HSN’06 (2006-02-24)

차세대차세대WiBroWiBro기술기술

2006. 02. 24.2006. 02. 24.

이동통신연구단 무선시스템연구그룹

휴대인터넷표준연구팀

윤철식

-2-HSN’06 (2006-02-24)

1. 1. 휴대인터넷휴대인터넷 표준화표준화 현황현황

-3-HSN’06 (2006-02-24)

IEEE 802.16 & IEEE 802.16 & WiMAXWiMAX Forum Forum 표준화표준화현황현황

IEEE 802.16 표준화현황2004. 4Q : IEEE Standard 802.16-2004 승인및발간 (1 Oct. 2004)2005. 4Q : IEEE 802.16-2004에대한 Corrigendum 규격승인2005. 4Q : IEEE 802.16e 규격승인2007. 2Q : IEEE 802.16g 최종잠정표준안의 RevCom제출2007. 2Q : IEEE 802.16g 규격승인

WiMAX Forum 표준화현황2005.4Q: NWG Stage 2 규격의WiMax Forum 이사회승인2005.4Q: NWG Stage 3 잠정표준안의승인2006.1Q: NWG Stage 2 & 3 발간2005.3Q: MTG System Profile 프로젝트2006.1Q: MTG IOT Document 프로젝트2006.2Q: MTG RCT 프로젝트

-4-HSN’06 (2006-02-24)

WiBroWiBro표준화표준화현황현황 (TTA)(TTA)

TTA 표준화현황및일정계획2003. 7: TTA 산하에 PG302 (휴대인터넷프로젝트그룹) 결성-무선접속실무반, 서비스및네트워크실무반, IPR Ad Hoc Group, 국제협력 Ad Hoc Group2004. 3: TTA Phase-I 표준초안채택2004. 6 : TTA Phase-I 규격승인2004. 12 : TTA Phase-I 규격의 IEEE 802.16규격과의호환성유지를위한 1단계규격수정안승인2005. 1Q : TTA Phase-II 규격의요소기술제안및평가2005. 2Q : TTA Phase-II 규격승인목표2005. 1 : TTA 무선접속실무반내에 IOT/CT Task Force 구성2005. 1Q-2Q : IOT Basic Profile 작성2005. 3Q : RCT Specification 작성2005. 3Q : IOT Specification 작성2005. 4Q : 사업자/TTA 중심으로시험규격작성및 CT 진행

-5-HSN’06 (2006-02-24)

2. 2. WiBroWiBro 시스템시스템 개요개요

-6-HSN’06 (2006-02-24)

WiBro System ArchitectureWiBro System Architecture

HA

RAS

PSS PSS

Uh

Mobile IP

ACR

FA

AAA

PSS: Personal Subscriber StationRAS: Radio Access StationACR : Access Control RouterNMS: Network Management System

NMS(O&M)

Public IP Network

RAS

ACR

W-LAN

PSS

W-LAN AP

Service provider’sIP Network

Uh

Ah Ah

Ih

Ph

IhInterface Reference Point

Uh : PSS-RAS (Defined in WiBro Specification)Ah : RAS-ACRPh : ACR-ACR Ih : ACR-INTERNET

Inter RAS HandoverInter ACR Handover

Seamless handover (if MIP supported)

PSS = MSS/MS in 802.16eRAS + ACR = BS in 802.16e

-7-HSN’06 (2006-02-24)

Protocol Layer StructureProtocol Layer Structure

Service SpecificConvergence Sublayer

(CS)

MAC Common Part Sublayer(MAC CPS)

Privacy Sublayer

Physical Layer(PHY)

PHY SAP

MAC SAP

CS SAP

MAC

PHY

Service Specific Convergence Sublayer (CS)Transformation or mapping of external network dataReceived through the CS SAP into MAC SDUs received by the MAC CPS through the MAC SAP.This includes classifying external network SDUs and associating them to the proper MAC service flow and CID. Payload header suppression.

The MAC CPSCore MAC functionality of system access, Bandwidth allocationConnection establishmentConnection maintenanceClassified to particular MAC connections.Quality of Service (QoS)Scheduling of data over the PHY.

Privacy SublayerProviding authenticationSecure key exchangeEncryption.

-8-HSN’06 (2006-02-24)

MAC PDU ConstructionMAC PDU Construction

Packet PDUPHSI

MAC SDU MAC SDUMAC SDU #1

MAC SDU #2

PackingSub-header

MAC Header MAC SDU CRC

MAC Header MAC SDU

MAC SDU MAC SDU

PackingSub-header MAC SDU

FragmentationSub-headerMAC Header MAC SDU f1

FragmentationSub-headerMAC Header MAC SDU f2

BR Header

Bandwidth Request PDU

MAC HeaderManagement Message Type

MAC ManagementPayload

Management PDU

MAC PDU

MAC PDU MAC PDU

MAC PDU

MAC PDU

Fragmentation

Packing

User PDU

Packet PDUPHSI

-9-HSN’06 (2006-02-24)

Usage of MAP & Dedicated Feedback ChannelsUsage of MAP & Dedicated Feedback Channels

Transmission InformationChannel

Downlink Frame Uplink FrameTx. Period

Every Frame

Every Frame

If supported, appear in every

frame

Sub-DL-UL MAP User Data Burst Allocation If needed, …. MAP AMC

Support

Traffic Burst Traffic/Messages Traffic/Messages -Diversity/

Band AMC

ACKCH H-ARQ Ack - Implicit

Periodic

Remarks

FCH Frame Control Header

-

General MAP pointing

Normal MAP General MAP information

Channel Quality

Sub-DL-UL MAP Pointing

Ranging Codes

Normal MAP Extension for

HARQ

User Data Burst Allocation

Same AMC with Normal MAP

CQICH If allocated

Ranging CH Uplink synchronization

-10-HSN’06 (2006-02-24)

Ranging and Bandwidth RequestRanging and Bandwidth Request

Messaging 방식 CDMA 방식

Contention-based × Contention-based Ο1

Unicast-polling × Unicast-polling ×

Contention-based × Contention-based Ο2

Unicast-polling Ο Unicast-polling ×

Contention-based × Contention-based Ο3

Unicast-polling Ο Unicast-polling ×

Bandwidth Request

Periodic Ranging

Initial Ranging/Handover Ranging

Ο1: CDMA-based Ranging (status = success인 RNG-RSP 수신) 후, CDMA_Allocation_IE에할당된 UL 구간으로 RNG-REQ (with MAC Address) 메시지전송

Ο2: CDMA-based Ranging 절차만계속 (status = success가될때까지)Ο3: CDMA-based Bandwidth Request용 Code 전송후,

CDMA_Allocation_IE에할당된 UL 구간으로 BW Request Header and/or UL Data 전송* Handover Ranging은 Initial Ranging과같은성격인별도의 Code set를사용하는 Ranging.

-11-HSN’06 (2006-02-24)

Initial Ranging Procedures (Example)

주의) 각 message의전송타이밍이특정프레임을지정하는것은아님

-12-HSN’06 (2006-02-24)

WiBroWiBro MAC MAC 규격규격요소요소기술기술검토검토

Sleep ModeBasic Sleep Mode Operation ConceptExtended Sleep Mode Functions

Idle Mode/Paging/Location UpdateDe-registration Procedure Idle Mode Entering ProcedureFast Network Re-entry

MBS ServiceMBS ServerMBS Security

Handover/FBSSFast Handover ARQ Problem during Handover

Effective PHY Control HARQAASMIMO

-13-HSN’06 (2006-02-24)

3. 3. WiBroWiBro Evolution IssuesEvolution Issues

HSN’06 (2006-02-24)

WiBroWiBro시스템의시스템의응용응용

-- MultiMulti--Hop RelayHop Relay

-15-HSN’06 (2006-02-24)

Mobile MultiMobile Multi--hop Relay (MMR)hop Relay (MMR)

PurposeCoverage ExtensionThroughput Enhancement

InterfaceRS<>BS : IEEE 802.16e (No modification of MS functionalities and interface)BS<>RS : MMR-enhanced IEEE 802.16e

RS: Relay StationRS: Relay Station

-16-HSN’06 (2006-02-24)

Mobile MultiMobile Multi--hop Relay (MMR)hop Relay (MMR)

RS TypesFixed Relay: 고정설치됨.Nomadic Relay: 행사장등에임시적으로설치되어운용됨.Mobile Relay: 버스, 기차등에설치되어이동함.

-17-HSN’06 (2006-02-24)

Mobile MultiMobile Multi--hop Relay (MMR)hop Relay (MMR)

HSN’06 (2006-02-24)

WiBroWiBro EvolutionEvolution의의경쟁자경쟁자

-- 3GPP3GPP--LTELTE-- IEEE 802.20IEEE 802.20

-19-HSN’06 (2006-02-24)

3GPP LTE3GPP LTE

3GPP LTE Objective [TR 25.913]To develop a framework for the evolution of the 3GPP radio-access technology Towards

high-data-ratelow-latencypacket-optimized

3GPP LTE ScopeL1 (PHY)

Flexible BW up to 20 MHz,New transmission schemesMIMO

L2&L3Signaling optimization

RAN architectureRAN OptimizationFunctional split between CN and RAN

RF-related issues

-20-HSN’06 (2006-02-24)

3GPP LTE3GPP LTE

3GPP LTE TargetsReference antenna configuration

LTE: DL 2x2, UL 1x2HSDPA: DL 1x1, UL 1x1

Spectrum deploymentBoth paired and unpaired (FDD and TDD)Possibility of standalone operation

Scalable bandwidth5, 10, 15 ,20 MHz 1.25, 2.5 MHz considered

Peak data rateDL: 100 Mbps/20 MHz (5 bps/Hz) with 2 rx ant at UE UL: 50 Mbps/20 MHz (2.5 bps/Hz) with 1 tx ant at UE

Bandwidth (MHz) 1.25 2.5 5.0 10.0 15.0 20.0

DL peak rate (Mbps) 6.25 12.5 25 50 75 100

UL peak rate (Mbps) 3.125 6.25 12.5 25 37.5 50

-21-HSN’06 (2006-02-24)

3GPP LTE3GPP LTE

3GPP LTE TargetsLatency

User-plane latency (UE – Base) ≤ 5 ms (unload, small IP packet)C-plane latency (Idle Active) ≤ 100 ms

Cell capacityAt least 200 active users per cell at 5 MHzAt least 400 active users per cell at higher BW (> 5 MHz)

User throughputEdge user throughput per MHz (5% CDF)

– 2~3 times HSDPAAverage user throughput per MHz

– 3~4 times HSDPASpectrum efficiency [bits/sec/Hz/site]

DL: 3~4 times HSDPAUL: 2~3 times HSDPA

-22-HSN’06 (2006-02-24)

3GPP LTE3GPP LTE

3GPP LTE TargetsMobility

0 ~ 15 km/h: Optimum performance15 ~ 120 km/h: High performance120 ~ 300 km/h: Functional300 ~ 500 km/h: Functional (depending on frequency band)Real time (voice) service quality: LTE PS-domain quality = R6 CS-domain quality

CoverageUp to 5 km: All performance targets should be met.Up to 30 km

– User throughput target: slight degradation– Spectrum efficiency target: significant degradation – Mobility target: satisfied

Up to 100 km: not precludedService requirements

Internet services: web-browsing, FTP, video-streaming, VoIPMore advanced services: real-time video or push-to-xEnhanced MBMS

-23-HSN’06 (2006-02-24)

3GPP LTE3GPP LTE

3GPP LTE Work PlanRAN#30 agreements

Multiple Access: DL OFDMA, UL SC-FDMAUplink macro diversity: Not inter-NodeB, But intra-NodeB

2006.06: Study Item completed (TR)2007.06: Work Item completed (TS)

RAN#31, 8-10 March, ChinaRevised work plan Working assumption on complete

conceptMultiple access scheme− Channel structure− MIMO scheme to be used for

evaluation− Signalling procedures− Mobility details

RAN#31, 8-10 March, ChinaRevised work plan Working assumption on complete

conceptMultiple access scheme− Channel structure− MIMO scheme to be used for

evaluation− Signalling procedures− Mobility details

RAN#30, 30 Nov-2 Dec, MaltaRevised work planRAN Architecture including RAN

migration scenariosStates and state transitionsPhysical Layer Basics−Multiple access scheme−Macro-diversity or not−RF Scenarios−Measurements

RAN#30, 30 Nov-2 Dec, MaltaRevised work planRAN Architecture including RAN

migration scenariosStates and state transitionsPhysical Layer Basics−Multiple access scheme−Macro-diversity or not−RF Scenarios−Measurements

RAN#32, 31 May- 2 June, TBDConcept TR for approval− TR having Stage 2 level of

details in order for smooth transition to Work Item phase

RAN#32, 31 May- 2 June, TBDConcept TR for approval− TR having Stage 2 level of

details in order for smooth transition to Work Item phase

RAN#29, 21-23 Sept, TallinRevised work planRAN-CN functional split agreed − RAN-CN migration scenarios

included

RAN#29, 21-23 Sept, TallinRevised work planRAN-CN functional split agreed − RAN-CN migration scenarios

included

RAN #27, 9-11 March, Tokyo•Work plan agreed•TR Structure agreed•1st list of requirements

RAN #27, 9-11 March, Tokyo•Work plan agreed•TR Structure agreed•1st list of requirements

RAN #28, 1-3 June, Quebec•Revised Work plan•Requirement TR approved

−deployment scenarios included−requirements on migration scenarios included

RAN #28, 1-3 June, Quebec•Revised Work plan•Requirement TR approved

−deployment scenarios included−requirements on migration scenarios included

Mar Apr May Jun MarJul Aug Sep Oct Nov Dec Jan Feb

2005 2006

JunApr May

HSN’06 (2006-02-24)

IEEE 802.20 Requirements and OverviewIEEE 802.20 Requirements and Overview

-25-HSN’06 (2006-02-24)

802.20 Requirements802.20 Requirements

Characteristic Target value

Mobility Vehicular mobility classes up to 250 km/hr (as defined in ITU-R M.1034-1)

Sustained spectral efficiency > 1 b/s/Hz/cell

Peak user data rate (DL/UL) > 1 Mb/s* DL; > 300 kb/s* UL

* Targets for 1.25 MHz Channel BW (FDD).

Peak aggregate data rate/cell (DL/UL) > 4 Mb/s* DL; > 800 kb/s* UL

Peak user data rate (DL/UL) > 1 Mb/s* DL; > 300 kb/s* UL

Airlink MAC frame RTT < 10 ms

Bandwidth 1.25 MHz/5 MHz/10MHz/15MHz/20MHz

Spectrum < 3.5 GHz TDD/FDD

Cell Sizes Appropriate for ubiquitous MAN & capable of reusing existing infrastructure

-26-HSN’06 (2006-02-24)

802.20 Overview (1)802.20 Overview (1)

Adaptive coding and modulation w/ H-ARQ and turbo codingShort retransmission latency

Approximately 5.5 ms on Forward and Reverse Link

OFDMA Forward Link w/ MIMO supportsingle codeword MIMO with closed loop rate & rank adaptationmulti-codeword (layered) MIMO w/ per-layer rate adaptationPeak-rate over 260 Mb/s in 20 MHz (FDD)

Quasi orthogonal Reverse Link orthogonal transmission based on OFDMAnon-orthogonal transmission w/ multiple receive antennasCDMA control channels

Interference management through fractional frequency reuseimproved coverage & edge user performancedynamic fractional frequency reuse to optimize bandwidth utilization

Source: Qualcomm’s Contribution Material to IEEE 802.20 (IEEE C802.20-05-59r1)

-27-HSN’06 (2006-02-24)

802.20 Overview (2)802.20 Overview (2)

Optimized throughput/fairness tradeoff through power controlDistributed power control based on other cell interference

Forward Link precoding & SDMAMISO/MIMO closed loop precoding with low-rate feedbackCombined precoding and space division multiple access

Subband schedulingEnhanced performance on Forward & Reverse LinkMulti-user diversity gains for latency sensitive traffic

CDMA Reverse Link control segmentStatistical multiplexing of various Reverse Link control channelsFast access with reduced overhead and fast requestBroadband reference for power control and subband schedulingEfficient handoff support

Scalable design w/ an arbitrary bandwidth within 5 – 20 MHz

Source: Qualcomm’s Contribution Material to IEEE 802.20 (IEEE C802.20-05-59r1)

HSN’06 (2006-02-24)

WiBroWiBro Evolution Standardization RoadmapEvolution Standardization Roadmap

-29-HSN’06 (2006-02-24)

WiBroWiBro Evolution StandardizationEvolution Standardization

WiBro Evolution의목표WiBro상용화이후의실현가능한 Evolution Path를제시WiBro상용시스템의 Reusability 극대화경쟁기술 (IEEE 802.20, 3GPP-LTE 등) 대비성능의우수성을담보할수있는규격의개발

표준화완료및상용화시점은경쟁기술과비슷한시기에달성

성능목표:고속이동성지원: ~ 300 km/hr가변대역폭지원: 10/20/40 MHz Scalable 대역폭지원전송효율: ~ 10 b/s/Hz/cellOverhead 비율: 경쟁기술대비동등또는저감 (~ 35% total)

-30-HSN’06 (2006-02-24)

Standardization StrategyStandardization Strategy-- WiBroWiBro기술기술분류분류

WiBroPower Saving

Handover

Multicast/BroadcastService

ControlProtocol

Security/Authentication

Modem Channel Coding

Air Interface/Packet Scheduling

WiBro Evolution

Performance Enhancement/Optimized Profile Selection/

Network Integration

Multiple Antenna

High Speed Mobility Support IPv6 Adaptation

Coexistence/Cooperation with Unlicensed Band

-31-HSN’06 (2006-02-24)

Standardization StrategyStandardization Strategy-- WiBroWiBro연관연관기술기술관계도관계도

WiBroMobile IP

HSDPA/HSUPA

Telematics

MBWA (IEEE 802.20)

Wireless LAN(IEEE 802.11)

3GPP-LTE

IMS

IEEE 802.21(Hetero. Network HO)

IPv6

-32-HSN’06 (2006-02-24)

Standardization StrategyStandardization Strategy--표준화표준화추진추진체계체계

WiBro Forum (가칭) (제조업체/사업자 중심)

정부/연구소/학계

TTA PG302(휴대인터넷프로젝트그룹)

WiMax Forum (제조업체/사업자 참여)

IEEE 802.16m (가칭)(WiBro Evolution)

-33-HSN’06 (2006-02-24)

WiBroWiBro Evolution Standardization RoadmapEvolution Standardization Roadmap--주요주요표준화표준화항목항목도출도출

현재현재 표준화표준화 완료완료 단계에단계에 있는있는 IEEE 802.16eIEEE 802.16e를를 기반으로기반으로 WiBroWiBro 상용화를상용화를 추진하며추진하며, 3GPP, 3GPP--LTE LTE 대비대비 경쟁력경쟁력을을 확보하는확보하는 것을것을 목표로목표로 하는하는 WiBroWiBro EvolutionEvolution의의 표준화표준화 항목을항목을 도출한다도출한다. .

-- 국내국내 표준화를표준화를 우선하여우선하여 추진하며추진하며, , 구체적인구체적인 실제실제 시스템에의시스템에의 운용운용 결과를결과를 바탕으로한바탕으로한 사실상의사실상의 국제국제 표표준화를준화를 주도하는주도하는 것을것을 목표로목표로 한다한다. .

중점표준화대상항목 국내산업계경쟁력

Throughput 증대기술 Smart Antenna (SDMA 포함), MIMO 등다중안테나기술, LDPC 등을통한개선된채널코딩기술, 2K-FFT로의 Scalability 적용기술등확보

셀경계에서의간섭제거기술WiBro상용화를통한다양한간섭제거및페이딩극복기술을통한셀경계에서의간섭제거를통한전송율향상기술의구현기술확보

MAC 제어성능향상및오버헤드저감기술

실제운용을 통한 MAC 제어기법의최적화및오버헤드저감기술확보

IPv6를고려한고속이동성제공기술

국내 IPv6 관련기술은세계최고수준이며, IPv6 망이가장먼저상용화될것으로예측됨. 이를바탕으로 IPv6 망과의연동, 고속이동성제공기술의표준화및개발주도가능

Unlicensed/Licensed Band에서의상호연계운용기술

WiBro망의상용화를촉진하고장비시장을확대하기위한 Unlicensed/Licensed 상호연계운용기술은새로운개념의 convergence를가능하도록할것임. 국내및국외모두이에관련한기술은초기단계로봄.

-34-HSN’06 (2006-02-24)

WiBroWiBro Evolution Standardization Roadmap (Evolution Standardization Roadmap (안안))WiBroWiBro 33개년개년 표준화로드맵표준화로드맵(2006~2009)(2006~2009)

2006 2007 2008 2009이후 표준화추진전략목표

Unlicensed/Licensed 상호보완 및

적용 기술

국제표준선도

WiBroEvolution PHY/MAC 성능 개선

기술

중점표준화항목

Ver2.0 국내 표준완성

법규/정책마련 국제표준완료

Wibro Evolution PHY/MAC 성능 개선 기술 ●

Ver1.0 국내표준완성

Unlicensed/Licensed 상호 보완 및 적용 기술 ◑

[범례] : 국내 기술개발 : 국내 표준개발 세부기술 중요도 : ●상 ◑중○하

: 국외 기술개발 완료 : 국외 표준개발 완료

국제표준경쟁/협력

국제표준추진(IEEE 802.16m (가칭))

국내 개발 완료

Ver1.0 국내표준완성 Ver2.0 국내표준완성

-35-HSN’06 (2006-02-24)

Q & AQ & A

“Thank you for your kind attention!!”csyoon@etri.re.kr