5G + Cloudification = Slicing
Luis M. Contreras
Telefónica GCTIO – Transport Technology and Planning
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NECOS Industrial Workshop, Campinas (Brazil)
18.10.2019

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• The driver: 5G
• The enabler: Cloudification
• The product: Slicing
Agenda
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5G
The driver
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5G implications
Requirements
• 10x bandwidth per
connection
• Low-ms latency
• Five 9’s reliability
• 100% coverage
• >10x connections
• 50Mbps per connection
everywhere
• 1000x bandwidth/area
• 10 year battery life
• Reduction in TCO
Applications
• Enhanced Mobile BB
• Connected vehicles
• AR/VR
• S-UHD/3D Video
• Haptics/Sensing
• Massive IoT
• Remote machine control
• Mission critical services
• Fixed-wireless access
• …
Customer segments
• Consumer
• Auto industry
• Health
• Industry 4.0
• Agriculture
• Smart City/Public sector
• Smart building
• Utilities
• Education
• Transport
• …
MNO biz model
• B2C
• B2B
• B2B2C

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5G Ready Transport Network
5GTransportNetwork
 Upgrade of nodes’ capacity in the Telefónica IP FUSION
architecture, with higher bit rate interfaces, mainly at NNI
 Generalized upgrade of capacity also at UNI (10G/25G for Access, 50G/100G for
Aggregation) leveraging on spread computing capabilities to offload the backbone
 New bands for µW/mmW microwave backhaul
 Upgrade of HW platforms of the nodes, in order to support
new data plane technologies
 eCPRI support for VRAN
Evolutionary path foreseen for generalized deployments in Telefónica networks in three waves
• Wider deployment of RAN functional
splits
• Densification in the access, increasing
the number of connected sites
• Virtualization of 5G core, creating
diverse service anchors
• Control plane and user plane
separation
DU
Deterministic network Performance
optimized network
DRAN
CPRI
eCPRI
Edge Compute
Core Data Center
vCU
Disaggregation
(Open Networking)
Virtualized Flatter & high
capacity network
LTE
5G
Content/Services
Virtualized
Content/Services
Logical layout
Increase of existing
4G capacity
eMBB 5G services
uRLLC 5G services
2020-2021
2021-2022
2022-2023
iFUSION (Control Plane Architecture): standards-based
SDN interfaces enforcing Traffic Engineering

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5G Ready Transport network: technology
Data Plane Control Plane
5GTransportNetwork
• Need for traffic differentiation in order to segregate traffics from
different services and tenants
• Reduction of latency (uRLLC)
• Delivery of high BW (eMBB): Higher speeds (25/50/100) towards
network access
• Dual core E-band HW for 20 Gbps over a single link in short term
(W & D-bands for +30Gbps capacity in short-distance, p-t-p LOS
• Flexible and fast reconfiguration of transport network leveraging on
source routing supported by control plane elements (e.g., PCE)
• Unified orchestration including different network domains and
virtualization infra (UNICA)
• Slicing as form of logical separation of services supported on top of
the same infrastructure
• Programmability through standard data models
HW SW
DetNet introducing determinism in
the service delivery
TSN enabling frame preemption and
rich queue management
Flexible Ethernet allowing rapid
cross connection at MAC level
Source routing protocols for
flexible traffic steering
25/50/100 Gb Bi-Di for
saving fibers
Telemetry enabling intelligent diagnosis
and proactive control and management
Traffic engineering to
manage service constraints
Slicing incorporating mechanisms for
soft or hard slicing
Synch including frequency
and phase reqs of 5G Standard data models to
enable programmability
• Extended fiber connectivity to the sites complemented by +Gbps capacity wireless transport (MW, mmW (E & D bands))
• New data planes for guaranteeing deterministic delay and protocols enabling flexible anchoring, supporting hard and soft slicing
• Stringent synchronization requirements
• Increased maturity of whiteboxes for commoditizing site connectivity
Alternative Topologies and new technologies are needed for 5G
Synchronization
• Mandatory Frequency & Phase Synchronization for LTE-A and 5G.
• More stringent requirements for synchronization (+/- 500ns PDV
or less).
• Distributed Grand Master Clocks at HL4-level with Partial On-path
support, ePTRC and SyncE to improve holdover in case of GNSS
signal loss. Full On-path support mandatory for future sync
distributions.
Technology Radar

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Cloudification
The enabler
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Cloudification approach
TRANSPORT/CONNECTIVITY
CORE NETWORK
ACCESS
CUSTOMERS
~ 7k COs
Transformation
Plan
IT-Data Centers
Current Network
IT TOWARDS THE EDGE
Network To Be
LOCAL EDGE DATACENTERS
CENTRAL DATACENTERS
n1~10
<10ms
n3~1k
<1ms
…..
…..
~ 3.000 COs
IT IT
IT
CORE CORE
CORE
Tier4 DCs Tier4 DCs
MAIN EDGE DATACENTERS
n2~100
<5ms
…..IT CORE

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Deployments will depend on the country
geography and context
Need to leverage on third party infrastructures for e2e service

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Multi-domain
perimeter
Main Central Office
Core Central Office
Big Datacenter
Consolidated Central Office
Aggregation Site
Regional Site
Distributed Central Office
Pre-Aggregation Site
Micro Datacenters
San Jose
Palo Alto
San Mateo
Santa Clara
Mountain View
Cupertino
Access Site
Radio Site
Customer Site
Multi-Access Network
Metro Network
Core Network
Fixed Mobile Mobile
Mobile Mobile
Fixed
Mobile
Mobile
Fixed
• Telco operators
• MVNOs
• Cloud providers
• Municipalities
• Utilities
• etc

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Network Slicing
The product
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5G + Cloudification = Slicing
Bandwidth(Mbps) Latency(us) Connections(/km2)
eMBB mMTC uRLLC
• Tree strucuture → Per-service Structure
• Static nature → Dynamic nature
• Separated management per segment → Unified orchestration
• Single domain → Multi-domain

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The Slice as a Product
Enterprise
Customer
Data
Centre
Apps
Orchestration
Enterprise
Customer
Data
Centre
Apps
Orchestration
UE
MEC
(RAN, CN)
MEC
(RAN, CN)
MEC
(RAN, CN)
MEC
(RAN, CN)
MEC
(RAN, CN)
C-RAN
CN, Policy
VNF
(V)UPF
Transport
VNF
Orchestration Layer
RAN Orchestration CN Orchestration Transport Orchestration
Enterprise
Customer (or SI)
Data
Centre Apps
Orchestration
(Network Splicing)
CN, Policy
VNF
CN, Policy
VNF
CN, Policy
VNF
2G, 3G, 4G Slice
NB-IoT, LTE-M slice
Wi-Fi Slice
Fixed Line Slice
VNF
vCPE
Inter-orchestration
system interface
One (or more) 5G slice per
enterprise customer
Potentially multiple other network slices
per network customer