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IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
5G Architecture Viewpoints
H2020 5G PPP Infrastructure Association
5G PPP 5G Architecture White Paper ( July 2016, August 2017)
5G-PPP Cognitive Network Management for 5G White Paper (March 2017)
https://5g-ppp.eu/white-papers/
Prof. Alex Galis
http://www.ee.ucl.ac.uk/~agalis/
a.galis@ucl.ac.uk
Communications and Information Systems Group
Department of Electronic & Electrical Engineering
University College London,
Torrington Place, London WC1E 7JE, United Kingdom
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Content
5G Networking
5G Functional Description and Programmability
5G Management & Security
5G Network Slicing
Concluding Remarks & Acknowledgement
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Arpanet Rough sketch by Larry Roberts
ARPAnet Plan – late 1960s – Early TestBeds
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
5G Networking
5G Networking is driven by
• an evolution in terms of higher capacity, performance
and spectrum access in radio network segments; and
• an evolution of native higher flexibility and
programmability conversion in all non-radio 5G
network segments: Fronthaul and Backhaul Networks,
Access Networks, Aggregation Networks, Core
Networks, Mobile Edge Networks, Edge Clouds
Software Networks, Software-Defined Cloud Networks,
Satellite Networks and IoT Networks.
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
5G Networking
5G Networking is dependent logically and functionally on the followings key separation of concerns:
• Serving at best high diversity types of communications (Human & Machines & Devices & Sensors &
Edge Systems) with different performance attributes.
• Separation of concerns between control/management/softwarization/services
• Separation of concerns between logical / physical resources functions (i.e. connectivity, compute
and storage resources) and network capabilities
• A shift in networking and a transition form “network of entities”, as in current systems, to
“network of (virtual) functions / capabilities“. As such “network (virtual) functions” are units of
networking.
• Network softwarization including network slicing. Hosting services executions in one (or more)
Slices. Network softwarization includes functions for programmability of
(1) network devices;
(2) network (virtual) functions;
(3) network slices;
(4) network services and applications;
(5) data, control, management planes.
• Supporting on demand composition of network functions and network capabilities
• Leveraging natively Network Softwarization technologies in all network segments and network
components.
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Network Slicing
End user
and operational
services
Integrate
Heterogeneous
Technologies
Integrate
Communication
and Computation
Native
Softwarization
Physical Resources
View
Applications and Business
Services View
Infrastructure
Control
View
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Network
Function
Layer
Orchestrator
Business
Function
Layer
Business
Service Layer
Infrastructure
Layer
RAN and wireless
backhaul
Core CloudEdge Cloud
Optical
Core
Network
Optical
Metro
Network
Optical and
Satellite
Access
Network
Edge Cloud
Network
Function
Repository
Vertical #1 Services
(e.g., Factory of the
Future)
Mobile broadband
Services
Vertical #2 Services
(e.g,, Automotive)
Service
#1
Service
#2
Service
#3
Service
#1
Service
#2
Service
#3
Service
#1
Service
#2
Service
#3
Vertical #1
Function
Repository
Vertical #2
Function
Repositor
y
Vertical
#3
Function
Repositor
y
OpticalWireless Cloud
Northbound interface Operator A
Network
Function
Repository
RAN and wireless
backhaul
Core CloudEdge Cloud
Optical
Core
Network
Optical
Metro
Network
Optical and
Satellite Access
Network
Edge Cloud
Northbound interface Operator BFrom Server
5G Networking Functional Layers
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Wide Area
Network
Resourc
es &
Function
al Level
Wireless and fixed
access
Edge
Cloud
Network
Level
Service
Level
Core/Ce
ntral
Cloud
Network Operating System
Programmable
Ctrl
E2E Secure Service Orchestrator
Slice #1:
Automotive /
Factory
Slice #2: IoT
Recursive
Model
Programmabl
e Ctrl
(SDN-C)
Programmable
Ctrl
AMF
SMF
UPF
AMF
UPF
SMF
SMF
SMF
SecureNetworkandServiceManagement
5G Architecture
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Content
5G Networking
5G Functional Description and Programmability
5G Management & Security
5G Network Slicing
Concluding Remarks & Acknowledgement
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Optical Core
Network
Optical Metro
Network
Edge
Cloud
Optical Access
Network
Front-/Backhaul
Network
Radios
Core
Clouds
Integrated System Mgmt.
and Operations
(E2E /Concatenated Network segments,
FCAPS functionality, Network Information
Management, Multi domains operations,
In-network data/operations processing)
Multi-Service Mgmt. Functions
(Slice – Service Mapper •Resource-, Domain- and Service
Orchestration, Service Information Mgmt., Network
Capability Discovery)
Network Clouds
Applications and Business
Services
Fixed and Satellite Access Networks Aggregation and Core Networks
Mobile Broadband, Services,
IoT Services, ICT Vertical
Industries Services
Application & service programmability,
Primitives: catalogues, monitoring, Tools:
data analysis, testing and packaging
Radio Access Network
Common
Control &
Enforcement
Converged
Data
Common
Control &
Enforcement
Converged
Data
Common
Control &
Enforcement
Converged
Data
Common
Control &
Enforcement
Converged
Data
Converged
Data
Common
Control &
Enforcement
Infrastructure
Softwarization and
Processes
(Software and service networks provision,
Apps-driven network softwarization,
control, mgmt. and service planes, Network
capability exposure, Optimization of costs
and processes)
(Virtual)
Network Functions
Converged DataConverged Data
Common Control
& Enforcement
Infrastructure Control of (Virtual)
Network Functions
(Network softwarization, Cloud, Orchestration
Mobility control, Mobile edge Computing)
5G Programmable Architecture
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
11
Smart Network Planes - Scope and Functionality (I)Application and Business Service Plane – It defines and implements the business processes of
the services along specific value chains.
• A service in the 5G context is a piece of software that performs one or more functions,
provides one or more APIs to applications or other services of the same or different planes
to make usage of those functions, and returns one or more results.
• Services can be combined with other services, or called in a serialized manner to create a
new service.
• An application in the 5G context is a piece of software that utilizes the underlying services to
perform a function.
• Application operation can be parameterized, for example, by passing certain arguments at
call time, but it is meant to be a standalone piece of software; an App does not offer any
interfaces to other applications or services.
Integrated Network Management & Operations Plane -It enables the creation, deactivation,
operation, control and coordination (orchestration) of
• Dedicated management functions operating on top of a 5G E2E smart infrastructure;
• The collection of resources required for managing the overall operation and coordination of
individual network devices.
• It guarantees the creation the dynamic, configurable, resilient, cost effective software
networks
It further includes E2E Network segments management, FCAPS functionality, Monitoring
operations, Network Information Management, In-network data and operations processing and
Multi domains management operations.
5G Planes
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
12
Smart Network Planes - Scope and Functionality (II)Multi-Service Orchestration and Management Plane – The functions and interfaces in this plane are
used to set up and manage groups of network instances and/or nodes.
• More specifically, the setup consists of creating/installing/arranging/deactivation/coordinating NFs
and interfaces according to the available physical and virtual resources.
• It also comprises the set of functions associated with the network operations, such as fault
management, performance management and configuration management.
• It further includes Slice – Service Mapper functions, Resources, Domain and Service Orchestration
functions, Service Information Management functions and Network Capability Discovery functions.
• It also includes the lifecycle management of individual network functions and mobile network
instances as a whole. In current mobile networks, this role is often performed by the Operations
Support System (OSS). The idea is to enable the creation, operation, and control of multiple
dedicated communication service networks running on top of a 5G E2E infrastructure.
Control Plane - The collection of functions responsible for controlling one or more network functions.
• Control Plane instructs network devices, network elements, and network functions with respect to
processing elementary data units (packets, frames, symbols, bits, etc.) of the user/data/forwarding
plane.
• The control of (virtual) network functions include Control of Network (Virtual) functions, Control of
Orchestration functions, Control of Mobility functions, Cloud Control functions, Mobile Edge
Computing Control functions and adaptors to different enforcement functions.
• The control of (virtual) network functions is generally 5G-applicable, and they are separated from
the control and enforcements functions which are network segment-specific. The control plane
interacts primarily with the forwarding plane and, to a lesser extent, with the management plane.
Forwarding Plane / Data Plane - The collection of resources across all network devices responsible for
forwarding traffic.
5G Planes
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
13
Smart Network Planes - Scope and Functionality (V)
Infrastructure Softwarization Plane – Enables the provisioning and operation of software
and service networks. It facilitates the operation of end-to-end heterogeneous networking
and distributed cloud platforms, including physical and logical resources and devices. It
includes functions for designing, implementing, deploying, managing and maintaining
network equipment, network components and/or network services by programming. It
further includes functions for the provision of software and service networks, application
driven network softwarization, programmability of Software Networks, dynamic deployment
of new network and management services (i.e. which could be executed in data, control,
management, service plane), network capability exposure, and E2E slice provisioning. It
includes functions for dynamic programmability of
(1) network devices;
(2) network (virtual) functions;
(3) network slices,
(4) network services and applications;
(5) Data, control, management planes.
The software utilize features such as flexibility and rapidity all along the lifecycle of network
equipment/components/services, in order to create conditions that enable the re-design of
network and services architectures, optimize costs and processes, allow self-management
and bring added value to network infrastructures.
5G Planes
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Local DCsWireless
VirtualizationPHY Functions
Regional DCsOptical Metro Remote DCsOptical Core
VirtualizationPHY Functions VirtualizationPHY Functions
PHY
Inf
Virtual
Resources
Virtual
Resources
Virtual
Resources
PHY
Resources
PHY
Resources
PHY
Resources
PNF VNFPNF VNF VNF VNF
Virtual
Transport
forwarding
vBBU
(lower layers)
vBBU
(upper layers)
End point
End point
forwarding
forwarding
Operational Network Services
End-user services
RFtoBaseband
CyclePrefix&FFT
Resource
demapping
Receive
processing
Decoding
MAC
ServiceManagement&
Orchestration
Inf.Management&
Control
Local DCs Remote/regional DC
5G Programmable Hardware
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Content
5G Networking
5G Functional Description and Programmability
5G Management & Security
5G Network Slicing
Concluding Remarks & Acknowledgement
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Infrastructure AdaptorInfrastructure Adaptor
VIM
Physical
Infrastructure
WIM WIM
Physical Resources
Compute, Storage, Connectivity Resources
Logical – Virtual Resources
Compute, Storage, Connectivity Resources
Slices - Grouping of Resources with Management I/Fs
Compute, Storage, Connectivity Resources
WIM WIMVirtual Infrastructure
Managers
VNF1
Gatekeeper
Management Information
Infrastructure Adaptor
Infrastructure Abstraction
and Capability Discovery
Cognitive and Autonomic Orchestration
Software
Development
Processes and Toolkit
(SDK)
Service Deployment and OperationDevelopment
Service
developer/
operator
Logical
Infrastructure
Orchestratio
nFunctionN
Software
Network
Functions
VNF2 VNF3 VNF n
Network
Services
Management
Multi Service Platform
Orchestratio
nFunction2
Orchestration
Function1
Autonomic&Cognitive
ServiceManagement
• Multi /Intra
Domain Level
• Service Level
• Infrastructure Level
• Resource Level
Federation
Management
Federation
Management
E2E Service
Inventory
E2E Service
Inventory
Service
Operations
Service
Operations
Infrastructure
Identities
Infrastructure
Identities
Infrastructure
Monitoring
Infrastructure
Monitoring
Slice Life Cycle
Management
Slice Life Cycle
Management
Performance
Management
Performance
Management
Passive & Active
Resources
Passive & Active
Resources
Service
Performance
Service
Performance
Service
Self- Care
Service
Self- Care
Fault
Management
Fault
Management
Service
Programmability
Service
Programmability
Configuration
Management
Configuration
Management
Orchestratio
nFunctionN
Orchestratio
nFunction2
Orchestration
FunctionN+1
Orchestratio
nFunctionN
Orchestratio
nFunction2
Orchestration
FunctionM+1
Integrated Management and Operation
User Rights
Management
User Rights
Management
Autonomic&CognitiveInfrastructure
ManagementandOperations
RAN
RAN
VNF Core
VNF
RAN
VNF
Core
VNF
Access
VNF
Access
Node
Access
VNF
Access
VNF
Access
VNF Edge or Core
Data Center /
Mobile clouds
IoT low
Power
Radio
5G
Radio
Other
Radio
Fixed and Satellite Access Nodes Fixed and Satellite Access NodesCore
Infrastructure Capability Services & Infrastructure Information Service & Virtual Services
5G Management and Orchestration
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Infrastructure
programmability
Application nApplication n
HealthHealth
Robotic communicationRobotic communication
MediaMedia
MBB BasicMBB Basic
API
API
API
Resource slices
API
Service slices
API
API
API
API
E2EMulti-domainOrchestration
I1
I3
Sl-Or
I5
Orchestrator
Data Center
Orchestrator
SDN net.
Orchestrator
Optical net.
Orchestrator
Optical net.
Orchestrator
Legacy net.
Orchestrator
Data Center
I2-S
I2-R
Orchestrator
SDN net.
Resource Domains
API
API
API
API
API
E2E Multi-Domain
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Compound
domains
2
Management
domain
Management domain(s)
IP Domain
2
IP domain
TA
Management domain(s)
Other UE
domains
Management
domain
Core network
domain
Access network
domain
Operator network domain
User equipment domain
Transport
domain
3P domain
USIM domain ME domain Access domain
RAT 1
Serving domain
Home domain
Access domain
RAT 2
IM domain
IPS domain
SD
SD
SD
SD
SD
SD
IP domain
Tenant
domains
infrastructure
domains
MEHW domainUICC domain
IP domain
TA
IP domain
TA
TATA
TA
IP domain IP Domain
External network
domain
Network domain
SD
IP domain
TA
Slice
Domain(s)
SD
SD
TA Trust Anchor(s)
Optional
SD
TA
SD
5G Security Domains
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Content
5G Networking
5G Functional Description and Programmability
5G Management & Security
5G Network Slicing
Concluding Remarks & Acknowledgement
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Definitions of Network Slicing & References (I)
I - Slicing Resources:
Active / Programmable Networks research: node operating systems & resource control frameworks (1995 -2005)
(*)
Federated Testbed research : Planet Lab USA (2002), PlanetLab EU (2005), OneLab EU (2007), PlanetLab Japan
(2005), OpenLab EU ( 2012)
GENI Slice (2008): “GENI is a shared network testbed i.e. multiple experimenters may be running multiple
experiments at the same time. A GENI slice is:
• The unit of isolation for experiments.
• A container for resources used in an experiment. GENI experimenters add GENI resources (compute
resources, network links, etc.) to slices and run experiments that use these resources.
• A unit of access control. The experimenter that creates a slice can determine which project members have
access to the slice i.e. are members of the slice.
(*) Galis, A., Denazis, S., Brou, C., Klein, C. (ed) –”Programmable Networks for IP Service Deployment” ISBN 1-58053-745-6, pp 450, June 2004, Artech House
Books, http://www.artechhouse.com/International/Books/Programmable-Networks-for-IP-Service-Deployment-1017.aspx
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Definitions of Network Slicing & References(II)
ITU-T Slicing (2011) as defined in [ITU-T Y.3011], [ITUTY.3012] is the basic concept of the Network Softwarization. Slicing
allows logically isolated network partitions (LINP) with a slice being considered as a unit of programmable resources such
as network, computation and storage.
I - Slicing Resources:
Slice capabilities (2009) “Management and Service-aware Networking Architectures (MANA) for Future Internet” – A. Galis
et all - Invited paper IEEE 2009 Fourth International Conference on Communications and Networking in China (ChinaCom09)
26-28 August 2009, Xi'an, China, http://www.chinacom.org/2009/index.html
3 Slices Capabilities
– “Resource allocation to virtual infrastructures or slices of virtual infrastructure.”
– “Dynamic creation and management of virtual infrastructures/slices of virtual infrastructure across diverse
resources.”
– “Dynamic mapping and deployment of a service on a virtual infrastructure/slices of virtual infrastructure.”
17 Orchestration capabilities
19 Self-functionality mechanisms
14 Self-functionality infrastructure capabilities
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Definitions of Network Slicing & References(III)
II- Network Slicing :
NGMN Slice capabilities (2016) - consist of 3 layers: 1) Service Instance Layer, 2) Network Slice Instance Layer, and 3)
Resource layer.
• The Service Instance Layer represents the services (end-user service or business services) which are to be supported.
Each service is represented by a Service Instance. Typically services can be provided by the network operator or by 3rd
parties.
• A Network Slice Instance provides the network characteristics which are required by a Service Instance. A Network Slice
Instance may also be shared across multiple Service Instances provided by the network operator.
• The Network Slice Instance may be composed by none, one or more Sub-network Instances, which may be shared by
another Network Slice Instance.
3GPP SA2 23.799 Study Item “Network Slicing’ 2016 ; SA5 TR 28.801Study Item “Network Slicing 2017
ONF Recommendation TR-526 “Applying SDN architecture to Network Slicing” 2016
IETF Draft draft-gdmb-netslices-intro-and-ps-02 2016- 2017
EU 5GPPP
• 15 Large Scale Research projects – all based on Network Slicing (https://5g-ppp.eu) (2015- 2018+)
• White Paper on 5G Architecture centered on network slicing (https://5g-ppp.eu/wp-
content/uploads/2014/02/5G-PPP-5G-Architecture-WP-July-2016.pdf) (2016)
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
(Proposal) Unified Slice definitionSlice as a union of subsets of resources & NFVs at a given time
(1) The Service Instance component
– represents the end-user service or business services.
– an instance of an end-user service or a business service that is realized within or by a NS.
– would be provided by the network operator or by 3rd parties.
(2) A Network Slice Instance component
– represented by a set of network functions, and resources
– forms a complete instantiated logical network to meet certain network characteristics required
by the Service Instance(s).
– provides network characteristics which are required by a Service Instance.
– may also be shared across multiple Service Instances
(3) Resources component – it includes: Physical, Logical & Virtual resources
– Physical & Logical resources - An independently manageable partition of a physical resource,
which inherits the same characteristics as the physical resource and whose capability is bound to
the capability of the physical resource. It is dedicated to a Network Function or shared between
a set of Network Functions;
– Virtual resources - An abstraction of a physical or logical resource, which may have different
characteristics from that resource, and whose capability may not be bound to the capability of
that resource.
(4) Slice Capability exposure component
– allow 3rd parties to access via APIs information regarding services provided by the slice (e.g.
connectivity information, QoS, mobility, autonomicity, etc.)
– allow to dynamically customize the network characteristics for different diverse use cases within
the limits set of functions by the operator.
– it includes a description of the structure (and contained components) and configuration of the
slice instance.
Definitions of Network Slicing & References(III)
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Network Slice Usage Scenarios
• Mission-critical Ultra low latency communication
• Massive-connectivity machine communication (e.g. Smart
metering, Smart grid and sensor networks)
• Extreme QoS
• Independent QoS isolation design
• Independent operations and management
• Independent autonomic management functionality
• Independent cost and/or energy optimisation
• Independent multi-topology routing
• Sharing Infrastructure: Enablers for sharing infrastructure safely
and efficiently (Multi-tenant)
NS Scenarios
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Network Slice Representation
Forwarding Network
Element
Network Slice 1
Tenant A
Control
Infrastructure
Tenant B Control
Infrastructure
Network Slice 2
NF Network Function /
Virtual NF
NF1
NF2
NF4
NF3
Network Service
Tenant A
NF1
NF2
NF4
NF3
Network Service
Tenant B
Physical Network
EInfrastructure
NS Representation
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Network slice-specific (dedicated) control layer functionsNetwork slice-specific (dedicated) control layer functionsNetwork slice-specific (dedicated) control layer functions
Network slice-specific (dedicated) management layer functions
Slice MangerSlice Manger
Management&Orchestration
plane
E2E Service Management & Orchestration
EM
EM
Control
plane
Data
plane
Network slice-specific (dedicated) data layer functions
NFV
Orchestrator
VNF
Manager VIM
Revisited ETSI NFV Framework
VNF
VNF
VNF
VNF
VNF
VNF
VNF
VNF
VNF
VNF
VNF
VNF
VIM
VNF
Manager
Slice Manger
OSS/NM
Slice as a union of
subsets of
resources & NFVs
Opportunity to integrate Network Slice across almost all the layers in NFV architecture
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Management&Orchestration
plane
E2E Service Management & Orchestration
Service
plane
BSS & Policies decision
Applications & Services
EM
OSS/NM
EM
Control
plane
Shared control layer functions
Data
plane
Network slice-specific (dedicated) control layer functions
Network slice-specific (dedicated) control layer functions
VNF
VNF
VNF VNF
PNF
PNF
PNF
Shared data layer functions
PNF VNF
PNF
Programmable Controller
VNF
VNF VNFVNF
NFV Orchestrator
VNF
Manager
VIM
5G Networking
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Network Slice Life Cycle Management
Instantiation
Management Plane
Network (Virtual) Functions
Resource (Physical and Virtual)
Slice Networking
Orchestration
Network
Infrastructure
Service Plane
Control Plane
Data Plane
Embedded
Softwarization
Control Plane
Data Plane
Service Plane
M
G
M
T
Instances (Service, Management, Control, and Data planes)
Orchestration
Slice
Networking
Control Plane
Data Plane
Service Plane
M
G
M
T
Orchestration
Slice
Networking
Control Plane
Data Plane
Service Plane
M
G
M
T
Orchestration
Slice
Networking
Control Plane
Data Plane
Service Plane
M
G
M
T
Orchestration
Slice
Networking
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
NS Management & Operations
(1) Uniform Reference NFV Model for Network Slicing (Architecture document): Describes all of the functional
elements and instances of a network slice in NFV. Describes shared non-sliced network parts. Establishes the
boundaries to the basic network slice operations
(2) Review common scenarios / Use Cases from the requirements for operations and interactions point of view.
Describes the roles (owner, operator, user) which are played by entities with single /multiple entities playing
different roles.
(3) Network Slice capabilities in NFV environment :
– Enablers for safe, secure and efficient multi-tenancy in slices.
– Methods to guarantee/manage for the end-to-end QoS of service in a slice.
– Recursion: methods for NS segmentation allowing a slicing hierarchy with parent - child relationships.
– Optimisation: Mapping algorithms & methods for network resources automatic selection for NS ; global resource
view formed; global energy view formed; Network Slice deployed based on global resource and energy efficiency.
– Monitoring status and behaviour of NS in a single and/or muti-domain NFV environment.
5) Network slice operations in an NFV environment:
• Slice life cycle management including creation, activation / deactivation, protection, elasticity, extensibility, safety,
sizing and scalability of the slicing model per network and per network clouds.
• Slice management and operation: namely configuration, composition, monitoring, optimisation, elasticity are
carried as part of the slice protocols.
• E2E Slice stitching / composition in an NFV environment: having enablers and methods for efficient stitching
/composition/ decomposition of slices:
– vertically (service + management + control planes) and/or
– horizontally (between different domains part of access, core, edge segments) and /or
– vertically + horizontally.
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
NS Key Characteristics - No1 Engineering Priority in 5G
“The service cannot provide optimal experience on a best-effort network”; “It is
inefficient and expensive to build a separate infrastructure for each service”
• NS is mainly an in-band management concept in support of a service which is
coordinating/orchestrating network functions and resources at a given time.
• NS is a dedicated network that is build on an infrastructure mainly composed of, but
not limited to, connectivity, storage and computing. Network slices are concurrently
deployed as multiple logical, self-contained and independent, partitioned network
functions and resources on a common physical infrastructure in order to support well
at least one service.
• NS has the ability to dynamically expose and possibly negotiate the parameters that
characterize an network slice. Network slices are configurable and programmable.
• NS has its own operator that sees it as a complete network infrastructure and to use
part of the network resources to meet stringent resource requirements.
• NS is supporting tenant(s) that are strongly independent on infrastructure.
• NS is introducing an additional layer of abstraction by the creation of logically or
physically isolated groups of network resources and network function/virtual network
functions configurations separating its behavior from the underlying physical network
• NS is dynamically and non-disruptively reprovisioned.
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Content
5G Networking
5G Functional Description and Programmability
5G Management & Security
5G Network Slicing
Concluding Remarks & Acknowledgement
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
CORE
FIXED
ACCESS
Smart Cloud &
Network Fabric
Enabled by
Programmability
Including SDN
Service Adapted
Network Slices
Enabled by
Network Function
Virtualization (NFV)
E2N Multi-Domain Orchestration
E2D coordination, conflict resolution, multi-domain information exchange
RADIO
ACCESS
Dedicated ICT Service Network
Slice
Enterprise/ Vertical Business
Network Slice
Mobility Network Slice
EDGE
EDGE
EDGE
EDGE
EDGE
Smart Network Fabric: E2E Multi-Domain Network Operating System Facilities
Network Abstraction, Allocate (virtual) network resources, Maintain network state, Ensure network Reliability in a
multi domain environment
In-band Cognitive
Management
METRO
EDGE
• Dynamically adapting the network to meet future demands requires
• Creating the dynamic, configurable, resilient, cost effective network
• A programmable network operating system with simple interface to the network ( smart network fabric)
• Transition from network devises to network functions and virtual network functions with inbound management
5G Architecture – Concluding Remarks
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Access Transport Core Network
Applications, Services, Management, Orchestration & Control, Softwarization
• Slice support (slice awareness)
• Control/user plane split
• NFV support (possibly limited)
• C-RAN/D-RAN functional splits
•Tight Interworking of LTE and new
radio interfaces for the 5G RAN
• Multi-connectivity
• Enhanced/new network access
functions
•CN/RAN split
•New RAT for higher frequencies up to
100 GHz (e.g., access, handovers etc)
•Support for mm-wave standalone and
non-standalone operation
• PHY numerology (TTI, waveform,
coding, etc)
•Security as a service
• Slice support
•SDN support and full
exploitation of NFV
•Control and user plane split
•Fixed Mobile Convergence
•CN/RAN split
•Security as a service
• Slice support (configuration mode selection, adaptation)
•Decomposition and reutilization of functional blocks
•Flexible placement of virtual network functions
•Deployment and management of cloud facilities resources
•Muti-Domain Orchestration and Life Cycle Management
•Network programmability for multi-domain control management and
orchestration
•Security as a service
•Multi- tenancy support
•Open access
•Fixed-Mobile Convergence
•Slice support
•SDN & NFV support
•Heterogeneous fixed and wireless
access technologies
•Flexible optical transport in the
metro domain
•Compute and storage hardware
available in aggregation nodes
•Central, regional and edge
clouds, cloudlets
•Functional splits can vary from D-
RAN to C-RAN
•Control and user plane split
•New fronthaul
•Security as a service
Mobile Edge
Computing,
Edge Networks
• Slice support
• Security as a service
• Service support and
programmability
• Virtialization of Network
Functions
Satellite Networks
• Slice support
•Security as a service
• Service support and
programmability
• Closed control loops
• Self Management of Network (Virtual) functions
• Virtualization of Network Functions
• Service and Network Programmability
• Hosting services executions in one (or more) Slices
• Enforce required capability/capacity/security/elasticity/ adaptability/ flexibility “where
and when needed
• Supporting on demand composition of network functions and network capabilities
• Network OS facilities
5G Networking – Summary
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Thank You
5G PPP Infrastructure Association
• 5G PPP 5G Architecture White Paper ( July 2016, August 2017)
• 5G-PPP Cognitive Network Management for 5G White Paper (March 2017)
• https://5g-ppp.eu/white-papers/
5GPPP EU Research Projects
• 5GEx – “5G Multi-Domain Exchange” https://5g-ppp.eu/5gex/
• 5G SONATA – “Service Programming and Orchestration for Virtualized
Software Networks in 5G” https://5gppp.eu/sonata/.
Acknowledgement
IMT-2020/5G workshop and demo day – 11th July 2017, Geneva
Thank You
“Ability will never catch up with the demand for it.”
Confucius

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5G Architecture Viewpoints H2020 5G PPP Infrastructure Association

  • 1. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva 5G Architecture Viewpoints H2020 5G PPP Infrastructure Association 5G PPP 5G Architecture White Paper ( July 2016, August 2017) 5G-PPP Cognitive Network Management for 5G White Paper (March 2017) https://5g-ppp.eu/white-papers/ Prof. Alex Galis http://www.ee.ucl.ac.uk/~agalis/ a.galis@ucl.ac.uk Communications and Information Systems Group Department of Electronic & Electrical Engineering University College London, Torrington Place, London WC1E 7JE, United Kingdom
  • 2. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Content 5G Networking 5G Functional Description and Programmability 5G Management & Security 5G Network Slicing Concluding Remarks & Acknowledgement
  • 3. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Arpanet Rough sketch by Larry Roberts ARPAnet Plan – late 1960s – Early TestBeds
  • 4. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva 5G Networking 5G Networking is driven by • an evolution in terms of higher capacity, performance and spectrum access in radio network segments; and • an evolution of native higher flexibility and programmability conversion in all non-radio 5G network segments: Fronthaul and Backhaul Networks, Access Networks, Aggregation Networks, Core Networks, Mobile Edge Networks, Edge Clouds Software Networks, Software-Defined Cloud Networks, Satellite Networks and IoT Networks.
  • 5. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva 5G Networking 5G Networking is dependent logically and functionally on the followings key separation of concerns: • Serving at best high diversity types of communications (Human & Machines & Devices & Sensors & Edge Systems) with different performance attributes. • Separation of concerns between control/management/softwarization/services • Separation of concerns between logical / physical resources functions (i.e. connectivity, compute and storage resources) and network capabilities • A shift in networking and a transition form “network of entities”, as in current systems, to “network of (virtual) functions / capabilities“. As such “network (virtual) functions” are units of networking. • Network softwarization including network slicing. Hosting services executions in one (or more) Slices. Network softwarization includes functions for programmability of (1) network devices; (2) network (virtual) functions; (3) network slices; (4) network services and applications; (5) data, control, management planes. • Supporting on demand composition of network functions and network capabilities • Leveraging natively Network Softwarization technologies in all network segments and network components.
  • 6. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Network Slicing End user and operational services Integrate Heterogeneous Technologies Integrate Communication and Computation Native Softwarization Physical Resources View Applications and Business Services View Infrastructure Control View
  • 7. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Network Function Layer Orchestrator Business Function Layer Business Service Layer Infrastructure Layer RAN and wireless backhaul Core CloudEdge Cloud Optical Core Network Optical Metro Network Optical and Satellite Access Network Edge Cloud Network Function Repository Vertical #1 Services (e.g., Factory of the Future) Mobile broadband Services Vertical #2 Services (e.g,, Automotive) Service #1 Service #2 Service #3 Service #1 Service #2 Service #3 Service #1 Service #2 Service #3 Vertical #1 Function Repository Vertical #2 Function Repositor y Vertical #3 Function Repositor y OpticalWireless Cloud Northbound interface Operator A Network Function Repository RAN and wireless backhaul Core CloudEdge Cloud Optical Core Network Optical Metro Network Optical and Satellite Access Network Edge Cloud Northbound interface Operator BFrom Server 5G Networking Functional Layers
  • 8. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Wide Area Network Resourc es & Function al Level Wireless and fixed access Edge Cloud Network Level Service Level Core/Ce ntral Cloud Network Operating System Programmable Ctrl E2E Secure Service Orchestrator Slice #1: Automotive / Factory Slice #2: IoT Recursive Model Programmabl e Ctrl (SDN-C) Programmable Ctrl AMF SMF UPF AMF UPF SMF SMF SMF SecureNetworkandServiceManagement 5G Architecture
  • 9. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Content 5G Networking 5G Functional Description and Programmability 5G Management & Security 5G Network Slicing Concluding Remarks & Acknowledgement
  • 10. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Optical Core Network Optical Metro Network Edge Cloud Optical Access Network Front-/Backhaul Network Radios Core Clouds Integrated System Mgmt. and Operations (E2E /Concatenated Network segments, FCAPS functionality, Network Information Management, Multi domains operations, In-network data/operations processing) Multi-Service Mgmt. Functions (Slice – Service Mapper •Resource-, Domain- and Service Orchestration, Service Information Mgmt., Network Capability Discovery) Network Clouds Applications and Business Services Fixed and Satellite Access Networks Aggregation and Core Networks Mobile Broadband, Services, IoT Services, ICT Vertical Industries Services Application & service programmability, Primitives: catalogues, monitoring, Tools: data analysis, testing and packaging Radio Access Network Common Control & Enforcement Converged Data Common Control & Enforcement Converged Data Common Control & Enforcement Converged Data Common Control & Enforcement Converged Data Converged Data Common Control & Enforcement Infrastructure Softwarization and Processes (Software and service networks provision, Apps-driven network softwarization, control, mgmt. and service planes, Network capability exposure, Optimization of costs and processes) (Virtual) Network Functions Converged DataConverged Data Common Control & Enforcement Infrastructure Control of (Virtual) Network Functions (Network softwarization, Cloud, Orchestration Mobility control, Mobile edge Computing) 5G Programmable Architecture
  • 11. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva 11 Smart Network Planes - Scope and Functionality (I)Application and Business Service Plane – It defines and implements the business processes of the services along specific value chains. • A service in the 5G context is a piece of software that performs one or more functions, provides one or more APIs to applications or other services of the same or different planes to make usage of those functions, and returns one or more results. • Services can be combined with other services, or called in a serialized manner to create a new service. • An application in the 5G context is a piece of software that utilizes the underlying services to perform a function. • Application operation can be parameterized, for example, by passing certain arguments at call time, but it is meant to be a standalone piece of software; an App does not offer any interfaces to other applications or services. Integrated Network Management & Operations Plane -It enables the creation, deactivation, operation, control and coordination (orchestration) of • Dedicated management functions operating on top of a 5G E2E smart infrastructure; • The collection of resources required for managing the overall operation and coordination of individual network devices. • It guarantees the creation the dynamic, configurable, resilient, cost effective software networks It further includes E2E Network segments management, FCAPS functionality, Monitoring operations, Network Information Management, In-network data and operations processing and Multi domains management operations. 5G Planes
  • 12. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva 12 Smart Network Planes - Scope and Functionality (II)Multi-Service Orchestration and Management Plane – The functions and interfaces in this plane are used to set up and manage groups of network instances and/or nodes. • More specifically, the setup consists of creating/installing/arranging/deactivation/coordinating NFs and interfaces according to the available physical and virtual resources. • It also comprises the set of functions associated with the network operations, such as fault management, performance management and configuration management. • It further includes Slice – Service Mapper functions, Resources, Domain and Service Orchestration functions, Service Information Management functions and Network Capability Discovery functions. • It also includes the lifecycle management of individual network functions and mobile network instances as a whole. In current mobile networks, this role is often performed by the Operations Support System (OSS). The idea is to enable the creation, operation, and control of multiple dedicated communication service networks running on top of a 5G E2E infrastructure. Control Plane - The collection of functions responsible for controlling one or more network functions. • Control Plane instructs network devices, network elements, and network functions with respect to processing elementary data units (packets, frames, symbols, bits, etc.) of the user/data/forwarding plane. • The control of (virtual) network functions include Control of Network (Virtual) functions, Control of Orchestration functions, Control of Mobility functions, Cloud Control functions, Mobile Edge Computing Control functions and adaptors to different enforcement functions. • The control of (virtual) network functions is generally 5G-applicable, and they are separated from the control and enforcements functions which are network segment-specific. The control plane interacts primarily with the forwarding plane and, to a lesser extent, with the management plane. Forwarding Plane / Data Plane - The collection of resources across all network devices responsible for forwarding traffic. 5G Planes
  • 13. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva 13 Smart Network Planes - Scope and Functionality (V) Infrastructure Softwarization Plane – Enables the provisioning and operation of software and service networks. It facilitates the operation of end-to-end heterogeneous networking and distributed cloud platforms, including physical and logical resources and devices. It includes functions for designing, implementing, deploying, managing and maintaining network equipment, network components and/or network services by programming. It further includes functions for the provision of software and service networks, application driven network softwarization, programmability of Software Networks, dynamic deployment of new network and management services (i.e. which could be executed in data, control, management, service plane), network capability exposure, and E2E slice provisioning. It includes functions for dynamic programmability of (1) network devices; (2) network (virtual) functions; (3) network slices, (4) network services and applications; (5) Data, control, management planes. The software utilize features such as flexibility and rapidity all along the lifecycle of network equipment/components/services, in order to create conditions that enable the re-design of network and services architectures, optimize costs and processes, allow self-management and bring added value to network infrastructures. 5G Planes
  • 14. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Local DCsWireless VirtualizationPHY Functions Regional DCsOptical Metro Remote DCsOptical Core VirtualizationPHY Functions VirtualizationPHY Functions PHY Inf Virtual Resources Virtual Resources Virtual Resources PHY Resources PHY Resources PHY Resources PNF VNFPNF VNF VNF VNF Virtual Transport forwarding vBBU (lower layers) vBBU (upper layers) End point End point forwarding forwarding Operational Network Services End-user services RFtoBaseband CyclePrefix&FFT Resource demapping Receive processing Decoding MAC ServiceManagement& Orchestration Inf.Management& Control Local DCs Remote/regional DC 5G Programmable Hardware
  • 15. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Content 5G Networking 5G Functional Description and Programmability 5G Management & Security 5G Network Slicing Concluding Remarks & Acknowledgement
  • 16. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Infrastructure AdaptorInfrastructure Adaptor VIM Physical Infrastructure WIM WIM Physical Resources Compute, Storage, Connectivity Resources Logical – Virtual Resources Compute, Storage, Connectivity Resources Slices - Grouping of Resources with Management I/Fs Compute, Storage, Connectivity Resources WIM WIMVirtual Infrastructure Managers VNF1 Gatekeeper Management Information Infrastructure Adaptor Infrastructure Abstraction and Capability Discovery Cognitive and Autonomic Orchestration Software Development Processes and Toolkit (SDK) Service Deployment and OperationDevelopment Service developer/ operator Logical Infrastructure Orchestratio nFunctionN Software Network Functions VNF2 VNF3 VNF n Network Services Management Multi Service Platform Orchestratio nFunction2 Orchestration Function1 Autonomic&Cognitive ServiceManagement • Multi /Intra Domain Level • Service Level • Infrastructure Level • Resource Level Federation Management Federation Management E2E Service Inventory E2E Service Inventory Service Operations Service Operations Infrastructure Identities Infrastructure Identities Infrastructure Monitoring Infrastructure Monitoring Slice Life Cycle Management Slice Life Cycle Management Performance Management Performance Management Passive & Active Resources Passive & Active Resources Service Performance Service Performance Service Self- Care Service Self- Care Fault Management Fault Management Service Programmability Service Programmability Configuration Management Configuration Management Orchestratio nFunctionN Orchestratio nFunction2 Orchestration FunctionN+1 Orchestratio nFunctionN Orchestratio nFunction2 Orchestration FunctionM+1 Integrated Management and Operation User Rights Management User Rights Management Autonomic&CognitiveInfrastructure ManagementandOperations RAN RAN VNF Core VNF RAN VNF Core VNF Access VNF Access Node Access VNF Access VNF Access VNF Edge or Core Data Center / Mobile clouds IoT low Power Radio 5G Radio Other Radio Fixed and Satellite Access Nodes Fixed and Satellite Access NodesCore Infrastructure Capability Services & Infrastructure Information Service & Virtual Services 5G Management and Orchestration
  • 17. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Infrastructure programmability Application nApplication n HealthHealth Robotic communicationRobotic communication MediaMedia MBB BasicMBB Basic API API API Resource slices API Service slices API API API API E2EMulti-domainOrchestration I1 I3 Sl-Or I5 Orchestrator Data Center Orchestrator SDN net. Orchestrator Optical net. Orchestrator Optical net. Orchestrator Legacy net. Orchestrator Data Center I2-S I2-R Orchestrator SDN net. Resource Domains API API API API API E2E Multi-Domain
  • 18. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Compound domains 2 Management domain Management domain(s) IP Domain 2 IP domain TA Management domain(s) Other UE domains Management domain Core network domain Access network domain Operator network domain User equipment domain Transport domain 3P domain USIM domain ME domain Access domain RAT 1 Serving domain Home domain Access domain RAT 2 IM domain IPS domain SD SD SD SD SD SD IP domain Tenant domains infrastructure domains MEHW domainUICC domain IP domain TA IP domain TA TATA TA IP domain IP Domain External network domain Network domain SD IP domain TA Slice Domain(s) SD SD TA Trust Anchor(s) Optional SD TA SD 5G Security Domains
  • 19. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Content 5G Networking 5G Functional Description and Programmability 5G Management & Security 5G Network Slicing Concluding Remarks & Acknowledgement
  • 20. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Definitions of Network Slicing & References (I) I - Slicing Resources: Active / Programmable Networks research: node operating systems & resource control frameworks (1995 -2005) (*) Federated Testbed research : Planet Lab USA (2002), PlanetLab EU (2005), OneLab EU (2007), PlanetLab Japan (2005), OpenLab EU ( 2012) GENI Slice (2008): “GENI is a shared network testbed i.e. multiple experimenters may be running multiple experiments at the same time. A GENI slice is: • The unit of isolation for experiments. • A container for resources used in an experiment. GENI experimenters add GENI resources (compute resources, network links, etc.) to slices and run experiments that use these resources. • A unit of access control. The experimenter that creates a slice can determine which project members have access to the slice i.e. are members of the slice. (*) Galis, A., Denazis, S., Brou, C., Klein, C. (ed) –”Programmable Networks for IP Service Deployment” ISBN 1-58053-745-6, pp 450, June 2004, Artech House Books, http://www.artechhouse.com/International/Books/Programmable-Networks-for-IP-Service-Deployment-1017.aspx
  • 21. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Definitions of Network Slicing & References(II) ITU-T Slicing (2011) as defined in [ITU-T Y.3011], [ITUTY.3012] is the basic concept of the Network Softwarization. Slicing allows logically isolated network partitions (LINP) with a slice being considered as a unit of programmable resources such as network, computation and storage. I - Slicing Resources: Slice capabilities (2009) “Management and Service-aware Networking Architectures (MANA) for Future Internet” – A. Galis et all - Invited paper IEEE 2009 Fourth International Conference on Communications and Networking in China (ChinaCom09) 26-28 August 2009, Xi'an, China, http://www.chinacom.org/2009/index.html 3 Slices Capabilities – “Resource allocation to virtual infrastructures or slices of virtual infrastructure.” – “Dynamic creation and management of virtual infrastructures/slices of virtual infrastructure across diverse resources.” – “Dynamic mapping and deployment of a service on a virtual infrastructure/slices of virtual infrastructure.” 17 Orchestration capabilities 19 Self-functionality mechanisms 14 Self-functionality infrastructure capabilities
  • 22. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Definitions of Network Slicing & References(III) II- Network Slicing : NGMN Slice capabilities (2016) - consist of 3 layers: 1) Service Instance Layer, 2) Network Slice Instance Layer, and 3) Resource layer. • The Service Instance Layer represents the services (end-user service or business services) which are to be supported. Each service is represented by a Service Instance. Typically services can be provided by the network operator or by 3rd parties. • A Network Slice Instance provides the network characteristics which are required by a Service Instance. A Network Slice Instance may also be shared across multiple Service Instances provided by the network operator. • The Network Slice Instance may be composed by none, one or more Sub-network Instances, which may be shared by another Network Slice Instance. 3GPP SA2 23.799 Study Item “Network Slicing’ 2016 ; SA5 TR 28.801Study Item “Network Slicing 2017 ONF Recommendation TR-526 “Applying SDN architecture to Network Slicing” 2016 IETF Draft draft-gdmb-netslices-intro-and-ps-02 2016- 2017 EU 5GPPP • 15 Large Scale Research projects – all based on Network Slicing (https://5g-ppp.eu) (2015- 2018+) • White Paper on 5G Architecture centered on network slicing (https://5g-ppp.eu/wp- content/uploads/2014/02/5G-PPP-5G-Architecture-WP-July-2016.pdf) (2016)
  • 23. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva (Proposal) Unified Slice definitionSlice as a union of subsets of resources & NFVs at a given time (1) The Service Instance component – represents the end-user service or business services. – an instance of an end-user service or a business service that is realized within or by a NS. – would be provided by the network operator or by 3rd parties. (2) A Network Slice Instance component – represented by a set of network functions, and resources – forms a complete instantiated logical network to meet certain network characteristics required by the Service Instance(s). – provides network characteristics which are required by a Service Instance. – may also be shared across multiple Service Instances (3) Resources component – it includes: Physical, Logical & Virtual resources – Physical & Logical resources - An independently manageable partition of a physical resource, which inherits the same characteristics as the physical resource and whose capability is bound to the capability of the physical resource. It is dedicated to a Network Function or shared between a set of Network Functions; – Virtual resources - An abstraction of a physical or logical resource, which may have different characteristics from that resource, and whose capability may not be bound to the capability of that resource. (4) Slice Capability exposure component – allow 3rd parties to access via APIs information regarding services provided by the slice (e.g. connectivity information, QoS, mobility, autonomicity, etc.) – allow to dynamically customize the network characteristics for different diverse use cases within the limits set of functions by the operator. – it includes a description of the structure (and contained components) and configuration of the slice instance. Definitions of Network Slicing & References(III)
  • 24. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Network Slice Usage Scenarios • Mission-critical Ultra low latency communication • Massive-connectivity machine communication (e.g. Smart metering, Smart grid and sensor networks) • Extreme QoS • Independent QoS isolation design • Independent operations and management • Independent autonomic management functionality • Independent cost and/or energy optimisation • Independent multi-topology routing • Sharing Infrastructure: Enablers for sharing infrastructure safely and efficiently (Multi-tenant) NS Scenarios
  • 25. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Network Slice Representation Forwarding Network Element Network Slice 1 Tenant A Control Infrastructure Tenant B Control Infrastructure Network Slice 2 NF Network Function / Virtual NF NF1 NF2 NF4 NF3 Network Service Tenant A NF1 NF2 NF4 NF3 Network Service Tenant B Physical Network EInfrastructure NS Representation
  • 26. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Network slice-specific (dedicated) control layer functionsNetwork slice-specific (dedicated) control layer functionsNetwork slice-specific (dedicated) control layer functions Network slice-specific (dedicated) management layer functions Slice MangerSlice Manger Management&Orchestration plane E2E Service Management & Orchestration EM EM Control plane Data plane Network slice-specific (dedicated) data layer functions NFV Orchestrator VNF Manager VIM Revisited ETSI NFV Framework VNF VNF VNF VNF VNF VNF VNF VNF VNF VNF VNF VNF VIM VNF Manager Slice Manger OSS/NM Slice as a union of subsets of resources & NFVs Opportunity to integrate Network Slice across almost all the layers in NFV architecture
  • 27. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Management&Orchestration plane E2E Service Management & Orchestration Service plane BSS & Policies decision Applications & Services EM OSS/NM EM Control plane Shared control layer functions Data plane Network slice-specific (dedicated) control layer functions Network slice-specific (dedicated) control layer functions VNF VNF VNF VNF PNF PNF PNF Shared data layer functions PNF VNF PNF Programmable Controller VNF VNF VNFVNF NFV Orchestrator VNF Manager VIM 5G Networking
  • 28. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Network Slice Life Cycle Management Instantiation Management Plane Network (Virtual) Functions Resource (Physical and Virtual) Slice Networking Orchestration Network Infrastructure Service Plane Control Plane Data Plane Embedded Softwarization Control Plane Data Plane Service Plane M G M T Instances (Service, Management, Control, and Data planes) Orchestration Slice Networking Control Plane Data Plane Service Plane M G M T Orchestration Slice Networking Control Plane Data Plane Service Plane M G M T Orchestration Slice Networking Control Plane Data Plane Service Plane M G M T Orchestration Slice Networking
  • 29. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva NS Management & Operations (1) Uniform Reference NFV Model for Network Slicing (Architecture document): Describes all of the functional elements and instances of a network slice in NFV. Describes shared non-sliced network parts. Establishes the boundaries to the basic network slice operations (2) Review common scenarios / Use Cases from the requirements for operations and interactions point of view. Describes the roles (owner, operator, user) which are played by entities with single /multiple entities playing different roles. (3) Network Slice capabilities in NFV environment : – Enablers for safe, secure and efficient multi-tenancy in slices. – Methods to guarantee/manage for the end-to-end QoS of service in a slice. – Recursion: methods for NS segmentation allowing a slicing hierarchy with parent - child relationships. – Optimisation: Mapping algorithms & methods for network resources automatic selection for NS ; global resource view formed; global energy view formed; Network Slice deployed based on global resource and energy efficiency. – Monitoring status and behaviour of NS in a single and/or muti-domain NFV environment. 5) Network slice operations in an NFV environment: • Slice life cycle management including creation, activation / deactivation, protection, elasticity, extensibility, safety, sizing and scalability of the slicing model per network and per network clouds. • Slice management and operation: namely configuration, composition, monitoring, optimisation, elasticity are carried as part of the slice protocols. • E2E Slice stitching / composition in an NFV environment: having enablers and methods for efficient stitching /composition/ decomposition of slices: – vertically (service + management + control planes) and/or – horizontally (between different domains part of access, core, edge segments) and /or – vertically + horizontally.
  • 30. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva NS Key Characteristics - No1 Engineering Priority in 5G “The service cannot provide optimal experience on a best-effort network”; “It is inefficient and expensive to build a separate infrastructure for each service” • NS is mainly an in-band management concept in support of a service which is coordinating/orchestrating network functions and resources at a given time. • NS is a dedicated network that is build on an infrastructure mainly composed of, but not limited to, connectivity, storage and computing. Network slices are concurrently deployed as multiple logical, self-contained and independent, partitioned network functions and resources on a common physical infrastructure in order to support well at least one service. • NS has the ability to dynamically expose and possibly negotiate the parameters that characterize an network slice. Network slices are configurable and programmable. • NS has its own operator that sees it as a complete network infrastructure and to use part of the network resources to meet stringent resource requirements. • NS is supporting tenant(s) that are strongly independent on infrastructure. • NS is introducing an additional layer of abstraction by the creation of logically or physically isolated groups of network resources and network function/virtual network functions configurations separating its behavior from the underlying physical network • NS is dynamically and non-disruptively reprovisioned.
  • 31. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Content 5G Networking 5G Functional Description and Programmability 5G Management & Security 5G Network Slicing Concluding Remarks & Acknowledgement
  • 32. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva CORE FIXED ACCESS Smart Cloud & Network Fabric Enabled by Programmability Including SDN Service Adapted Network Slices Enabled by Network Function Virtualization (NFV) E2N Multi-Domain Orchestration E2D coordination, conflict resolution, multi-domain information exchange RADIO ACCESS Dedicated ICT Service Network Slice Enterprise/ Vertical Business Network Slice Mobility Network Slice EDGE EDGE EDGE EDGE EDGE Smart Network Fabric: E2E Multi-Domain Network Operating System Facilities Network Abstraction, Allocate (virtual) network resources, Maintain network state, Ensure network Reliability in a multi domain environment In-band Cognitive Management METRO EDGE • Dynamically adapting the network to meet future demands requires • Creating the dynamic, configurable, resilient, cost effective network • A programmable network operating system with simple interface to the network ( smart network fabric) • Transition from network devises to network functions and virtual network functions with inbound management 5G Architecture – Concluding Remarks
  • 33. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Access Transport Core Network Applications, Services, Management, Orchestration & Control, Softwarization • Slice support (slice awareness) • Control/user plane split • NFV support (possibly limited) • C-RAN/D-RAN functional splits •Tight Interworking of LTE and new radio interfaces for the 5G RAN • Multi-connectivity • Enhanced/new network access functions •CN/RAN split •New RAT for higher frequencies up to 100 GHz (e.g., access, handovers etc) •Support for mm-wave standalone and non-standalone operation • PHY numerology (TTI, waveform, coding, etc) •Security as a service • Slice support •SDN support and full exploitation of NFV •Control and user plane split •Fixed Mobile Convergence •CN/RAN split •Security as a service • Slice support (configuration mode selection, adaptation) •Decomposition and reutilization of functional blocks •Flexible placement of virtual network functions •Deployment and management of cloud facilities resources •Muti-Domain Orchestration and Life Cycle Management •Network programmability for multi-domain control management and orchestration •Security as a service •Multi- tenancy support •Open access •Fixed-Mobile Convergence •Slice support •SDN & NFV support •Heterogeneous fixed and wireless access technologies •Flexible optical transport in the metro domain •Compute and storage hardware available in aggregation nodes •Central, regional and edge clouds, cloudlets •Functional splits can vary from D- RAN to C-RAN •Control and user plane split •New fronthaul •Security as a service Mobile Edge Computing, Edge Networks • Slice support • Security as a service • Service support and programmability • Virtialization of Network Functions Satellite Networks • Slice support •Security as a service • Service support and programmability • Closed control loops • Self Management of Network (Virtual) functions • Virtualization of Network Functions • Service and Network Programmability • Hosting services executions in one (or more) Slices • Enforce required capability/capacity/security/elasticity/ adaptability/ flexibility “where and when needed • Supporting on demand composition of network functions and network capabilities • Network OS facilities 5G Networking – Summary
  • 34. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Thank You 5G PPP Infrastructure Association • 5G PPP 5G Architecture White Paper ( July 2016, August 2017) • 5G-PPP Cognitive Network Management for 5G White Paper (March 2017) • https://5g-ppp.eu/white-papers/ 5GPPP EU Research Projects • 5GEx – “5G Multi-Domain Exchange” https://5g-ppp.eu/5gex/ • 5G SONATA – “Service Programming and Orchestration for Virtualized Software Networks in 5G” https://5gppp.eu/sonata/. Acknowledgement
  • 35. IMT-2020/5G workshop and demo day – 11th July 2017, Geneva Thank You “Ability will never catch up with the demand for it.” Confucius