How SDN changes Cellular Networks경희대학교 컴퓨터공학과 이성원 교수

1

KRnet 2013

2

Ice-Break

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Network is Dead

4

Really?

World Mobile Internet Traffic Volumes @ 2008

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1%}However,  mobile  Internet  traffic  volume  reaches  the  traffic  volume  of  wired  Internet  @  1996.(12  years  gap)

=Mobile Internet

Whole Internet

World Mobile Internet Traffic Volumes @ 2012

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10%}Mobile@2008  =  Wired@1996Mobile@2010  =  Wired@2000  x  3Mobile@2011  =  Wired@2000  x  8

=Mobile Internet

Whole Internet

Mobile Internet Traffic Ratio per Nations @ 2012

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North America

Africa

Asia

India

10%

14.85%

18.84%

50%

Wired Internet - Starting Point to Consider

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1G

2G

3G

4G

5G

Wired Internet Mobile Internet

Email,  Telnet,  FTP

Web  (Directory,  Search)

Instant  Message,  Blog,  VoIP

SNS,  Streaming,  IPTV,  MMORPG

N-­‐Screen  IPTV

Email

Web  (Search)

Instant  Message,  VoIP

SNS,  Streaming

IPTV,  N-­‐Screen  IPTV

Similar services in Reduced time gap

Wired  Internet:  1990~2012.Mobile  Internet:2000~2012.

MMORPG??  &  New  Ones6G

What’s going on in Mobile Internet?

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0.2% for 6%LTE  network  (globally  0.2%  coverage)  covers  6%  of  world  mobile  internet  traffic  in  2012.

52%Mobile video

traffic surpass 50% in 2011.

More Traffic from Mobile Devices

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PC Tablet Phone PC Tablet Phone

20162011

More Traffic from Mobile Devices

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iOS12008

iOS32009

iOS42010

iOS52011

iOS62012

PhoneSMS/MMSMailWeb-­‐browserYouTubeMapsCamera

Video  recordingTetheringiPadFind  My  iPhoneGPS  Enhance

ReXna  DisplayFaceXmeiBook

Camera  EnhanceiMessageiPhotoiMovieSiRiiCloudTwi[er  IntegratedGaragebandPageKeynoteNumbersRemainderNoXficaXon  CenterGame  Center

Facebook  IntegratedApple  Map

iOS22008

AppStore

More Content from Next Generation SNS

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SoLoMo

Friendingand  SharingPersonalized,  Localized  info  or  content  such  as  LocaVon,  Profile,  Song,  Moviethrough  RealVme,  Mobile  CommunicaVon

Social,  Local,  Mobile

Today

Text/Photo  SharingGamingCommerce

FourSquareWhrrlTextPlusTextFreeShazamSpoVfyObama  2012NHN  Band

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Software“그리고, 누군가는 뭔가를 열심히 만들고 있다”

Open Source Networking Solutions오픈소스 네트워킹 기술 소개

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OpenWRT (WLAN AP)

GNU Radio (software defined radio)

OpenBTS (GSM base-station)

OpenBSC (GSM/3GPP AN)

osmoSGSN (3GPP CN)

osmoGGSN (3GPP CN)

Open EPC (3GPP CN)

Open vSwitch (virtualized switch)

Open Source Routing (core network router)

Quagga (IP router)

OpenMIH (IEEE 802.21MIH)

OpenFlow (network virtualization)

Cacheboy CDN (CDN)

CCNx (CCN)

OpenStack (Cloud computing platform)

OpenStack Melange (Cloud Network control)

Open Compute Project (all about data center)

Linux call router (ISDN PBX)

Asterisk (VoIP)

OpenNOP (WAN optimization)

WANProxy (WAN optimization)

TrafficSqueezer (WAN optimization)

Open Source Networking Example“오픈소스 네트워킹을 통해서 당신은 어떠한 네트워크도 만들수 있는 가능성을 가진다”

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Open Source New Mobile OSsLinux 기반의 새로운 모바일 운영체제들, 그리고 복수 운영체제 단말의 등장

16 Reference: http://www.visionmobile.com/blog/2011/10/from-meego-to-tizen-the-making-of-another-software-bubble/

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Software Companies“또한, 누군가는 새롭게 네트워크 사업자면서 제조업자가 되고 있다”

Case Study : Google’s Identity?“ 구글은 분명히 광고로 돈을 버는 회사입니다... 광고로 돈을 벌려면 어떤일을?? ”

18 Reference: https://www.google.com/doodles/finder/2013/All%20doodles

Google Router웹 트래픽을 실어 나르는 길목이면서, 콘텐트 캐싱과 분배의 핵심 장비

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• Built from merchant silicons

- 100s of ports of nonblocking 10GE

• OpenFlow support

• Open source routing stacks for BGP, ISIS

• Does not have all features

- No support for AppleTalk

• Multiple chassis per site

- Fault tolerance

- Scale to multiple Tbps

Google Wide Area Networks우리 콘텐트의 서비스 품질은 우리가 보장한다

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Google Transport Protocol웹 트래픽을 실어 나르는 프로토콜이 마음에 안들면 새로 만들지 뭐

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Google as HTTP 2.0 Founder통신 표준도 어렵지 않군

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Google Fiber Networks집안에 기가 이더넷을 넣으면 뭘 할 수 있을까? 넣어 보지 뭐...

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Google Mobile NetworksTV White-Space 로비스트, 프로모터, 그리고 자가망 사업자

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TVWS 테스트베드 TVWS 주파수 지도

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Software Defined Network ?“누군가에게는 신기술, 누군가에게는 이미 있던 오래된 기술”

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OpenFlow: The Dawn of SDN“OpenFlow is a way for researchers to run experimental protocols in the networks”

Controller

OpenFlow Switch

Flow Table

Secure Channel

PC OpenFlow

Protocol

SSL

hw

sw Rule Action Stats

Packet + byte counters

1.  Forward packet to port(s) 2.  Encapsulate and forward to controller 3.  Drop packet 4.  Send to normal processing pipeline

Switch Port

MAC src

MAC dst

Eth type

VLAN ID

IP Src

IP Dst

IP Prot

TCP sport

TCP dport

+ mask

SDN in Wide View“구글이 해결하고 싶은 것들이 무엇이겠는가?”

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Open Programmable

CommonPlatform

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"SDN is not just about OpenFlow and routers. It's about being able to create an abstraction layer, a control plane, to connect what is happening in networks, data centers, and private

clouds and tie in OSS/BSS features," especially analytics functionality, "with that control plane. It's also about network

exposure. The OTT players are leading the way in service creation and they want access to network functionality, such as IMS [IP

Multimedia Subsystem], to make it easier to create new applications."

Ericsson’s Definition of SDNEricsson CTO, Ulf Ewaldsson

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CAPEX & OPEX 절감

3rd Party 콘텐트의 경제성 있는 전송 방법

신규 서비스 및 수익원 발굴

Why SDN ?“기존의 Telco 사업자가 풀어왔던 전통적인, 아주 전통적인 문제는 뭔가”

Why SDN ?“기존의 Telco 사업자가 풀어왔던 전통적인, 아주 전통적인 문제는 뭔가”

30 Reference: opennetsummit.org

Common Platform“같은 하드웨어인데 소프트웨어만 다르다, 그런데 왜 자꾸 하드웨어를 사라고 하지?”

31 Reference: Nokia Siemens Networks “(White paper) Open Core System”Reference: Network Functions Virtualisation – Introductory White Paper

Programmable“Software가 장비다. 그리고 나도 소프트웨어를 만들어서 넣을수 있고 넣고 싶다”

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RUDU

ProcessorStorage

OpennessControl & Bearer Separation, Centralized Control, Open Control, Virtualization

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Return of Control & Management

Plane

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Software Defined Wireless Network

Easy to Understood by Mobile Networkers“SDN은 무선 네트워크, 그리고 무선 네트워크 엔지니어에 더 친숙하고 유용하다”

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IP Switch/Router are not transparent any more.

Still hold control & management plane.

Friendly to centralized servers.

Already common platforms.

SDN is not a new one - another version of ATM/No.7/IN/Parlay.

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Functional Separation of PGW“PGW를 Control/Bearer-Plane 장비로 나눠서 저가격/형상다양화/중앙제어 지원”

PGWBearer

#1

PGWControl

#1

OpenFlow++

PGWBearer

#2

PGWControl

#2

OpenFlow++

Distributed ControlArchitecture

PGWBearer

#1

Femtocell

PGWBearer

#2

Macro PGW

PGWBearer

#3

CommercialSwitch

PGWBearer

#4

CommercialRouter

PGWControl

OpenFlow++

Centralized ControlArchitecture

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DPI based Path Selection“기존 IP라우팅을 버리고 프로토콜/서비스 정보에 따른 트래픽 별 경로 정의”

MobileDevice

UE FemtocellOperatorNetwork

Internet

PathController

OperatorContents

ISPContents

ISPContents

OperatorContents

OpenFlow++

DPI: Deep Packet Inspection

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IPv6 based on Path Switching“Permanent한 IPv6 주소 할당과 Path Switching 기반의 패킷 포워딩 적용”

IPv6 Client

eNB(Path Table)

UE Switch(Path Table)

Switch(Path Table)

PGW(Path Table)

IPv6 Anchor

PGWControl

OpenFlow++(Local Path control for UE mobility)

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Contents Sharing & Distribution in RAN/CN“RAN 및 CN 장비간에 사업자와 3rd-Party의 콘텐츠를 ICN(CCN/CDN/NDN)/P2P 기반 공유”

HTTP Client

eNB(캐쉬)

HTTPServer

eNB(캐쉬)

eNB(캐쉬)

Switch(캐쉬)

Switch(캐쉬)

Switch(캐쉬)

PGW(캐쉬)

PGW(캐쉬)

PGW(캐쉬)

RAN내콘텐츠 공유

미들박스형콘텐츠 공유

CN내콘텐츠 공유

계층간콘텐츠 공유

계층간콘텐츠 공유

UE

ICN: Information Centric Network, CCN: Content Centric NetworkNDN: Named Data Network, CDN: Content Delivery Network, P2P: Peer-to-Peer

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Information Centric Handover“콘텐츠를 소비하는 단말의 핸드오버시 새로운 기지국에서 동일 콘텐츠를 빠르게 획득”

Router

Router

Router

Edge Router (Firewall)Content

Server

Edge Router(Firewall)

Router

Router

Router

PGW(Cache)

PGW(Cache)

WLAN Switch(Cache)

PGW(Cache)

Before

AfterICNServer

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Information Centric Handover with DiffQuality“콘텐츠를 소비하는 단말의 핸드오버시 새로운 기지국에서 동일 콘텐츠를 무선품질에 맞게 획득”

Router

Router

Router

Edge Router (Firewall)Content

Server

Edge Router(Firewall)

Router

Router

Router

PGW(Cache)

PGW(Cache)

WLAN Switch(Cache)

Before

After

ICN Server

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SDN based 5G Core NetworkHarmonization with Big-Data

Macrocell

Femtocell

OperatorWLAN TVWS

PGWControl

OpenFlow++(실시간 동적 망 제어)

지역별 부하 상황 시간대별 부하 상황

지역별 가입자 분포

가입자별 과금 계약 현황

실시간 ISP 콘텐츠 선호도

...Big-Data 기반

실시간 동적 망 설계

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Ericsson’s SDN“기능 모듈화된 소프트웨어 블록들의 연결 = RAN/CN 장비 (물리 형상의 소거)”

Reference: Ericsson Technical Review, Feb 2013.

44

NTT’s SDN for MPLS“Network & Node Virtualization”

Reference: NTT Technical Review, “Feature Articles: ICT Infrastructure Technology Underlying System Innovation”

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Software Defined Wireless Network

Kindle Ways

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“아마존은 단지 홈쇼핑 회사가 아닙니다”

Google Web Networks안드로이드 단말을 통해서 오고 가는 건 모두 다 봐주리라

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Conclusion

Just a Good Sound, and None of Your Business?

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San  Francisco  Bay  Photography    Spas  and  Retreats

HTTP is King“현재 무선 & 유선 인터넷 트래픽의 70~80%”

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No more TCP/IP!

No E2E Service.

Switched Network.

Media Streaming & File Transfer Protocol.

Content Caching and Delivery Network.

We @ New Wave“우리는 현재 새로운 네트워크의 패러다임으로 들어가고 있음”

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5G Network Design Philosophy“전통적인 목표는 지속적으로, 당면한 문제는 해결하도록”

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EVERLASTING RULES NEW VIEWS ON CONTENTS KILLER 5G

•  Faster  air  speed•  Cost  effecVve  network

•  Contents  aware•  ProacVve  &  PredicVve  delivery•  Accelerated  transport•  New  QoS  &  Handover+  Open  source  sodware  network

Services  and  Contents  integraVon  into

5G  Mobile  Networks

+ =

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IT FRIENDLY 5G MOBILE NETWORKUse  emerging  and  matured  IT  

technologies  into  5G  Mobile  Network.

Content Cloud Big  Data

Service & network Integrated 5G

SDN

“Telco의 기술에 집착하지 말고, IT의 기술을 효율적으로 흡수하는 吸星大法”

5G Network Design Philosophy

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One More

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User Created Content

UCC

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User Created Network

UCN

57

Network is Everlasting

58

Network is Everlasting

Just, people in and out.

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How SDN changes Cellular Networks경희대학교 컴퓨터공학과 이성원 교수

Email: drsungwon@khu.ac.kr

Web: http://mobilelab.khu.ac.kr/