5G Network Architecture and FMC Presented by Joe Wilke, Ericsson

2. 5G Network Architecture and FMC
Joe Wilke, Ericsson
July 2017

3. National sitesDistributed sitesAccess sitesDevices /
Local NW
Global sites
Application Cloud
Transport
Cloud Infrastructure
Management & Monetization
Access, Mobility, Network applicationsMobile
Fixed
Network Slices
Automation
Actionable insights
Service optimized
connectivity
Agility
Efficiency
Efficiency
Agility
Scale
Ericsson 5G core system
Key system areas

4. • Network Slicing is a key enabler supporting
– Separation of concern
– Diverging Use Cases and Requirement
– Multiple instantiations of same functionality
– Reduced TTM
• 5G Mobile Broadband is an evolution of
current 4G MBB, but using the Service Based
architecture as basis
• Support possibility for diverging architectures
for new services
• Automation and programmability important
part of target architecture
Overall 5G Core Architecture
Strategy

5. • The 5G core standardization should define a
functional architecture where implementation
technologies can be evolved and replaced over time
• Key principles:
– Prioritize interfaces to support Multi-vendor integration
– Scale UP and CP functionality independently
– Allow for a flexible deployment of UP separate from the CP
– Supporting authentication for both IMSI-based and non IMSI-based identities
– Allows for different network configurations in different network slices
– Abstract transport layer from 3GPP NFs
5G Core Network Architecture
Key Principles

6. • CP/UP Split
• NW slicing
• Service Based Architecture SBA
5G – New Concepts

7. 5G CORE architecture overview
Changes and improvements compared to 4G
S1-MME
S1-U S5
S11
HSS PCRF
Gx
S6a
PGWSGW
EPC today
MME
SGi
MMES1-MME
S1-U
S11
HSS PCRF
Gx
S6a
SGi
After CUPS
SGW
CP
PGW
CP
SGW
UP
PGW
UP
Mapping the EPC
functions to new
5G CN functions
N3 N6
N7
N4
UPF
SMF
PCFAUSF
NG11
UDM
N13
N8N12 N10
AMF
N15
Access &
Mobility
management
Function (AMF)
MME
User Plane
Function (UPF)
SGW
UP
PGW
UP
Policy Control
Function (PCF)
PCRF
Session
Management
Function (SMF)
SGW
CP
PGW
CP
MME
Authentication Server
Function (AUSF) and User
Data Management (UDM)
HSS/
AAA

8. Network
Services/Products
Logical
MBB Net
Logical
Enterprise Net
Logical
MDN
Network slice is a logical network
serving a defined business purpose or
customer, consisting of all required
network resources configured together. It
is created, changed and removed by
management functions.
• Logical network managed by a provider
• Enabler for services, not a service
• Mobile and fixed
• Resources may be physical or virtual, dedicated
or shared
• Independent/”Isolated” but may share resources
• May integrate services from other providers,
facilitating e.g. aggregation and roaming
• May include management functions and possible
exposure of control/management to customer
Access
Resources
Nw
Function
Netw.
Mgmt
Transport
Resources
Cloud
Resources
Resources/Components
Network Slices
NW Slice
Mgmt
Ericsson Internal | © Ericsson AB 2015 | 2015-11-06 | Page 8
Network Slice Definition
One Network – Multiple Industries

9. Federated Network Slicing
Service Providing operator
NW Slice for
hosted service
VNF
Business Customers
Partner Operator
Service
NW Slice
SLA
Orchestration
Service
NW Slice
SLA
Orchestration
Enable seamless service experience and service control
vUPvCoreNW Slice

10. Service Based Architecture
3GPP TS 23.501 V1.0.0 (2017-06)
Reference point representation.
shows the interaction that exist between the NF services in the network
functions described by point-to-point reference point (e.g. N11)
between any two network functions (e.g. AMF and SMF).
Service-based representation,
where network functions (e.g. AMF) within the control plane enables
other authorized network functions to access their services
UE (R)AN UPF
AF
AMF SMF
PCF UDM
DNN6
N1
NRFNEF
N3
N2 N4
AUSF
Nausf Namf Nsmf
NpcfNnrfNnef Nudm Naf
AMF PCF
UE (R)AN UPF DN
N13
N7
N3 N6
N2 N4N1
AFN5SMFN11
N9
AUSF
N8N12
UDM
N10
N14 N15
Authentication Server Function (AUSF)
Core Access and Mobility Management Function (AMF)
Data network (DN), e.g. operator services, Internet access
or 3rd party services
Network Exposure Function (NEF)
NF Repository Function (NRF)
Policy Control function (PCF)
Session Management Function (SMF)
Unified Data Management (UDM)
User plane Function (UPF)
Application Function (AF)
User Equipment (UE)
The 5G architecture is defined as service-based and the interaction between network functions is represented in two
ways. Network functions within the 5GC Control Plane shall only use service-based interfaces for their interactions.

11. NG UE
N2
N3 N6
N4
5G
RAN UPF
SMFAUSF
N1
AMF
5G CORE architecture
Functional view – service-based representation
AFPCFUDM NEF
NamfNausf
NpcfNudm
Nsmf
Naf
Data Network
(e.g. operator
or Internet)
NRF
Nnrf
› Network Functions within the 5GC
Control Plane (CP) use Service-Based
Interfaces (SBI) for their interactions:
› A CP NF can provide one or more NF
Services Nnef
AF Application Function
AMF Access and Mobility Management Function
AUSF Authentication Server Function
NEF Network Exposure Function
NRF Network Repository Function
PCF Policy Control Function
SMF Session Management Function
UDM Unified Data Management
UPF User Plane Function

12. NF A
Request
Reply
Service-based interface in 5GC
Services and Operations
NF B
NF Service A1
Consumer
NF Service B1
Consumer
NF Service A1
Producer
NF Service B1
Producer
Subscribe
Notify
Service Based Interface (SBI)
NF Service Operation
› A Control Plane Network Function can provide one or more NF Services
› A NF Service consist of operations based on either a request-response or a subscribe-notify model
› Common control protocol using e.g. HTTP based API, replacing protocols like e.g. Diameter

13. 5G EPC architecture overview
Functional view – non-roaming RAN-CN interaction
Data Network
(e.g. operator
or Internet)
LTE/EPC UE
NR/EPC UE
S1-MME
S1-U SGi
Gx Rx
Sx
LTE + NR
RAN
SGW/
PGW UP
SGW/
PGW CP
PCRF
EPC NAS
S11
HSS
S6a
MME
S10
LTE RRC
LTE PDCP
LTE Uu
S5
› Enables early introduction of NR through
connectivity Option 3
› UE anchored to network over LTE/EPC
control plane
› Wide area coverage through LTE with NR
as capacity boost

14. 5G Standards plan
2015 2016 2017 2018 2019 2020
IMT-2020 Requirements IMT-2020 Proposals
IMT-2020 Evaluation
WRC WRC
WSITU IMT-2020 Specs
Rel-14Rel-13 Rel-15 Rel-16 Rel-17, ...
Study on next generation network (technical realization, self evaluation)
5G/NR Phase 1 5G/NR Phase 2
LTE evo LTE evo LTE evo
3GPP
Phase 1: Rel-15 RAN + Core
targeting first phase of
deployments 2020
Phase 2: Rel-16
targeting ITU IMT-
2020 submission