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Introduction to 5G Packet Core

The 5G Packet Core supports several radio access technologies, including 5G NR (New Radio) RP-segment, enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), and low latency communication (LTC). The 5G Packet Core is flexible and easy to use while maintaining high performance. A protocol stack defines which features each node in the network supports; this separates various functionalities into separate modules. 5G Packet Core is the controlling element of 5G networks and performs switching, routing, connection management and policy enforcement. It is responsible for user registration and session management. Generally, it is implemented in a centralized form on top of existing network infrastructure such as 4G/LTE macro nodes, or on a distributed basis including small cells within a neighborhood. The 5G Packet Core is based on the Internet Protocol Suite to provide end-to-end connectivity between user equipments (UEs) and services with LTE being used as its key interface to external networks connected via the Internet. 5G Packet Core is a network function providing an environment for applications to run and that can be assigned specific traffic according to the signaling needs of different services. It includes applications and functions including mobility management, session management, user plane packet processing, transport layer packet processing, connection management and policy management.

5G Service based architecture description

5G Packet Core (5GC) is a new mobile interworking architecture (MIWA) that is designed as a flexible and scalable system dedicated to flexible core functionalities. This white paper explains the CCN light-based network architecture for 5G packet core, which was developed as part of 3GPP’s 5GC. As well as incorporating new architectural elements, the CCN light technology is aimed at addressing the issues of agility and scalability required during the evolution towards 5G networks. 5G packet core is a key element in 5G network. The 5G network architecture consists of three pillars: RAN, transport, and core. The transport layer uses high speed wireless and wired communication to provide connectivity for devices in dense deployments and high mobility environments with high throughput traffic, whereas the Core – provides advanced packet processing for segmentation/concatenation, header compression & encryption functions. 5G Packet Core is a set of information and communication technologies that control the transmission of data, voice and video traffic over wireless access networks. 5G Packet Core is an all-IP network that provides service access. It connects services and applications to radio interfaces, and provides control and management capabilities by providing a control plane function and a data plane function. The 5G PC is the centralized part of the 5G Core Network that provides all the necessary functions for delivery of services to the user equipment in an efficient manner. It is in charge of resource allocation, call setup and teardown and mobility management. The 5G Packet Core is the platform for 5G radio access and transport networks. It enables service providers to deploy new business models and services, such as network slicing, IoT, MEC and centralized cloud architecture through direct connectivity with the C-RAN. 5G Packet Core (5GC) consists of the 5G core network and its underlying intelligent programmable software-driven control plane, which are capable of providing various services for both user plane and control plane. These include transport, mobility management and session management, radio resource management and admission control. Packet Core is the core function of 5G. It is responsible for packet routing and forwarding for all user plane services, transporting user data packets in a mobile network, which includes Packet Routing and Forwarding (PRF), communication switch and buffer management for communication traffic between Serving Radio Node B(SRNB) and Serving Gateway (SGW).

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