2001.6 두루넷 정찬형
차례 5GHz 무선인터넷서비스 5GHz Service Application Broadband Wireless Features Mobile & Fixed Wireless Network 5GHz Technology HIPERLAN/2 IEEE 802.11a IEEE 802.16 5GHz 주요장비 부품벤더 장비벤더 5GHz 서비스추진동향 유럽 미국 국내결론 2
5GHz 무선인터넷서비스 Services Desktop PC High speed internet (1~54Mbps) for residential or SOHO Notebook Broadband mobile internet (1~54Mbps) for PDA, NotePC users Providing Mobile IP, roaming Internet Phone Internet phone by VOIP Designed for QoS support Multimedia Video Service IP based multimedia service IP based MPEG, MP3, Video conference T-LAN, Home PNA, LAN, xdsl, WLAN Link service with multi tenant Interconnection with xdsl, WLAN, Home LAN solution 512K,T1,E1 Leased Line Leased line service for Business, 512K, T1/E1 Service 3
5GHz 무선인터넷서비스 5GHz Service Application Anytime Home Airport Office Roaming Hotel & Conference Anywhere Train station Public space Outdoors 4
5GHz 무선인터넷서비스 5GHz Service Application Emerging applications Always best connected Wireless Local Area Network Wireless Wide Area Network Wireless Personal Area Network 5
5GHz 무선인터넷서비스 Broadband Wireless Features Streaming audio & video 20-30 Mbps Real time Home Gateway High effective throughput Up to 54 Mbps (gross) Up to 43 Mbps (net) Handles real-time services Streaming video & voice IEEE802.1p, UMTS, IEEE1394,... Supports several networks Ethernet, UMTS, IEEE1394,... Low power consumption Power control & sleep modes Plug and play Dynamic frequency selection Internet access Real Time 1~10Mbps Video games Real time 5-10 Mbps 6
5GHz 무선인터넷서비스 Mobile & Fixed Wireless Network Fixed Network 5GHz WA Backbone Network Fiber BS BS WA BS WA Mobile Network 7
5GHz 무선인터넷서비스 Wireless Market 8
5GHz Technology RLAN IEEE 802.11a HIPERLAN/2 5GHz FWA IEEE 802.16a/b 9
5GHz Technology What is HIPERLAN/2? 현존망과 Seamless 한접속제공 기존 LAN (Ethernet) IP base Network ATM Plug & play radio network OFDM(Orthogonal Frequency Division Multiplex) DFS(Dynamic Frequency Selection) TPC(Transmission Power Control) Link Adaption Connection oriented Network TDMA/TDD QoS Support Mobility support Security, authentication & encryption 10
5GHz Technology HIPERLAN/2 Protocol Stack 11
5GHz Technology HIPERLAN/2 Convergence Layer 12
5GHz Technology HIPERLAN/2 Characteristics OFDM Physical layer Link Adaption 5GHz spectrum Centrally controlled load adaptive TDMA/TDD 5150 5250 5350 5470 Frequency (MHz) 65725 Mbps, r=1/2 BPSK 9 Mbps, r=3/4 BPSK 12 Mbps, r=1/2 QPSK Unlicensed frequency bands for WLAN in 18 5GHz. Mbps, Benign r=3/4 interference QPSK situation to be expected compared with the 27 ISM Mbps, bands r=9/16 in 2.416QAM GHz. f BCCHFCCH RFCH Downlink data20 MHz Uplink 36 data Mbps, RACH r=3/4 16QAM Spectrum globally available. 54 Mbps, r=3/4 64QAM - 5150-5250 Europe, North America, Japan 64 points FFT: - 5250-5350 Europe, North America 48 data sub carriers - 5470-5725 Europe 4 pilots 12 virtual sub carriers DC component 0 Guard interval 800 ns 13
5GHz Technology HIPERLAN/2 Characteristics Encryption and authentication Ad-hoc network Prioritised traffic Dynamic Frequency Select Power saving Handover Mobile Terminal (MT) MAC Frame with Central Controller Encryption Broadcast period Initialisation Downlink Phase vector generation Terminal B Terminal A small delay medium delaydes 56 bits key Seed conveyed in FCH concatenated with 12 LSB of PDU number Mobile Terminal (MT) encryption MAC Frame PlaintextFrame Control Ciphertext Channel Fixed network MAC frame Decryption Radio Plug and Play Plaintext: 54 bytes PDU including CRC Transceiver Turn-around Interval Seed conveyed in FCH concatenated with 12 LSB of PDU number Uplink Phase Initialisation vector generation 56 bits key Ciphertext DES Random encryption Access Time Access Point (AP) time Plaintext Time 14
5GHz Technology IEEE 802.11 Features Frequency band : 2.400~2.483.5GHz Data Rate : 1,2,5.5,11 Mb/s Modulation : CCK MAC : CSMA/CA Max Power : EIRP 1W(FCC 15.247) More Throughput More Bandwidth Frequency band : 5.15~5.35GHz, 5.725~5.825GHz Data Rate : 6,9,12,18,24,36,54 Mb/s Modulation : OFDM MAC : CSMA/CA Max Power : 200mW,1W,4W 15
5GHz Technology IEEE 802.11a PHY 16
5GHz Technology IEEE 802.11a MAC Features Asynchronous MAC Distributed control Connectionless Out-of-band ARQ signaling (fast ARQ) Disadvantages No QoS support for isochronous traffic No security Lack of robustness 17
5GHz Technology HIPERLAN/2 vs. IEEE 802.11a Characteristic HIPERLAN/2 IEEE 802.11a Modulation OFDM OFDM Frequency band 5.15~5.35GHz 5.470~5.725GHz 5.15~5.25GHz 5.725~5.825GHz Max. Throughput 54Mbps 54Mbps MAC TDMA/TDD CSMA/CA Connectivity Connection-Oriented Connection-less QoS Support ATM/802.1p/RSVP/ DiffServ(full control) PCF (Point Connection Function) Authentication NAI/IEEE Address/X.59 No Network Support Ethernet, IP, ATM, UMTS, Fire Wire, PPP Ethernet Management HIPERLAN/2 MIB 802.11 MIB Radio Link quality Control Link Adaptation No 18
5GHz Technology HIPERLAN/2 vs. IEEE 802.11a 19
5GHz Technology HIPERLAN/2 vs. IEEE 802.11a 20
5GHz Technology IEEE 802.16 802.16 Air Interface for 10-66 GHz (Task Group 1). 802.16a Licensed Frequencies, 2-11 GHz (Task Group 3) 802.16b License-Exempt Bands, with a focus on 5-6 GHz (Task Group 4) (WirelessHUMANTM) 802.16.2 Coexistence 802.16 Publicity 21
5GHz Technology IEEE 802.16b * 2000.12 월기준 22
5GHz Technology IEEE 802.16b 23
5GHz Technology IEEE 802.16b 24
5GHz Technology IEEE 802.16b 25
5GHz Technology IEEE 802.16b 26
5GHz Technology IEEE 802.16b 27
5GHz 주요장비부품벤더 Two-Chip AR5000 Solution - Radio on a Chip & Baseband MAC Chip -Compliant with the IEEE 802.11a, 5-GHz industry standard up to 54 Mbps - Enhanced "turbo mode" for greater range and speeds up to 72 Mbps - Availability : Summer 2001 - Pricing : Under $35 (100k base) Two Chip Solution -the R-M11a baseband modem and R-RF5 5-GHz radio transceiver on the IEEE 802.11a standard. - data rates as high as 54 Mbps -The 64-tone R-M11a COFDM (coded-ofdm) PHY -Pricing : Under $35 (100k base) Intersil, National Semiconductor, Envara Philips, Proxim, WiLAN 등에서도개발중 28
Atheros Card Access 2001 년 8 월에 PC 탑재형으로 300$ 이하출시예정 Intermec Enterprise, SOHO, Industrial 등용도 2001 Q3($895~$2100 for AP) Proxim Enterprise customers 2001 Q4($599 for AP, $199 for PC card) TDK 802.11a+V.92, 802.11a+10/100 Ethernet, 802.11a+802.11b Multifunction Product 2001 Q3~2002.Q1 Xircom AP Radiata CISCO(Aironet) M&A 5GHz 주요장비개발동향 802.11a HIPERLAN/2 Ericsson Intersil Nokia Lucent 자체 Chip Solution 개발 2002 년 Q1 802.11a/HIPERLAN/2 개발 802.11a/HIPERLAN2 지원 Chip 개발 802.16a/b Adaptive Broadband AB Access Aperto Packetwave System Nextnet Expedience Western Multiplex 29
5GHz 주요장비장비벤더 (IEEE 802.11a, HIPERLAN/2) Key Features High Throughput Up to 54 Mbps (gross)/ofdm LAN Coverage Indoor ~30 m Outdoor ~150m Quality of Service, QoS Supports voice, video and multimedia applications 802.1p and ATM QoS Scalable Security 56 bit to 168 bit key encryption (DES) Optional pre-shared or public key authentication 2002 년상반기상용품출시예정 30
5GHz 주요장비장비벤더 (IEEE 802.16a/b) AB-ACCESS U-NII SYSTEM SPECIFICATIONS Speed : 섹터당 25 Mbps Interfaces : Subscriber Unit 과 Access Point 의 RJ45 포트는 ATM 25 (U-NII signaling) 과 Ethernet (10BaseT) 을지원하며, Cell site 장비는 ATM 또는 Ethernet 기반을지원함 Modulation : QPSK MAC : TDMA/TDD Users : 섹터당동시 254 사용자지원하며, 각 Subscriber Unit 는무제한의 User 를지원함 Network Management GUI 를지원하는중앙관리시스템으로 Cell site, Control Server 와 Subscriber Units 이 IP 로통신되며, Cell site 에서 AP 를관리하기위한 Linux 기반의 Control Server 시스템 31
5GHz 서비스추진동향 Worldwide Usage 32
5GHz 서비스추진동향 5GHz U-NII Bands in U.S. 33
5GHz 서비스추진동향 5GHz Spectrum in Europe 5.470 5.725 1. HIPERLAN/2 must comply with (ERC/DEC/(99)23) 2. TPC provides 3dB mitigation factor 3b. DFS across at least 255 MHz (outdoor) 3a. DFS across at least 330 MHz (indoor) HIPERLAN 1 W indoor/outdoor 5.150 5.350 HIPERLAN 200 mw indoor ISM 25 mw 5.725 5.875 5.000 5.100 5.200 5.300 5.400 5.500 5.600 5.700 5.800 5.900 6.000 GHz Aeronautical Navigation Satellite FSS Radar, Navigation, Earth exploration Satellite Radio navigation, Maritime navigation Radiolocation, Amateur Primary Users 34
5GHz 서비스추진동향 5GHz 전세계주파수분배현황 Allocation Aero - Radio Navigation Fixed Sat. Radio Locat. EESS Space Re. Aero-Radio Navigation EESS Radio Locat. Radio - Navi. Radio - Locat. Maritime Radio Navi. Radio Locat. Radio Locat. Amateur Space Research Radio Locat. Amateur Amateur Sat. U-NII(200MHz) U-NII(100MHz) USA Europe HIPERLAN (200MHz) HIPERLAN (255MHz) * UK considering licensed for commercial usage BMAS (100MHz) FWA (Licensed) Wireless LAN (100MHz) Japan In Progress In Progress Wireless LAN (100MHz) Korea 5150 MHz 5250 5350 5470 5550 5570 5725 5825 *U-NII : Unlicensed-National Information Infrastructure *HIPERLAN: High Performance LAN *BMAS : Broadband Mobile Access System 35
5GHz 서비스추진동향유럽 5GHz 서비스추진동향 1996 년 ERC/DEC/(96)03 5.150~5.250GHz HIPERLAN 대역지정 1998 년향후무선멀티미디어시장을고려, HIPERLAN 이용을위한 5GHz 추가검토 ERC Report 72 5.250~5.350GHz(for Indoor, EIRP 200mW, DFS/TPC 사용 ) 5.470~5.725GHz (for outdoor and indoor, EIRP 1W, DFS/TPC 사용 ) 36
5GHz 서비스추진동향 ERC Report 72 Frequency band(mhz) 5250~5255 5255~5350 5350~5450 5450~5460 5460~5470 CEPT allocation RADIOLOCATION EESS(active) SPACE RESEARCH RADIOLOCATION EESS(active) SPACE RESEARCH(active) AERONAUTICAL RADIONAVIGATION EESS(active) AERONAUTICAL RADIONAVIGATION EESS(active) RADIONAVIGATION S5.449 AERONAUTICAL(Annex 1) Requirement for possible HIPERLAN use HIPERLAN Indoor use EIRP 200mW TPC(3dB mitigation factor) DFS Sharing is not feasible 5470~5650 MARTIME RADIONAVIGATION EIRP 1W 5600~5650 S5.452 METETOLOGICAL RADARS Indoor and Outdoor use 5650~5725 RADIOLOCATION DFS 5725~5850 FSS(E to S) HIPERLAN Indoor use RADIOLOCATION EIRP 200mW 5795~5805 RTTT TPC(3dB mitigation factor) DFS EESS(Earth Exploration-Satellite Service), RTTT(Road Transport and Traffic Telemetric) TPC(Transmitter Power Control), DFS(Dynamic Frequency Selection) 37
5GHz 서비스추진동향유럽 5GHz 주파수분배현황 ERC Recommendation 70-03 Relating to the use of Short Range Devices (SRD) Annex 3 Band B RLANs and HIPERLANs 5150-5350 MHz Country Restriction Reason/Remark Belgium 5250-5350 MHz excluded Croatia Licence required France 5250-5350 excluded Governmental band Hungary 5250-5350 MHz excluded Italy Limited to 5150-5250 MHz Military applications Latvia Not implemented Under study Luxembourg None System provider for third party traffic may require a Telecommunications Act Poland Not implemented Implementation planned Portugal Licence required Implementation planned. Spain Not implemented Sweden Licence required With standards - licence exempted The Netherlands Not implemented Implementation planned United Kingdom None System provider for third party traffic may require a Wireless Telegraphy and/or Telecommunictions Act Licence 38
5GHz 서비스추진동향유럽 5GHz 주파수분배현황 5470-5725 MHz Country Restriction Reason/Remark Austria Not implemented Military band Bulgaria Not implemented Croatia Licence required France Not implemented France will implement this band identified by the ERC DEC(99)23 when the efficien y of the mitigation techniques made mandatory by this Decision is Italy Not implemented Military applications Latvia Not implemented Under study Luxembourg None System provider for third party traffic may require a Telecommunications Act Poland Not implemented Implementation planned Portugal Licence required Implementation planned. Spain Not implemented Switzerland Not implemented Exclusive Military band The Netherlands Not implemented Implementation planned Turkey Not implemented United Kingdom Licence planned System provider for third party traffic may require a Wireless Telegraphy and/or Telecommunictions Act Licence 39
5GHz 서비스추진동향미국 5GHz 서비스추진현황 1995 년 WIN Forum 에서 5.15~5.35GHz 대역을 SUPERNET (Shared Unlicensed Personal Radio Network), High Speed Wireless Network 을위해분배요청 APPLE 사도같은대역을 NII(National Information Infrastructure) 용도로분배요청 1997 년 FCC 는 5.15~5.35GHz & 5.725~5.825GHz 을 U-NII (Unlicensed-NII) 대역으로분배함 1999 년 IEEE 802.11a 를 5GHz WLAN standard 로채택함 40
5GHz 서비스 추진동향 표준화 추진동향 IEEE 802.11a US OFDM 5 GHz 6-54 Mbit/s BRAN Japan Europe HIPERLAN/2 OFDM 5 GHz 6-54 Mbit/s MMAC HIPERLINK 17 GHz 155 Mbit/s Ultra High Speed Wireless LAN 5GHz Band 60GHz Mobile Access 156 Mbit/s 41
5GHz 서비스추진동향표준화추진동향 IEEE 802.11a (wireless Ethernet) 5GWIAG IEEE 802.11e/f/h (QoS, Security, DFS/TPC,..) Joint SG Requirements Coexistence Inter-working Spectrum Interworking Standards Revisions IW additions Partnership Project (BRAN/IEEE/ MMAC) single global standard BRAN-HL/2 (wireless ATM, IP) Home Profile HE phase2 UMTS - interworking IW additions Public Access 2000 2001 MMAC also participating 42
5GHz 서비스추진동향국내 5GHz 주파수분배현황 5.150~5.250 GHz 5.250~5.350 GHz 5.350~5.470 GHz 5.470~5.725 GHz 5.725~5.825 GHz 항공무선항행이며, 위성용대역으로현재국내에서고정 위성통신의상향링크주파수로 2 개지역에서이용되고있음 무선표정, 지구탐사위성, 우주연구등으로분배되어있으며, 레이다가사용하고있음 전세계적으로항공무선항행용으로분배되어있으며, 레이다가사용하고있음 무선표정, 해상무선항행, 고정이동등으로분배되어있으며, 레이더와 TV 방송 ( 고정, 이동 ) 중계가사용되고있음 TV 방송중계 ( 고정, 이동 ) 와무선 LAN 이사용되고있음 200MHz 항공무선항행 위성통신 항공무선항행무선표정 F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 5150 5229 레이다 5250 5350 레이다 5450 255MHz 항공무선항행, 무선표정 F11 F12 F13 F14 F15 F16 F17 F18 F19 F20 F21 F22 레이다 5450 5470 5550 5650 이동중계 5700 5725 이동중계 5712.5 43
5GHz 서비스추진동향국내 5GHz 활용방안 (2000.10) 활용가능대역 활용불가능대역 활용가능대역 100MHz 실내 100MHz 실내 외 120MHz 255MHz 실내 외 5.150 5.250 5.350 5.470 5.725GHz 실내활용가능대역 : 100MHz 실내 외활용가능대역 : 355MHz 활용가능대역 : 455MHz 활용불가능대역 : 120MHz * 5.725~5.850GHz는국제적으로 ISM대역으로검토대역에서제외 44
5GHz 서비스추진동향국내서비스추진동향 2000 년 10 월 RAPA 전파자원이용자문위원회소출력무선국제도개선분과위원회에서 5GHz 대초고속무선접속망도입방안 연구를통해 5GHz 연구추진본격화 2001 년 3 월전파연구소 5GHz 대역주파수이용연구 TF 구성 TTA 전파통신기술위원회 (TC 06) 무선 LAN 연구반 /5GHz Working Group 에서표준화연구진행중 2001 년 5 월 30 일초고속무선접속포럼창립 45
5GHz 서비스추진동향국내 5GHz 활용방안 효율적이면저가의초고속망구성도농간의서비스격차해소장비의가용성과다경쟁해소 효율적이용방안기존장비와주파수공유공유를위한기술규격허가제, 비허가제대역선정 세계최고의초고속통신국가로서한국적환경에맞는 5GHz 활용방안및기술규격 46
결론 주파수는제한된자원으로효율적사용필요 5GHz 기존기상, 군사레이더, 방송송신등으로이용되고있음전세계적으로향후 Handy PC, PDA 등과같은장비이용에의한무선멀티미디어의이용의증가를고려하여, RLAN(HIPERLAN, IEEE 802.11a) 및 FWA(IEEE 802.16a/b) 에이용을위한주파수분배및이용연구진행중 국내도기존장비와의효율적이용을위한기술기준마련과 주파수배정이필요함 관련서비스개발 ( 인터넷기반의멀티미디어서비스등 ) 기존장비공유기술개발주파수할당및분배허가제를통한안정적서비스제공및국내산업활성화 47
Any Questions Chan Hyung Chung backbum@corp.thrunet.com 48