investigated and derive several
requirements for IMT-2020 network management.
Figure 6 shows a traditional sensor network deployment, where a large number of sensor node monitor the
specific area.

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