Page 23 - ITU-T Focus Group IMT-2020 Deliverables

ITU-T Focus Group IMT-2020 Deliverables 2

7 Design goals

Future networks are recommended to fulfil the following objectives [ITU-T Y.3001]:
• Service awareness
• Data awareness
• Environmental awareness
• Social and economic awareness

And in order to realize these objectives, IMT-2020 networks should take into account following design goals
as key principles to design IMT-2020 networks.

7.1 Service diversity
The IMT-2020 network should support diversified services accommodating a wide variety of traffic
characteristics and behaviours, to support a huge number and wide variety of communication objects, such
as user devices, peripheral devices, sensors, and IoT/M2M devices.
7.1.1 Diversity of QoS requirements

The IMT-2020 network should support services that have different end-to-end QoS (data rate, reliability,
latency, location accuracy etc.) requirements. There may be some latency critical applications while there
are others which are tolerant long end-to-end latency.

7.1.2 Diversity of UE mobility and service continuity
IMT-2020 should support a wide range of mobility and service continuity options. It is expected that mobility
requirements for user devices will vary depending on the device and/or application types. Therefore,
IMT-2020 should not assume the same mobility support for all devices and application services but rather
provide mobility on demand only to those that need it.

The IMT-2020 network should provide mobility that facilitates high-speed and large-scale networks in an
environment where a huge number of UE can dynamically move across heterogeneous networks.

7.1.3 Diversity of user data type
IMT-2020 should support the transmission of IP data and non-IP data. In addition, IMT-2020 should support
frequent big data and infrequent small data delivery.

7.2 Functional flexibility and programmability

The IMT-2020 network should be flexible, resilient and extensible to cope with various and sometimes even
conflicting service requirements adaptably instead of installing a dedicated network for each emerging new
service. Thus, the network architecture should support programmable function/service/application
allocation and configuration, and dynamic scale-in/-out, etc.
IMT-2020 network architecture should be designed to have a common core which supports on-demand
composition of variety of multiple network slices (e.g., converged fixed/mobile network optimized for a
particular service).
IMT-2020 network should support virtualization of resources associated with network functions IMT-2020
network should support isolation of any network slice and virtual resource from all others.
Operators of IMT-2020 network should expose network capabilities to 3rd party ISP/ICPs via open APIs to
allow agile service creation, flexible and efficient use of the capabilities.

7.3 Converged access-agnostic and unified core network
Up until in the legacy IMT networks, the introduction of a new mobile technology has been accompanied
with a new type of packet core network. Therefore, the interworking between the new core network and
legacy core networks has always been a technical challenge to overcome.

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