Business Experience in Implementation of WiMAX

Transcription

1 ITU-T Workshop on Bridging the Standardization Gap and Interactive Training Session (Cyberjaya, Malaysia, 29 June 1 July 2010 ) Business Experience in Implementation of WiMAX Do-Young, Kwak Researcher, KT Corporation Cyberjaya, Malaysia, 29 June 1 July 2010

2 Contents IMT-Advanced Standardization Mobile WiMAX Introduction of Mobile WiMAX Deployment Issues Summary Cyberjaya, Malaysia, 29 June 1 July

3 IMT-Advanced Standardization Cyberjaya, Malaysia, 29 June 1 July

4 Mobile Data Explosion Source: Cisco Visual Networking Index Cyberjaya, Malaysia, 29 June 1 July

5 Evolution Path in Standardization toward IMT-Advanced 2G 3G 4G Voice SMS Voice Data Voice Data Wireless Internet User-oriented Service Mobility G AMPS 2G CDMA GSM WCDMA HSDPA/HSUPA CDMA2000/Ev-DV/DO 3G 3G Ev. F-WiMAX a/d IEEE a/b LTE UMB IEEE e LTE-A WiBro/M-WiMAX WLAN IEEE m IEEE n IMT-Advanced Standard IEE VHT LTE : Long Term Evolution UMB: Ultra Mobile Broadband Data Rate Cyberjaya, Malaysia, 29 June 1 July

6 IMT-Advanced Official name of 4G defined by ITU-R SG5 WP8F [TG8/1( 85) WP8F( 00) WP5D( 08)] Key features Worldwide commonality Service compatibility Interworking capability High-quality mobile service Worldwide usability of user equipment User-friendly applications, services and equipment Worldwide roaming capability Enhanced peak data rates Candidate RIT 3GPP LTE-Advanced, IEEE m Cyberjaya, Malaysia, 29 June 1 July

7 IMT-Advanced Standardization Schedule Cyberjaya, Malaysia, 29 June 1 July

8 Spectrum Identification for IMT at WRC No distinction of IMT-2000 & IMT- Advanced in the use of frequency Cyberjaya, Malaysia, 29 June 1 July

9 IMT-Advanced Standardization Progress Issuance of Circular Letter ( ) Minimum requirements ( ) Technology Description Template : ITU-R Report M.2133 Compliance Template : ITU-R Report M.2134 Evaluation guideline : ITU-R Report M.2135 WP5D 6th meeting( ) Six IMT-Advanced Candidate Proposals submission Candidate Proposals IEEE m LTE- Advanced Proponent IEEE Japan Korea 3GPP (39 members) Japan China Contents IEEE m (TDD/FDD) IEEE Technology excluding IPR IEEE Technology excluding IPR LTE Release10&Beyond (TDD/FDD) LTE Release10&Beyond (TDD/FDD) LTE Release10&Beyond (TDD) Cyberjaya, Malaysia, 29 June 1 July

10 Preliminary Evaluation Reports WP5D 7 th meeting ( ) Candidate technologies satisfy the minimum requirements of ITU-R IMT-ADV Cyberjaya, Malaysia, 29 June 1 July

11 Mobile WiMAX Introduction Cyberjaya, Malaysia, 29 June 1 July

12 Key features of M-WiMAX Scalability High Data Rate Scalable PHY for flexible channel bandwidth as global RF band allocation vary Flexible Frequency re-use schemes for network planning Larger MAC frames with low overhead, Adaptive Modulation, Advanced FEC, H-ARQ, Beamforming(AAS), Space-Time Transmit Diversity, MIMO QoS QoS with Service Flows, Advanced Scheduling Framework, Adaptive Modulation & Coding, ARQ, H-ARQ Mobility Security Secure Handover, Optimized Hard Handover, Multicast, Broadcast, Paging, Power Management with Sleep and Idle Modes EAP authentication, Encryption with AES-CCM, CMAC Authentication, X.509 Certificates, Key Binding, Mutual Authentication, Device and User Authentication Cyberjaya, Malaysia, 29 June 1 July

13 M-WiMAX Network Architecture M-WiMAX Zone Internet Node Server Farm Edge Router AAA(Diameter) Operate Management System(Backend) Repeater switch ASN-GW IP Premium Network HA Application Service Server(Core) MS BS Access Network Internet Back Bone Server Farm BS Radio Access, Handover, Authentication, Security, QoS, Account etc ASN-GW IP Routing/Mobility management, Authentication, Security, QoS, Account, Radio Resource Management, Handover Application Server Application service Optional service Repeater MS Coverage extension Radio Access, IP Service, IP mobility, MS/user authentication, Security, Interworking w/ other network Core Network Authentication, Account, IP mobility, Interworking w/ other network Cyberjaya, Malaysia, 29 June 1 July

14 ASN ASN-GW ASN Reference Model Data Path Function Handover Fn. (Relay) Context Fn. PMIP Client AAA Client R3 RRM Relay Paging Controller Location Register Authenticator Key Distributor DHCP Proxy/Relay Srv. Flow Auth. MIP FA R4 R6 BS Data Path Function Handover Function Context Function RRC RRA Auth. Relay Srv. Flow Auth. Key Receiver Cyberjaya, Malaysia, 29 June 1 July

15 Mobile WiMAX Deployment Issues Cyberjaya, Malaysia, 29 June 1 July

16 KT WiBro(Mobile WiMAX) Commercial Service Stage Partial Commercial Service Full Commercial Service Coverage Expansion Shinchon Songpa Seoul Incheon Seoul Seocho Gangnam Daejeon Gwangju Daegu Busan Bundang 1 st Phase 1 2 nd Phase 2 Ulsan Commercial Launch (June, 2006) Expansion (May, 2008) Network Upgrade (By end of year 2010) Cyberjaya, Malaysia, 29 June 1 July

17 Operator s General Requirements charge RFP Subscriber Operator Vendor service system RFP consists of traffic assumption, price, training plan, system feature list, network architecture, O&M requirement, optimization, etc. Service plan Operator s requirements Service contents Quality of service Cyberjaya, Malaysia, 29 June 1 July

18 Coverage Maximum coverage based on IEEE e BW (MHz) Effective symbols Unallocated Frame Duration (TTG+RTG) RTG (µs) TTG (µs) RTD (µs) = TTG SSRTG Maximum Range (km) * RTD: round trip delay BS to MS, TTG: Tx to Rx transition gap at BS, RTG: Rx to Tx transition gap at BS * SSRTG: mobile station receive to transmit transition gap KT coverage criteria Minimum supportable TP per user: 512kbps(DL), 128kbps(UL) RSSI -75dBm CINR 5dB KT BS coverage in Seoul: 300 ~ 400 m About 500 BSs excluding subway BS in Seoul Cyberjaya, Malaysia, 29 June 1 July

19 Link budget Coverage: Link budget An assessment of the losses and gains that occur on a link between transmitter and receiver To predict cell coverage Input Link Factor b/w Tx and Rx Link Budget Analysis * MAPL : Maximum Allowable Path Loss Output MAPL Propagation model Cell Coverage Link budget analysis process MAPL(dB) = Tx_EIRP Rx_sensitivity + sum of (gains & losses) Tx_EIRP: Max Tx power per traffic channel + Tx ant. gain cable loss Rx_sensitivity: Required minimum received signal power at Rx Cyberjaya, Malaysia, 29 June 1 July

20 Coverage? Remote RF Unit Repeater Solution RRF Solution BS Baseband BS + RARi MHU To ASN-GW To ASN-GW Coxial Cable (Analog IF) Optic cable (Base Band I/Q) Optic cable (Digital IF) ROU RRF ROU ROU RRF RRF ROU RRF ROU ROU Cyberjaya, Malaysia, 29 June 1 July 2010 RRF RRF 19

21 Coverage? Indoor Solution Indoor Repeater solution Mobile WiMAX Femtocell, Picocell and Microcell solution Cyberjaya, Malaysia, 29 June 1 July

22 Fast Link Adaptation Adaptive Modulation on a burst by burst basis Each subscriber operates at the data rate corresponding to its link quality MCS table: MCS level transition criterion Outer loop power control: efficiency improvement at user throughput Cyberjaya, Malaysia, 29 June 1 July

23 Handover Process Handover in M-WiMAX: Hard handover Handover Process Cell reselection Receiving neighbor BS information (MOB_NBR-ADV) Scanning neighbor BSs HO decision & Initiation Handover decision from Serving BS to Target BS Synchronization to Target BS Downlink Ranging Handover RNG processing for synchronization to target BS uplink Handover optimization process Termination of MS context in serving BS Inter-sector, Inter-BS, Inter-ACR Handover Cyberjaya, Malaysia, 29 June 1 July

24 Performance Evaluation Simulation components Cyberjaya, Malaysia, 29 June 1 July

25 Performance Evaluation Link level simulation To probe the characteristics of a point-to-point link Result Link performance curves (as a function of received SNR) Link-level simulation results for AWGN channel Cyberjaya, Malaysia, 29 June 1 July

26 Performance Evaluation System level simulation To evaluate the overall performance of a whole system Result: System throughput Snap time simulation Full motion simulation SINR distribution (MIMO) Average system throughput Cyberjaya, Malaysia, 29 June 1 July

27 Summary IMT-Advanced standards establishment Scheduled to be early 2011 through the expert evaluation process 2 Candidate RITs: LTE-Advanced, IEEE m Now evaluation stage Candidate RITs satisfy the minimum requirements Mobile WiMAX Flat architecture due to All-IP services Deployment issues Coverage Fast link adaptation Handover Performance evaluation Cyberjaya, Malaysia, 29 June 1 July

28 Thank You Q & A dykwak@kt.com Cyberjaya, Malaysia, 29 June 1 July