Page 22 - ITU-T Focus Group IMT-2020 Deliverables

2 ITU-T Focus Group IMT-2020 Deliverables

UE User Equipment

UHD Ultra-High Definition
USIM Universal Subscriber Identity Module

V2X Vehicle-to-Everything
VoLTE Voice over LTE

WLAN Wireless LAN

5 Conventions

In this Recommendation:
The keywords "is required to" indicate a requirement which must be strictly followed and from which no
deviation is permitted, if conformance to this Recommendation is to be claimed.
The keywords "is recommended" indicate a requirement which is recommended but which is not absolutely
required. Thus, this requirement need not be present to claim conformance.
The keywords "can optionally" indicate an optional requirement which is permissible, without implying any
sense of being recommended. This term is not intended to imply that the vendor's implementation must
provide the option, and the feature can be optionally enabled by the network operator/service provider.
Rather, it means the vendor may optionally provide the feature and still claim conformance with this
Recommendation.

6 Overview of IMT-2020 from network perspective

According to ITU-R Recommendation M.2083-0, IMT-2020 is described as systems, system components, and
related aspects that provide far more enhanced capabilities than those described in Recommendation
ITU-R M.1645. IMT-2020 systems will differentiate themselves from fourth generation (4G) systems not only
through further evolution in radio performance but also through greatly increased end-to-end flexibility. This
end-to-end flexibility will come in large part from the incorporation of softwarization into every component.
Well known techniques such as SDN, NFV and cloud computing will together allow unprecedented flexibility
in the IMT-2020 system. Such flexibility will enable many new capabilities including network slicing. IMT-2020
is not just an increase in bandwidth from the previous releases of IMT system, but rather a fundamental
change to support the following capabilities:
– To support IMT-2020 RATs, evolved IMT-2020 RATs, WLAN, fixed broadband network, satellite, and
future radio access networks in access agnostic ways as a single network
– To cope with traffic explosion
– To easily incorporate future emerging services and extend them anywhere in the world
– To provide cost-efficient infrastructure

– To expand the geographic reach of IMT-2020 network
The use cases expected in IMT-2020 are categorized into three representative services: enhanced mobile
broadband service, ultra-reliable and low-latency communications, and massive machine type
communications. The other services are placed in-between those three service characteristics.

Enhanced mobile broadband services are to allow users to experience high-speed and high-quality
multimedia services, e.g., virtual reality, augmented reality, 4K/8K Ultra-High Definition video, and even
hologram services, at any time and any place. Ultra-reliable and low-latency communications are to enable
delay sensitive and mission critical services such as tactile Internet which requires less than a millisecond
end-to-end delay, remote control of medical and industrial robots, and vehicle-to-everything (V2X)
communications. The massive machine type communications is to support connections and communications
among massive amounts of Internet of Things (IoT) devices.

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