introduction to wibro technology - itu · 2010-03-08 · soon young yoon telecom r&d center...
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Soon Young YoonSoon Young Yoon
TTelecom R&D Centerelecom R&D CenterSamsung Electronics Co, Ltd.Samsung Electronics Co, Ltd.
Introduction to
WiBro TechnologyIntroduction toIntroduction to
WiBro TechnologyWiBro TechnologySeptember 10, 2004September 10, 2004
© SAMSUNG Electronics Co., Ltd. 1/25
ContentsContents
Background of WiBro Service
WiBro Technology Overview
Future Plan and Strategy
Background of WiBro Service
WiBro Technology Overview
Future Plan and Strategy
© SAMSUNG Electronics Co., Ltd. 2/25
Background of WiBro ServiceBackground of WiBro Service
© SAMSUNG Electronics Co., Ltd. 3/25
Subscribers TrendSubscribers Trend
Market Trend in Korea (1)Market Trend in Korea (1)qq Korea Telecommunication Market TrendKorea Telecommunication Market Trend
u 2001-2003 subscriber growth rate
Ø Fixed BB(44%) > Mobile internet(30%) > Mobile phone(16%) > Fixed phone(2%)
u Voice market is saturated (fixed phone) or slowly growing (mobile phone)
u Data market (mobile internet & fixed BB) is growing faster than voice
Source : KISDI (Korea Information Strategy Development InstituteSource : KISDI (Korea Information Strategy Development Institute) ) ? Number of mobile phone users includes mobile internet users
0
5
10
15
20
25
30
35
40
1997 1998 1999 2000 2001 2002 2003
Sub
scrib
ers
[Mill
ion]
Mobile Phone Fixed PhoneMobile Internet Fixed Broadband
© SAMSUNG Electronics Co., Ltd. 4/25
Market Trend in Korea (2)Market Trend in Korea (2)
qq Mobile Data ARPU Mobile Data ARPU (2003 Dec. SKT user basis)(2003 Dec. SKT user basis)
u As network evolves, data ARPU potion increases
u Data rate is one of the key factor to increase data ARPU
u Data ARPU is expected to keep increasing as the market churns
Source : SKT IR Data, 2004Source : SKT IR Data, 2004
*Total ARPU is net of interconnection fees and signup fees*Data ARPU = Wireless Internet revenues including phone mail revenue / internet user
ARPU by Handset TypeARPU by Handset Type
9% 10%
60%
21%
1x EV-DO (MMS support)
1x EV-DO
1x RTT
95A/B
User PotionUser Potion$56.74
$47.19
$33.68
$21.54$19.50
$12.64
$4.52$1.21
$0.00
$10.00
$20.00
$30.00
$40.00
$50.00
$60.00
1x EV-DO(MMS support)
1x EV-DO 1x RTT 95A/B
AR
PU
$1 = 1,150 won
34%
27%13% 6%
Total ARPUData ARPU
ARPU : Average Revenue Per UserARPU : Average Revenue Per User MMS : Multi Media ServiceMMS : Multi Media Service
© SAMSUNG Electronics Co., Ltd. 5/25
Needs for WiBro Service Needs for WiBro Service
qq WLAN (IEEE 802.11 series) WLAN (IEEE 802.11 series) u Support very high data rate but limited coverage and mobility not
supported
qq Cellular (cdma2000 1X, 1xEVCellular (cdma2000 1X, 1xEV--DO, WCDMA) DO, WCDMA) u Support large coverage and fast mobility but data rate is low and too
expensive
Limit of Existing TechnologiesLimit of Existing Technologies
QoS
Mobility Service Charge
Data Rate
Coverage
WiBro
WLAN
Cellular
Technology Comparison Technology Comparison
© SAMSUNG Electronics Co., Ltd. 6/25
Service Position in Network EvolutionService Position in Network Evolution
qq WiBro is now located between WLAN and Cellular service. WiBro is now located between WLAN and Cellular service.
qq In the future, WiBro service will evolve to 4G Network which In the future, WiBro service will evolve to 4G Network which provide higher data rate and mobilityprovide higher data rate and mobility
High Quality Multimedia Video Streaming
Voice Text ImageGraphic
Video Data Rate
4GServices2G 3G
CordlessPhone
19919966 20002000 20052005 20102010
CellularPCS
CDMAWCDMA
Mobility
2.4GHzWLAN
5GHzWLAN
Stationary
Pedestrian
High
Medium WiBroWiBro
© SAMSUNG Electronics Co., Ltd. 7/25
HPi(HighHPi(High Speed Portable Internet) ProjectSpeed Portable Internet) Project
qq ETRI/Samsung ETRI/Samsung HPiHPi Project ObjectiveProject Objectiveu Development of HPi system at 2.3GHz
u HPi RTT specification & system development
qq Period: 2003.1. ~ 2005.12.Period: 2003.1. ~ 2005.12.
qq Sponsors : HTI, KT, KTF, SKT, SamsungSponsors : HTI, KT, KTF, SKT, Samsung
qq ResultsResultsu ETRI/Samsung
ØWiBro spec proposed to TTA and accepted as baseline
u ETRI
Ø Prototype system development
u Wired and wireless operatorsØRequirements definition
RTTRTT:: Radio Transmission Technology Radio Transmission Technology
© SAMSUNG Electronics Co., Ltd. 8/25
Spectrum Allocation StatusSpectrum Allocation Status
WiBro Spectrum Allocation of KoreaWiBro Spectrum Allocation of Korea
qq MIC allocated 2.3GHz spectrum for WiBro services MIC allocated 2.3GHz spectrum for WiBro services (Official MIC notice, Dec. 2002) (Official MIC notice, Dec. 2002) u Frequency BW : 2.3~2.4GHz
u Purpose : WiBro (Portable Internet)
u Usage : Fixed / Mobile
WLANWLAN(83.5)(83.5)
[Unit : GHz]
WiBroWiBro(100MHz)(100MHz)
2.4 2.4835
MSSMSS(30)(30)
IMTIMT--20002000FDDFDD(60)(60)
2.3
MSSMSS(30)(30)
IMTIMT--20002000FDDFDD(60)(60)
IMT
IMT
--200
0 T
DD
2000
TD
D(3
5)(3
5)
IMT
IMT
--200
0 T
DD
2000
TD
D(1
5)(1
5)
2.22.172.112.0252.011.981.921.885
MIC : Ministry of Information and CommunicationMIC : Ministry of Information and Communication MSS : Mobile Satellite ServiceMSS : Mobile Satellite Service
IMT-2000 WiBro WLAN
© SAMSUNG Electronics Co., Ltd. 9/25
WRC : World Radiocommunication Conference ITFS : InstructiWRC : World Radiocommunication Conference ITFS : Instructional Television Fixed Service onal Television Fixed Service BRS : Broadband Radio Service BRS : Broadband Radio Service MMDS : Multichannel Multipoint Distribution SystemMMDS : Multichannel Multipoint Distribution System
KoreaKorea
ChinaChina
JapanJapan
Australia/Australia/New ZealandNew Zealand
U.S.A. U.S.A.
EuropeEurope
WRCWRC
>2.7>2.72.62.62.52.52.42.42.32.32.22.22.12.12.02.01.91.91.81.81.71.71.61.6[GHz][GHz]
3535 IMTIMT--200020001515 IMTIMT--20002000
3535 IMTIMT--20002000 IMTIMT--20002000 WiBroWiBro
IMTIMT--20002000
IMTIMT--20002000
IMTIMT--20002000
IMTIMT--20002000
GSM 2020IMTIMT--200020001515 IMT extension IMT extension reserved for TDDreserved for TDD
ITFS, BRSITFS, BRS
IMT extension IMT extension reserved for TDDreserved for TDD
IMT extension IMT extension reserved for TDDreserved for TDD
IMT extension IMT extension reserved for TDDreserved for TDD
IMT extension IMT extension reserved for TDDreserved for TDD
Future3G
PCS700Mhz700Mhz
CDMA
4040 IMTIMT--20002000GSM
IMTIMT--20002000PHS
ISM
ISM
ISM
ISM
ISM
ISM
3.4Ghz3.4Ghz
3.4Ghz3.4Ghz
3.4Ghz3.4Ghz
TDDTDD
MMDSMMDSIMTIMT--20002000
3GPP TDD Other TDD BandsIMT extension reserved for TDD
1515
1515
Global TDD Spectrum AllocationGlobal TDD Spectrum Allocation
qq Global TDD Spectrum Allocation StatusGlobal TDD Spectrum Allocation Status
u FDD band is about 3 times larger than TDD band
u More TDD band will be required
Ø For high data rate support, new systems requiring broader bandwidth etc.
© SAMSUNG Electronics Co., Ltd. 10/25
WiBro Technology OverviewWiBro Technology Overview
© SAMSUNG Electronics Co., Ltd. 11/25
System RequirementsSystem Requirements
High Data RateHigh Data Rate MobilityMobility
Low CostLow CostFull CoverageFull Coverage
qq Maximize sector/user Maximize sector/user throughputthroughput
qq Broad bandwidth Broad bandwidth
qq MAC & RRCMAC & RRC
qq Improve spectral efficiency Improve spectral efficiency
qq Reduce infra costReduce infra cost
qq Multiplexing gain of packet Multiplexing gain of packet data.data.
qq Vehicular speed mobility Vehicular speed mobility (~60km/h) (~60km/h)
qq Seamless serviceSeamless service
qq Longer battery usageLonger battery usage
qq Various types of cell Various types of cell (Macro / Micro / Pico) (Macro / Micro / Pico)
qq Easy cell planning Easy cell planning
qq Roaming with cellular & Roaming with cellular & WLAN WLAN
MAC : Medium Access Control MAC : Medium Access Control RRC : Radio Resource ControlRRC : Radio Resource Control
© SAMSUNG Electronics Co., Ltd. 12/25
FDD FDD
TDD vs. FDDTDD vs. FDD
Symmetric traffic like voiceSymmetric traffic like voicePacket base data trafficPacket base data trafficSuitable for Suitable for
Need smaller powerNeed smaller powerNeed more power (duty factor)Need more power (duty factor)For same coverageFor same coverage
NonNon--reciprocal reciprocal Reciprocal Reciprocal (Easy to apply SA, MIMO etc.) (Easy to apply SA, MIMO etc.) UL/DL ChannelUL/DL Channel
ISIS--95A/B, CDMA2000, 1xEV95A/B, CDMA2000, 1xEV--DO, DO, GSM, GPRS, WGSM, GPRS, W--CDMACDMA
WiBro, 802.16, 802.11a/b,WiBro, 802.16, 802.11a/b,TDTD--SCDMA, SCDMA, Applied system Applied system
Less efficient (Larger GB) Less efficient (Larger GB) More efficient (Smaller GB) More efficient (Smaller GB) Spectrum EfficiencySpectrum Efficiency
Guard BandGuard BandGuard TimeGuard TimeUL/DL IsolationUL/DL Isolation
F D DF D DT D DT D D
Time
Fre
q. GBGB
GBGB
GTGTDLDL ULUL
Time
Fre
q.
GBGB
GBGB
GBGBULUL
DLDL
GB : Guard BandGB : Guard Band GT : Guard Time GT : Guard Time
GTGT
TDD TDD
© SAMSUNG Electronics Co., Ltd. 13/25
PHY Spec. PHY Spec.
qq Frequency Band Frequency Band : 2.3GHz (Korea): 2.3GHz (Korea)
qq Channel Bandwidth Channel Bandwidth : : == 9MHz 9MHz
qq Duplex Duplex : TDD / 5msec frame: TDD / 5msec frame
qq Multiple Access Multiple Access : OFDMA: OFDMA
qq Modulation Modulation : QPSK, 16QAM, 64QAM : QPSK, 16QAM, 64QAM
qq Channel Coding Channel Coding : CTC: CTC
qq Cell Coverage Cell Coverage : ~1km: ~1km
qq Maximum Data Rate Maximum Data Rate u Sector throughput : DL : 18 Mbps, UL : 6 Mbps
u User throughput : DL : 3 Mbps, UL :1 Mbps
qq Optional AAS supportOptional AAS support
CTC : Convolution Turbo CodeCTC : Convolution Turbo Code AAS : Adaptive Antenna System AAS : Adaptive Antenna System
© SAMSUNG Electronics Co., Ltd. 14/25
MAC Spec. MAC Spec. qq Flexible BW Allocation by MAPFlexible BW Allocation by MAPu Frame by Frame
qq Supports flexible QoS offeringSupports flexible QoS offeringu rtPS, nrtPS, BE u Fine granularity
qq Efficient MAC PDU constructionEfficient MAC PDU constructionu Variable size MAC PDU u MAC-level framing (No PPP)u Fragmentation, packing, concatenation
qq Payload header suppression supportPayload header suppression supportqq Security supportSecurity supportqq Sleep mode supportSleep mode supportqq HH--ARQ/ARQ supportARQ/ARQ supportqq Handoff : BBMHandoff : BBMqq AMC supportAMC support
rtPS : realrtPS : real--time Polling Service time Polling Service nrtPS : nonnrtPS : non--realreal--time Polling Service time Polling Service BE : Best Effort BE : Best Effort PDU : Protocol Data Unit PDU : Protocol Data Unit HH--ARQ : Hybrid Automatic Response ReQuestARQ : Hybrid Automatic Response ReQuest BBM : Break Before Make BBM : Break Before Make AMC : Adaptive Modulation and CodingAMC : Adaptive Modulation and Coding
© SAMSUNG Electronics Co., Ltd. 15/25
PHY Characteristics (1)PHY Characteristics (1)
qq High Spectral Efficiency SupportHigh Spectral Efficiency Supportu TDD ØMinimize guard band to increase spectral efficiency
u 10 MHz BW / OFDMA ØMinimize multi-path interference to increase spectral efficiency
u Support various modulation schemes (QPSK, 16QAM, 64QAM) and CTC to maximize data rate
qq Full Coverage Support Full Coverage Support u Support cellular operation with frequency reuse factor of 1ØHigh spectral efficiency & easy cell planning
ØMinimize interference using diversity subchannel based on Reed Solomon sequence
ØCompensate low SINR at cell edge using low rate coding
u Fast handover with mobile IP
© SAMSUNG Electronics Co., Ltd. 16/25
qq Performance Enhancement considering Mobility(1)Performance Enhancement considering Mobility(1)u H-ARQ
Ø Increase the efficiency of re-transmission resulting from fading and interference
u Band selection AMC & diversity subchannel
ØMobile stations request to select band selection AMC or diversity subchannel by monitoring channel status
Ø For slowly moving users : allocate band selection AMC subchannels which have high quality channel response to increase transmission efficiency and coverage
Ø For fast moving users : allocate diversity subchannels distributed over whole frequency band to maximize frequency diversity
PHY Characteristics (2)PHY Characteristics (2)
© SAMSUNG Electronics Co., Ltd. 17/25
qq Performance Enhancement considering Mobility(2)Performance Enhancement considering Mobility(2)u Support 60km/h mobility
ØMinimize distortion due to mobility using short OFDM symbol
Ø Apply pilot structure supporting channel estimation while moving
u Support fast access during hand-off
Ø Apply short frame length (5msec) for fast response
Ø Apply additional non-contention based control channel access duration
PHY Characteristics (3)PHY Characteristics (3)
© SAMSUNG Electronics Co., Ltd. 18/25
PHY Characteristics (4)PHY Characteristics (4)
qq Flexible Resource Allocation for Multiple UsersFlexible Resource Allocation for Multiple Usersu Asymmetric DL / UL allocation
ØDL/UL : 2:1, 1:1, 5:1
u Multiple user acceptance
Ø Support different packet scheduling algorithm and status management for each type of mobiles
qq Support Portability Support Portability u Support sleep mode to decrease handset consuming power
qq TDD Adaptive Antenna System (Optional)TDD Adaptive Antenna System (Optional)u Increase coverage and data rate for slowly moving users
PDU : Protocol Data Unit PDU : Protocol Data Unit PPP : Point to Point Protocol PPP : Point to Point Protocol
© SAMSUNG Electronics Co., Ltd. 19/25
MAC CharacteristicsMAC Characteristics
qq Scheduler Design ConsiderationScheduler Design Considerationu Adaptive modulation & coding u QoS guarantee
u Throughput maximization u Fairness
u Power constraint of mobiles u Scheduling algorithm complexity
qq QoS Classes in WiBroQoS Classes in WiBro
Best effort Best effort serviceservice
Non real time Non real time polling service polling service
Real time polling Real time polling service service
QoS ClassQoS Class
FTP, WWW,
E-mail• No minimum service level
FTP, WWW
• Variable-sized packet
• Delay-tolerant data stream
• Minimum data rate is required
MPEG Video,
Video telephony
• Periodic interval
• Variable-sized packet
• Real time data stream
ApplicationApplicationData type Data type
© SAMSUNG Electronics Co., Ltd. 20/25
WiBro Network ArchitectureWiBro Network Architecture
Internet
RAS
Macro-cell
RAS
PSTN/PLMN
Internet
IMS
BR
AR
3G RAN
ACR
NodeB/BTS
AP
802.11xWLAN
RNC/BSC
3G MS
GSN/PDSN
AP
AAA
MIP HA
CN
Hot Spot WiBro
AcronymsAcronyms
AAA Authentication, Authorization and Accounting
ACR Access Control RouterAR Access RouterBR Border RouterGSN GPRS Support NodeHA Home AgentIMS IP Multimedia Sub-systemPDSN Packet Data Serving NodeRAS Radio Access Station
© SAMSUNG Electronics Co., Ltd. 21/25
Network Element FunctionsNetwork Element Functions
ACRACR RAS RAS
q Packet classification & header suppression
q Service flow management
q Traffic switching & integration point
q Handover management
q Session information maintenance
q RAS interface
q Core network interface
q PHY processing and air resource scheduling
q MAC management message processing
q MAC PDU processing
q CID management
q Encryption & Decryption
q ACR interface
PDU : Protocol Data Unit PDU : Protocol Data Unit CID : Connection IDCID : Connection ID
© SAMSUNG Electronics Co., Ltd. 22/25
Future Plan and StrategyFuture Plan and Strategy
© SAMSUNG Electronics Co., Ltd. 23/25
WiBro Policy of KoreaWiBro Policy of Koreaqq Standard Standard
u Based on IEEE 802.16-2004 & 802.16e Draft3 or later version satisfying: Ø Downlink 512kbps, uplink 128kbps at 60Km/hØ Channel badwidth >9MHz Ø Roaming between operator equipmentØ TDDØ Frequency reuse factor 1
qq Service Provider SelectionService Provider Selectionu Number of service provider : 2~3u Frequency usage period : 7 years u MVNO, NO-SP separation considered
Source : MICSource : MICMVNO : Mobile Virtual Network Operator NO : Network OperatorMVNO : Mobile Virtual Network Operator NO : Network Operator SP : Service ProviderSP : Service Provider
2004. 92004. 9 2005. 22005. 2
Complete service provider Complete service provider selection policyselection policy
Service providerService providerselectionselection
20062006
Commercial serviceCommercial service
Time Schedule Time Schedule
© SAMSUNG Electronics Co., Ltd. 24/25
WiBro Mobile Station Development Strategy WiBro Mobile Station Development Strategy
qq WiBro Mobile Development Strategy WiBro Mobile Development Strategy u Develop low price mobile phones for public users u Develop high mobility support mobile phones for enterprise usersu Support existing services (Develop dual mode type)u Develop notebook internal type or card type in early market u Move to PDA or handheld type as market matures
qq Survey Result of WiBro DemandSurvey Result of WiBro Demand
q 95%q 78%Needs for service continuity Needs for service continuity with existing oneswith existing ones
q Notebook typeq PDA
q Handheld type ? Early adopters prefer
notebook type
Preferred type of Preferred type of mobile stationmobile station
q Fixed amountPreferred Service charge Preferred Service charge policypolicy
q Mobilityq Cheap service charge and phone
Most important benefitMost important benefit
Enterprise UsersEnterprise UsersPublic UsersPublic Users
Source : KISDI, 2003Source : KISDI, 2003
© SAMSUNG Electronics Co., Ltd. 25/25
WiBro System Development Strategy WiBro System Development Strategy
qq TimeTime--toto--market Development of Standardized market Development of Standardized SystemSystemu Proof of Concept development through HPi project
qq Capacity Enhancement Technology Adoption Capacity Enhancement Technology Adoption u MIMO / AAS / Space time coding adoption
u Increase the throughput of slowly moving users using UL/DL reciprocal channel characteristics of TDD system
u Key technology development and TTA phase 2/IEEE802.16e standardization
qq Alternative Low Price Solution Development for Alternative Low Price Solution Development for Enterprise or Household Users Enterprise or Household Users u Standardize the configuration applying low power amplifier or
looser RF spec to reduce network deployment cost
© SAMSUNG Electronics Co., Ltd. 26/25
Appendix. Technology Comparison Appendix. Technology Comparison
IEEE 802.11x
3GPP23GPP3GPPTTA & 802.16eStandardization
Home/Enterprise
PublicPublicPublicPublic/
EnterpriseTarget Market
TDDFDDFDDTDDTDDDuplex
SmallLargeLargeMidMidCoverage
Mid
OFDMA
= 9MHz
DL : 18.4Mbps
UL : 6.1Mbps
WiBroWiBro
Mobility
Multiple Access
Bandwidth
Peak Data Rate
LowHighHighHigh
CSMA/CACDMATDMA, CDMATDMA, CDMA
20MHz1.25MHz5MHz5MHz(10MHz)
802.11b : 11Mbps
802.11a,g :54Mbps
DL :3.1MbpsUL :1.2Mbps
DL : 14MbpsUL : 2Mbps
DL : 3.1MbpsUL : 900Kbps
EVEV--DODOHSDPAHSDPATDTD--CDMACDMAWLANWLAN
3G Standard3G Standard
CSMA : Carrier Sense Multiple AccessCSMA : Carrier Sense Multiple Access CA : Collision Avoidance CA : Collision Avoidance
© SAMSUNG Electronics Co., Ltd. 27/25
Q & ATelecom R&D Center
SAMSUNG ELECTRONICS Co, Ltd.
soon.young.yoon@samsung.com
Q & AQ & ATelecom R&D CenterTelecom R&D Center
SAMSUNG ELECTRONICS Co, Ltd.SAMSUNG ELECTRONICS Co, Ltd.
soon.young.yoon@samsung.com soon.young.yoon@samsung.com
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