Page 301 - ITU-T Focus Group IMT-2020 Deliverables

ITU-T Focus Group IMT-2020 Deliverables 5

8.2 Unified User Plane

8.2.1 Description
Control plane and user plane is a key design principle of IMT-2020. IMT-2020 core network user plane is
simplified to support basic function like DPI, forwarding, QoS related traffic control and so on. It is similar
with access gateway of fixed network (e.g., BRAS). Maybe, these core user plane functions can be unified to
realize the unified access control, QoS, mobility and so on.
8.2.2 Requirements

IMT-2020 FMC is required to provide the capability of unified network user plane including IMT-2020 core
network user plane function and access user plane of fixed network.

8.3 Access independence
8.3.1 Descriptions
The IMT-2020 network is envisioned to be an access network-agnostic architecture whose core network will
be a common unified core network for emerging new radio access technologies for IMT-2020 as well as
existing fixed and wireless networks (e.g., WLAN). The access technology-agnostic unified core network
should be accompanied by common control mechanisms which are decoupled from access technologies.
8.3.2 Requirements

Services and features offered via IMT-2020 FMC are required to be access-independent so that services are
offered to users regardless of how they gain access.

8.4 Quality of service
8.4.1 Descriptions

The IMT-2020 network is expected to be able to provide the required QoS for a variety of different devices,
different services, and different traffic characteristics. This requirement enables service level agreements to
support user and service requirements.

8.4.2 Requirements
IMT-2020 FMC is required to provide unified QoS mechanisms.

8.5 Mobility management
NOTE – To be added.

8.6 Connection management
8.6.1 Descriptions

The connection management capability is used by a multi-connection UE and a multi-connection capable
network to establish, release, and modify connections.

8.6.2 Requirements

IMT-2020 FMC is required to support the management of multi-connections. And this capability is required
to provide unified control all connections used by multi-connection UE.

8.7 Interworking

8.7.1 Descriptions

Different types of mobile communication schemes have different characteristics and coverage, in the
migration phase to the IMT2020 network, network deployment is not always fully consistent with existing
network coverage. When UE leaves out of IMT-2020 coverage to existing network coverage, IMT-2020 core
network is required to support interworking with existing LTE network to guarantee services.

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