keynote changsoon choi sk telecom 2
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Leveraging NetworkVirtualization forFuture ICT Converged NetworkFuture ICT Converged Network
Alex Jinsung Choi, EVP, Head of ICT R&D Division, SK Telecom
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Q. LTE subscribers and penetration rate in SK Telecom?
19 Mil39% CAGR
A. 39% CAGR increase in LTE subscribers and 48% market share
SK Telecom Drives LTE/LTE-A in Korean Market
2011
0.6 Mil
2012
7 Mil10 Mil
2013.4 2013 2014 2015
Launchedin July 2011
14 Mil
17 Mil39% CAGR(2012-2015)
26%
LTE %
37%
3%
53%
65%
73%
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ChallengesSKT is transforming the network against mobile data traffic explosion>> Traditional approach: Physical-layer innovation
Mobile Data Traffic Growth Dramatic increase of mobile traffic - Data traffic surges due to the increasing number of smartphone users and the spread of LTE
Network Evolution for Higher Capacity Exploiting heterogeneous network portfolio to
support explosively growing data Topology reshaping with small cells is on-going-Need lots of investment and time-Network complexity grows exponentially
0.4PB
2.2PB
3.5PB
5.7PB
7.1PB
19.2PB
40.3PB
53.3 PB
65.5PB
`10.8 `10.12 `11.3 `11.6 `11.9 `12.9 `13 `14 `15
Petabyte/Month
Year
Petabyte/Month
3G unlimited
data plan
(10.8.16)
LTE
(11.7.1)
1 2 3 4 5 6 7 8 9
HSPA+3FA
6 SectorW-SCAN
MCCumulative Capacity GrowthLTE
WCDMA
Wi-Fi, Femtocells
Time
2011.7
2012.7
2010.7
-Network complexity grows exponentially
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Computing Evolution- It allows IT infra techniques to be extensively used even for network technologiesTelecommunication infrastructure become more like IT infrastructure
IT Cloud
Computing Evolution for ICT Convergence N/W
(Data Center)Network ?
Software defines functions in telecommunication networks
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Infrastructural Innovation is InspiredBoth SDN and NFV help to build the network that has the potential
to increase operator agility, reduce the costs, and disrupt the vendor landscape
Encourages innovationand competiveness
Open, flexible, and innovative networking Cost-effective and efficient infrastructureVirtualized Network Functions
PE Router
P-GW/S-GW
Software-Defined Networking Network Functions Virtualization
Innovative Network Apps and competiveness
among 3rd Parties
CapEx/OpEx saving
Data Plane
Control Plane Open Standards
DPI
Firewall
CDN
WAN Accelerator
PE Router
P-GW/S-GW
CG-NAT
Standard/High-Volume Servers
Standard/High-Volume Storage
Standard/High-Volume Switches
Orchestrated,Automatic & Remote Install
Network Appsfrom 3rd Parties
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Harnessing the Transformative Nature of SDN/NFV
Migration to the efficient and extremely efficient alternative to the legacy
Vendor-specific H/W, Lack of Scalability and Flexibility,
Limited Intelligence
Virtualized,Service-Oriented and Flexible Network
Legacy Network Software and Cloud-based Network
RU#1
RU#2
RU#N
#1
#2
#N
Internet
EPC DPI Video
Opt.
CDN
Access Network Core Network
DU Pool (A-SCAN)
RU#1
RU#2
RU#N
Internet
DU #N
DU #1
DU #2
S/W
IMS
EPC
Video Opt.
DPI
CDN
TCP Opt.
S/W
Orchestrator
SDN/Cloud Controller
Analytics
Platform
Analytics-based Control
GPP, Standard H/W
Web Accel.
PCRF
Carrier Cloud Managed by SDN
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A Small Start: SDN-Enabled Dynamic VAS Platform
SGi/Gi Service Network
Device
InternetEPC
SDN Network
On Context A
SDN
Controller
SDN/NFV provide a highly scalable and flexible middle-box networkingfor the network optimization and service innovation
As-Is To-Be
SDN minimizes the time-to-market of new innovative servicesNetwork congestion-aware traffic optimizationApplication-aware dynamic traffic managementPersonalized and dynamic value-add services (VAS) will be realized
Lack of Scalability: most traffic passes through every in-line service nodeHuge capital investment is indispensable against unpredictable data explosion
Lack of flexibility: manual & static policy control & enforcementLack of flexibility and agilityOperational complexity grows fast
Device
InternetEPC
Device
Internet
On Context A
On Context C
EPC
On Context B
Dedicated appliances performing
specific network functions
Virtualized network functions
running on standard H/W
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MNO's Requirements: 3GPP CompliancyFor the seamless integration with mobile networks, 3GPP-compliancy,
subscriber-awareness, service-awareness and controllability should be devised
MME PCRFS1-MMES6a
DPI?? ?
HSS
UE Internet
Core Network
eNode-B
RAN
S1-U
S11 Gx
S-GWData Plane
SGiP-GWData Plane
SDN Protocol
SDN
Control Plane
SDNControllerS/P-GW
Control Plane
For those features, standards got left behind, and vendor-specific/vendor-isolated solutions are raging
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MNO's Requirements: Performance & ReliabilityOperators expect 100% reliability and availability, and deterministic performance:
Those requirements should be collected, and reflected in the technology
Pipe functionseNodeB, P-GW or DPI requires high-performance data plane (packet processing), 100% reliability & availability, and extremely low latency
Transaction10000CPS
Virtualization Requirements
availability, and extremely low latency performance.
Control functions SON, MME, PCRF or CSCF, that controls pipe workloads, requires high-performance signal processing as well as near 100% reliability & availability
Services functionsSMS/MMS, IMS AS or CDN that provides telecoms value-add services (Similar to trivial IT workloads)
Latency
Throughput
Availability100%
100Gbps
50ms
5000CPS
99.99%
Service
Control
Pipe
1ms1Gbps
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Concluding Remarks
Networking paradigm shift is just around the corner SKT is transforming the network to support the mobile data traffic explosion SDN/NFV will help operators to build more efficient and economic network
Mind the Gap: for the success of SDN and NFV in the wild, Viable use cases should be collected The technology should address the MNO-specific requirements The technology should address the MNO-specific requirements Lessons learned from Proof-of-Concept and Pilots will be shared
Remaining question: Has the eco-system got ready? Carrier-grade and innovative applications by 3rd parties must be encouraged andsupplied for the open innovation
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