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