5G-Advanced-Technology-Evolution-from-a-Network-Perspective-2021

5G-Advanced Technology
Evolution from a Network
Perspective (2021)
——Towards a New Era of Intelligent Connect X

The commercialization of 5G networks is accelerating globally. From
the perspective of industry development drivers, 5G communications
are considered the key to personal consumption experience upgrades
and digital industrial transformation. Major economies around the
world require 5G to be an essential part of long-term industrial
development. 5G will enter thousands of industries in terms of
business, and technically, 5G needs to integrate DOICT and other
technologies further. Therefore, this white paper proposes that
continuous research on the follow-up evolution of 5G networks—
5G-Advanced [1] is required, and full consideration of architecture
evolution and function enhancement is needed.
This white paper first analyzes the network evolution architecture
of 5G-Advanced and expounds on the technical development
direction of 5G-Advanced from the three characteristics of Artificial
Intelligence, Convergence, and Enablement. Artificial Intelligence
represents network AI, including full use of machine learning, digital
twins, recognition and intention network, which can enhance the
capabilities of network's intelligent operation and maintenance.
Convergence includes 5G and industry network convergence, home
network convergence and space-air-ground network convergence, in
order to realize the integration development. Enablement provides for
the enhancement of 5G interactive communication and deterministic
communication capabilities. It enhances existing technologies
such as network slicing and positioning to better help the digital
transformation of the industry.
Abstract
China Mobile,China Telecom, China Unicom, China Broadcasting
Network, SK Telecom, KT, CAICT
Huawei, Ericsson (China), Nokia Shanghai Bell, ZTE, CICT, Samsung,
AsiaInfo, vivo, Lenovo, IPLOOK, UNISOC, OPPO, Tencent, Xiaomi
(The list above is not in any particular order)
Source Companies

Contents
1 5G Development................................................................................................. 01
1.1 Progress.............................................................................................................................................01
1.2 Driving Forces..................................................................................................................................01
1.2.1 Industries Requirement.........................................................................................................................................................01
1.2.2 Network Technology Evolution..........................................................................................................................................03
2 5G-Advanced Architecture and Technical Trends......................................04
3 Key 5G-Advanced Technologies...................................................................... 06
3.1 AI for Network ................................................................................................................................06
3.1.1 Key Technologies of AI for Network................................................................................................................................06
3.1.3 Application.................................................................................................................................................................................07
3.2 Industry-Speciﬁc Networks .........................................................................................................08
3.3 Home Networks..............................................................................................................................09
3.4 Space-Air-Ground Networks .......................................................................................................09
3.5 Interactive Communications .......................................................................................................10
3.6 Deterministic Communications..................................................................................................11
3.7 User Plane Customization............................................................................................................12
3.8 Network Slicing ..............................................................................................................................12
3.9 Positioning, Ranging and Perception Enhancement ............................................................13
3.10 Multicast and Broadcast Services............................................................................................13
3.11 Policy Control Enhancement.....................................................................................................13
4 Conclusion ............................................................................................................ 14

01 5G-Advanced Technology Evolution from a Network Perspective
5G Development
01
The global commercial deployment of 5G networks is in full
swing. As of April 2021, 162 5G networks in 68 countries and
regions have been commercially released [2]. On top of this, over
a thousand industry-specific applications have been projected
to benefit from the advantages offered by 5G, such as high
bandwidth, low latency, and strong connectivity. In terms of
connectivity specifically, GSMA predicts that 5G will boost the
massive number of connections from 200 million in 2020 to 1.8
billion in 2025[3].
Overall, the global 5G industry is still in the early stages of
network construction. The industry generally believes that "the
future 6G technology" will not be applied until 2030. Therefore,
whether in terms of business scenarios, network technology,
industrial progress, deployment pace, etc., the next 3 to 5 years
will still be critical for 5G development.
For this reason, 3GPP initially determined 5G-Advanced as the
concept of 5G network evolution at the PCG #46[1] meeting
held in April. In the future, all aspects of the telecommunications
industry will gradually improve the framework and enrich the
content for 5G-Advanced starting from R18.
In the process of end-to-end 5G-Advanced network evolution,
the evolution of the core network plays a pivotal role. On the
one hand, the core network is connected to various services and
applications, which is the convergence point of the entire network
business and the engine of future business development. On the
other hand, the core network is connected to various standard
terminals and access networks, the whole network topology.
The center moves the entire body. Therefore, promoting 5G core
network technology and architecture evolution based on actual
business needs will help operators improve return on investment
and help industry users better use 5G networks to achieve digital
transformation.
1.1 Progress
1.2 Driving Forces
Unlike previous generations of communication networks,
5G is considered the cornerstone of the industry's digital
transformation. The world's major economies have requested
5G as an essential part of long-term industrial development.
For example, the European Union proposed the 2030 Digital
Compass (Digital Compass) plan, which formulated outlines
for commercial digital transformation and public service
digitalization. It adopted 5G as the basis for Industry 4.0. As the
first country to deploy 5G, South Korea has further strengthened
the construction of a 5G+ converged ecosystem and promoted
5G united services. Japan continues to promote the value of B5G
(Beyond 5G) to people's livelihood and society. China has also put
forward a long-term goal for 2035 driven by insisting on scientific
and technological innovation and deepening the "5G + Industrial
Internet" as its important current goal.
1.2.1 Industries Requirement

02
5G-Advanced Technology Evolution from a Network Perspective
Therefore, 5G-Advanced needs to fully consider the evolution
of the architecture and enhance functions, from the current
consumer-centric mobile broadband (MBB) network to the core
of the real industrial Internet. However, it is currently possible
to use network slicing, MEC (Multi-access Edge Computing),
and NPN (Non-Public Network) to serve the industry. Whether
it is network deployment status, business SLA (Service Level
Agreement) guarantee capabilities, easy operation and
maintenance capabilities, and some auxiliary functions needed
by the industry, the current capabilities of the 5G network are
still insufficient. Thus it needs continued to be enhancements in
3GPP R18 and subsequent versions.
First of all, in the future, XR (Extended Reality) will become
the main body of business carried by the network. Not only will
the definition of XR be upgraded from 8K to 16K/32K or even
higher, AR (Augmented Reality) business scenarios for industry
applications will also evolve from single-terminal communication
to multi-XR collaborative interaction and it will develop rapidly
beyond 2025. Due to the impact of business traffic and business
characteristics, XR services will put forward higher requirements
for SLA guarantees such as network capacity, delay, and
bandwidth. At the same time, essential communication services
still have a lot of room for development. Multi-party video calls
and virtual meetings represented by telecommuting will become
the norm. The current conference mode of fixed access and video
and call will transform into a multi-party remote collaboration
of mobile access and rich media and real-time interaction in
business. For example, corporate employees can access the
corporate office environment with virtual images at any time at
home and communicate with them. Colleagues communicate
efficiently. Therefore, 5G-Advanced needs to provide an upgraded
network architecture and enhanced interactive communication
capabilities to meet the business development needs of the
existing clear voice-based communication methods evolving to
full-aware, interactive, and immersive communication methods.
It should also enable consumer experience upgrade.
Second, industry digitization has brought about a much more
complex business environment than consumer networks.
Businesses in different industries, such as the Industrial Internet,
Energy Internet, Mines, Ports, and Medical Health, need
the network to provide them with a differentiated business
experience and provide deterministic SLA guarantees for
business results. For example, the Industrial Internet requires
deterministic communication transmission delays that are
bounded up and down, and intelligent grids need high-precision
clock synchronization, high isolation, and high security. Mines
need to provide precise positioning under the surface, ports need
remote gantry crane control and medical health needs real-
time diagnosis and treatment information, synchronization and
support of remote diagnosis with ultra-low latency. Therefore,
5G-Advanced needs to fully consider the deterministic experience
guarantee for industry services, including real-time service
perception, measurement, scheduling, and finally forming an
overall closed control loop. For different industries, 5G needs to
adopt public networks, local private networks, and various hybrid
networking modes to meet the industry's business isolation and
data security requirements. Therefore, 5G-Advanced should focus
on the network architecture, networking scheme, equipment
form, and service support capability that matches the diverse and
complex business environment.

The 5G-Advanced evolution is technologically presented as a
comprehensive integration of ICT technology, industrial field
network technology, and data technology.
The communication network after 4G fully introduces IT
technology, and the telecom cloud is generally used as the
infrastructure. In the actual telecom cloud landing process,
technologies such as NFV (Network Functions Virtualization),
containers, SDN (Software Defined Network), and API
(Application Programming Interface)-based system capability
exposure have all received actual commercial verification.
On the other hand, the network edge is the center of future
business development. Still, its business model, deployment
model, operation and maintenance model, especially resource
availability and resource efficiency, are pretty different from
the centralized deployment of cloud computing. The Linux
Foundation proposed that after introducing the concept of
Cloud Native to the edge, it also needs to combine the various
features of the border to form an edge native (Edge Native)
application form [4]. Therefore, the evolution of 5G-Advanced
needs to integrate the characteristics of cloud-native and edge-
native, achieve a balance between the two through the same
network architecture, and finally move towards the long-term
evolution direction of and cloud-network integration.
For CT technology itself, 5G-Advanced needs to exert its network
convergence capabilities further. These integrations include the
integration of different generations and different models of NSA/
SA, as well as the integration of individual consumers, family
access, and industry networks. In addition, with the evolution of
satellite communications, the 5G-Advanced core network will
also prepare for a fully converged network architecture oriented
to the integration of ground, sea, air, and space.
In addition to ICT technology, there will be more demand
from production and operation in the future, and OT
(Operational Technology) will bring new genes to mobile
networks. For example, the Industrial Internet for industrial
manufacturing is different from the traditional consumer
Internet. It has more stringent requirements for network
quality. It is necessary to consider the introduction of 5G
while supporting minimal networking. Quality inspection
scenarios based on machine vision require the network to
keep both large bandwidth and low latency capabilities.
Remote mechanical control requires the network to support
deterministic transmission, guarantees the number of
connections and bandwidth that can be promised, and the
intelligent production line for flexible manufacturing also
needs to be provided by the precise network positioning, data
collection, and other capabilities. For this reason, wireless
access networks need to have the reliability, availability,
determinism, and real-time performance comparable to
wired access. The integration of OT and CT will become an
important direction for the development of mobile networks.
5G-Advanced networks will become the critical infrastructure
for the comprehensive interconnection of people, machines,
materials, methods, and the environment in an industrial
environment, realizing industrial design, R&D, production, and
management. The ubiquitous interconnection of all industries,
such as services, etc., is an important driving force for the
digital transformation of the industry.
In addition, DT (Data Technology) technology will also inject
new impetus into network evolution. The development
foundation of the digital economy is a massive connection,
digital extraction, data modeling, and analysis and
judgment. Combining 5G network with big data, AI (Artificial
Intelligence), and other technologies can achieve more
accurate digital extraction and build data models based on
rich algorithms and business features. It can also make the
most appropriate analysis and judgments based on digital
twin technology and give full play to the digital impact which
will further promote the evolution of the network.
In summary, the full integration of DOICT will jointly drive
network changes and capacity upgrades and help the digital
development of the entire society in all fields.
1.2.2 Network Technology Evolution

04
5G-Advanced
Architecture and
Technical Trends
02
To meet the needs of personal consumer experience upgrades
and digital transformation of the industry. 5G-Advanced
networks need to continue to evolve from the architectural
and technical levels to meet diversified business demands and
enhance network capabilities.
At the architectural level, the 5G-Advanced network needs
to fully consider the concept of cloud-native, edge network,
network as a service, and continue to enhance network
capabilities and eventually move toward cloud-network
integration and computing-network integration.
-Cloud-native is a further cloud enhancement based on
the telecom cloud NFV to realize the flexible deployment
of 5G networks and the flexible development and testing
of functions more quickly. Cloud-native needs optimized
software to improve the utilization efficiency of hardware
resources, and a cloud-based security mechanism to achieve
internal security of the infrastructure.
-Edge network is an efficient deployment form that combines
distributed network architecture and edge services.
-The Network-as-a-Service model makes 5G systems highly
flexible and can adapt to various customized solutions for
vertical industry needs. The specific implementation form can
be 5G network slicing or independently deployed networks.
The SBA service-oriented architecture design of the 5G core
network goes deep into the network logic, helping operators
fully control the network and conform to the 5G network
development goal of "network as a service."
This is because SBA is designed so that 5G network functions
(NFs) could be developed stateless. It allows the NFs to
be modularized, flexible and more application-focused for
efficient communication. One of SBA’s important role is
to manage and control various communications between
NF services efficiently, by using request/response and
subscription/notification based methods. SBA’s framework
also allows robust scaling, monitoring and load-balancing of
NF services.
Operators use SBA as the network foundation, network slicing
as the service framework, network platform as the core,
and key network function APIs as the starting point to build
agile and customized 5G capabilities to help users deeply
participate in the definition and design of network services.
Operators need an increasing number of network features
accessible via APIs so that together with slicing they can
provide possibilities for automated differentiated business
experience and higher business efficiency for the users and
makes the connection and computing a powerful booster for
developing the 5G service industry.

Industries
Individuals
API
Ubiquitous access
Data
analytics
API
Cloud Native
Control plane
User plane User plane
Edge Network
NaaS
rtificial Intelligence
onvergence
nablement
Management plane
Based on requirements that will be raised in the future,
5G-Advanced networks need to have the characteristics of an
ACE: AI, convergence, and enablement.
• AI
As 5G develops, its applications and services are varying
among industries. This leads to related network functions,
management, and user behavior also becoming variable
as well as complex. The network scale is continuously
growing, but the conventional network needs heavy manual
configuration, which is labor-intensive and prone to errors.
Therefore, high management overhead has been added. It is
necessary to introduce intelligent assistance to improve the
capabilities and quality of services at all levels, from network
functions to network management.
• Convergence
The convergence of different access modes and networks
is the development trend of 5G-Advanced. Prior to the 5G
era, various industries built independent networks, which
were used for long periods, and diverse terminals, access
modes, and transmission approaches emerged. However, the
networks' low versatility led to the long iteration time of new
functions, high cost of equipment, and slow development of
technology. Therefore, the next-generation network, which
should connect the air and ground and accommodate the IIoT,
Wi-Fi, fixed networks, and other multi-industry and multi-
protocol services, has become essential.
• Enablement
With 5G being used in industries, network capabilities
continue to improve and gradually evolve from an
infrastructure to enable services. Introducing new capabilities,
such as deterministic networking, customization, high
reliability, global control and management, and self-evolution
to meet industry requirements, will facilitate the application
of NaaS. This will enable 5G-Advanced to provide industries
with customized networks featuring proactivity, flexibility, and
resource isolation.
Figure 2-1: 5G-Advanced network architecture

06
Key 5G-Advanced
Technologies
03
3.1 AI for Network
The introduction of network resource virtualization, 5G
service-oriented architecture, diversified services, and new
5G capabilities such as slicing and edge computing have
brought challenges to 5G operations and commercial use.
The application and integration of intelligent technology in
telecommunication networks can improve network efficiency,
reduce operation and maintenance costs, and improve the
level of intelligent network operation.
Starting from 3GPP Rel-16, to promote network intelligence,
continuous advancement has been carried out on the
technical standardization of network infrastructure (SA2)
and network management (SA5). NWDAF is a standard
network element introduced by 3GPP SA2 in 5G. It is an AI+
big data engine. It has the characteristics of standardization
of capabilities, aggregation of network data, higher real-
time performance, and support for closed-loop controllability.
3GPP defines the location of NWDAF in the network
and the interaction and coordination with other network
functions and defines the flexibility of NWDAF deployment.
NWDAF can be deployed in specific network functional units
through function embedding and can also be coordinated
across functional network units, to complete the closed-
loop operation of network intelligence. 3GPP SA5 defined
Management Data Analytics System (MDAS), which,
combined with AI and machine learning, enables automation
and cognition of the management and orchestration of
networks and services. The MDAS can mine data value in
network management by processing and analyzing network
management data. It can also generate analysis reports and
provide suggestions on network management and operations
to promote the intelligence and automation of closed-loop
network management and orchestration.
The evolution of 5G networks has increased the networks'
complexity and, in turn, their O&M. Networks are required
to be highly intelligent, automated, and autonomous.
The networks need to automatically adjust to meet the
rapidly changing service requirements according to changes
in themselves and the environment. They also need to
automatically perform the required network updates and
management based on service and O&M requirements. To
fulfill these requirements, the following AI technologies
can provide reference for the intelligent development of
5G-Advanced network.
3.1.1 Key Technologies of AI for Network

To realize the construction of intelligent network, empower
the digital intelligence transformation of the industry, 5G
networks require the continuous introduction of AI Internally,
it can better support connections, security, and management
and utilize AI algorithms to transform cloud-based big data
resources into intelligent planning, analysis, fault diagnosis,
and adaptive optimization capabilities.
3.1.2 Application
• Machine learning
As a basic network intelligence technology, machine learning
can be widely used in various nodes and network control
and management systems in 5G networks. Based on the
large amount of subscriber and network data in the 5G
system, combined with professional knowledge in mobile
communications, a flexible machine learning framework
has been adopted to build a network intelligent processing
system that will be widely used and support distributed and
centralized deployment.
• Digital twin
Digital twin technology can improve the monitoring and
control of the network and prediction of its condition, for
example its status and traffic, simulate and evaluate the
necessary network changes in advance to help greatly
improve digital network management.
• Cognitive network
Cognitive network technology uses algorithms empowered
with mobile communications expertise and fully utilizes the
big data analytics generated by the 5G network ,enhance the
intelligence of network operations to enable complex and
diverse services.
• Intent-based network
Intent-based network technology enables operators to define
their network goals, which the system can automatically
convert into real-time network operations. The network is
continuously monitored and adjusted to ensure network
operations remain consistent with the service intent.
In the future, a company can introduce advanced frameworks
such as federated learning to support the joint learning
and training of multiple network functional units. This can
effectively enhance the training effect and protect data
privacy. In addition, NWDAF can be deployed in layers, flexibly
build a distributed intelligent network system, that responds
better to different needs.
NWDAF
OAM
Data Repositories
Data Access
Delivery of
analytics data
AF
NF
AF
NF
Delivery of activity
data and local
analytics
Figure 2.2.2-1: General framework for 5G network automation[5]

08
AI can help 5G networks realize closed-loop optimization
of service experiences. First, user experience is intelligently
monitored and then evaluated. Then, the optimal strategies
are recommended through intelligent comprehensive analysis
based on service requirements and network capabilities.
Finally, policy adjustment and closed-loop tracking are
implemented through the service experience feedback
mechanism to balance network costs and service experience.
For example, a relationship model between user experience
indicators and QoS indicators is built through intelligent data
analysis and, based on this model, user experience of current
services is monitored and evaluated in real time. In addition,
differentiated QoS parameters that best match users, services,
and networks are generated by analyzing and mining users'
communication habits. Moreover, network slicing resources
and services are intelligently scheduled and optimized through
reinforcement learning and other optimization algorithms to
ensure premium experience of services delivered by network
slices. What’s more, AI-based multi-access collaboration
can ensure that multi-access resource is fully utilized with
improving user experience.
Externally, network intelligent technology makes full use
of the computing power, data and scene advantages of the
telecom industry to redefine the end-tube cloud ecology and
build a new business model of the telecom industry. Many
5G applications require the cloud, the edge, and end devices
to work together to implement and orchestrate services
with the assistance of data collection, model training, and
intelligent inference. To better use the available and ever-
changing computing and networking capabilities, AI needs to
be introduced to predict the computing and network loads,
as well as optimally schedule the computing, storage, and
network resources across the cloud, the edge, and devices.
Domain twin models can be used to simplify multi domain
orchestration problems which would ensures that services
can be practically and flexibly deployed and migrated on
heterogeneous cloud-edge-device resources to provide the
required service quality with optimal resource utilization.
The integration of 5G and industry networks will become a
key scenario for 5G-Advanced networks for vertical industry
customers. In the industry network, 5G network can bring
more business value, such as personnel protection, production
flexibility, and advantages in wireless and mobility. From the
perspective of networking, it can not only greatly reduce the
complexity and labor cost of wired networking but also help
industry customers realize the ideal of "one network at the
end." For example, in the field and workshop networking in
the industrial manufacturing field, 5G can simplify the multi-
level wired network level at the vertical level to achieve
network flattening. Based on the differentiated guarantee of
5G deterministic capabilities, 5G can realize the IT network
of the field network ( Such as equipment operation and
maintenance data collection) and OT network (such as PLC
control) into one.
The characteristic of the private industry network is to
provide third-party customers with a flexible and on-demand
customized network within the scope of their operation and
management. The 5G industry private network can integrate
the enterprise's network system with the 5G network to build
unified management and seamlessly integrated industry
networks.
Convergent industry-specific networks have been enhanced in
the following three aspects:
1) Enhancement of network intercommunication
5G-LAN technology can use 5G networks to replace local area
networks in the current industrial field. Solve cable mobility
limitations and high optical fiber laying costs in existing
industrial networks, and provide industry users with the
ability to quickly and flexibly build private mobile networks.
5G-LAN defines a virtual network through the concept of a
group and supports point-to-point and point-to-multipoint
communication within the group. The 5G-LAN group
can deploy one UPF or multiple UPFs and supports local
exchanges within UPFs and intra-group communication across
UPFs. The open API interface enables third parties to create
or modify communication groups flexibly, thereby realizing
dynamic group management. 5G Advance can enhance
5G-LAN technology in the following aspects:
-Further study the new requirements in industrial networks,
enhance the layer 2 data transmission of mobile networks
and expand the application scenarios of 5G-LAN in industrial
networks. For example, factory complex scenarios require
group communications with service continuity among
networks, dynamic group communications in 5G LAN, and 5G
LAN group QoS support.
3.2 Industry-Specific Networks

-At present, 5G-LAN only supports one group to be served
by a single SMF. In the future, it will be expanded to one
group spanning multiple SMFs, thus realizing wide-area
interconnection.
-Convergence of fixed network and mobile network, 5G-LAN
needs to communicate and converge with traditional
industrial wired LAN.
In addition, in the 5G industry private network networking,
enterprises can conduct unified management and plan
for terminal addresses. Constructing the N3IWF network
function can also support the integration and switching of the
industry's existing networks and 5G private networks.
2) Management
A central network management monitoring system replaces
the siloed management systems, simplifying network
management.
3) Security
The networks will meet enterprises' requirements for security
and reliability. The network for enterprise can be deployed
isolated from the public network and one possible way is to
support industry-specific network(e.g. PNI-NPN). In terms
of security, they will further support the network topology
hidden. An enterprise can also incorporate a firewall to filter
all data in its private network to ensure that confidential data
remains in the campus. The reliability of access, dedicated
resources, and connections is also improved.
Home networks will be a focus for developing 5G-Advanced.
Already now, many operators see a peak in mobile data traffic
when people are at home. This is likely to be even more so
with new services for consumers (e.g. mobile gaming, or high
definition mobile TV) that require every higher data rates.
High data rate services such as interactive applications are
best served at higher frequency bands, where more capacity is
available. However, these higher frequency bands make providing
indoor coverage a challenge. It may not be possible to provide
enough indoor capacity with outdoor base stations, relaying
or indoor base stations may be needed to give consumers an
ubiquitous coverage experience.
Unlike other areas where networks are deployed, there are more
devices of different types in home networks, though they move
around in much smaller areas. In addition, home network users
do not require extremely high reliability, but have stringent
requirements on protocol conversion and bandwidth.
In the future home intelligent IoT network, there will be various
devices and types of collected data. Finding the optimal way to
synchronously transmit this data, use AI algorithms to pre-judge
user behavior accurately, predict device status, and implement
intelligent adjustment will become the focus for the next-
generation home network.
3.3 Home Networks
The 5G network was built not only to provide high network
speeds, but also ubiquitous mobile network access. However,
in remote areas such as mountainous areas, deserts, and the
ocean, building and maintaining a 5G terrestrial network is
extremely expensive, which makes it impossible to provide 5G
network coverage in those areas. Fortunately, the development
of aerospace technology enables the satellite-based broadband
communication system to provide radio coverage to large
or even global areas at a much lower cost. As such, the 5G
network will deeply integrate with the satellite communication
system to constitute a convergent communication network
that provides seamless coverage on the planet, meeting various
service requirements anywhere in the world.
Current 5G networks supports the base station to adopt 5G
NR system, allowing terminals to access the unified 5G core
network through the satellite base station , and satellite
base stations working in transparent mode, but there are
some limitations on the support of voice service and higher
data rate. In the future, the 5G-Advanced network will
comprehensively integrate with satellites and provide the
following features:
- Support for the integration of the terrestrial 5G network
with satellite networks in orbit at different altitudes, for
example, different mobility management strategies for low,
medium and high orbit.
3.4 Space-Air-Ground Networks

10
- When providing wireless access, the satellite can work
in bent-pipe or re-generative modes to forward data
transparently and process on-board data, respectively. The
5G-Advanced network can support networking for satellite-
ground and satellite-satellite, in order to support terminals
to use both satellite access and ground access to optimize
data transmission no matter whether the satellite access
and terrestrial access belong to a single operator or different
operators. The 5G network can support enhanced mobility
management mechanisms for terminals connecting via
satellite access , such as access control based on terminal
location to meet regulatory requirements, terminal seamless
switching between satellite access and ground access, , policy
and QoS control based on the type of satellite access, and
network-based positioning to enable positioning of non-GNSS
terminals and to fulﬁll reliable UE location requirements for
regulated services.
- When the base station uses the back-haul service provided
by the satellite network or satellite enabled NG RAN, the core
network shall be able to perceive the status of the satellite
network (such as time delay, bandwidth, etc.) to facilitate
policy and QoS control considering the movement of satellites
and the entire constellation. This can also help to expose
the back-haul capability to the application layer to assist the
application adaptation.
Figure 3.4-1: 5G network integrated with a satellite system
N6
N1/N2/N3
5GC DN
UE NR Uu
RRU
NR Uu gNB
UE NR Uu
gNB-DU
F1 gNB-CU
UE NR Uu
gNB
NG
UE gNB
NR
Uu
NG
Satellite backhaul
As 5G coverage expands, the screens of smart terminals
increase in size, and AR/VR/XR devices develop rapidly.
Consumers expect more than the conventional voice and
video services and are increasingly anxious to experience
digital, highly interactive, and multisensory experiences[6].
In this context, real-time communications are becoming more
immersive, represented by HD video, AR/VR, and other emerging
technologies. This shift not only enhances individual services, such
as personalized calling, remote collaboration, AR social media,
and VR communications, but also helps enterprises establish
their image and carry out marketing more efficiently. For
example, enterprise information can be displayed to consumers
in calls from enterprises, improving the call connection rate, and
interactive menus can replace audio instructions in customer
services, helping customers select service options. Moreover,
exposing network capabilities help enable a new wave of
application innovation. Applications like ride-hailing, enterprise
campus communications, and remote education have been
inﬂuencing people's work and lives.
3.5 Interactive Communications

3GPP has defined deterministic communication capabilities
since Release 15. In Release 16, the deterministic capabilities
were further enhanced for the air interface, CN, networking
and integration, SLA assurance and URLLC. 3GPP Release
16 defined a 5G system as one or more bridges which can
be integrated transparently into an TSN architecture. On
top of this, 3GPP Release 17 sketched the deterministic
communication architecture for independent 5G TSN to adapt
to more networking scenarios. That being said, an overarching
architecture buttressing deterministic SLA fulfillment and QoS
from end to end has not been ready yet. This architecture
must be enhanced in the following aspects:
• Management and deployment
The management and deployment of deterministic network
services rely on accurate requirement conversion —
translating all service KQI requirements from industry players
into network KPI requirements and splitting all the KPI
requirements among different network domains and mapping
these KPIs to deterministic network capabilities.
Operators can utilize modeling and simulation to predict and
verify whether the conversion results can satisfy the service
requirements on a specific network. In this way, they can adjust
the network deployment and configurations in advance to
facilitate service rollout and mitigate the risks of service losses.
• Measurement and assurance
Applications that deliver deterministic performance need to
send packets at millisecond-level intervals, and thusly network
resources need to be scheduled highly flexibly and efficiently.
To ensure this, the KPIs related to latency, bandwidth, and jitter
cannot only be measured based on average values, but also
must be accurately guaranteed on the 5G-Advanced network.
• Scheduling and coordination
To ensure predictable, attainable QoS and SLAs for
deterministic services, every part of the transmission must be
scheduled flexibly and coordinated collectively.
- Applications need to notify the network of their access;
whereas the network needs to sense the formats and coding
approaches of various application data and recognize the
characteristics and priorities of related service flows, be it
from periodic services or those featuring random bursts.
3.6 Deterministic Communications
3GPP Rel-17 defines new requirements, 5QI and other QoS
parameters for cloud games and XR and other interactive
services. In the 5G-Advanced stage, interactive communication
also needs the following key technical support:
• IMS data channels
Existing real-time communications networks are overlaid with
IMS data channels, which enable screen sharing, AR effects, and
enhanced interactions with environments and things in them.
• Distributed convergent media
A unified convergent media plane is established to upgrade
basic audio and video services and facilitate new media
services like collaborative activities and AR/VR. The media
plane is deployed in a distributed manner, so that the nearest
media resources can be scheduled for services to ensure the
lowest possible latency and largest uplink bandwidth.
• Programmable call applications
Terminals are enhanced so that their web browser engine can
process service data in the IMS data channels in real time
and display the results on terminal UIs. This increases the
flexibility of services to an unprecedented level.
• Enhanced QoS
Multi-flow services are coded and transferred at different
layers, and the QoS of each layer is assured based on a
specific 5QI. Moreover, QoS control is implemented for
different data packets at a finer granularity, such as latency-
or reliability-based control. In addition, new QoS parameters,
including latency, reliability, and bandwidth, are introduced to
help ensure that all types of data, including that from tactile
sensors, is efficiently transmitted.
• Collaboration of multi-media communication data flows
All data representing service features is collected, facilitating
smooth coordination and central scheduling of different
service flows. This ensures that data packets synchronously
arrive at servers or terminals.
• Enhanced network capability exposure mechanism
For strong interactive business scenarios such as AR/VR, the
5G system and AF directly support better user experience and
more efficient use of network resources by exposing more and
more real-time information.

12
- Once an application has been sensed, the network needs to
schedule resources on demand, at an intra-flow, inter-flow,
or service level. In addition, the network quickly establishes a
closed-loop service assurance approach based on the services'
characteristics and priorities. With bidirectional interfaces,
the network controls data packet exchanges and coordinates
them harmoniously with the E2E resource scheduling.
Meanwhile, the network influences the application, pushing it
to adjust traffic to adapt to the network, and thereby avoiding
congestion caused by concurrent services.
- In addition, the network needs to better serve terminals by
using its enhanced features, such as providing active/standby
connections and supporting dual feeding and selective
receiving to set up reliable transmission paths.
• Based on the vertical’s requirement, 5G-Advanced will
enhance the bridge integration approach:
- In addition to the centralized TSN deployment model
stipulated by IEEE, 5G-Advanced shall support more models,
such as distributed deployment, to make networking more
flexible and deploy more new applications. and to make
services highly controllable and scalable.
• Timing service：Currently, most industries that require
precise time synchronization rely on the Global Navigation
Satellite System (GNSS) to manage their system time. To
address the problems of malicious attacks, electromagnetic
interference, weak indoor signals, and high power
consumption of receivers, the 5G system needs to provide
more flexible time services and serves as a backup or
supplementary system for the GNSS to ensure continuous and
accurate time synchronization for both individual users and
industry players.
UPF should be able to support different kinds of 5G services
from eMBB, URLLC, mMTC. As UPF is separated from control
plane functions, the architecture is now more focused on for
optimized packet-processing.
With the deployment of 5G networks, vertical industries have
increasingly clear requirements for 5G in edge scenarios..
5G UPF can be deployed and expand capacity according to
market demand, which requires 5G UPF to have flexible and
exposure capabilities, support function customization on
demand and be able to quickly go online.
Based on the SBA design, the invocation of user-plane
capabilities by other network functions can be supported.
Information such as precise location information, user
planeload conditions, network delays,slice related information,
billing, and additional specific information that industry
customers are concerned about can be exposure by 5G UPF.
3.7 User Plane Customization
Network slicing is a technology that enables networks to be
deployed on demand. It isolates multiple virtual E2E networks
above a unified infrastructure to meet various service
requirements. It is one of the key features of 5G SA. Many
standards organizations such as 3GPP, ITU-T, ETSI, and CCSA
have conducted standardization related to network slicing,
and the network slicing-related functions and technical
specifications have essentially reached maturity. To enable
network slicing to be commercially used in industries, the
following three areas need to be improved:
• Intelligent configuration
Network slicing-related configuration has been gradually
improved through standards. For example, 3GPP defines
the parameters and interfaces related to the Network
Slice Management Function (NSMF) and the Network
Slice Subnet Management Function (NSSMF) of each sub-
domain. However, these parameters still need to be manually
configured. Further work is required to find the optimal way
to implement automatic, intelligent closed-loop control for
these parameters to fulfill SLA requirements.
• SLA guarantee
Standards have defined the process for tenants to subscribe to
their target network slices from network administrators. After
subscribing to a slice, the tenant needs to be informed of QoS
conditions and the slice resource usage.
• Integration with vertical industries
To better serve vertical industries with network slicing,
vertical industries' typical requirements need to be considered,
for example, industry customers wish to manage their
slices themselves, such as self-service monitoring and data
query. If a vertical industry has deployed a private network,
industry users may need to access the 5G network slice for
the industry and then be directed to the private network. To
ensure smooth user experience, the 5G network slice and
private network must be concertedly coordinated.
3.8 Network Slicing

5G positioning facilitates personnel and vehicle locating,
logistics tracking, and asset management. As an increasing
number of services are gravitating towards MEC, positioning
capabilities are increasingly important at the network edge
and need to have ultra-low latency and high precision. For
instance, Vehicle to Everything (V2X) requires positioning
accurate to a centimeter level with a confidence of over
90%. The 5G Automotive Association has been carrying
out extensive research on reducing the transmission delay
of location information based on MEC-based deployment
of the location management function (LMF) and gateway
mobile location center (GMLC), as well as using reference
UEs to improve the accuracy and confidence of the location
information.
With the development of 5G network, new network
capabilities based on ranging and Perception are emerging.
For example, in some scenarios of smart home, smart city,
smart transportation, smart retail and Industry 4.0, there are
requirements of obtaining the relative position and angle
between objects, as well as perceive the distance, speed and
shape of the target object. 5G-Advanced network should be
further enhanced to assist the wireless network in ranging
and sensing capabilities.
3.9 Positioning, Ranging and Perception Enhancement
5G multicast and broadcast services can transmit multimedia
streams or data to various general 5G devices, which is
conducive to improving the efficiency of wireless resources
and the realization of innovative services. NR MBS is
very important for the realization of ARVR broadcast and
multicast, public safety local broadcast, V2X applications,
transparent IPv4/IPv6 multicast transmission, IPTV, wireless
software transmission, and Internet of Things applications.
5G networks need to consider the flexible and dynamic
allocation of resources between unicast and broadcast/
multicast services through 5G NR-MBS, providing substantial
improvements and new capabilities in terms of system
efficiency and user experience. In addition, the use of
artificial intelligence technology can achieve efficient resource
allocation according to the actual user experience. The 5G
network could further enhance the ability to support a flexible
mechanism for the ability of terminals to access broadcast
services.
3.10 Multicast and Broadcast Services
5G supports flexible policy adjustment by introducing UE
policy and user-based AM (access and mobility) policy
management functions. This function can already provide the
UE with capabilities such as user routing selection and access
network discovery, and provide the network with capabilities
such as wireless access mode, radio frequency selection
priority (RFSP Index), access area restriction, and UE AMBR.
In the follow-up 5G-Advanced research, operators need to
further explore the market application prospects of UE and
mobility management strategies. For example, user access
policy control under roaming conditions, Policy Control
can support a better QoS management by utilizing a fine-
grained QoS Monitoring, which effectively improves a service
assurance of UE sessions. Per-slice specific QoS control helps
efficient bandwidth management for supporting various
network deployments such as B2B and B2C. There is also
need to ensure user policy consistency between 4/5G systems
under the current 4/5G interoperability situation. To better
respond to requirements of high precision and low latency in
industrial applications, the granularity and distribution process
of existing policy management parameters need to be further
optimized.
3.11 Policy Control Enhancement

14
Conclusion
04
Mobile communication is always in a state of innovation
and development. Today, with the first phase of 5G
standards commercially deployed, the technology continues
to evolve and 3GPP officially names the 5G evolution as
“5G-Advanced” on April 27.5G-Advanced network will
define new goals and capabilities for the 5G evolution to
enable the generation of greater social and economic value
through network evolution and technological enhancements.
At this point, industry partners jointly publish this white
paper, hoping to provide reference for the development of
5G-Advanced network.
This white paper mainly introduces the 5G-Advanced
oriented network architecture and key technologies and
guides the next 5G network evolution stage. The network
architecture will develop along with the concept of cloud-
native, edge network, and network as a service to meet
the demands of rapid deployment of network functions
and on-demand iteration. In terms of network technology,
the 5G-Advanced network capability will continue to be
enhanced along the three aspects of "Artificial Intelligence,
Convergence and Enablement". Artificial Intelligent will focus
on improving the level of network intelligence, reducing the
cost of operation and maintenance, further promoting the
application and integration of intelligent technology in the
telecom network, carrying out the research of distributed
intelligent architecture, and the collaborative intelligence
between terminals and networks.Convergence will promote
the coordinated development of 5G network with industry
network, home network and space-are-ground network.
Enablement will support the 5G network serving the vertical
industry. While improving the representative capabilities
i.e.network slice and edge computing, 5G-Advanced network
will also support interactive communication and broadcast
communication to make network services "more diversified".
The network will become "more certain" based on the end-
to-end quality measurement and guarantee, and scheme
simplification.The network capabilities can be"more open" in
terms of time synchronization, location services, etc.
This white paper is expected to provide reference scenarios,
requirements and technical directions for the development
of 5G-advanced network, in order to motivate the industrial
consensus, and jointly promote the development of 5G
network.

Abbreviation Full Spelling
AF Application Function
AI Artiﬁcial Intelligence
AM Access and Mobility
AMBR Aggregate Maximum Bit Rate
API
Application Programming
Interface
AR Augmented Reality
B5G Beyond 5G
CT Communication Technology
DOICT DT, OT, IT and CT
DT Data Technology
E2E End to End
GMLC Gateway Mobile Location Center
GNSS
Global Navigation Satellite
System
LMF Location Management Function
MBB Mobile Broadband
MBS Multicast and Broadcast Services
MDAS Management Data Analytics
MEC Multi-access Edge Computing
N3IWF Non-3GPP InterWorking Function
Abbreviation Full Spelling
NF Network Function
NFV Network Functions Virtualization
NPN Non-Public Network
NSMF Network Slice Management Function
NSSMF
Network Slice Subnet Management
Function
NWDAF Network Data Analytics Function
O&M Operation and Maintenance
OSS/BSS
Operation Support System/ Business
Support System
OT Operational Technology
PLC Programmable Logic Controller
QoS Quality of Service
RFSP Radio Frequency Selection Priority
SBA Service Based Architecture
SDN Software Deﬁned Network
SLA Service Level Agreement
V2X Vehicle to Everything
XR Extended Reality
5G-LAN 5G Local Area Network
Acronyms and Abbreviations

[1] https://www.3gpp.org/ftp/PCG/PCG_46
[2] GSA 5G Market Snapshot, April, 2021
[3] GSMA Global 5G Landscape Q1 2021
[4] LF Sharping the Edge: Overview of the LF Edge Taxonomy and Framework
[5] TR23.791 Study of Enablers for Network Automation for 5G
[6] 5G VoNR+ Whit Paper, China Mobile Research Institute, November, 2020
References

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