Handover Technologies over Multiple Wireless/Mobile …C1%… · · 2012-03-20Handover Technologies over Multiple Wireless/Mobile Networks ... GSM CDMA 망구축현황 GSM

Handover Technologies over Multiple

Wireless/Mobile Networks

조일권

[email protected]

http://www.nia.or.kr/Index.aspx?PortalID=ko

KRnet 20102

목차

3rd Phase BcN Trial Service Project

Vertical Handover Technology

VHO Implementation

Summary & Discussion


3rd Phase BcN Trial Service Project

KRnet 20104

BcN concept & architecture

Unified single IP network - All IP network

Converged services

Reduce CAPEX & OPEX

ITU-T의 NGN

PS

TN

Wir

ele

ss

Inte

rne

t/D

ata

CA

TV

Service and Control

Packet Transport

Wireless Broadcast

Wired

Service and Control layer

Transport layer

Subscriber’s network layer

Home & Equipment layer

3rd

Phase 1st & 2nd

Phase


KRnet 20105

ITU-T의 NGN architecture (R1)

Service 평면과 Transport 평면

Transport 평면: NACF, RACFApplications

Application Support Functions

& Service Support Functions

Resource and

Admission

Control Functions

(RACF)

Transport Functions

Transport Control Functions

Service Control FunctionsService user

profiles

Transport user

profiles

Network Attachment

Control Functions (NACF)

Service Stratum

Transport Stratum

Other

Networks

Management

Functions

End-user

functions

NNI

UNI

ANI

Control Media Management


KRnet 20106

참여 컨소시엄

유비넷, 옥타브, 광개토, 케이블BcN


KRnet 20107

Project Phases

1st Phase(’04~’05year) : driven by new converged services

2nd Phase(’06~’07year) : driven by QoS

3rd Phase(’08~’10year) : driven by VHO

Network Convergence

Direction

of

BcN Pilot

Project

Promote broadband

by means of developing

new converged services

Service Convergence

Promote constructing

QoS supported network

and Commercializing

Promote QPS and

network convergence

by means of VHO and

QoS control

BcN

Construction

Primary Plan

1st Phase: Base

Each phase of BcN

2nd Phase: Stride 3rd Phase: Complete


KRnet 20108

2nd Phase network

BcN Transport Architecture

음성영상전화, IPTV, Virtual leased line, WiMAX traffics

SER

Residential Gateway

Service EdgeRouter

IP-VDSLMetro Ethernet(LAN)

FTTH

50~100Mbps broadband subscriber’s line

Internet Core

802.1P / Diffserv(Priority / DSCP)

Diffserv (DSCP)

Diffserv over MPLS(Exp)

RGW

NGN Core

QoS Enabling points

DiffServ

802.1p DiffServ

DiffServ over

MPLSDiffServ

802.1p


KRnet 20109

3rd Phase

2nd phase 유무선통합 시도영상전화(VoIP) 유무선간 연동 (유무선 IMS 연동)

Wired service provider, wireless service provider

방송통신 설비사업, 자원기반 사업전략, 유선무선 사업경계

3rd phase 환경

유무선사업자 인수, 합병 (SKT/SKB, KT, LGT~LGUplus)

유무선통합전략, 타산업분야 진출전략

네트워크 통합/관리

유선가입자망의 광역국사화

유선광역국사의 무선국사 흡수

전송망의 공유

서비스(콘텐츠) 컨버전스 제공 환경

FMC 서비스와 표준기술


KRnet 201010

ITU-T의 NGN architecture (R2)

Transport 평면에 MMCF 추가Mobility Management Control Function (위치관리, 핸드오버관리)


KRnet 201011

BcN 시범사업 로드맵

Concept

2004 2005 2006 2007

2008 2009 2010

IMS

Wired-centric

Promotion

Wired & wireless Convergence

Promotion

DevelopServices

음성전화

DCATV

Inter-operWired & mobileVideo telephony

FTTHFTTHDOCSIS QoS OpenAPI

IPTV

VideoIP telephony

VHO Femto IMS-SC

FMS

FMCmVoIP

mIPTV

4screen

QoS

Yr


KRnet 201012

3rd Phase 주요 내용

FMC, FMS, ISC

Vertical Handover (FMC (2.0))

FemtoCell (FMS 2.0)

Session Continuity (ISC)

Multi-mode device-based mobilityWiFi & EVDO, WiMAX & HSPA (& WiFi)

WiMAX Femto

Multi-screen-based Communication session mobility


Vertical Handover Technologies

3GPP

IEEE

IETF

KRnet 201014

VHO types – layer별 분류

서비스 요구사항과 Layer에 따른 구현 범위

Inter domain

Inter Subnet

Inter RAT

Intra domain

Intra Subnet

Intra RAT

Application &

Session Control

Service

Continuity Fast/Seamless


KRnet 201015

Domain, Subnet, RAT

서비스 요구사항Service continuity : user의 인식 허용

Fast/seamless

DomainAdministration domain

인증, 과금

연동 or 통합 접근

Subnet Flat network or subnet 환경

IP mobility

RATRadio Access Technologies (Heterogeneous)

Candidate RAT : WiBro, HSPA, WiFi


KRnet 201016

VHO관련 표준기술

3GPP/2, IEEE, IETF 요소기술 측면 ISC (<< VCC)

MIP 계열

MIH (802.21)

RAS

Node B

AP

Media

IP

Service

&

Session

IEEE

Media Independe Handover

IETF

Mobile IP family

3GPP/IMS

VCC, ISC

HSPA

EVDOWiBro WLAN


KRnet 201017

3GPP 접근방향(1)

3GPP와 WiFi

I-WAN (3GPP R6) : WAG, PDG (SGSN, GGSN 대체 – 코어망)

PS domain target

GAN (Generic Access Network) ~ UMA

Voice, PS, GAN을 (GANC를 통해) 3GPP AN과 동일하게 취급

자료: 참고문헌 3자료: 참고문헌 1 자료: 참고문헌 3


KRnet 201018


3GPP EPC (R8)

3GPP legacy, WiMAX, WLAN를 수용

자료: 참고문헌 4


KRnet 201019


EPC가 WIMAX CSN을 흡수WiMAX network architecture (CSN: AAA, HA, DHCP)



KRnet 201020


ANDSF : Access Network Discovery & Selection

PCRF : Policy & Charging Rule

FAF : Forward Authentication (3GPP access & resource allocation)

자료: 참고문헌 4, 5

WiMAX

PCC

3GPP R8

PCC


KRnet 201021

IEEE의 접근방향(1)

802 component to other handover standards

IEEE

802.11 VHT

802.16m

3GPP

VCCI-WLAN

SAE-LTE

IEEE 802.21• Digital Broadcast Handover• Muti-Radio Power Mgmt.• Security Signaling• Emergency Services

IETF

PMIPFMIPSIP

HIPNETLMM

HoKEY MIPSHOP

DMB DVB-H

MediaFLO

802.15



KRnet 201022


IEEE 802.16 & 802.11

MAN과 LAN간의 VHO를 결합한 4G 모델

자료: 참고문헌 11Opt. 4, 5: handover policy (profile)


KRnet 201023


3GPP EPC 모델에서 MIH deployment (Multi-PoS, IS)



KRnet 201024

MIH msg flows (1)

Handover Initiation State (WiMAX > (E)UTRAN)

Handover 시작의 기준이 되는 threshold 설정

Ready



KRnet 201025

MIH msg flows (2)

Handover Preparation State 주변 PoA 정보수집, PoA를 스캔, target PoS/PoA rsc 검사, 확정, 예약


KRnet 201026

MIH msg flows (3)

Handover Execution

핸드오버시작, IP할당 및 Binding Update, 핸드오버완료


KRnet 201027

IETF 접근방향(1)

Network layer consistency (Mobile IP series)



KRnet 201028


단말기반에서 네트워크기반으로 (Proxy Mobile IP)



KRnet 201029


3GPP EPC 모델에서 PMIP deployment



VHO Implementation

Case 1 (KwangGaeto Consortium)

Case 2 (Ubinet Consortium)

Case 3 (Octave Consortium)

KRnet 201031

MIH user = MIP

MN Serving Network Candidate Network OtherOther

IP MIH L2Up MIIS UP entityL2 MIH IP L2 MIH IP

Information Query & Resource Available CheckMIH_Get_Information_Request, MIH_Get_Information_Response

MIH_Net_HO_Candidate_Query

MIH_N2N_HO_Query_Resources

Resource Preparation

MIH_Net_HO_Commit

MIH_N2N_HO_Commit

L2 Connection

Link Up

MIH_Link_Going_Down

RA, BU, RR

MIH_Link_Up

L3 Connection

Resource ReleaseMIH_HO_Complete

MIH_N2N_Complete


KRnet 201032

MIH user = PMIP







MIH_Net_HO_Commit

MIH_N2N_HO_Commit

L2 Connection

Link Up

MIH_Link_Going_Down

PBU, RA, RR

MIH_Link_Up

L3 Connection

Resource ReleaseMIH_HO_Complete

MIH_N2N_Complete


KRnet 201033

MIH user = FMIP







MIH_Net_HO_Commit

MIH_N2N_HO_Commit

L2 Connection

Link Up &Resource Release

MIH_Link_Going_Down

FBU

RA (NCoA)

Packet Forwarding

FNA

MIH_Link_Up

MIH_HO_Complete

MIH_N2N_Complete

HI


Case 1 (KGT)

- WiFi & CDMA PS VHO


배경

Target Service:

모바일 IPTV(unicast) 접근을 위해 VoD 서비스부터 출발

IMS기반의 mVoIP 고려

ISP 사업자 입장에서 적극적인 접근이동망과의 통합적인 시각보다 ISP가 handling 가능한 시각에서 기

술을 고려하는 것부터 출발

IP mobility : Mobile IP와 유사한 Proprietary protocol (xGMIP)을 적용하여 해당 network If에 맞게 customizing, Kernel level 동작, 안정화, MIH integration 등 상용수준으로 upgrade

Test-bed architecture

WiFi/EVDO

MIH single PoS

xGMIP Dual CoA &

Dual tunnel

@handover

CoA binding used

like MIP

Operating in

xGMIP protocol

aware domain AP(Non-PoS)

Wi-Fi

CDMA EVDO

handover

기지국

Access network(Wi-Fi)

Access network(3GPP2)

EvDO-PDSN (Non-PoS)

MIH capabile MN

Home Network

MIH PoSInformation Server

xGMIP Server

TGW

InformationDB Server

모바일 IPTV Server

xGMIP protocol msg flow

LMC(MN) Serving Network CNLMS

IPLMC LMS TGWIPLink #1 Link #2 Link #1

Candidate Network

IPLink #2 IPLink

Tunnel RequestTunnel Create (#1)

TC Ack

BU Ack

Link Access (L2 Connection and CoA#1 Allocation)

Link Access (L2 Connection and CoA#2 Allocation)

Tunnel Delete (#1),TD Ack

Tunnel #1

Tunnel Create (#2)

TC Ack

Vertical Handover

Binding Update (life time = 0, tunnel #1),

Tunnel Response

BU Ack

Binding Update

Link State Event

Tunnel Request

Tunnel Response

Tunnel #1 via Serving Network

Tunnel #2 via Candidate Network BU Ack

Binding Update

WiFi start MIH session

MN MIH Svr

MIH_Register Request

MIH_Register Response

MIH_Push_Information

WiFiCDMA xGMIP Svr

WiFi 접속

xGMIP

xGMIP 등록

MIH

WiFi to EVDO Handover

MN MIH SvrxGMIP Svr

Link going down

xGMIP Tunnel make

MIH_MN_HO_Complete Request

MIH_MN_HO_Complete Response

WiFiCDMA

xGMIP

EVDO start MIH session

xGMIP

xGMIP Regi.

MN MIH Svr

MIH_Register Request

MIH_Register Response

MIH_Push_Information

WiFiCDMA xGMIP Svr

EvDO CDMA 접속

EVDO to WiFi Handover

xGMIP Tunnel make

xGMIP

MN MIH SvrxGMIP Svr

MIH_Net_HO_Commit Request

MIH_Net_HO_Commit Response

MIH_MN_HO_Complete Request

MIH_MN_HO_Complete Response

WiFiCDMA

WiFi 접속 (CoA-W)

Case 2 (UN)

- WiBro & WCDMA PS VHO (1)


배경

CDMA

WCDMA

WiBro

GSM (+ GPRS, EDGE)CDMA (+ 1x, EVDO, Rev.A)WCDMA (+ HSDPA, HSUPA)WiBro (+ Wave 2)WLAN (a/b/g/n)

GSMCDMA

망 구축 현황

GSM (+ GPRS, EDGE)CDMA (+ 1x, EVDO, Rev.A)WCDMA (+ HSDPA, HSUPA)WiBro (+ Wave 2)WLAN (a/b/g/n)

+

HSPA+LTE (+ LTE Advanced)802.16m

망 구축 현황망 구축 현황

CDMACDMA + WCDMA + WiBro

(1x, EVDO) (HSDPA/UPA) (Wave2)+ ?

시험망 architecture

Target Service : 무선 인터넷MIH: Single POS(MIH Server), MIP: CMIP(WCDMA), PMIP(WiBro)

ㅇMIH- IEEE 802.21-2008

ㅇMobile IP- RFC 3344, ―IP Mobility Support for IPv4‖

- RFC 3024, ―Reverse Tunneling for Mobile IP‖

- RFC 3519, ―Mobile IP Traversal of Network- Address Translation(NAT) Devices‖

MIH 서버

첫째 수준WiBro => WCDMA 단방향만을 고려

이후 WCDMA => WiBro를 고려

Policy : user profile (WiBro preferred, WiBro only, WCDMA only)

hard handover (BBM mechanism)

단말 구현

USB dongle

Low power design – dual interface operation

MIP client

UDP/TCP/IP

WiBro stack

Windows APIs

AT commands

(over dedicated COM port

using Windows APIs)

C function calls

Provided by 3rd

party

Provided by InterDigital

Network Connection Controller

PC

USB

Dongle

Legend

C function calls

C function calls

SKT User Interface

WiBro Device

Driver

MIH

Messaging

Protocol(Communication with

server, Transmission

control)WiBro

Interface

Mobility Policy (Mobile-controlled or

Network-controlled handovers,

Error-handling, Etc.)80

2.2

1

Mo

bilit

y C

lie

nt Mobile IP InterfaceNCC Interface

OS

Abstraction

Layer(Timer control,

Threads, Tracing,

Etc.)WCDMA Interface

WCDMA Link Handler

CDMA2000 stack

CDMA2000 Interface

CDMA2000 Link Handler

계측기

DM 툴 (Dignostic Monitor)

WiBro, WCDMA if, MIH의 log를 분석

WiBro start MIH session

MIH MN HAWCDMA (FA)WiBro (FA)

WiBro Link Setup (Authenticate)(WiBro Preferred Mode)

MIP Registration Procedure

MIH Capability Discovery Procedure

MIH Registration Procedure

MIH Event Subscription Procedure (LinkType=WiBro)

IMS

DOMAIN

IMS Registration Procedure

Extract MIH Policy DB

(based on BSID)

MIHS

Data FlowData FlowData Flow

MIH Link Configure Thresholds Procedure (LinkType=WiBro)

IMS Session Starts

MIH Event Subscription Procedure (LinkType=WCDMA)

MIH Link Configure Thresholds Procedure (LinkType=WCDMA)

WCMA start MIH session

HA MIHS

MIH MN WCDMA (FA)WiBro (FA)

WCDMA Link Setup (Authenticate)(Non WiBro Area or WCDMA Preferred Mode)

MIP Registration Procedure

MIH Capability Discovery Procedure

MIH Registration Procedure

IMS

DOMAIN

IMS RegistrationProcedure


(based on Cell ID)



IMS Session Starts

MIH Event Subscription Procedure (LinkType=WiBro)

MIH Event Subscription Procedure (LinkType=WCDMA)

WiBro to WCDMA handover

HA MIHS

MIH MN WCDMA (FA)WiBro (FA)

IMS

DOMAIN

WiBro Setup

WCDMA Link Setup

MIP Binding Update Procedure

MIH_Net_HO_Commit.response

Data Flow switched

from WiBro to WCDMA

Tear Down Wibro L2 Link

MIH_Net_HO_Commit.request (Link type=WCDMA)

WCDMA started in IDLE

mode for handover

Success of WCDMA

System Information

Acquisition



(based on BSID)

WCDMA

MIH Registration Procedure (Re-registration, promptly regardless of ValidTimeInterval)


Back-Off Timer Starts

Get MN’s Location

Information through MIH

Registration Procedure

or MIH Link Event

Messages

WCDMA to WiBro handover

MIH MN HAWCDMA (FA)WiBro (FA)

IMS

DOMAIN

MIHS

MIH_Net_HO_Commit.request (Link type=WiBro)

MIH Registration Procedure (Re-registration, promptly regardless of ValidTimeInterval)



(based on Cell ID)

WiBro

WiBro started in IDLE

mode for handover

WiBro Link Detection Success

WiBro Link Setup

MIP Binding Update Procedure

MIH_Net_HO_Commit.response

Tear Down WCDMA L2 Link


Data Flow switched

from WCDMA to WiBro

WCDMA Setup

Get MN’s Location

Information through MIH

Registration or MIH

Information Service

Procedure

MIH Link Configure Thresholds Procedure (LinkType=WCDMA)

Back-Off Timer Starts

Case 3 (OV)

- WiBro & WCDMA PS VHO (2)


배경

Target Service

모바일 IPTV (from unicast ~)

양방향 방송모바일 VoIP (to prepare 4G..)

WCDMA, WiBro를 통해서 feasibility test

시장별 두가지 접근을 배경으로 했음WCDMA, WiBro, (WiFi)

기업시장 : MIH + MOBIKE (VPN)

MOBIKE ~ mobile IKE (Internet Key Exchange)

개인시장: MIH + CMIP

Business needs가 상대적으로 약한 것으로 보임

시험망 architecture

IP Premium 망WCDMA

WIBRO

xDSL/FTTH

IMS

IMS

Mobile IPTV Service Platform

VHO Platform

인코딩 서버

메뉴관리 서버

실시간 변환서버

DB

스트리밍 서버

MIH정책서버(MMCS)

MobilityG/W

Home Agent

Policy & Spec.

Policy profile User profile :

접속망 선호정책 : WiBro Preferred, WCDMA Preferred

서비스 기반선호 정책 : 응용프로그램별로 지정 Operator profile : non

참고 specification MIH (Single PoS)

IEEE 802.21-2008, ―IEEE Standard for Local and metropolitan area networks—Part 21: Media Independent Handover Services"

Client MIP RFC 3344, ―IP Mobility Support for IPv4‖

RFC 3024, ―Reverse Tunneling for Mobile IP‖

RFC 3519, ―Mobile IP Traversal of Network Address Translation (NAT) Devices‖

MOBIKE RFC 4555, ―IKEv2 Mobility and Multihoming Protocol (MOBIKE)‖

단말 구현 모델

Target 단말: 넷북 (USB dongles, each If)

MIH + Mobike

MIH + CMIP

Mobile IP Manager

UI (User Interface)

Handover/Binding Management

(MIH 연동)Key Management

Device/IP Management Protocol Management

Main Control

Module

Encapsulation Module Decapsulation Module

Network Interface Binding Management

User

Level

Kernel

Level

CMIPv4 IM Driver

Windows IOCTL

Windows Socket

(UDP)

Proxy ARP WiBro HSDPA WiFi

CMIPv4 Virtual Driver

Mobike

Mobile IKEv2

Security Association 유지

SA 재설정으로 인한 interrupt time을 최소화와 session 유지

IP mobility

Multi-homing

Summary & Discussion

Summary

3단계 시범사업 - 유무선통합 FMC

FMS

MultiScreen – session continuity

VHO 기술 IMS session, Mobile IP, MIH/OMA-DM

3GPP, IETF, IEEE

시범사업에서의 접근CS+PS domain : VCC (‘08년 개발완료)

PS domain : MIP + MIH (‘08-‘09년 개발완료)

시범서비스 & 표준화

‘10년도 시범서비스(VHO)상용망기반의 테스트베드 (시범가입자 수용)

시범가입자의 서비스에 대한 반응

선호도, 필요도 (선호 network If)

만족(시스템품질-안정,편의)

Policy 관련

상용화/정책 기반자료VHO 모니터링(사용/이동패턴, 성능)

PG 706 표준화 과제VHO architecture 정의

성능 requirement, 기능/성능 규격, 시험시나리오 등

Business & Tech Issue

VHO 의 business적인 이슈VHO 제공이 고객에게 appeal? 적극적 상품개발, 시장방어적

어떤 application으로 value added할 것인가?

VHO가 사용될 target multiple network은?

통합인증/과금기반의 상품접근

VHO 의 기술적인 이슈Single radio – MBB, Power consumption

통합인증/과금 (이종망간에 선인증 허용, 인증통합, 인증연동)

가입자정보, 망접속정보의 증가 (교차분석)

4G 표준화 – 기술 selection

WiFi, Femto – MIH IS 위치관리

Policy (Appliction aware, BW allocation function 구현 및 연동 등)

단말확보 – 상용화 ready

참고문헌

1) Analysis of SIP-based mobility management in 4G wireless

networks, Computer Communications‘04

2) SIP-based seamless-handoff(S-SIP) scheme for heterogeneous

mobile networks, IEEE WCNC‘07

3) MIH를 이용한 이기종 무선망간 Handover 기술연구, TTA Journal

4) Seamless Integration of Mobile WiMAX in 3GPP Networks, IEEE

Com. Mag. 2008

5) Integration of the IMS/PCC framework into the mobile WiMAX

network, IEEE Com. Mag. 2008

6) Improvements to seamless vertical handover between mobile

WiMAX and 3GPP UTRAN through the Evolved Packet Core, IEEE

Com. Mag. 2009

7) Network-based mobility management in the evolved 3GPP core

network, IEEE Com. Mag. 2009

참고문헌

8) IEEE P802.21 tutorial, DCN: 21-06-0706-00-0000

9) 방송통신망 중장기 발전계획, KCC, 2009

10) 광대역통합망기본계획 1, 2, 3, MIC & KCC 2004, 2006, 2007

11) Mobility using IEEE 802.21 in a heterogeneous IEEE

802.16/802.11-based, IMT-Advanced (4G) network, IEEE Com. Mag.

2008

12) Mobility testbed for 3GPP2-based multimedia domain networks

13) Mobility management architecture based on joint mobile IP and

SIP protocols

14) Mobility management for All-IP mobile networks: mobile IPv6 vs.

proxy mobile IPv6

15) Handoff latency analysis of mobile IPv6 protocol variations,

computer comm. 2007

참고문헌

16) Media-independent handover for seamless service provision in

heterogeneous networks, IEEE Com. Mag. ‘08

17) 유비넷컨소시엄 사업 보고서 ‘08, ‘09

18) 옥타브컨소시엄 사업 보고서 ‘08, ‘09

19) 광개토컨소시엄 사업 보고서 ‘08, ‗09

Documents

Handover Technologies over Multiple Wireless/Mobile …C1%… · · 2012-03-20Handover Technologies over Multiple Wireless/Mobile Networks ... GSM CDMA 망구축현황 GSM