5g Network Components from Radio to Core

The 5G network is made up of several key components, each playing a crucial role in delivering fast and reliable connectivity. These components work together seamlessly to provide an exceptional user experience.

The 5G radio is the first point of contact for mobile devices, converting radio waves into digital signals that can be understood by devices. This component is responsible for transmitting and receiving data between the network and devices.

From the radio, data is transmitted to the 5G base station, which amplifies the signal and forwards it to the core network. This process ensures that data is transmitted quickly and efficiently.

The 5G core network is the brain of the operation, responsible for managing traffic, authenticating users, and providing services such as voice and video calling. It's where the magic happens, making 5G connectivity possible.

Consider reading: Radio Network Controller

The 5G network is made up of two main subsystems: the Radio Access Network (RAN) and the Mobile Core. The RAN manages the radio spectrum, ensuring it's used efficiently and meets the quality-of-service requirements of every user.

For your interest: 5g Radio Access Network

The RAN is composed of various components, with the eNodeB (or eNB) being a crucial part. The eNB is responsible for managing the radio spectrum and is often referred to as the Base Station.

The Mobile Core is a bundle of functionality that provides Internet (IP) connectivity for data and voice services. It ensures that this connectivity meets the promised QoS requirements, tracks user mobility to provide uninterrupted service, and tracks subscriber usage for billing and charging.

The Mobile Core is partitioned into a Control Plane and User Plane, also known as CUPS (Control and User Plane Separation). This architectural feature is similar to the control/data plane split found in the Internet.

Here's a breakdown of the main components of the Mobile Core:

The interaction between these components is crucial for providing seamless services to mobile subscribers.

A Radio Access Network is the part of a 5G network that connects devices to the rest of the network. It's essentially the bridge between your mobile device and the internet.

The Radio Access Network is made up of several components, including base stations, antennas, and transmission towers. These components work together to provide a reliable and fast connection.

In a 5G Radio Access Network, base stations are equipped with massive MIMO technology, which allows them to serve multiple devices at the same time. This technology is a key feature of 5G networks, enabling faster data transfer rates and lower latency.

Intriguing read: Access Network

Radio access is a critical component of a Radio Access Network (RAN). It's responsible for connecting mobile devices to the core network.

The radio access network uses a variety of technologies, including 4G and 5G, to provide high-speed mobile broadband services. This allows users to access the internet and make calls from anywhere.

Radio access networks are typically made up of base stations, also known as cell towers, which transmit and receive radio signals to and from mobile devices. These base stations are usually connected to a central hub, which manages the flow of data.

The capacity of a radio access network can be increased by adding more base stations or using advanced technologies like Massive MIMO. This can help to support more users and improve the overall performance of the network.

Explore further: How to Connect Devices to Verizon 5g Home Internet

Small cells are low power base stations used in LTE advanced versions and 5G technology to power devices in a smaller geographical area like few hundred meters up to 2 KM radius.

They use millimeter waves to transmit and receive data, which aren't suitable for long distance communication due to higher distortion from atmosphere and obstacles.

Compared to conventional base stations, a large number of small cell units are required to cover a larger area.

Small cells can provide higher data rate and low latency network coverage for the users under each unit.

Expand your knowledge: Storage Area Network

Beamforming is a smart technology concept that efficiently transmits data to user devices by tracking their precise location using advanced software algorithms.

Conventional base stations transmit data in multiple directions, causing higher power consumption and unnecessary resource utilization.

The signal beam will follow the user according to the changing location, just like a spotlight follows a moving performer on a stage.

This technology allows for precise data transmission, reducing power consumption and resource utilization.

By transmitting signals only in the direction of the user's location, beamforming maximizes data transmission efficiency.

Full Duplex Mode is a game-changer in radio access networks, allowing for simultaneous transmission and reception of data.

In conventional transmission methods, only one mode of transmission is possible in either direction, but with full duplex mode, high-speed switches efficiently switch data transfer in each direction, fully utilizing the existing spectrum.

This means the same frequency band can be used for both transmission and receiving modes of operation, making it a more efficient use of resources.

The 5G Core Network is a crucial part of the 5G network architecture, and it's responsible for providing external packet data network connectivity to mobile subscribers.

The main function of the Mobile Core is to ensure that subscribers are authenticated and their observed service qualities satisfy their subscription SLAs.

The Mobile Core is also responsible for managing all subscribers' mobility by keeping track of their last whereabouts at the granularity of the serving base station.

In 5G, the Mobile Core is heavily influenced by the cloud's march towards a microservice-based (cloud native) architecture.

This shift to cloud native opens the door to customization and specialization, allowing the 5G Mobile Core to evolve and support new use cases such as massive IoT.

The 5G System architecture consists of several network functions (NF), which are software-based and can be adapted according to need.

Here are some of the key network functions in the 5G System:

The modularity of the network functions also opens up the possibility to enable network slicing, which allows for multiple virtual networks to be created on top of a physical network infrastructure.

The 5G Core Network is divided into a Control Plane and a User Plane, which is similar to the control/data plane split that someone familiar with the Internet would recognize.

Related reading: Radio Link Control

5G network components offer a range of deployment options, including Stand-Alone 4G and Stand-Alone 5G, but we'll focus on the incremental phasing strategies that involve connecting new 5G base stations to existing 4G-based EPCs.

Expand your knowledge: 4g Phone on 5g Network

There are two general strategies for incremental phasing: refactoring the components and adding NG-Core capabilities over time, or implementing a backward-compatible NG-Core that can support both 4G and 5G base stations. This is crucial because the closer we get to implementation details, the more specific we need to be about whether we're using 4G components or 5G components.

The open source community is incrementally evolving its 4G code base into its 5G-compliant counterpart, which is a good thing because it allows for a smoother transition from 4G to 5G.

One of the key benefits of 5G is its service-based architecture, which is a game changer compared to previous generations of core networks. This new architecture allows for easier scaling and interconnection scenarios between network elements, as well as support for different types of traffic, such as Wi-Fi and satellite networks.

A fresh viewpoint: Generations of Network 1g 2g 3g 4g 5g

The C-RAN architecture is a game-changer for modern LTE networks.

In conventional RAN, the base band unit (BBU) is typically located near the base stations, requiring a large number of deployments.

Removing the base band units from the base stations can significantly reduce the complexity of management.

This shift to a centralized processing station connected to base stations via an optical fibre cable provides increased access, power saving, and cost savings.

The C-RAN architecture is an advanced technology that centralizes the base band units for more efficient management.

Worth a look: Network Band 5g Tmobile

There are three main deployment options for transitioning from 4G to 5G, as outlined by 3GPP.

The first option is Stand-Alone 4G / Stand-Alone 5G, but let's focus on the more complex scenarios.

Non-Stand-Alone (4G+5G RAN) over 4G's EPC and Non-Stand-Alone (4G+5G RAN) over 5G's NG-Core are two general strategies for incremental phasing.

To connect new 5G base stations to existing 4G-based EPCs, you can incrementally evolve the Mobile Core by refactoring the components and adding NG-Core capabilities over time.

Intriguing read: I Have a 5g Phone but It Says 4g Verizon

Implementing a backward-compatible NG-Core that can support both 4G and 5G base stations is another approach, where the new NG-Core could be implemented from scratch but would likely start with the existing EPC code base.

Here are the three deployment options in a nutshell:

The 5G core network architecture is a game changer, and for good reason. It's designed to handle the increasing demands of industry use cases, unlike its predecessors.

One of the main issues with 4G core networks was their inability to scale and interconnect with other networks, such as Wi-Fi and satellite networks. This limited their capabilities and made them less versatile.

5G core networks, on the other hand, are software-based and can be adapted to meet specific needs. They're also more modular, which allows for the creation of virtualized network functions.

The 5G system architecture consists of several network functions, including the Authentication Server Function (AUSF), Core Access and Mobility Management Function (AMF), and Data Network (DN). These functions are designed to work together seamlessly.

Here are the main network functions of the 5G core network:

The interaction between network functions can be represented in two ways: service-based and reference point-based. The service-based representation allows network functions to access each other's services, while the reference point-based representation focuses on the interactions between pairs of network functions.

The 5G system architecture is designed to be more flexible and adaptable than its predecessors, making it better equipped to handle the demands of industry use cases.

For your interest: 5g Core Network Functions

The 5G network is a game-changer, and understanding its components is essential. The 5G core network is designed to be flexible, adapting to the needs of various users, including those seeking high-speed internet and low latency.

The 5G core network is based on Service-Based Architecture (SBA), which enables easier integration of new features and functions, as well as manipulation of the system's composition.

A key aspect of SBA is the Reference Point architecture, which allows different entities within the core network to interact with each other without preconditions.

Consider reading: Network Architecture

The 5G core network is also made up of various components, including the Access and Mobility Management Function (AMF), the Session Management Function (SMF), the Policy Control Function (PCF), the User Plane Function (UPF), the Authentication Server Function (AUSF), and the Unified Data Management (UDM).

Here's a brief overview of how these components relate to their EPC counterparts:

The 5G core network also includes the Network Repository Function (NRF), which has a different role compared to the DNS service. While DNS relates to IP addresses to domain names for end services, NRF relates to the network functions in the 5G core.