Network Transformation in the All-IP scenario challenges ... · Network Transformation in the...

Network Transformation in the All-IP scenariochallenges for NFV/SDN promises

Technology – Global Advisory – Next Generation NetDaniele Roffinella

GRUPPO TELECOM ITALIATM Forum – Nice, may 2016

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NFV/SDN promises…NFV/SDN is not the “target”… … NFV/SDN is (would be) a way to reach the target

2015


We have to transform the net……because everything is changing out there !

All Applications & Services are becoming «IP-based»

The IP Traffic constantly grows… 23% CAGR 2104-2019Cisco VNI Global IP Traffic Forecast

…and most of the IP traffic will be video 80% to 90% of global consumer traffic by 2018Cisco “The Zettabyte Era”

the value of the Internet and OTT services in Europe wasestimated in the range €2,600 - €3,700 annually per

connected consumer

Dynamics in the Value Chain…

BEREC – 2015 Report on OTT services (from BCG)Telco 2.0

European Parliament – Policy Dept. Study 2015

…and in thegame rules

EU Commission - EU Actions


Transformation: where ?

IP basicconnectivity

Network basic Functions

Value Addeddelivery

Net Value andQuality Functions

Over The NetApplications

TelcoApplications

Third PartiesApplications

Net NeutralityRegulation

Net NeutralityRegulation

PlatformsRegulationPlatforms

Regulation

A «layered» vision could help

RoutingTransmission

Access…

AAAMobility MGT

NetContextAwarenessTraffic Optimization

Caching…

ServicesServicesServices

…


Optimized for «All-IP» scenario (uniform best handling of all IP traffic, Availability, Reliability,…)Efficient TCO endless reduction (Minimize the capex&opex-per-bit)Capillar F&M UBB + «new» traffic (IoE) (Seamless connectivity; persons, companies, objects)

Optimized for QoE (Throughput, Latency, Download Time,…)Flexible Fast & «Inexpensive» new Functionalities introductionNew Revenues Enabler (Enhanced «delivery services» monetization for a multi-sided market)

Optimized for Application Building & OfferCompetitive to attract EndUsers & Developers (performant, easy to use…)Business Models Enabler (traditional service offers, vertical markets business, partnership)

…Key requirements for the “transformed” net.

Requirements for the «stars»:

Requirements for the «sky»:

Requirements for the «sea»:


Business transformation

THE OPERATORS’ VALUE PROPOSITION MAY LEVERAGE ON NEW BUSINESS MODELS

Valued AssetsProvider

Partner ServicesProvider

ConnectivityProvider


Net Value& Quality

Functions

IP BasicConnectivity

Sea-Sky-Stars... and the Slice conceptExample: IP Basic Connectivity

Network Slice

Slice«IP Basic Connectivity»

Any specific selection of «Functions» may be seen as «a slice»

…. some applications may ask for a simple “best effort” connectivity:

Access Node Networking NodeQoE/Net Value enabling function

Control function

Operator services,Enterprise/VerticalsOperator services,Enterprise/Verticals

Telco Third Parties ApplicationsApplications

• IP Edge Functions• Mobility Mgmt• - - -


Net Value& Quality

Functions

IP BasicConnectivity

Sea-Sky-Stars... and the Slice conceptExample: Enhanced Delivery

Network Slice

Slice«Quality Enhanced

Delivery»

Any specific selection of «Functions» may be seen as «a slice»

….other applications (e.g. video services) typically ask for specific requirementsbetter addressed with dedicated QoE platforms ….

Applications

• Caching• Accelerations• - - -

Access Node Networking NodeQoE/Net Value enabling function

Control function

Operator services,Enterprise/VerticalsOperator services,Enterprise/Verticals

Telco Third Parties Applications


Focus on: IP Transport Performance and QoEFor a «properly designed and managed» IP Networks (no bottlenecks orsystematic congestion), Performance/QoE is mainly limited by:

Network Latency (RTT) and Packet Loss (PL)

E.g.: RTT= 40ms; PLR= 0,02% ThrTCP < 20 Mbps; PLR= 0,2% ThrTCP < 6 MbpsRTT= 120ms; PLR= 0,02% ThrTCP < 6 Mbps; PLR= 0,2% ThrTCP < 2 Mbps

Bandwidth increase and QoS Functionalities are not sufficient to improve QoE(*):

(*) M.Mathis et Al. , “Macroscopic Behavior of TCP Congestion Avoidance Algorithm, July 1997

…it is not sufficient to work only at the «IP basicconnectivity» level… x


TCP Acceleration CachingBoth are QoE Enhancement Functions, operating over the IP Network Layer

( no regulation restrictions expected)

Throughput Improvement Throughput Improvement &Network Capacity saving

Suitable for all TCP-based traffic – better for «bulk dataflows» (e.g. high def. Video)

Suitable for all TCP-based unencrypted traffic -better for «popular contents»

Suitable for «fixed» and «mobile»Throughput improvement depends on «where» deployed in the network

Best «in the middle» of E2E path Best «near to EndUsers» (…but depends also on CacheEfficiency…)

«Sky» Functions (caching, acceleration) improve QoE

CachingTCP Acceleration

Virtualization (…and IP Edge Function distribution) can help…


Transformation key choices

«Flat» architecture, suitable tosupport Functions distribution

«Centralized» architecture, optimizedto deploy most of the Functions in

few «big» nodes

IP basicconnectivity Network basic

Functions

Rely on few «comprehensive»solutions (..and suppliers)

All-In-One approach

Software-ization & virtualization

NFV deployment challenges (SW Ecosystem entanglement, OperationalEfficiency, Performance, Open Source… )

Mix & Match approachSolutions, Products, Vendors

HeterogeneityValue Addeddelivery

Net ValueFunctions

… yes, but to what extent ?

Service & InfrastructureSeparation (Telco) Services provided “by the

network”Over The NetApplications

Telco Applications Third PartiesApplications

Deep changes in Process,Organization, Rules

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