NECOS Industrial Workshop (18-Oct, 2019): Network Slicing Perspectives

1. Network slicing
perspectives
Mateus Santos, Ericsson Research – Indaiatuba

2. Ericsson Internal | 2018-02-21
— Build a set of logical networks on top of a
shared infrastructure
— Each logical network is a slice
— designed to serve a defined business
purpose (i.e. $$$ service)
— comprises of all the required resources
configured and connected
— Slice created, changed and removed by
management functions
WaytoAchieveSlices

3. Ericsson Internal | 2018-02-21
DesignandCreateSlices
Service.. n
Massive IoT
Private Enterprise
Public Safety
FWA
5G Internet
Logical
Networks
Network Slice CatalogueNetwork Slice Catalogue
5G Internet
Public Safety
FWA
Private Ent.
“Visible”
Massive IoT
Health Care
2020+
Venue
…
NSI – Network Slice Instance
Network Slice
Orchestration
1
N
Network Resources/components
Access resources Transport resources Cloud resources Network function Network management
NST– Network Slice Template
Design
A small number of blueprints (NST) for
different logical network requirements
(latency, bandwidth, security)
Orchestrate
Realize blueprint instances (NSI) in
the network by configuring &
instantiating RAN, transport, cloud
resources and network functions
Manage
Maintain and manage the inventory of
instantiated slices and their
associated resources (operate, heal,
scale etc.)
Slice A
Slice B

4. Ericsson Internal | 2018-02-21
Automationiskeytocopewithnetworkcomplexity
Single data center with semi-
automated operations
Automated and Optimized Workload placement across Distributed Data Centers in
a multi domain, multi technology and multi vendor environment
Orchestration, Assurance & Analytics are essential to support a hybrid network that is increasingly becoming real-time
Today Tomorrow
slices
CaaS
VNF
IaaS
VNF
VNF VNF VNF VNF
VNF VNF VNF VNF
VNF
PNF
VNF
IaaS IaaS
VNF VNF
VNF VNF
App App
CaaS
VNFVNF
IaaS
Central datacenterAggregation cloudAccess cloud
App App
Central datacenter
VNF VNF
VNFVNF
Public cloud
VNF VNF
PNFPNF

5. Ericsson Internal | 2018-02-21
AcademiaandIndustry
Possibilecommonground
— Consider end-to-end slices
— Across RAN, transport, core
— Distributed cloud
— Transport network is a different domain in a high degree
— fronthaul with stringent requirements
— may not be flexible, e.g., paths for optical switches and wavelengths
— traffic should be mapped to right transport slices

6. mateus.santos@ericsson.com

7. Ericsson Internal | 2018-02-21
Questions
— Is the network slicing market developing rapidly?
— Do we have the somewhat basic capabilities in place, e.g., network slice assurance, healing and scaling
of VNF in VM/containers?
— Do we still have issues in adopting model driven? Are all the aspects of the model driven LCM in place?

8. Ericsson Internal | 2018-02-21
3GPP SA5 Definitions
— Network Slice
— A logical network that provides specific network
capabilities and network characteristics
— Network Slice instance (NSI)
— A set of Network Function instances and the
required resources (e.g. compute, storage and
networking resources) which form a deployed
Network Slice
— Network Slice Subnet Instance (NSSI)
— A set of Network Function instances and the
required resources (e.g. compute, storage and
networking resources) which form a deployed
Network Slice Subnet
— NSIs will be constituted by one or several
NSSIs
— NSSIs may be shared between several NSIs
— Communication Service Instance (CSI). Represents
a Customer Service/Offer
ServiceLCM-Reconfigurationofsharedentities

9. Ericsson Internal | 2018-02-21
NetworkSliceManagement&3GPP
Key 3GPP Definitions:
› Network slice is described by a Network Slice Template (NST):
describes structure, components and configuration of a network slice
› Network Slice Instance (NSI) is a graph of network functions (VNF,
PNF) connected together to build an end-to-end logical network with
specific requirements and capabilities
› Endpoints identify a network Slice by means of the Network Slice
Selection Assistance Information (NSSAI). NSSAI can be transmitted in
signaling messages between the UE and the Network
3GPP Slice Mgt & ETSI MANO relationship
ETSI MANO
E/// Service
Orchestrator

10. Ericsson Internal | 2018-02-21
AcademiaandIndustry
— Automation is crucial to network slicing
— should avoid manual steps for instantiation, upgrade, configuration etc.
— network slicing means the number of resource/VNF instances increases
— Cost should be proportional to the capacity of the automation system